# Release notes

Note

Scrapy 1.x will be the last series supporting Python 2. Scrapy 2.0, planned for Q4 2019 or Q1 2020, will support Python 3 only.

## Scrapy 1.7.3 (2019-08-01)

Enforce lxml 4.3.5 or lower for Python 3.4 (issue 3912, issue 3918).

## Scrapy 1.7.2 (2019-07-23)

Fix Python 2 support (issue 3889, issue 3893, issue 3896).

## Scrapy 1.7.1 (2019-07-18)

Re-packaging of Scrapy 1.7.0, which was missing some changes in PyPI.

## Scrapy 1.7.0 (2019-07-18)

Note

Make sure you install Scrapy 1.7.1. The Scrapy 1.7.0 package in PyPI is the result of an erroneous commit tagging and does not include all the changes described below.

Highlights:

- Improvements for crawls targeting multiple domains
- A cleaner way to pass arguments to callbacks
- A new class for JSON requests
- Improvements for rule-based spiders
- New features for feed exports

### Backward-incompatible changes

- `429` is now part of the `RETRY_HTTP_CODES` setting by default

  This change is backward incompatible. If you don’t want to retry `429`, you must override `RETRY_HTTP_CODES` accordingly.

- `Crawler`, `CrawlerRunner.crawl` and `CrawlerRunner.create_crawler` no longer accept a `Spider` subclass instance, they only accept a `Spider` subclass now.

  `Spider` subclass instances were never meant to work, and they were not working as one would expect: instead of using the passed `Spider` subclass instance, their `from_crawler` method was called to generate a new instance.

- Non-default values for the `SCHEDULER_PRIORITY_QUEUE` setting may stop working. Scheduler priority queue classes now need to handle `Request` objects instead of arbitrary Python data structures.

See also Deprecation removals below.

### New features

- A new scheduler priority queue, `scrapy.pqueues.DownloaderAwarePriorityQueue`, may be enabled for a significant scheduling improvement on crawls targetting multiple web domains, at the cost of no `CONCURRENT_REQUESTS_PER_IP` support (issue 3520)
- A new `Request.cb_kwargs` attribute provides a cleaner way to pass keyword arguments to callback methods (issue 1138, issue 3563)
- A new `JSONRequest` class offers a more convenient way to build JSON requests (issue 3504, issue 3505)
- A `process_request` callback passed to the `Rule` constructor now receives the `Response` object that originated the request as its second argument (issue 3682)
- A new `restrict_text` parameter for the `LinkExtractor` constructor allows filtering links by linking text (issue 3622, issue 3635)
- A new `FEED_STORAGE_S3_ACL` setting allows defining a custom ACL for feeds exported to Amazon S3 (issue 3607)
- A new `FEED_STORAGE_FTP_ACTIVE` setting allows using FTP’s active connection mode for feeds exported to FTP servers (issue 3829)
- A new `METAREFRESH_IGNORE_TAGS` setting allows overriding which HTML tags are ignored when searching a response for HTML meta tags that trigger a redirect (issue 1422, issue 3768)
- A new `redirect_reasons` request meta key exposes the reason (status code, meta refresh) behind every followed redirect (issue 3581, issue 3687)
- The `SCRAPY_CHECK` variable is now set to the `true` string during runs of the `check` command, which allows detecting contract check runs from code (issue 3704, issue 3739)
- A new `Item.deepcopy()` method makes it easier to deep-copy items (issue 1493, issue 3671)
- `CoreStats` also logs `elapsed_time_seconds` now (issue 3638)
- Exceptions from `ItemLoader` input and output processors are now more verbose (issue 3836, issue 3840)
- `Crawler`, `CrawlerRunner.crawl` and `CrawlerRunner.create_crawler` now fail gracefully if they receive a `Spider` subclass instance instead of the subclass itself (issue 2283, issue 3610, issue 3872)

### Bug fixes

- `process_spider_exception()` is now also invoked for generators (issue 220, issue 2061)
- System exceptions like KeyboardInterrupt are no longer caught (issue 3726)
- `ItemLoader.load_item()` no longer makes later calls to `ItemLoader.get_output_value()` or `ItemLoader.load_item()` return empty data (issue 3804, issue 3819)
- The images pipeline (`ImagesPipeline`) no longer ignores these Amazon S3 settings: `AWS_ENDPOINT_URL`, `AWS_REGION_NAME`, `AWS_USE_SSL`, `AWS_VERIFY` (issue 3625)
- Fixed a memory leak in `MediaPipeline` affecting, for example, non-200 responses and exceptions from custom middlewares (issue 3813)
- Requests with private callbacks are now correctly unserialized from disk (issue 3790)
- `FormRequest.from_response()` now handles invalid methods like major web browsers (issue 3777, issue 3794)

### Documentation

- A new topic, Selecting dynamically-loaded content, covers recommended approaches to read dynamically-loaded data (issue 3703)
- Broad Crawls now features information about memory usage (issue 1264, issue 3866)
- The documentation of `Rule` now covers how to access the text of a link when using `CrawlSpider` (issue 3711, issue 3712)
- A new section, Writing your own storage backend, covers writing a custom cache storage backend for `HttpCacheMiddleware` (issue 3683, issue 3692)
- A new FAQ entry, How to split an item into multiple items in an item pipeline?, explains what to do when you want to split an item into multiple items from an item pipeline (issue 2240, issue 3672)
- Updated the FAQ entry about crawl order to explain why the first few requests rarely follow the desired order (issue 1739, issue 3621)
- The `LOGSTATS_INTERVAL` setting (issue 3730), the `FilesPipeline.file_path` and `ImagesPipeline.file_path` methods (issue 2253, issue 3609) and the `Crawler.stop()` method (issue 3842) are now documented
- Some parts of the documentation that were confusing or misleading are now clearer (issue 1347, issue 1789, issue 2289, issue 3069, issue 3615, issue 3626, issue 3668, issue 3670, issue 3673, issue 3728, issue 3762, issue 3861, issue 3882)
- Minor documentation fixes (issue 3648, issue 3649, issue 3662, issue 3674, issue 3676, issue 3694, issue 3724, issue 3764, issue 3767, issue 3791, issue 3797, issue 3806, issue 3812)

### Deprecation removals

The following deprecated APIs have been removed (issue 3578):

- `scrapy.conf` (use `Crawler.settings`)
- From `scrapy.core.downloader.handlers`:
  - `http.HttpDownloadHandler` (use `http10.HTTP10DownloadHandler`)
- `scrapy.loader.ItemLoader._get_values` (use `_get_xpathvalues`)
- `scrapy.loader.XPathItemLoader` (use `ItemLoader`)
- `scrapy.log` (see Logging)
- From `scrapy.pipelines`:
  - `files.FilesPipeline.file_key` (use `file_path`)
  - `images.ImagesPipeline.file_key` (use `file_path`)
  - `images.ImagesPipeline.image_key` (use `file_path`)
  - `images.ImagesPipeline.thumb_key` (use `thumb_path`)
- From both `scrapy.selector` and `scrapy.selector.lxmlsel`:
  - `HtmlXPathSelector` (use `Selector`)
  - `XmlXPathSelector` (use `Selector`)
  - `XPathSelector` (use `Selector`)
  - `XPathSelectorList` (use `Selector`)
- From `scrapy.selector.csstranslator`:
  - `ScrapyGenericTranslator` (use parsel.csstranslator.GenericTranslator)
  - `ScrapyHTMLTranslator` (use parsel.csstranslator.HTMLTranslator)
  - `ScrapyXPathExpr` (use parsel.csstranslator.XPathExpr)
- From `Selector`:
  - `_root` (both the constructor argument and the object property, use `root`)
  - `extract_unquoted` (use `getall`)
  - `select` (use `xpath`)
- From `SelectorList`:
  - `extract_unquoted` (use `getall`)
  - `select` (use `xpath`)
  - `x` (use `xpath`)
- `scrapy.spiders.BaseSpider` (use `Spider`)
- From `Spider` (and subclasses):
  - `DOWNLOAD_DELAY` (use download_delay)
  - `set_crawler` (use `from_crawler()`)
- `scrapy.spiders.spiders` (use `SpiderLoader`)
- `scrapy.telnet` (use `scrapy.extensions.telnet`)
- From `scrapy.utils.python`:
  - `str_to_unicode` (use `to_unicode`)
  - `unicode_to_str` (use `to_bytes`)
- `scrapy.utils.response.body_or_str`

The following deprecated settings have also been removed (issue 3578):

- `SPIDER_MANAGER_CLASS` (use `SPIDER_LOADER_CLASS`)

### Deprecations

- The `queuelib.PriorityQueue` value for the `SCHEDULER_PRIORITY_QUEUE` setting is deprecated. Use `scrapy.pqueues.ScrapyPriorityQueue` instead.
- `process_request` callbacks passed to `Rule` that do not accept two arguments are deprecated.
- The following modules are deprecated:
  - `scrapy.utils.http` (use w3lib.http)
  - `scrapy.utils.markup` (use w3lib.html)
  - `scrapy.utils.multipart` (use urllib3)
- The `scrapy.utils.datatypes.MergeDict` class is deprecated for Python 3 code bases. Use `ChainMap` instead. (issue 3878)
- The `scrapy.utils.gz.is_gzipped` function is deprecated. Use `scrapy.utils.gz.gzip_magic_number` instead.

### Other changes

- It is now possible to run all tests from the same tox environment in parallel; the documentation now covers this and other ways to run tests (issue 3707)
- It is now possible to generate an API documentation coverage report (issue 3806, issue 3810, issue 3860)
- The documentation policies now require docstrings (issue 3701) that follow PEP 257 (issue 3748)
- Internal fixes and cleanup (issue 3629, issue 3643, issue 3684, issue 3698, issue 3734, issue 3735, issue 3736, issue 3737, issue 3809, issue 3821, issue 3825, issue 3827, issue 3833, issue 3857, issue 3877)

## Scrapy 1.6.0 (2019-01-30)

Highlights:

- better Windows support;
- Python 3.7 compatibility;
- big documentation improvements, including a switch from `.extract_first()` + `.extract()` API to `.get()` + `.getall()` API;
- feed exports, FilePipeline and MediaPipeline improvements;
- better extensibility: `item_error` and `request_reached_downloader` signals; `from_crawler` support for feed exporters, feed storages and dupefilters.
- `scrapy.contracts` fixes and new features;
- telnet console security improvements, first released as a backport in Scrapy 1.5.2 (2019-01-22);
- clean-up of the deprecated code;
- various bug fixes, small new features and usability improvements across the codebase.

### Selector API changes

While these are not changes in Scrapy itself, but rather in the parsel library which Scrapy uses for xpath/css selectors, these changes are worth mentioning here. Scrapy now depends on parsel >= 1.5, and Scrapy documentation is updated to follow recent `parsel` API conventions.

Most visible change is that `.get()` and `.getall()` selector methods are now preferred over `.extract_first()` and `.extract()`. We feel that these new methods result in a more concise and readable code. See extract() and extract_first() for more details.

Note

There are currently no plans to deprecate `.extract()` and `.extract_first()` methods.

Another useful new feature is the introduction of `Selector.attrib` and `SelectorList.attrib` properties, which make it easier to get attributes of HTML elements. See Selecting element attributes.

CSS selectors are cached in parsel >= 1.5, which makes them faster when the same CSS path is used many times. This is very common in case of Scrapy spiders: callbacks are usually called several times, on different pages.

If you’re using custom `Selector` or `SelectorList` subclasses, a backward incompatible change in parsel may affect your code. See parsel changelog for a detailed description, as well as for the full list of improvements.

### Telnet console

Backward incompatible: Scrapy’s telnet console now requires username and password. See Telnet Console for more details. This change fixes a security issue; see Scrapy 1.5.2 (2019-01-22) release notes for details.

### New extensibility features

- `from_crawler` support is added to feed exporters and feed storages. This, among other things, allows to access Scrapy settings from custom feed storages and exporters (issue 1605, issue 3348).
- `from_crawler` support is added to dupefilters (issue 2956); this allows to access e.g. settings or a spider from a dupefilter.
- `item_error` is fired when an error happens in a pipeline (issue 3256);
- `request_reached_downloader` is fired when Downloader gets a new Request; this signal can be useful e.g. for custom Schedulers (issue 3393).
- new SitemapSpider `sitemap_filter()` method which allows to select sitemap entries based on their attributes in SitemapSpider subclasses (issue 3512).
- Lazy loading of Downloader Handlers is now optional; this enables better initialization error handling in custom Downloader Handlers (issue 3394).

### New FilePipeline and MediaPipeline features

- Expose more options for S3FilesStore: `AWS_ENDPOINT_URL`, `AWS_USE_SSL`, `AWS_VERIFY`, `AWS_REGION_NAME`. For example, this allows to use alternative or self-hosted AWS-compatible providers (issue 2609, issue 3548).
- ACL support for Google Cloud Storage: `FILES_STORE_GCS_ACL` and `IMAGES_STORE_GCS_ACL` (issue 3199).

### `scrapy.contracts` improvements

- Exceptions in contracts code are handled better (issue 3377);
- `dont_filter=True` is used for contract requests, which allows to test different callbacks with the same URL (issue 3381);
- `request_cls` attribute in Contract subclasses allow to use different Request classes in contracts, for example FormRequest (issue 3383).
- Fixed errback handling in contracts, e.g. for cases where a contract is executed for URL which returns non-200 response (issue 3371).

### Usability improvements

- more stats for RobotsTxtMiddleware (issue 3100)
- INFO log level is used to show telnet host/port (issue 3115)
- a message is added to IgnoreRequest in RobotsTxtMiddleware (issue 3113)
- better validation of `url` argument in `Response.follow` (issue 3131)
- non-zero exit code is returned from Scrapy commands when error happens on spider inititalization (issue 3226)
- Link extraction improvements: “ftp” is added to scheme list (issue 3152); “flv” is added to common video extensions (issue 3165)
- better error message when an exporter is disabled (issue 3358);
- `scrapy shell --help` mentions syntax required for local files (`./file.html`) - issue 3496.
- Referer header value is added to RFPDupeFilter log messages (issue 3588)

### Bug fixes

- fixed issue with extra blank lines in .csv exports under Windows (issue 3039);
- proper handling of pickling errors in Python 3 when serializing objects for disk queues (issue 3082)
- flags are now preserved when copying Requests (issue 3342);
- FormRequest.from_response clickdata shouldn’t ignore elements with `input[type=image]` (issue 3153).
- FormRequest.from_response should preserve duplicate keys (issue 3247)

### Documentation improvements

- Docs are re-written to suggest .get/.getall API instead of .extract/.extract_first. Also, Selectors docs are updated and re-structured to match latest parsel docs; they now contain more topics, such as Selecting element attributes or Extensions to CSS Selectors (issue 3390).
- Using your browser’s Developer Tools for scraping is a new tutorial which replaces old Firefox and Firebug tutorials (issue 3400).
- SCRAPY_PROJECT environment variable is documented (issue 3518);
- troubleshooting section is added to install instructions (issue 3517);
- improved links to beginner resources in the tutorial (issue 3367, issue 3468);
- fixed `RETRY_HTTP_CODES` default values in docs (issue 3335);
- remove unused `DEPTH_STATS` option from docs (issue 3245);
- other cleanups (issue 3347, issue 3350, issue 3445, issue 3544, issue 3605).

### Deprecation removals

Compatibility shims for pre-1.0 Scrapy module names are removed (issue 3318):

- `scrapy.command`
- `scrapy.contrib` (with all submodules)
- `scrapy.contrib_exp` (with all submodules)
- `scrapy.dupefilter`
- `scrapy.linkextractor`
- `scrapy.project`
- `scrapy.spider`
- `scrapy.spidermanager`
- `scrapy.squeue`
- `scrapy.stats`
- `scrapy.statscol`
- `scrapy.utils.decorator`

See Module Relocations for more information, or use suggestions from Scrapy 1.5.x deprecation warnings to update your code.

Other deprecation removals:

- Deprecated scrapy.interfaces.ISpiderManager is removed; please use scrapy.interfaces.ISpiderLoader.
- Deprecated `CrawlerSettings` class is removed (issue 3327).
- Deprecated `Settings.overrides` and `Settings.defaults` attributes are removed (issue 3327, issue 3359).

### Other improvements, cleanups

- All Scrapy tests now pass on Windows; Scrapy testing suite is executed in a Windows environment on CI (issue 3315).
- Python 3.7 support (issue 3326, issue 3150, issue 3547).
- Testing and CI fixes (issue 3526, issue 3538, issue 3308, issue 3311, issue 3309, issue 3305, issue 3210, issue 3299)
- `scrapy.http.cookies.CookieJar.clear` accepts “domain”, “path” and “name” optional arguments (issue 3231).
- additional files are included to sdist (issue 3495);
- code style fixes (issue 3405, issue 3304);
- unneeded .strip() call is removed (issue 3519);
- collections.deque is used to store MiddlewareManager methods instead of a list (issue 3476)

## Scrapy 1.5.2 (2019-01-22)

- Security bugfix: Telnet console extension can be easily exploited by rogue websites POSTing content to http://localhost:6023, we haven’t found a way to exploit it from Scrapy, but it is very easy to trick a browser to do so and elevates the risk for local development environment.

  The fix is backward incompatible, it enables telnet user-password authentication by default with a random generated password. If you can’t upgrade right away, please consider setting `TELNET_CONSOLE_PORT` out of its default value.

  See telnet console documentation for more info

- Backport CI build failure under GCE environemnt due to boto import error.

## Scrapy 1.5.1 (2018-07-12)

This is a maintenance release with important bug fixes, but no new features:

- `O(N^2)` gzip decompression issue which affected Python 3 and PyPy is fixed (issue 3281);
- skipping of TLS validation errors is improved (issue 3166);
- Ctrl-C handling is fixed in Python 3.5+ (issue 3096);
- testing fixes (issue 3092, issue 3263);
- documentation improvements (issue 3058, issue 3059, issue 3089, issue 3123, issue 3127, issue 3189, issue 3224, issue 3280, issue 3279, issue 3201, issue 3260, issue 3284, issue 3298, issue 3294).

## Scrapy 1.5.0 (2017-12-29)

This release brings small new features and improvements across the codebase. Some highlights:

- Google Cloud Storage is supported in FilesPipeline and ImagesPipeline.
- Crawling with proxy servers becomes more efficient, as connections to proxies can be reused now.
- Warnings, exception and logging messages are improved to make debugging easier.
- `scrapy parse` command now allows to set custom request meta via `--meta` argument.
- Compatibility with Python 3.6, PyPy and PyPy3 is improved; PyPy and PyPy3 are now supported officially, by running tests on CI.
- Better default handling of HTTP 308, 522 and 524 status codes.
- Documentation is improved, as usual.

### Backward Incompatible Changes

- Scrapy 1.5 drops support for Python 3.3.
- Default Scrapy User-Agent now uses https link to scrapy.org (issue 2983). This is technically backward-incompatible; override `USER_AGENT` if you relied on old value.
- Logging of settings overridden by `custom_settings` is fixed; this is technically backward-incompatible because the logger changes from `[scrapy.utils.log]` to `[scrapy.crawler]`. If you’re parsing Scrapy logs, please update your log parsers (issue 1343).
- LinkExtractor now ignores `m4v` extension by default, this is change in behavior.
- 522 and 524 status codes are added to `RETRY_HTTP_CODES` (issue 2851)

### New features

- Support `<link>` tags in `Response.follow` (issue 2785)
- Support for `ptpython` REPL (issue 2654)
- Google Cloud Storage support for FilesPipeline and ImagesPipeline (issue 2923).
- New `--meta` option of the “scrapy parse” command allows to pass additional request.meta (issue 2883)
- Populate spider variable when using `shell.inspect_response` (issue 2812)
- Handle HTTP 308 Permanent Redirect (issue 2844)
- Add 522 and 524 to `RETRY_HTTP_CODES` (issue 2851)
- Log versions information at startup (issue 2857)
- `scrapy.mail.MailSender` now works in Python 3 (it requires Twisted 17.9.0)
- Connections to proxy servers are reused (issue 2743)
- Add template for a downloader middleware (issue 2755)
- Explicit message for NotImplementedError when parse callback not defined (issue 2831)
- CrawlerProcess got an option to disable installation of root log handler (issue 2921)
- LinkExtractor now ignores `m4v` extension by default
- Better log messages for responses over `DOWNLOAD_WARNSIZE` and `DOWNLOAD_MAXSIZE` limits (issue 2927)
- Show warning when a URL is put to `Spider.allowed_domains` instead of a domain (issue 2250).

### Bug fixes

- Fix logging of settings overridden by `custom_settings`; this is technically backward-incompatible because the logger changes from `[scrapy.utils.log]` to `[scrapy.crawler]`, so please update your log parsers if needed (issue 1343)
- Default Scrapy User-Agent now uses https link to scrapy.org (issue 2983). This is technically backward-incompatible; override `USER_AGENT` if you relied on old value.
- Fix PyPy and PyPy3 test failures, support them officially (issue 2793, issue 2935, issue 2990, issue 3050, issue 2213, issue 3048)
- Fix DNS resolver when `DNSCACHE_ENABLED=False` (issue 2811)
- Add `cryptography` for Debian Jessie tox test env (issue 2848)
- Add verification to check if Request callback is callable (issue 2766)
- Port `extras/qpsclient.py` to Python 3 (issue 2849)
- Use getfullargspec under the scenes for Python 3 to stop DeprecationWarning (issue 2862)
- Update deprecated test aliases (issue 2876)
- Fix `SitemapSpider` support for alternate links (issue 2853)

### Docs

- Added missing bullet point for the `AUTOTHROTTLE_TARGET_CONCURRENCY` setting. (issue 2756)
- Update Contributing docs, document new support channels (issue 2762, issue:3038)
- Include references to Scrapy subreddit in the docs
- Fix broken links; use https:// for external links (issue 2978, issue 2982, issue 2958)
- Document CloseSpider extension better (issue 2759)
- Use `pymongo.collection.Collection.insert_one()` in MongoDB example (issue 2781)
- Spelling mistake and typos (issue 2828, issue 2837, issue 2884, issue 2924)
- Clarify `CSVFeedSpider.headers` documentation (issue 2826)
- Document `DontCloseSpider` exception and clarify `spider_idle` (issue 2791)
- Update “Releases” section in README (issue 2764)
- Fix rst syntax in `DOWNLOAD_FAIL_ON_DATALOSS` docs (issue 2763)
- Small fix in description of startproject arguments (issue 2866)
- Clarify data types in Response.body docs (issue 2922)
- Add a note about `request.meta['depth']` to DepthMiddleware docs (issue 2374)
- Add a note about `request.meta['dont_merge_cookies']` to CookiesMiddleware docs (issue 2999)
- Up-to-date example of project structure (issue 2964, issue 2976)
- A better example of ItemExporters usage (issue 2989)
- Document `from_crawler` methods for spider and downloader middlewares (issue 3019)

## Scrapy 1.4.0 (2017-05-18)

Scrapy 1.4 does not bring that many breathtaking new features but quite a few handy improvements nonetheless.

Scrapy now supports anonymous FTP sessions with customizable user and password via the new `FTP_USER` and `FTP_PASSWORD` settings. And if you’re using Twisted version 17.1.0 or above, FTP is now available with Python 3.

There’s a new `response.follow` method for creating requests; it is now a recommended way to create Requests in Scrapy spiders. This method makes it easier to write correct spiders; `response.follow` has several advantages over creating `scrapy.Request` objects directly:

- it handles relative URLs;
- it works properly with non-ascii URLs on non-UTF8 pages;
- in addition to absolute and relative URLs it supports Selectors; for `<a>` elements it can also extract their href values.

For example, instead of this:

    for href in response.css('li.page a::attr(href)').extract():
        url = response.urljoin(href)
        yield scrapy.Request(url, self.parse, encoding=response.encoding)

One can now write this:

    for a in response.css('li.page a'):
        yield response.follow(a, self.parse)

Link extractors are also improved. They work similarly to what a regular modern browser would do: leading and trailing whitespace are removed from attributes (think `href=" http://example.com"`) when building `Link` objects. This whitespace-stripping also happens for `action` attributes with `FormRequest`.

Please also note that link extractors do not canonicalize URLs by default anymore. This was puzzling users every now and then, and it’s not what browsers do in fact, so we removed that extra transformation on extracted links.

For those of you wanting more control on the `Referer:` header that Scrapy sends when following links, you can set your own `Referrer Policy`. Prior to Scrapy 1.4, the default `RefererMiddleware` would simply and blindly set it to the URL of the response that generated the HTTP request (which could leak information on your URL seeds). By default, Scrapy now behaves much like your regular browser does. And this policy is fully customizable with W3C standard values (or with something really custom of your own if you wish). See `REFERRER_POLICY` for details.

To make Scrapy spiders easier to debug, Scrapy logs more stats by default in 1.4: memory usage stats, detailed retry stats, detailed HTTP error code stats. A similar change is that HTTP cache path is also visible in logs now.

Last but not least, Scrapy now has the option to make JSON and XML items more human-readable, with newlines between items and even custom indenting offset, using the new `FEED_EXPORT_INDENT` setting.

Enjoy! (Or read on for the rest of changes in this release.)

### Deprecations and Backward Incompatible Changes

- Default to `canonicalize=False` in `scrapy.linkextractors.LinkExtractor` (issue 2537, fixes issue 1941 and issue 1982): warning, this is technically backward-incompatible
- Enable memusage extension by default (issue 2539, fixes issue 2187); this is technically backward-incompatible so please check if you have any non-default `MEMUSAGE_***` options set.
- `EDITOR` environment variable now takes precedence over `EDITOR` option defined in settings.py (issue 1829); Scrapy default settings no longer depend on environment variables. This is technically a backward incompatible change.
- `Spider.make_requests_from_url` is deprecated (issue 1728, fixes issue 1495).

### New Features

- Accept proxy credentials in `proxy` request meta key (issue 2526)
- Support brotli-compressed content; requires optional brotlipy (issue 2535)
- New response.follow shortcut for creating requests (issue 1940)
- Added `flags` argument and attribute to `Request` objects (issue 2047)
- Support Anonymous FTP (issue 2342)
- Added `retry/count`, `retry/max_reached` and `retry/reason_count/<reason>` stats to `RetryMiddleware` (issue 2543)
- Added `httperror/response_ignored_count` and `httperror/response_ignored_status_count/<status>` stats to `HttpErrorMiddleware` (issue 2566)
- Customizable `Referrer policy` in `RefererMiddleware` (issue 2306)
- New `data:` URI download handler (issue 2334, fixes issue 2156)
- Log cache directory when HTTP Cache is used (issue 2611, fixes issue 2604)
- Warn users when project contains duplicate spider names (fixes issue 2181)
- `CaselessDict` now accepts `Mapping` instances and not only dicts (issue 2646)
- Media downloads, with `FilesPipelines` or `ImagesPipelines`, can now optionally handle HTTP redirects using the new `MEDIA_ALLOW_REDIRECTS` setting (issue 2616, fixes issue 2004)
- Accept non-complete responses from websites using a new `DOWNLOAD_FAIL_ON_DATALOSS` setting (issue 2590, fixes issue 2586)
- Optional pretty-printing of JSON and XML items via `FEED_EXPORT_INDENT` setting (issue 2456, fixes issue 1327)
- Allow dropping fields in `FormRequest.from_response` formdata when `None` value is passed (issue 667)
- Per-request retry times with the new `max_retry_times` meta key (issue 2642)
- `python -m scrapy` as a more explicit alternative to `scrapy` command (issue 2740)

### Bug fixes

- LinkExtractor now strips leading and trailing whitespaces from attributes (issue 2547, fixes issue 1614)
- Properly handle whitespaces in action attribute in `FormRequest` (issue 2548)
- Buffer CONNECT response bytes from proxy until all HTTP headers are received (issue 2495, fixes issue 2491)
- FTP downloader now works on Python 3, provided you use Twisted>=17.1 (issue 2599)
- Use body to choose response type after decompressing content (issue 2393, fixes issue 2145)
- Always decompress `Content-Encoding: gzip` at `HttpCompressionMiddleware` stage (issue 2391)
- Respect custom log level in `Spider.custom_settings` (issue 2581, fixes issue 1612)
- ‘make htmlview’ fix for macOS (issue 2661)
- Remove “commands” from the command list (issue 2695)
- Fix duplicate Content-Length header for POST requests with empty body (issue 2677)
- Properly cancel large downloads, i.e. above `DOWNLOAD_MAXSIZE` (issue 1616)
- ImagesPipeline: fixed processing of transparent PNG images with palette (issue 2675)

### Cleanups & Refactoring

- Tests: remove temp files and folders (issue 2570), fixed ProjectUtilsTest on OS X (issue 2569), use portable pypy for Linux on Travis CI (issue 2710)
- Separate building request from `_requests_to_follow` in CrawlSpider (issue 2562)
- Remove “Python 3 progress” badge (issue 2567)
- Add a couple more lines to `.gitignore` (issue 2557)
- Remove bumpversion prerelease configuration (issue 2159)
- Add codecov.yml file (issue 2750)
- Set context factory implementation based on Twisted version (issue 2577, fixes issue 2560)
- Add omitted `self` arguments in default project middleware template (issue 2595)
- Remove redundant `slot.add_request()` call in ExecutionEngine (issue 2617)
- Catch more specific `os.error` exception in `FSFilesStore` (issue 2644)
- Change “localhost” test server certificate (issue 2720)
- Remove unused `MEMUSAGE_REPORT` setting (issue 2576)

### Documentation

- Binary mode is required for exporters (issue 2564, fixes issue 2553)
- Mention issue with `FormRequest.from_response` due to bug in lxml (issue 2572)
- Use single quotes uniformly in templates (issue 2596)
- Document `ftp_user` and `ftp_password` meta keys (issue 2587)
- Removed section on deprecated `contrib/` (issue 2636)
- Recommend Anaconda when installing Scrapy on Windows (issue 2477, fixes issue 2475)
- FAQ: rewrite note on Python 3 support on Windows (issue 2690)
- Rearrange selector sections (issue 2705)
- Remove `__nonzero__` from `SelectorList` docs (issue 2683)
- Mention how to disable request filtering in documentation of `DUPEFILTER_CLASS` setting (issue 2714)
- Add sphinx_rtd_theme to docs setup readme (issue 2668)
- Open file in text mode in JSON item writer example (issue 2729)
- Clarify `allowed_domains` example (issue 2670)

## Scrapy 1.3.3 (2017-03-10)

### Bug fixes

- Make `SpiderLoader` raise `ImportError` again by default for missing dependencies and wrong `SPIDER_MODULES`. These exceptions were silenced as warnings since 1.3.0. A new setting is introduced to toggle between warning or exception if needed ; see `SPIDER_LOADER_WARN_ONLY` for details.

## Scrapy 1.3.2 (2017-02-13)

### Bug fixes

- Preserve request class when converting to/from dicts (utils.reqser) (issue 2510).
- Use consistent selectors for author field in tutorial (issue 2551).
- Fix TLS compatibility in Twisted 17+ (issue 2558)

## Scrapy 1.3.1 (2017-02-08)

### New features

- Support `'True'` and `'False'` string values for boolean settings (issue 2519); you can now do something like `scrapy crawl myspider -s REDIRECT_ENABLED=False`.
- Support kwargs with `response.xpath()` to use XPath variables and ad-hoc namespaces declarations ; this requires at least Parsel v1.1 (issue 2457).
- Add support for Python 3.6 (issue 2485).
- Run tests on PyPy (warning: some tests still fail, so PyPy is not supported yet).

### Bug fixes

- Enforce `DNS_TIMEOUT` setting (issue 2496).
- Fix `view` command ; it was a regression in v1.3.0 (issue 2503).
- Fix tests regarding `*_EXPIRES settings` with Files/Images pipelines (issue 2460).
- Fix name of generated pipeline class when using basic project template (issue 2466).
- Fix compatiblity with Twisted 17+ (issue 2496, issue 2528).
- Fix `scrapy.Item` inheritance on Python 3.6 (issue 2511).
- Enforce numeric values for components order in `SPIDER_MIDDLEWARES`, `DOWNLOADER_MIDDLEWARES`, `EXTENIONS` and `SPIDER_CONTRACTS` (issue 2420).

### Documentation

- Reword Code of Coduct section and upgrade to Contributor Covenant v1.4 (issue 2469).
- Clarify that passing spider arguments converts them to spider attributes (issue 2483).
- Document `formid` argument on `FormRequest.from_response()` (issue 2497).
- Add .rst extension to README files (issue 2507).
- Mention LevelDB cache storage backend (issue 2525).
- Use `yield` in sample callback code (issue 2533).
- Add note about HTML entities decoding with `.re()/.re_first()` (issue 1704).
- Typos (issue 2512, issue 2534, issue 2531).

### Cleanups

- Remove reduntant check in `MetaRefreshMiddleware` (issue 2542).
- Faster checks in `LinkExtractor` for allow/deny patterns (issue 2538).
- Remove dead code supporting old Twisted versions (issue 2544).

## Scrapy 1.3.0 (2016-12-21)

This release comes rather soon after 1.2.2 for one main reason: it was found out that releases since 0.18 up to 1.2.2 (included) use some backported code from Twisted (`scrapy.xlib.tx.*`), even if newer Twisted modules are available. Scrapy now uses `twisted.web.client` and `twisted.internet.endpoints` directly. (See also cleanups below.)

As it is a major change, we wanted to get the bug fix out quickly while not breaking any projects using the 1.2 series.

### New Features

- `MailSender` now accepts single strings as values for `to` and `cc` arguments (issue 2272)
- `scrapy fetch url`, `scrapy shell url` and `fetch(url)` inside scrapy shell now follow HTTP redirections by default (issue 2290); See `fetch` and `shell` for details.
- `HttpErrorMiddleware` now logs errors with `INFO` level instead of `DEBUG`; this is technically backward incompatible so please check your log parsers.
- By default, logger names now use a long-form path, e.g. `[scrapy.extensions.logstats]`, instead of the shorter “top-level” variant of prior releases (e.g. `[scrapy]`); this is backward incompatible if you have log parsers expecting the short logger name part. You can switch back to short logger names using `LOG_SHORT_NAMES` set to `True`.

### Dependencies & Cleanups

- Scrapy now requires Twisted >= 13.1 which is the case for many Linux distributions already.
- As a consequence, we got rid of `scrapy.xlib.tx.*` modules, which copied some of Twisted code for users stuck with an “old” Twisted version
- `ChunkedTransferMiddleware` is deprecated and removed from the default downloader middlewares.

## Scrapy 1.2.3 (2017-03-03)

- Packaging fix: disallow unsupported Twisted versions in setup.py

## Scrapy 1.2.2 (2016-12-06)

### Bug fixes

- Fix a cryptic traceback when a pipeline fails on `open_spider()` (issue 2011)
- Fix embedded IPython shell variables (fixing issue 396 that re-appeared in 1.2.0, fixed in issue 2418)
- A couple of patches when dealing with robots.txt:
  - handle (non-standard) relative sitemap URLs (issue 2390)
  - handle non-ASCII URLs and User-Agents in Python 2 (issue 2373)

### Documentation

- Document `"download_latency"` key in `Request`’s `meta` dict (issue 2033)
- Remove page on (deprecated & unsupported) Ubuntu packages from ToC (issue 2335)
- A few fixed typos (issue 2346, issue 2369, issue 2369, issue 2380) and clarifications (issue 2354, issue 2325, issue 2414)

### Other changes

- Advertize conda-forge as Scrapy’s official conda channel (issue 2387)
- More helpful error messages when trying to use `.css()` or `.xpath()` on non-Text Responses (issue 2264)
- `startproject` command now generates a sample `middlewares.py` file (issue 2335)
- Add more dependencies’ version info in `scrapy version` verbose output (issue 2404)
- Remove all `*.pyc` files from source distribution (issue 2386)

## Scrapy 1.2.1 (2016-10-21)

### Bug fixes

- Include OpenSSL’s more permissive default ciphers when establishing TLS/SSL connections (issue 2314).
- Fix “Location” HTTP header decoding on non-ASCII URL redirects (issue 2321).

### Documentation

- Fix JsonWriterPipeline example (issue 2302).
- Various notes: issue 2330 on spider names, issue 2329 on middleware methods processing order, issue 2327 on getting multi-valued HTTP headers as lists.

### Other changes

- Removed `www.` from `start_urls` in built-in spider templates (issue 2299).

## Scrapy 1.2.0 (2016-10-03)

### New Features

- New `FEED_EXPORT_ENCODING` setting to customize the encoding used when writing items to a file. This can be used to turn off `\uXXXX` escapes in JSON output. This is also useful for those wanting something else than UTF-8 for XML or CSV output (issue 2034).
- `startproject` command now supports an optional destination directory to override the default one based on the project name (issue 2005).
- New `SCHEDULER_DEBUG` setting to log requests serialization failures (issue 1610).
- JSON encoder now supports serialization of `set` instances (issue 2058).
- Interpret `application/json-amazonui-streaming` as `TextResponse` (issue 1503).
- `scrapy` is imported by default when using shell tools (`shell`, inspect_response) (issue 2248).

### Bug fixes

- DefaultRequestHeaders middleware now runs before UserAgent middleware (issue 2088). Warning: this is technically backward incompatible, though we consider this a bug fix.
- HTTP cache extension and plugins that use the `.scrapy` data directory now work outside projects (issue 1581). Warning: this is technically backward incompatible, though we consider this a bug fix.
- `Selector` does not allow passing both `response` and `text` anymore (issue 2153).
- Fixed logging of wrong callback name with `scrapy parse` (issue 2169).
- Fix for an odd gzip decompression bug (issue 1606).
- Fix for selected callbacks when using `CrawlSpider` with `scrapy parse` (issue 2225).
- Fix for invalid JSON and XML files when spider yields no items (issue 872).
- Implement `flush()` fpr `StreamLogger` avoiding a warning in logs (issue 2125).

### Refactoring

- `canonicalize_url` has been moved to w3lib.url (issue 2168).

### Tests & Requirements

Scrapy’s new requirements baseline is Debian 8 “Jessie”. It was previously Ubuntu 12.04 Precise. What this means in practice is that we run continuous integration tests with these (main) packages versions at a minimum: Twisted 14.0, pyOpenSSL 0.14, lxml 3.4.

Scrapy may very well work with older versions of these packages (the code base still has switches for older Twisted versions for example) but it is not guaranteed (because it’s not tested anymore).

### Documentation

- Grammar fixes: issue 2128, issue 1566.
- Download stats badge removed from README (issue 2160).
- New scrapy architecture diagram (issue 2165).
- Updated `Response` parameters documentation (issue 2197).
- Reworded misleading `RANDOMIZE_DOWNLOAD_DELAY` description (issue 2190).
- Add StackOverflow as a support channel (issue 2257).

## Scrapy 1.1.4 (2017-03-03)

- Packaging fix: disallow unsupported Twisted versions in setup.py

## Scrapy 1.1.3 (2016-09-22)

### Bug fixes

- Class attributes for subclasses of `ImagesPipeline` and `FilesPipeline` work as they did before 1.1.1 (issue 2243, fixes issue 2198)

### Documentation

- Overview and tutorial rewritten to use http://toscrape.com websites (issue 2236, issue 2249, issue 2252).

## Scrapy 1.1.2 (2016-08-18)

### Bug fixes

- Introduce a missing `IMAGES_STORE_S3_ACL` setting to override the default ACL policy in `ImagesPipeline` when uploading images to S3 (note that default ACL policy is “private” – instead of “public-read” – since Scrapy 1.1.0)
- `IMAGES_EXPIRES` default value set back to 90 (the regression was introduced in 1.1.1)

## Scrapy 1.1.1 (2016-07-13)

### Bug fixes

- Add “Host” header in CONNECT requests to HTTPS proxies (issue 2069)
- Use response `body` when choosing response class (issue 2001, fixes issue 2000)
- Do not fail on canonicalizing URLs with wrong netlocs (issue 2038, fixes issue 2010)
- a few fixes for `HttpCompressionMiddleware` (and `SitemapSpider`):
  - Do not decode HEAD responses (issue 2008, fixes issue 1899)
  - Handle charset parameter in gzip Content-Type header (issue 2050, fixes issue 2049)
  - Do not decompress gzip octet-stream responses (issue 2065, fixes issue 2063)
- Catch (and ignore with a warning) exception when verifying certificate against IP-address hosts (issue 2094, fixes issue 2092)
- Make `FilesPipeline` and `ImagesPipeline` backward compatible again regarding the use of legacy class attributes for customization (issue 1989, fixes issue 1985)

### New features

- Enable genspider command outside project folder (issue 2052)
- Retry HTTPS CONNECT `TunnelError` by default (issue 1974)

### Documentation

- `FEED_TEMPDIR` setting at lexicographical position (commit 9b3c72c)
- Use idiomatic `.extract_first()` in overview (issue 1994)
- Update years in copyright notice (commit c2c8036)
- Add information and example on errbacks (issue 1995)
- Use “url” variable in downloader middleware example (issue 2015)
- Grammar fixes (issue 2054, issue 2120)
- New FAQ entry on using BeautifulSoup in spider callbacks (issue 2048)
- Add notes about scrapy not working on Windows with Python 3 (issue 2060)
- Encourage complete titles in pull requests (issue 2026)

### Tests

- Upgrade py.test requirement on Travis CI and Pin pytest-cov to 2.2.1 (issue 2095)

## Scrapy 1.1.0 (2016-05-11)

This 1.1 release brings a lot of interesting features and bug fixes:

- Scrapy 1.1 has beta Python 3 support (requires Twisted >= 15.5). See Beta Python 3 Support for more details and some limitations.
- Hot new features:
  - Item loaders now support nested loaders (issue 1467).
  - `FormRequest.from_response` improvements (issue 1382, issue 1137).
  - Added setting `AUTOTHROTTLE_TARGET_CONCURRENCY` and improved AutoThrottle docs (issue 1324).
  - Added `response.text` to get body as unicode (issue 1730).
  - Anonymous S3 connections (issue 1358).
  - Deferreds in downloader middlewares (issue 1473). This enables better robots.txt handling (issue 1471).
  - HTTP caching now follows RFC2616 more closely, added settings `HTTPCACHE_ALWAYS_STORE` and `HTTPCACHE_IGNORE_RESPONSE_CACHE_CONTROLS` (issue 1151).
  - Selectors were extracted to the parsel library (issue 1409). This means you can use Scrapy Selectors without Scrapy and also upgrade the selectors engine without needing to upgrade Scrapy.
  - HTTPS downloader now does TLS protocol negotiation by default, instead of forcing TLS 1.0. You can also set the SSL/TLS method using the new `DOWNLOADER_CLIENT_TLS_METHOD`.
- These bug fixes may require your attention:
  - Don’t retry bad requests (HTTP 400) by default (issue 1289). If you need the old behavior, add `400` to `RETRY_HTTP_CODES`.
  - Fix shell files argument handling (issue 1710, issue 1550). If you try `scrapy shell index.html` it will try to load the URL http://index.html, use `scrapy shell ./index.html` to load a local file.
  - Robots.txt compliance is now enabled by default for newly-created projects (issue 1724). Scrapy will also wait for robots.txt to be downloaded before proceeding with the crawl (issue 1735). If you want to disable this behavior, update `ROBOTSTXT_OBEY` in `settings.py` file after creating a new project.
  - Exporters now work on unicode, instead of bytes by default (issue 1080). If you use `PythonItemExporter`, you may want to update your code to disable binary mode which is now deprecated.
  - Accept XML node names containing dots as valid (issue 1533).
  - When uploading files or images to S3 (with `FilesPipeline` or `ImagesPipeline`), the default ACL policy is now “private” instead of “public” Warning: backward incompatible!. You can use `FILES_STORE_S3_ACL` to change it.
  - We’ve reimplemented `canonicalize_url()` for more correct output, especially for URLs with non-ASCII characters (issue 1947). This could change link extractors output compared to previous scrapy versions. This may also invalidate some cache entries you could still have from pre-1.1 runs. Warning: backward incompatible!.

Keep reading for more details on other improvements and bug fixes.

### Beta Python 3 Support

We have been hard at work to make Scrapy run on Python 3. As a result, now you can run spiders on Python 3.3, 3.4 and 3.5 (Twisted >= 15.5 required). Some features are still missing (and some may never be ported).

Almost all builtin extensions/middlewares are expected to work. However, we are aware of some limitations in Python 3:

- Scrapy does not work on Windows with Python 3
- Sending emails is not supported
- FTP download handler is not supported
- Telnet console is not supported

### Additional New Features and Enhancements

- Scrapy now has a Code of Conduct (issue 1681).
- Command line tool now has completion for zsh (issue 934).
- Improvements to `scrapy shell`:
  - Support for bpython and configure preferred Python shell via `SCRAPY_PYTHON_SHELL` (issue 1100, issue 1444).
  - Support URLs without scheme (issue 1498) Warning: backward incompatible!
  - Bring back support for relative file path (issue 1710, issue 1550).
- Added `MEMUSAGE_CHECK_INTERVAL_SECONDS` setting to change default check interval (issue 1282).
- Download handlers are now lazy-loaded on first request using their scheme (issue 1390, issue 1421).
- HTTPS download handlers do not force TLS 1.0 anymore; instead, OpenSSL’s `SSLv23_method()/TLS_method()` is used allowing to try negotiating with the remote hosts the highest TLS protocol version it can (issue 1794, issue 1629).
- `RedirectMiddleware` now skips the status codes from `handle_httpstatus_list` on spider attribute or in `Request`’s `meta` key (issue 1334, issue 1364, issue 1447).
- Form submission:
  - now works with `<button>` elements too (issue 1469).
  - an empty string is now used for submit buttons without a value (issue 1472)
- Dict-like settings now have per-key priorities (issue 1135, issue 1149 and issue 1586).
- Sending non-ASCII emails (issue 1662)
- `CloseSpider` and `SpiderState` extensions now get disabled if no relevant setting is set (issue 1723, issue 1725).
- Added method `ExecutionEngine.close` (issue 1423).
- Added method `CrawlerRunner.create_crawler` (issue 1528).
- Scheduler priority queue can now be customized via `SCHEDULER_PRIORITY_QUEUE` (issue 1822).
- `.pps` links are now ignored by default in link extractors (issue 1835).
- temporary data folder for FTP and S3 feed storages can be customized using a new `FEED_TEMPDIR` setting (issue 1847).
- `FilesPipeline` and `ImagesPipeline` settings are now instance attributes instead of class attributes, enabling spider-specific behaviors (issue 1891).
- `JsonItemExporter` now formats opening and closing square brackets on their own line (first and last lines of output file) (issue 1950).
- If available, `botocore` is used for `S3FeedStorage`, `S3DownloadHandler` and `S3FilesStore` (issue 1761, issue 1883).
- Tons of documentation updates and related fixes (issue 1291, issue 1302, issue 1335, issue 1683, issue 1660, issue 1642, issue 1721, issue 1727, issue 1879).
- Other refactoring, optimizations and cleanup (issue 1476, issue 1481, issue 1477, issue 1315, issue 1290, issue 1750, issue 1881).

### Deprecations and Removals

- Added `to_bytes` and `to_unicode`, deprecated `str_to_unicode` and `unicode_to_str` functions (issue 778).
- `binary_is_text` is introduced, to replace use of `isbinarytext` (but with inverse return value) (issue 1851)
- The `optional_features` set has been removed (issue 1359).
- The `--lsprof` command line option has been removed (issue 1689). Warning: backward incompatible, but doesn’t break user code.
- The following datatypes were deprecated (issue 1720):
  - `scrapy.utils.datatypes.MultiValueDictKeyError`
  - `scrapy.utils.datatypes.MultiValueDict`
  - `scrapy.utils.datatypes.SiteNode`
- The previously bundled `scrapy.xlib.pydispatch` library was deprecated and replaced by pydispatcher.

### Relocations

- `telnetconsole` was relocated to `extensions/` (issue 1524).
  - Note: telnet is not enabled on Python 3 (https://github.com/scrapy/scrapy/pull/1524#issuecomment-146985595)

### Bugfixes

- Scrapy does not retry requests that got a `HTTP 400 Bad Request` response anymore (issue 1289). Warning: backward incompatible!
- Support empty password for http_proxy config (issue 1274).
- Interpret `application/x-json` as `TextResponse` (issue 1333).
- Support link rel attribute with multiple values (issue 1201).
- Fixed `scrapy.http.FormRequest.from_response` when there is a `<base>` tag (issue 1564).
- Fixed `TEMPLATES_DIR` handling (issue 1575).
- Various `FormRequest` fixes (issue 1595, issue 1596, issue 1597).
- Makes `_monkeypatches` more robust (issue 1634).
- Fixed bug on `XMLItemExporter` with non-string fields in items (issue 1738).
- Fixed startproject command in OS X (issue 1635).
- Fixed PythonItemExporter and CSVExporter for non-string item types (issue 1737).
- Various logging related fixes (issue 1294, issue 1419, issue 1263, issue 1624, issue 1654, issue 1722, issue 1726 and issue 1303).
- Fixed bug in `utils.template.render_templatefile()` (issue 1212).
- sitemaps extraction from `robots.txt` is now case-insensitive (issue 1902).
- HTTPS+CONNECT tunnels could get mixed up when using multiple proxies to same remote host (issue 1912).

## Scrapy 1.0.7 (2017-03-03)

- Packaging fix: disallow unsupported Twisted versions in setup.py

## Scrapy 1.0.6 (2016-05-04)

- FIX: RetryMiddleware is now robust to non-standard HTTP status codes (issue 1857)
- FIX: Filestorage HTTP cache was checking wrong modified time (issue 1875)
- DOC: Support for Sphinx 1.4+ (issue 1893)
- DOC: Consistency in selectors examples (issue 1869)

## Scrapy 1.0.5 (2016-02-04)

- FIX: [Backport] Ignore bogus links in LinkExtractors (fixes issue 907, commit 108195e)
- TST: Changed buildbot makefile to use ‘pytest’ (commit 1f3d90a)
- DOC: Fixed typos in tutorial and media-pipeline (commit 808a9ea and commit 803bd87)
- DOC: Add AjaxCrawlMiddleware to DOWNLOADER_MIDDLEWARES_BASE in settings docs (commit aa94121)

## Scrapy 1.0.4 (2015-12-30)

- Ignoring xlib/tx folder, depending on Twisted version. (commit 7dfa979)
- Run on new travis-ci infra (commit 6e42f0b)
- Spelling fixes (commit 823a1cc)
- escape nodename in xmliter regex (commit da3c155)
- test xml nodename with dots (commit 4418fc3)
- TST don’t use broken Pillow version in tests (commit a55078c)
- disable log on version command. closes #1426 (commit 86fc330)
- disable log on startproject command (commit db4c9fe)
- Add PyPI download stats badge (commit df2b944)
- don’t run tests twice on Travis if a PR is made from a scrapy/scrapy branch (commit a83ab41)
- Add Python 3 porting status badge to the README (commit 73ac80d)
- fixed RFPDupeFilter persistence (commit 97d080e)
- TST a test to show that dupefilter persistence is not working (commit 97f2fb3)
- explicit close file on file:// scheme handler (commit d9b4850)
- Disable dupefilter in shell (commit c0d0734)
- DOC: Add captions to toctrees which appear in sidebar (commit aa239ad)
- DOC Removed pywin32 from install instructions as it’s already declared as dependency. (commit 10eb400)
- Added installation notes about using Conda for Windows and other OSes. (commit 1c3600a)
- Fixed minor grammar issues. (commit 7f4ddd5)
- fixed a typo in the documentation. (commit b71f677)
- Version 1 now exists (commit 5456c0e)
- fix another invalid xpath error (commit 0a1366e)
- fix ValueError: Invalid XPath: //div/[id=”not-exists”]/text() on selectors.rst (commit ca8d60f)
- Typos corrections (commit 7067117)
- fix typos in downloader-middleware.rst and exceptions.rst, middlware -> middleware (commit 32f115c)
- Add note to ubuntu install section about debian compatibility (commit 23fda69)
- Replace alternative OSX install workaround with virtualenv (commit 98b63ee)
- Reference Homebrew’s homepage for installation instructions (commit 1925db1)
- Add oldest supported tox version to contributing docs (commit 5d10d6d)
- Note in install docs about pip being already included in python>=2.7.9 (commit 85c980e)
- Add non-python dependencies to Ubuntu install section in the docs (commit fbd010d)
- Add OS X installation section to docs (commit d8f4cba)
- DOC(ENH): specify path to rtd theme explicitly (commit de73b1a)
- minor: scrapy.Spider docs grammar (commit 1ddcc7b)
- Make common practices sample code match the comments (commit 1b85bcf)
- nextcall repetitive calls (heartbeats). (commit 55f7104)
- Backport fix compatibility with Twisted 15.4.0 (commit b262411)
- pin pytest to 2.7.3 (commit a6535c2)
- Merge pull request #1512 from mgedmin/patch-1 (commit 8876111)
- Merge pull request #1513 from mgedmin/patch-2 (commit 5d4daf8)
- Typo (commit f8d0682)
- Fix list formatting (commit 5f83a93)
- fix scrapy squeue tests after recent changes to queuelib (commit 3365c01)
- Merge pull request #1475 from rweindl/patch-1 (commit 2d688cd)
- Update tutorial.rst (commit fbc1f25)
- Merge pull request #1449 from rhoekman/patch-1 (commit 7d6538c)
- Small grammatical change (commit 8752294)
- Add openssl version to version command (commit 13c45ac)

## Scrapy 1.0.3 (2015-08-11)

- add service_identity to scrapy install_requires (commit cbc2501)
- Workaround for travis#296 (commit 66af9cd)

## Scrapy 1.0.2 (2015-08-06)

- Twisted 15.3.0 does not raises PicklingError serializing lambda functions (commit b04dd7d)
- Minor method name fix (commit 6f85c7f)
- minor: scrapy.Spider grammar and clarity (commit 9c9d2e0)
- Put a blurb about support channels in CONTRIBUTING (commit c63882b)
- Fixed typos (commit a9ae7b0)
- Fix doc reference. (commit 7c8a4fe)

## Scrapy 1.0.1 (2015-07-01)

- Unquote request path before passing to FTPClient, it already escape paths (commit cc00ad2)
- include tests/ to source distribution in MANIFEST.in (commit eca227e)
- DOC Fix SelectJmes documentation (commit b8567bc)
- DOC Bring Ubuntu and Archlinux outside of Windows subsection (commit 392233f)
- DOC remove version suffix from ubuntu package (commit 5303c66)
- DOC Update release date for 1.0 (commit c89fa29)

## Scrapy 1.0.0 (2015-06-19)

You will find a lot of new features and bugfixes in this major release. Make sure to check our updated overview to get a glance of some of the changes, along with our brushed tutorial.

### Support for returning dictionaries in spiders

Declaring and returning Scrapy Items is no longer necessary to collect the scraped data from your spider, you can now return explicit dictionaries instead.

Classic version

    class MyItem(scrapy.Item):
        url = scrapy.Field()

    class MySpider(scrapy.Spider):
        def parse(self, response):
            return MyItem(url=response.url)

New version

    class MySpider(scrapy.Spider):
        def parse(self, response):
            return {'url': response.url}

### Per-spider settings (GSoC 2014)

Last Google Summer of Code project accomplished an important redesign of the mechanism used for populating settings, introducing explicit priorities to override any given setting. As an extension of that goal, we included a new level of priority for settings that act exclusively for a single spider, allowing them to redefine project settings.

Start using it by defining a `custom_settings` class variable in your spider:

    class MySpider(scrapy.Spider):
        custom_settings = {
            "DOWNLOAD_DELAY": 5.0,
            "RETRY_ENABLED": False,
        }

Read more about settings population: Settings

### Python Logging

Scrapy 1.0 has moved away from Twisted logging to support Python built in’s as default logging system. We’re maintaining backward compatibility for most of the old custom interface to call logging functions, but you’ll get warnings to switch to the Python logging API entirely.

Old version

    from scrapy import log
    log.msg('MESSAGE', log.INFO)

New version

    import logging
    logging.info('MESSAGE')

Logging with spiders remains the same, but on top of the `log()` method you’ll have access to a custom `logger` created for the spider to issue log events:

    class MySpider(scrapy.Spider):
        def parse(self, response):
            self.logger.info('Response received')

Read more in the logging documentation: Logging

### Crawler API refactoring (GSoC 2014)

Another milestone for last Google Summer of Code was a refactoring of the internal API, seeking a simpler and easier usage. Check new core interface in: Core API

A common situation where you will face these changes is while running Scrapy from scripts. Here’s a quick example of how to run a Spider manually with the new API:

    from scrapy.crawler import CrawlerProcess

    process = CrawlerProcess({
        'USER_AGENT': 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)'
    })
    process.crawl(MySpider)
    process.start()

Bear in mind this feature is still under development and its API may change until it reaches a stable status.

See more examples for scripts running Scrapy: Common Practices

### Module Relocations

There’s been a large rearrangement of modules trying to improve the general structure of Scrapy. Main changes were separating various subpackages into new projects and dissolving both `scrapy.contrib` and `scrapy.contrib_exp` into top level packages. Backward compatibility was kept among internal relocations, while importing deprecated modules expect warnings indicating their new place.

#### Full list of relocations

Outsourced packages

Note

These extensions went through some minor changes, e.g. some setting names were changed. Please check the documentation in each new repository to get familiar with the new usage.

Old location | New location
--- | ---
scrapy.commands.deploy | scrapyd-client (See other alternatives here: Deploying Spiders)
scrapy.contrib.djangoitem | scrapy-djangoitem
scrapy.webservice | scrapy-jsonrpc

`scrapy.contrib_exp` and `scrapy.contrib` dissolutions

Old location | New location
--- | ---
scrapy.contrib_exp.downloadermiddleware.decompression | scrapy.downloadermiddlewares.decompression
scrapy.contrib_exp.iterators | scrapy.utils.iterators
scrapy.contrib.downloadermiddleware | scrapy.downloadermiddlewares
scrapy.contrib.exporter | scrapy.exporters
scrapy.contrib.linkextractors | scrapy.linkextractors
scrapy.contrib.loader | scrapy.loader
scrapy.contrib.loader.processor | scrapy.loader.processors
scrapy.contrib.pipeline | scrapy.pipelines
scrapy.contrib.spidermiddleware | scrapy.spidermiddlewares
scrapy.contrib.spiders | scrapy.spiders

- scrapy.contrib.closespider
- scrapy.contrib.corestats
- scrapy.contrib.debug
- scrapy.contrib.feedexport
- scrapy.contrib.httpcache
- scrapy.contrib.logstats
- scrapy.contrib.memdebug
- scrapy.contrib.memusage
- scrapy.contrib.spiderstate
- scrapy.contrib.statsmailer
- scrapy.contrib.throttle

scrapy.extensions.*

Plural renames and Modules unification

Old location | New location
--- | ---
scrapy.command | scrapy.commands
scrapy.dupefilter | scrapy.dupefilters
scrapy.linkextractor | scrapy.linkextractors
scrapy.spider | scrapy.spiders
scrapy.squeue | scrapy.squeues
scrapy.statscol | scrapy.statscollectors
scrapy.utils.decorator | scrapy.utils.decorators

Class renames

Old location | New location
--- | ---
scrapy.spidermanager.SpiderManager | scrapy.spiderloader.SpiderLoader

Settings renames

Old location | New location
--- | ---
SPIDER_MANAGER_CLASS | SPIDER_LOADER_CLASS

### Changelog

New Features and Enhancements

- Python logging (issue 1060, issue 1235, issue 1236, issue 1240, issue 1259, issue 1278, issue 1286)
- FEED_EXPORT_FIELDS option (issue 1159, issue 1224)
- Dns cache size and timeout options (issue 1132)
- support namespace prefix in xmliter_lxml (issue 963)
- Reactor threadpool max size setting (issue 1123)
- Allow spiders to return dicts. (issue 1081)
- Add Response.urljoin() helper (issue 1086)
- look in ~/.config/scrapy.cfg for user config (issue 1098)
- handle TLS SNI (issue 1101)
- Selectorlist extract first (issue 624, issue 1145)
- Added JmesSelect (issue 1016)
- add gzip compression to filesystem http cache backend (issue 1020)
- CSS support in link extractors (issue 983)
- httpcache dont_cache meta #19 #689 (issue 821)
- add signal to be sent when request is dropped by the scheduler (issue 961)
- avoid download large response (issue 946)
- Allow to specify the quotechar in CSVFeedSpider (issue 882)
- Add referer to “Spider error processing” log message (issue 795)
- process robots.txt once (issue 896)
- GSoC Per-spider settings (issue 854)
- Add project name validation (issue 817)
- GSoC API cleanup (issue 816, issue 1128, issue 1147, issue 1148, issue 1156, issue 1185, issue 1187, issue 1258, issue 1268, issue 1276, issue 1285, issue 1284)
- Be more responsive with IO operations (issue 1074 and issue 1075)
- Do leveldb compaction for httpcache on closing (issue 1297)

Deprecations and Removals

- Deprecate htmlparser link extractor (issue 1205)
- remove deprecated code from FeedExporter (issue 1155)
- a leftover for.15 compatibility (issue 925)
- drop support for CONCURRENT_REQUESTS_PER_SPIDER (issue 895)
- Drop old engine code (issue 911)
- Deprecate SgmlLinkExtractor (issue 777)

Relocations

- Move exporters/__init__.py to exporters.py (issue 1242)
- Move base classes to their packages (issue 1218, issue 1233)
- Module relocation (issue 1181, issue 1210)
- rename SpiderManager to SpiderLoader (issue 1166)
- Remove djangoitem (issue 1177)
- remove scrapy deploy command (issue 1102)
- dissolve contrib_exp (issue 1134)
- Deleted bin folder from root, fixes #913 (issue 914)
- Remove jsonrpc based webservice (issue 859)
- Move Test cases under project root dir (issue 827, issue 841)
- Fix backward incompatibility for relocated paths in settings (issue 1267)

Documentation

- CrawlerProcess documentation (issue 1190)
- Favoring web scraping over screen scraping in the descriptions (issue 1188)
- Some improvements for Scrapy tutorial (issue 1180)
- Documenting Files Pipeline together with Images Pipeline (issue 1150)
- deployment docs tweaks (issue 1164)
- Added deployment section covering scrapyd-deploy and shub (issue 1124)
- Adding more settings to project template (issue 1073)
- some improvements to overview page (issue 1106)
- Updated link in docs/topics/architecture.rst (issue 647)
- DOC reorder topics (issue 1022)
- updating list of Request.meta special keys (issue 1071)
- DOC document download_timeout (issue 898)
- DOC simplify extension docs (issue 893)
- Leaks docs (issue 894)
- DOC document from_crawler method for item pipelines (issue 904)
- Spider_error doesn’t support deferreds (issue 1292)
- Corrections & Sphinx related fixes (issue 1220, issue 1219, issue 1196, issue 1172, issue 1171, issue 1169, issue 1160, issue 1154, issue 1127, issue 1112, issue 1105, issue 1041, issue 1082, issue 1033, issue 944, issue 866, issue 864, issue 796, issue 1260, issue 1271, issue 1293, issue 1298)

Bugfixes

- Item multi inheritance fix (issue 353, issue 1228)
- ItemLoader.load_item: iterate over copy of fields (issue 722)
- Fix Unhandled error in Deferred (RobotsTxtMiddleware) (issue 1131, issue 1197)
- Force to read DOWNLOAD_TIMEOUT as int (issue 954)
- scrapy.utils.misc.load_object should print full traceback (issue 902)
- Fix bug for “.local” host name (issue 878)
- Fix for Enabled extensions, middlewares, pipelines info not printed anymore (issue 879)
- fix dont_merge_cookies bad behaviour when set to false on meta (issue 846)

Python 3 In Progress Support

- disable scrapy.telnet if twisted.conch is not available (issue 1161)
- fix Python 3 syntax errors in ajaxcrawl.py (issue 1162)
- more python3 compatibility changes for urllib (issue 1121)
- assertItemsEqual was renamed to assertCountEqual in Python 3. (issue 1070)
- Import unittest.mock if available. (issue 1066)
- updated deprecated cgi.parse_qsl to use six’s parse_qsl (issue 909)
- Prevent Python 3 port regressions (issue 830)
- PY3: use MutableMapping for python 3 (issue 810)
- PY3: use six.BytesIO and six.moves.cStringIO (issue 803)
- PY3: fix xmlrpclib and email imports (issue 801)
- PY3: use six for robotparser and urlparse (issue 800)
- PY3: use six.iterkeys, six.iteritems, and tempfile (issue 799)
- PY3: fix has_key and use six.moves.configparser (issue 798)
- PY3: use six.moves.cPickle (issue 797)
- PY3 make it possible to run some tests in Python3 (issue 776)

Tests

- remove unnecessary lines from py3-ignores (issue 1243)
- Fix remaining warnings from pytest while collecting tests (issue 1206)
- Add docs build to travis (issue 1234)
- TST don’t collect tests from deprecated modules. (issue 1165)
- install service_identity package in tests to prevent warnings (issue 1168)
- Fix deprecated settings API in tests (issue 1152)
- Add test for webclient with POST method and no body given (issue 1089)
- py3-ignores.txt supports comments (issue 1044)
- modernize some of the asserts (issue 835)
- selector.__repr__ test (issue 779)

Code refactoring

- CSVFeedSpider cleanup: use iterate_spider_output (issue 1079)
- remove unnecessary check from scrapy.utils.spider.iter_spider_output (issue 1078)
- Pydispatch pep8 (issue 992)
- Removed unused ‘load=False’ parameter from walk_modules() (issue 871)
- For consistency, use `job_dir` helper in `SpiderState` extension. (issue 805)
- rename “sflo” local variables to less cryptic “log_observer” (issue 775)

## Scrapy 0.24.6 (2015-04-20)

- encode invalid xpath with unicode_escape under PY2 (commit 07cb3e5)
- fix IPython shell scope issue and load IPython user config (commit 2c8e573)
- Fix small typo in the docs (commit d694019)
- Fix small typo (commit f92fa83)
- Converted sel.xpath() calls to response.xpath() in Extracting the data (commit c2c6d15)

## Scrapy 0.24.5 (2015-02-25)

- Support new _getEndpoint Agent signatures on Twisted 15.0.0 (commit 540b9bc)
- DOC a couple more references are fixed (commit b4c454b)
- DOC fix a reference (commit e3c1260)
- t.i.b.ThreadedResolver is now a new-style class (commit 9e13f42)
- S3DownloadHandler: fix auth for requests with quoted paths/query params (commit cdb9a0b)
- fixed the variable types in mailsender documentation (commit bb3a848)
- Reset items_scraped instead of item_count (commit edb07a4)
- Tentative attention message about what document to read for contributions (commit 7ee6f7a)
- mitmproxy 0.10.1 needs netlib 0.10.1 too (commit 874fcdd)
- pin mitmproxy 0.10.1 as >0.11 does not work with tests (commit c6b21f0)
- Test the parse command locally instead of against an external url (commit c3a6628)
- Patches Twisted issue while closing the connection pool on HTTPDownloadHandler (commit d0bf957)
- Updates documentation on dynamic item classes. (commit eeb589a)
- Merge pull request #943 from Lazar-T/patch-3 (commit 5fdab02)
- typo (commit b0ae199)
- pywin32 is required by Twisted. closes #937 (commit 5cb0cfb)
- Update install.rst (commit 781286b)
- Merge pull request #928 from Lazar-T/patch-1 (commit b415d04)
- comma instead of fullstop (commit 627b9ba)
- Merge pull request #885 from jsma/patch-1 (commit de909ad)
- Update request-response.rst (commit 3f3263d)
- SgmlLinkExtractor - fix for parsing <area> tag with Unicode present (commit 49b40f0)

## Scrapy 0.24.4 (2014-08-09)

- pem file is used by mockserver and required by scrapy bench (commit 5eddc68)
- scrapy bench needs scrapy.tests* (commit d6cb999)

## Scrapy 0.24.3 (2014-08-09)

- no need to waste travis-ci time on py3 for 0.24 (commit 8e080c1)
- Update installation docs (commit 1d0c096)
- There is a trove classifier for Scrapy framework! (commit 4c701d7)
- update other places where w3lib version is mentioned (commit d109c13)
- Update w3lib requirement to 1.8.0 (commit 39d2ce5)
- Use w3lib.html.replace_entities() (remove_entities() is deprecated) (commit 180d3ad)
- set zip_safe=False (commit a51ee8b)
- do not ship tests package (commit ee3b371)
- scrapy.bat is not needed anymore (commit c3861cf)
- Modernize setup.py (commit 362e322)
- headers can not handle non-string values (commit 94a5c65)
- fix ftp test cases (commit a274a7f)
- The sum up of travis-ci builds are taking like 50min to complete (commit ae1e2cc)
- Update shell.rst typo (commit e49c96a)
- removes weird indentation in the shell results (commit 1ca489d)
- improved explanations, clarified blog post as source, added link for XPath string functions in the spec (commit 65c8f05)
- renamed UserTimeoutError and ServerTimeouterror #583 (commit 037f6ab)
- adding some xpath tips to selectors docs (commit 2d103e0)
- fix tests to account for https://github.com/scrapy/w3lib/pull/23 (commit f8d366a)
- get_func_args maximum recursion fix #728 (commit 81344ea)
- Updated input/ouput processor example according to #560. (commit f7c4ea8)
- Fixed Python syntax in tutorial. (commit db59ed9)
- Add test case for tunneling proxy (commit f090260)
- Bugfix for leaking Proxy-Authorization header to remote host when using tunneling (commit d8793af)
- Extract links from XHTML documents with MIME-Type “application/xml” (commit ed1f376)
- Merge pull request #793 from roysc/patch-1 (commit 91a1106)
- Fix typo in commands.rst (commit 743e1e2)
- better testcase for settings.overrides.setdefault (commit e22daaf)
- Using CRLF as line marker according to http 1.1 definition (commit 5ec430b)

## Scrapy 0.24.2 (2014-07-08)

- Use a mutable mapping to proxy deprecated settings.overrides and settings.defaults attribute (commit e5e8133)
- there is not support for python3 yet (commit 3cd6146)
- Update python compatible version set to debian packages (commit fa5d76b)
- DOC fix formatting in release notes (commit c6a9e20)

## Scrapy 0.24.1 (2014-06-27)

- Fix deprecated CrawlerSettings and increase backward compatibility with .defaults attribute (commit 8e3f20a)

## Scrapy 0.24.0 (2014-06-26)

### Enhancements

- Improve Scrapy top-level namespace (issue 494, issue 684)
- Add selector shortcuts to responses (issue 554, issue 690)
- Add new lxml based LinkExtractor to replace unmantained SgmlLinkExtractor (issue 559, issue 761, issue 763)
- Cleanup settings API - part of per-spider settings GSoC project (issue 737)
- Add UTF8 encoding header to templates (issue 688, issue 762)
- Telnet console now binds to 127.0.0.1 by default (issue 699)
- Update debian/ubuntu install instructions (issue 509, issue 549)
- Disable smart strings in lxml XPath evaluations (issue 535)
- Restore filesystem based cache as default for http cache middleware (issue 541, issue 500, issue 571)
- Expose current crawler in Scrapy shell (issue 557)
- Improve testsuite comparing CSV and XML exporters (issue 570)
- New `offsite/filtered` and `offsite/domains` stats (issue 566)
- Support process_links as generator in CrawlSpider (issue 555)
- Verbose logging and new stats counters for DupeFilter (issue 553)
- Add a mimetype parameter to `MailSender.send()` (issue 602)
- Generalize file pipeline log messages (issue 622)
- Replace unencodeable codepoints with html entities in SGMLLinkExtractor (issue 565)
- Converted SEP documents to rst format (issue 629, issue 630, issue 638, issue 632, issue 636, issue 640, issue 635, issue 634, issue 639, issue 637, issue 631, issue 633, issue 641, issue 642)
- Tests and docs for clickdata’s nr index in FormRequest (issue 646, issue 645)
- Allow to disable a downloader handler just like any other component (issue 650)
- Log when a request is discarded after too many redirections (issue 654)
- Log error responses if they are not handled by spider callbacks (issue 612, issue 656)
- Add content-type check to http compression mw (issue 193, issue 660)
- Run pypy tests using latest pypi from ppa (issue 674)
- Run test suite using pytest instead of trial (issue 679)
- Build docs and check for dead links in tox environment (issue 687)
- Make scrapy.version_info a tuple of integers (issue 681, issue 692)
- Infer exporter’s output format from filename extensions (issue 546, issue 659, issue 760)
- Support case-insensitive domains in `url_is_from_any_domain()` (issue 693)
- Remove pep8 warnings in project and spider templates (issue 698)
- Tests and docs for `request_fingerprint` function (issue 597)
- Update SEP-19 for GSoC project `per-spider settings` (issue 705)
- Set exit code to non-zero when contracts fails (issue 727)
- Add a setting to control what class is instanciated as Downloader component (issue 738)
- Pass response in `item_dropped` signal (issue 724)
- Improve `scrapy check` contracts command (issue 733, issue 752)
- Document `spider.closed()` shortcut (issue 719)
- Document `request_scheduled` signal (issue 746)
- Add a note about reporting security issues (issue 697)
- Add LevelDB http cache storage backend (issue 626, issue 500)
- Sort spider list output of `scrapy list` command (issue 742)
- Multiple documentation enhancemens and fixes (issue 575, issue 587, issue 590, issue 596, issue 610, issue 617, issue 618, issue 627, issue 613, issue 643, issue 654, issue 675, issue 663, issue 711, issue 714)

### Bugfixes

- Encode unicode URL value when creating Links in RegexLinkExtractor (issue 561)
- Ignore None values in ItemLoader processors (issue 556)
- Fix link text when there is an inner tag in SGMLLinkExtractor and HtmlParserLinkExtractor (issue 485, issue 574)
- Fix wrong checks on subclassing of deprecated classes (issue 581, issue 584)
- Handle errors caused by inspect.stack() failures (issue 582)
- Fix a reference to unexistent engine attribute (issue 593, issue 594)
- Fix dynamic itemclass example usage of type() (issue 603)
- Use lucasdemarchi/codespell to fix typos (issue 628)
- Fix default value of attrs argument in SgmlLinkExtractor to be tuple (issue 661)
- Fix XXE flaw in sitemap reader (issue 676)
- Fix engine to support filtered start requests (issue 707)
- Fix offsite middleware case on urls with no hostnames (issue 745)
- Testsuite doesn’t require PIL anymore (issue 585)

## Scrapy 0.22.2 (released 2014-02-14)

- fix a reference to unexistent engine.slots. closes #593 (commit 13c099a)
- downloaderMW doc typo (spiderMW doc copy remnant) (commit 8ae11bf)
- Correct typos (commit 1346037)

## Scrapy 0.22.1 (released 2014-02-08)

- localhost666 can resolve under certain circumstances (commit 2ec2279)
- test inspect.stack failure (commit cc3eda3)
- Handle cases when inspect.stack() fails (commit 8cb44f9)
- Fix wrong checks on subclassing of deprecated classes. closes #581 (commit 46d98d6)
- Docs: 4-space indent for final spider example (commit 13846de)
- Fix HtmlParserLinkExtractor and tests after #485 merge (commit 368a946)
- BaseSgmlLinkExtractor: Fixed the missing space when the link has an inner tag (commit b566388)
- BaseSgmlLinkExtractor: Added unit test of a link with an inner tag (commit c1cb418)
- BaseSgmlLinkExtractor: Fixed unknown_endtag() so that it only set current_link=None when the end tag match the opening tag (commit 7e4d627)
- Fix tests for Travis-CI build (commit 76c7e20)
- replace unencodeable codepoints with html entities. fixes #562 and #285 (commit 5f87b17)
- RegexLinkExtractor: encode URL unicode value when creating Links (commit d0ee545)
- Updated the tutorial crawl output with latest output. (commit 8da65de)
- Updated shell docs with the crawler reference and fixed the actual shell output. (commit 875b9ab)
- PEP8 minor edits. (commit f89efaf)
- Expose current crawler in the scrapy shell. (commit 5349cec)
- Unused re import and PEP8 minor edits. (commit 387f414)
- Ignore None’s values when using the ItemLoader. (commit 0632546)
- DOC Fixed HTTPCACHE_STORAGE typo in the default value which is now Filesystem instead Dbm. (commit cde9a8c)
- show ubuntu setup instructions as literal code (commit fb5c9c5)
- Update Ubuntu installation instructions (commit 70fb105)
- Merge pull request #550 from stray-leone/patch-1 (commit 6f70b6a)
- modify the version of scrapy ubuntu package (commit 725900d)
- fix 0.22.0 release date (commit af0219a)
- fix typos in news.rst and remove (not released yet) header (commit b7f58f4)

## Scrapy 0.22.0 (released 2014-01-17)

### Enhancements

- [Backward incompatible] Switched HTTPCacheMiddleware backend to filesystem (issue 541) To restore old backend set `HTTPCACHE_STORAGE` to `scrapy.contrib.httpcache.DbmCacheStorage`
- Proxy https:// urls using CONNECT method (issue 392, issue 397)
- Add a middleware to crawl ajax crawleable pages as defined by google (issue 343)
- Rename scrapy.spider.BaseSpider to scrapy.spider.Spider (issue 510, issue 519)
- Selectors register EXSLT namespaces by default (issue 472)
- Unify item loaders similar to selectors renaming (issue 461)
- Make `RFPDupeFilter` class easily subclassable (issue 533)
- Improve test coverage and forthcoming Python 3 support (issue 525)
- Promote startup info on settings and middleware to INFO level (issue 520)
- Support partials in `get_func_args` util (issue 506, issue:504)
- Allow running indiviual tests via tox (issue 503)
- Update extensions ignored by link extractors (issue 498)
- Add middleware methods to get files/images/thumbs paths (issue 490)
- Improve offsite middleware tests (issue 478)
- Add a way to skip default Referer header set by RefererMiddleware (issue 475)
- Do not send `x-gzip` in default `Accept-Encoding` header (issue 469)
- Support defining http error handling using settings (issue 466)
- Use modern python idioms wherever you find legacies (issue 497)
- Improve and correct documentation (issue 527, issue 524, issue 521, issue 517, issue 512, issue 505, issue 502, issue 489, issue 465, issue 460, issue 425, issue 536)

### Fixes

- Update Selector class imports in CrawlSpider template (issue 484)
- Fix unexistent reference to `engine.slots` (issue 464)
- Do not try to call `body_as_unicode()` on a non-TextResponse instance (issue 462)
- Warn when subclassing XPathItemLoader, previously it only warned on instantiation. (issue 523)
- Warn when subclassing XPathSelector, previously it only warned on instantiation. (issue 537)
- Multiple fixes to memory stats (issue 531, issue 530, issue 529)
- Fix overriding url in `FormRequest.from_response()` (issue 507)
- Fix tests runner under pip 1.5 (issue 513)
- Fix logging error when spider name is unicode (issue 479)

## Scrapy 0.20.2 (released 2013-12-09)

- Update CrawlSpider Template with Selector changes (commit 6d1457d)
- fix method name in tutorial. closes GH-480 (commit b4fc359

## Scrapy 0.20.1 (released 2013-11-28)

- include_package_data is required to build wheels from published sources (commit 5ba1ad5)
- process_parallel was leaking the failures on its internal deferreds. closes #458 (commit 419a780)

## Scrapy 0.20.0 (released 2013-11-08)

### Enhancements

- New Selector’s API including CSS selectors (issue 395 and issue 426),
- Request/Response url/body attributes are now immutable (modifying them had been deprecated for a long time)
- `ITEM_PIPELINES` is now defined as a dict (instead of a list)
- Sitemap spider can fetch alternate URLs (issue 360)
- `Selector.remove_namespaces()` now remove namespaces from element’s attributes. (issue 416)
- Paved the road for Python 3.3+ (issue 435, issue 436, issue 431, issue 452)
- New item exporter using native python types with nesting support (issue 366)
- Tune HTTP1.1 pool size so it matches concurrency defined by settings (commit b43b5f575)
- scrapy.mail.MailSender now can connect over TLS or upgrade using STARTTLS (issue 327)
- New FilesPipeline with functionality factored out from ImagesPipeline (issue 370, issue 409)
- Recommend Pillow instead of PIL for image handling (issue 317)
- Added debian packages for Ubuntu quantal and raring (commit 86230c0)
- Mock server (used for tests) can listen for HTTPS requests (issue 410)
- Remove multi spider support from multiple core components (issue 422, issue 421, issue 420, issue 419, issue 423, issue 418)
- Travis-CI now tests Scrapy changes against development versions of `w3lib` and `queuelib` python packages.
- Add pypy 2.1 to continuous integration tests (commit ecfa7431)
- Pylinted, pep8 and removed old-style exceptions from source (issue 430, issue 432)
- Use importlib for parametric imports (issue 445)
- Handle a regression introduced in Python 2.7.5 that affects XmlItemExporter (issue 372)
- Bugfix crawling shutdown on SIGINT (issue 450)
- Do not submit `reset` type inputs in FormRequest.from_response (commit b326b87)
- Do not silence download errors when request errback raises an exception (commit 684cfc0)

### Bugfixes

- Fix tests under Django 1.6 (commit b6bed44c)
- Lot of bugfixes to retry middleware under disconnections using HTTP 1.1 download handler
- Fix inconsistencies among Twisted releases (issue 406)
- Fix scrapy shell bugs (issue 418, issue 407)
- Fix invalid variable name in setup.py (issue 429)
- Fix tutorial references (issue 387)
- Improve request-response docs (issue 391)
- Improve best practices docs (issue 399, issue 400, issue 401, issue 402)
- Improve django integration docs (issue 404)
- Document `bindaddress` request meta (commit 37c24e01d7)
- Improve `Request` class documentation (issue 226)

### Other

- Dropped Python 2.6 support (issue 448)
- Add cssselect python package as install dependency
- Drop libxml2 and multi selector’s backend support, lxml is required from now on.
- Minimum Twisted version increased to 10.0.0, dropped Twisted 8.0 support.
- Running test suite now requires `mock` python library (issue 390)

### Thanks

Thanks to everyone who contribute to this release!

List of contributors sorted by number of commits:

    69 Daniel Graña <dangra@...>
    37 Pablo Hoffman <pablo@...>
    13 Mikhail Korobov <kmike84@...>
     9 Alex Cepoi <alex.cepoi@...>
     9 alexanderlukanin13 <alexander.lukanin.13@...>
     8 Rolando Espinoza La fuente <darkrho@...>
     8 Lukasz Biedrycki <lukasz.biedrycki@...>
     6 Nicolas Ramirez <nramirez.uy@...>
     3 Paul Tremberth <paul.tremberth@...>
     2 Martin Olveyra <molveyra@...>
     2 Stefan <misc@...>
     2 Rolando Espinoza <darkrho@...>
     2 Loren Davie <loren@...>
     2 irgmedeiros <irgmedeiros@...>
     1 Stefan Koch <taikano@...>
     1 Stefan <cct@...>
     1 scraperdragon <dragon@...>
     1 Kumara Tharmalingam <ktharmal@...>
     1 Francesco Piccinno <stack.box@...>
     1 Marcos Campal <duendex@...>
     1 Dragon Dave <dragon@...>
     1 Capi Etheriel <barraponto@...>
     1 cacovsky <amarquesferraz@...>
     1 Berend Iwema <berend@...>

## Scrapy 0.18.4 (released 2013-10-10)

- IPython refuses to update the namespace. fix #396 (commit 3d32c4f)
- Fix AlreadyCalledError replacing a request in shell command. closes #407 (commit b1d8919)
- Fix start_requests laziness and early hangs (commit 89faf52)

## Scrapy 0.18.3 (released 2013-10-03)

- fix regression on lazy evaluation of start requests (commit 12693a5)
- forms: do not submit reset inputs (commit e429f63)
- increase unittest timeouts to decrease travis false positive failures (commit 912202e)
- backport master fixes to json exporter (commit cfc2d46)
- Fix permission and set umask before generating sdist tarball (commit 06149e0)

## Scrapy 0.18.2 (released 2013-09-03)

- Backport `scrapy check` command fixes and backward compatible multi crawler process(issue 339)

## Scrapy 0.18.1 (released 2013-08-27)

- remove extra import added by cherry picked changes (commit d20304e)
- fix crawling tests under twisted pre 11.0.0 (commit 1994f38)
- py26 can not format zero length fields {} (commit abf756f)
- test PotentiaDataLoss errors on unbound responses (commit b15470d)
- Treat responses without content-length or Transfer-Encoding as good responses (commit c4bf324)
- do no include ResponseFailed if http11 handler is not enabled (commit 6cbe684)
- New HTTP client wraps connection losts in ResponseFailed exception. fix #373 (commit 1a20bba)
- limit travis-ci build matrix (commit 3b01bb8)
- Merge pull request #375 from peterarenot/patch-1 (commit fa766d7)
- Fixed so it refers to the correct folder (commit 3283809)
- added quantal & raring to support ubuntu releases (commit 1411923)
- fix retry middleware which didn’t retry certain connection errors after the upgrade to http1 client, closes GH-373 (commit bb35ed0)
- fix XmlItemExporter in Python 2.7.4 and 2.7.5 (commit de3e451)
- minor updates to 0.18 release notes (commit c45e5f1)
- fix contributters list format (commit 0b60031)

## Scrapy 0.18.0 (released 2013-08-09)

- Lot of improvements to testsuite run using Tox, including a way to test on pypi
- Handle GET parameters for AJAX crawleable urls (commit 3fe2a32)
- Use lxml recover option to parse sitemaps (issue 347)
- Bugfix cookie merging by hostname and not by netloc (issue 352)
- Support disabling `HttpCompressionMiddleware` using a flag setting (issue 359)
- Support xml namespaces using `iternodes` parser in `XMLFeedSpider` (issue 12)
- Support `dont_cache` request meta flag (issue 19)
- Bugfix `scrapy.utils.gz.gunzip` broken by changes in python 2.7.4 (commit 4dc76e)
- Bugfix url encoding on `SgmlLinkExtractor` (issue 24)
- Bugfix `TakeFirst` processor shouldn’t discard zero (0) value (issue 59)
- Support nested items in xml exporter (issue 66)
- Improve cookies handling performance (issue 77)
- Log dupe filtered requests once (issue 105)
- Split redirection middleware into status and meta based middlewares (issue 78)
- Use HTTP1.1 as default downloader handler (issue 109 and issue 318)
- Support xpath form selection on `FormRequest.from_response` (issue 185)
- Bugfix unicode decoding error on `SgmlLinkExtractor` (issue 199)
- Bugfix signal dispatching on pypi interpreter (issue 205)
- Improve request delay and concurrency handling (issue 206)
- Add RFC2616 cache policy to `HttpCacheMiddleware` (issue 212)
- Allow customization of messages logged by engine (issue 214)
- Multiples improvements to `DjangoItem` (issue 217, issue 218, issue 221)
- Extend Scrapy commands using setuptools entry points (issue 260)
- Allow spider `allowed_domains` value to be set/tuple (issue 261)
- Support `settings.getdict` (issue 269)
- Simplify internal `scrapy.core.scraper` slot handling (issue 271)
- Added `Item.copy` (issue 290)
- Collect idle downloader slots (issue 297)
- Add `ftp://` scheme downloader handler (issue 329)
- Added downloader benchmark webserver and spider tools Benchmarking
- Moved persistent (on disk) queues to a separate project (queuelib) which scrapy now depends on
- Add scrapy commands using external libraries (issue 260)
- Added `--pdb` option to `scrapy` command line tool
- Added `XPathSelector.remove_namespaces()` which allows to remove all namespaces from XML documents for convenience (to work with namespace-less XPaths). Documented in Selectors.
- Several improvements to spider contracts
- New default middleware named MetaRefreshMiddldeware that handles meta-refresh html tag redirections,
- MetaRefreshMiddldeware and RedirectMiddleware have different priorities to address #62
- added from_crawler method to spiders
- added system tests with mock server
- more improvements to Mac OS compatibility (thanks Alex Cepoi)
- several more cleanups to singletons and multi-spider support (thanks Nicolas Ramirez)
- support custom download slots
- added –spider option to “shell” command.
- log overridden settings when scrapy starts

Thanks to everyone who contribute to this release. Here is a list of contributors sorted by number of commits:

    130 Pablo Hoffman <pablo@...>
     97 Daniel Graña <dangra@...>
     20 Nicolás Ramírez <nramirez.uy@...>
     13 Mikhail Korobov <kmike84@...>
     12 Pedro Faustino <pedrobandim@...>
     11 Steven Almeroth <sroth77@...>
      5 Rolando Espinoza La fuente <darkrho@...>
      4 Michal Danilak <mimino.coder@...>
      4 Alex Cepoi <alex.cepoi@...>
      4 Alexandr N Zamaraev (aka tonal) <tonal@...>
      3 paul <paul.tremberth@...>
      3 Martin Olveyra <molveyra@...>
      3 Jordi Llonch <llonchj@...>
      3 arijitchakraborty <myself.arijit@...>
      2 Shane Evans <shane.evans@...>
      2 joehillen <joehillen@...>
      2 Hart <HartSimha@...>
      2 Dan <ellisd23@...>
      1 Zuhao Wan <wanzuhao@...>
      1 whodatninja <blake@...>
      1 vkrest <v.krestiannykov@...>
      1 tpeng <pengtaoo@...>
      1 Tom Mortimer-Jones <tom@...>
      1 Rocio Aramberri <roschegel@...>
      1 Pedro <pedro@...>
      1 notsobad <wangxiaohugg@...>
      1 Natan L <kuyanatan.nlao@...>
      1 Mark Grey <mark.grey@...>
      1 Luan <luanpab@...>
      1 Libor Nenadál <libor.nenadal@...>
      1 Juan M Uys <opyate@...>
      1 Jonas Brunsgaard <jonas.brunsgaard@...>
      1 Ilya Baryshev <baryshev@...>
      1 Hasnain Lakhani <m.hasnain.lakhani@...>
      1 Emanuel Schorsch <emschorsch@...>
      1 Chris Tilden <chris.tilden@...>
      1 Capi Etheriel <barraponto@...>
      1 cacovsky <amarquesferraz@...>
      1 Berend Iwema <berend@...>

## Scrapy 0.16.5 (released 2013-05-30)

- obey request method when scrapy deploy is redirected to a new endpoint (commit 8c4fcee)
- fix inaccurate downloader middleware documentation. refs #280 (commit 40667cb)
- doc: remove links to diveintopython.org, which is no longer available. closes #246 (commit bd58bfa)
- Find form nodes in invalid html5 documents (commit e3d6945)
- Fix typo labeling attrs type bool instead of list (commit a274276)

## Scrapy 0.16.4 (released 2013-01-23)

- fixes spelling errors in documentation (commit 6d2b3aa)
- add doc about disabling an extension. refs #132 (commit c90de33)
- Fixed error message formatting. log.err() doesn’t support cool formatting and when error occurred, the message was: “ERROR: Error processing %(item)s” (commit c16150c)
- lint and improve images pipeline error logging (commit 56b45fc)
- fixed doc typos (commit 243be84)
- add documentation topics: Broad Crawls & Common Practies (commit 1fbb715)
- fix bug in scrapy parse command when spider is not specified explicitly. closes #209 (commit c72e682)
- Update docs/topics/commands.rst (commit 28eac7a)

## Scrapy 0.16.3 (released 2012-12-07)

- Remove concurrency limitation when using download delays and still ensure inter-request delays are enforced (commit 487b9b5)
- add error details when image pipeline fails (commit 8232569)
- improve mac os compatibility (commit 8dcf8aa)
- setup.py: use README.rst to populate long_description (commit 7b5310d)
- doc: removed obsolete references to ClientForm (commit 80f9bb6)
- correct docs for default storage backend (commit 2aa491b)
- doc: removed broken proxyhub link from FAQ (commit bdf61c4)
- Fixed docs typo in SpiderOpenCloseLogging example (commit 7184094)

## Scrapy 0.16.2 (released 2012-11-09)

- scrapy contracts: python2.6 compat (commit a4a9199)
- scrapy contracts verbose option (commit ec41673)
- proper unittest-like output for scrapy contracts (commit 86635e4)
- added open_in_browser to debugging doc (commit c9b690d)
- removed reference to global scrapy stats from settings doc (commit dd55067)
- Fix SpiderState bug in Windows platforms (commit 58998f4)

## Scrapy 0.16.1 (released 2012-10-26)

- fixed LogStats extension, which got broken after a wrong merge before the 0.16 release (commit 8c780fd)
- better backward compatibility for scrapy.conf.settings (commit 3403089)
- extended documentation on how to access crawler stats from extensions (commit c4da0b5)
- removed .hgtags (no longer needed now that scrapy uses git) (commit d52c188)
- fix dashes under rst headers (commit fa4f7f9)
- set release date for 0.16.0 in news (commit e292246)

## Scrapy 0.16.0 (released 2012-10-18)

Scrapy changes:

- added Spiders Contracts, a mechanism for testing spiders in a formal/reproducible way
- added options `-o` and `-t` to the `runspider` command
- documented AutoThrottle extension and added to extensions installed by default. You still need to enable it with `AUTOTHROTTLE_ENABLED`
- major Stats Collection refactoring: removed separation of global/per-spider stats, removed stats-related signals (`stats_spider_opened`, etc). Stats are much simpler now, backward compatibility is kept on the Stats Collector API and signals.
- added `process_start_requests()` method to spider middlewares
- dropped Signals singleton. Signals should now be accesed through the Crawler.signals attribute. See the signals documentation for more info.
- dropped Signals singleton. Signals should now be accesed through the Crawler.signals attribute. See the signals documentation for more info.
- dropped Stats Collector singleton. Stats can now be accessed through the Crawler.stats attribute. See the stats collection documentation for more info.
- documented Core API
- `lxml` is now the default selectors backend instead of `libxml2`
- ported FormRequest.from_response() to use lxml instead of ClientForm
- removed modules: `scrapy.xlib.BeautifulSoup` and `scrapy.xlib.ClientForm`
- SitemapSpider: added support for sitemap urls ending in .xml and .xml.gz, even if they advertise a wrong content type (commit 10ed28b)
- StackTraceDump extension: also dump trackref live references (commit fe2ce93)
- nested items now fully supported in JSON and JSONLines exporters
- added `cookiejar` Request meta key to support multiple cookie sessions per spider
- decoupled encoding detection code to w3lib.encoding, and ported Scrapy code to use that module
- dropped support for Python 2.5. See https://blog.scrapinghub.com/2012/02/27/scrapy-0-15-dropping-support-for-python-2-5/
- dropped support for Twisted 2.5
- added `REFERER_ENABLED` setting, to control referer middleware
- changed default user agent to: `Scrapy/VERSION (+http://scrapy.org)`
- removed (undocumented) `HTMLImageLinkExtractor` class from `scrapy.contrib.linkextractors.image`
- removed per-spider settings (to be replaced by instantiating multiple crawler objects)
- `USER_AGENT` spider attribute will no longer work, use `user_agent` attribute instead
- `DOWNLOAD_TIMEOUT` spider attribute will no longer work, use `download_timeout` attribute instead
- removed `ENCODING_ALIASES` setting, as encoding auto-detection has been moved to the w3lib library
- promoted DjangoItem to main contrib
- LogFormatter method now return dicts(instead of strings) to support lazy formatting (issue 164, commit dcef7b0)
- downloader handlers (`DOWNLOAD_HANDLERS` setting) now receive settings as the first argument of the constructor
- replaced memory usage acounting with (more portable) resource module, removed `scrapy.utils.memory` module
- removed signal: `scrapy.mail.mail_sent`
- removed `TRACK_REFS` setting, now trackrefs is always enabled
- DBM is now the default storage backend for HTTP cache middleware
- number of log messages (per level) are now tracked through Scrapy stats (stat name: `log_count/LEVEL`)
- number received responses are now tracked through Scrapy stats (stat name: `response_received_count`)
- removed `scrapy.log.started` attribute

## Scrapy 0.14.4

- added precise to supported ubuntu distros (commit b7e46df)
- fixed bug in json-rpc webservice reported in https://groups.google.com/forum/#!topic/scrapy-users/qgVBmFybNAQ/discussion. also removed no longer supported ‘run’ command from extras/scrapy-ws.py (commit 340fbdb)
- meta tag attributes for content-type http equiv can be in any order. #123 (commit 0cb68af)
- replace “import Image” by more standard “from PIL import Image”. closes #88 (commit 4d17048)
- return trial status as bin/runtests.sh exit value. #118 (commit b7b2e7f)

## Scrapy 0.14.3

- forgot to include pydispatch license. #118 (commit fd85f9c)
- include egg files used by testsuite in source distribution. #118 (commit c897793)
- update docstring in project template to avoid confusion with genspider command, which may be considered as an advanced feature. refs #107 (commit 2548dcc)
- added note to docs/topics/firebug.rst about google directory being shut down (commit 668e352)
- dont discard slot when empty, just save in another dict in order to recycle if needed again. (commit 8e9f607)
- do not fail handling unicode xpaths in libxml2 backed selectors (commit b830e95)
- fixed minor mistake in Request objects documentation (commit bf3c9ee)
- fixed minor defect in link extractors documentation (commit ba14f38)
- removed some obsolete remaining code related to sqlite support in scrapy (commit 0665175)

## Scrapy 0.14.2

- move buffer pointing to start of file before computing checksum. refs #92 (commit 6a5bef2)
- Compute image checksum before persisting images. closes #92 (commit 9817df1)
- remove leaking references in cached failures (commit 673a120)
- fixed bug in MemoryUsage extension: get_engine_status() takes exactly 1 argument (0 given) (commit 11133e9)
- fixed struct.error on http compression middleware. closes #87 (commit 1423140)
- ajax crawling wasn’t expanding for unicode urls (commit 0de3fb4)
- Catch start_requests iterator errors. refs #83 (commit 454a21d)
- Speed-up libxml2 XPathSelector (commit 2fbd662)
- updated versioning doc according to recent changes (commit 0a070f5)
- scrapyd: fixed documentation link (commit 2b4e4c3)
- extras/makedeb.py: no longer obtaining version from git (commit caffe0e)

## Scrapy 0.14.1

- extras/makedeb.py: no longer obtaining version from git (commit caffe0e)
- bumped version to 0.14.1 (commit 6cb9e1c)
- fixed reference to tutorial directory (commit 4b86bd6)
- doc: removed duplicated callback argument from Request.replace() (commit 1aeccdd)
- fixed formatting of scrapyd doc (commit 8bf19e6)
- Dump stacks for all running threads and fix engine status dumped by StackTraceDump extension (commit 14a8e6e)
- added comment about why we disable ssl on boto images upload (commit 5223575)
- SSL handshaking hangs when doing too many parallel connections to S3 (commit 63d583d)
- change tutorial to follow changes on dmoz site (commit bcb3198)
- Avoid _disconnectedDeferred AttributeError exception in Twisted>=11.1.0 (commit 98f3f87)
- allow spider to set autothrottle max concurrency (commit 175a4b5)

## Scrapy 0.14

### New features and settings

- Support for AJAX crawleable urls
- New persistent scheduler that stores requests on disk, allowing to suspend and resume crawls (r2737)
- added `-o` option to `scrapy crawl`, a shortcut for dumping scraped items into a file (or standard output using `-`)
- Added support for passing custom settings to Scrapyd `schedule.json` api (r2779, r2783)
- New `ChunkedTransferMiddleware` (enabled by default) to support chunked transfer encoding (r2769)
- Add boto 2.0 support for S3 downloader handler (r2763)
- Added marshal to formats supported by feed exports (r2744)
- In request errbacks, offending requests are now received in `failure.request` attribute (r2738)
- Big downloader refactoring to support per domain/ip concurrency limits (r2732)
    - `CONCURRENT_REQUESTS_PER_SPIDER` setting has been deprecated and replaced by:
        - `CONCURRENT_REQUESTS`, `CONCURRENT_REQUESTS_PER_DOMAIN`, `CONCURRENT_REQUESTS_PER_IP`
    - check the documentation for more details
- Added builtin caching DNS resolver (r2728)
- Moved Amazon AWS-related components/extensions (SQS spider queue, SimpleDB stats collector) to a separate project: [scaws](https://github.com/scrapinghub/scaws) (r2706, r2714)
- Moved spider queues to scrapyd: `scrapy.spiderqueue` -> `scrapyd.spiderqueue` (r2708)
- Moved sqlite utils to scrapyd: `scrapy.utils.sqlite` -> `scrapyd.sqlite` (r2781)
- Real support for returning iterators on `start_requests()` method. The iterator is now consumed during the crawl when the spider is getting idle (r2704)
- Added `REDIRECT_ENABLED` setting to quickly enable/disable the redirect middleware (r2697)
- Added `RETRY_ENABLED` setting to quickly enable/disable the retry middleware (r2694)
- Added `CloseSpider` exception to manually close spiders (r2691)
- Improved encoding detection by adding support for HTML5 meta charset declaration (r2690)
- Refactored close spider behavior to wait for all downloads to finish and be processed by spiders, before closing the spider (r2688)
- Added `SitemapSpider` (see documentation in Spiders page) (r2658)
- Added `LogStats` extension for periodically logging basic stats (like crawled pages and scraped items) (r2657)
- Make handling of gzipped responses more robust (#319, r2643). Now Scrapy will try and decompress as much as possible from a gzipped response, instead of failing with an `IOError`.
- Simplified !MemoryDebugger extension to use stats for dumping memory debugging info (r2639)
- Added new command to edit spiders: `scrapy edit` (r2636) and `-e` flag to `genspider` command that uses it (r2653)
- Changed default representation of items to pretty-printed dicts. (r2631). This improves default logging by making log more readable in the default case, for both Scraped and Dropped lines.
- Added `spider_error` signal (r2628)
- Added `COOKIES_ENABLED` setting (r2625)
- Stats are now dumped to Scrapy log (default value of `STATS_DUMP` setting has been changed to `True`). This is to make Scrapy users more aware of Scrapy stats and the data that is collected there.
- Added support for dynamically adjusting download delay and maximum concurrent requests (r2599)
- Added new DBM HTTP cache storage backend (r2576)
- Added `listjobs.json` API to Scrapyd (r2571)
- `CsvItemExporter`: added `join_multivalued` parameter (r2578)
- Added namespace support to `xmliter_lxml` (r2552)
- Improved cookies middleware by making `COOKIES_DEBUG` nicer and documenting it (r2579)
- Several improvements to Scrapyd and Link extractors

### Code rearranged and removed

- Merged item passed and item scraped concepts, as they have often proved confusing in the past. This means: (r2630)
    - original item_scraped signal was removed
    - original item_passed signal was renamed to item_scraped
    - old log lines `Scraped Item...` were removed
    - old log lines `Passed Item...` were renamed to `Scraped Item...` lines and downgraded to `DEBUG` level
- Reduced Scrapy codebase by striping part of Scrapy code into two new libraries:
    - w3lib (several functions from `scrapy.utils.{http,markup,multipart,response,url}`, done in r2584)
    - scrapely (was `scrapy.contrib.ibl`, done in r2586)
- Removed unused function: `scrapy.utils.request.request_info()` (r2577)
- Removed googledir project from `examples/googledir`. There’s now a new example project called `dirbot` available on github: https://github.com/scrapy/dirbot
- Removed support for default field values in Scrapy items (r2616)
- Removed experimental crawlspider v2 (r2632)
- Removed scheduler middleware to simplify architecture. Duplicates filter is now done in the scheduler itself, using the same dupe fltering class as before (`DUPEFILTER_CLASS` setting) (r2640)
- Removed support for passing urls to `scrapy crawl` command (use `scrapy parse` instead) (r2704)
- Removed deprecated Execution Queue (r2704)
- Removed (undocumented) spider context extension (from scrapy.contrib.spidercontext) (r2780)
- removed `CONCURRENT_SPIDERS` setting (use scrapyd maxproc instead) (r2789)
- Renamed attributes of core components: downloader.sites -> downloader.slots, scraper.sites -> scraper.slots (r2717, r2718)
- Renamed setting `CLOSESPIDER_ITEMPASSED` to `CLOSESPIDER_ITEMCOUNT` (r2655). Backward compatibility kept.

## Scrapy 0.12

The numbers like #NNN reference tickets in the old issue tracker (Trac) which is no longer available.

### New features and improvements

- Passed item is now sent in the `item` argument of the `item_passed` (#273)
- Added verbose option to `scrapy version` command, useful for bug reports (#298)
- HTTP cache now stored by default in the project data dir (#279)
- Added project data storage directory (#276, #277)
- Documented file structure of Scrapy projects (see command-line tool doc)
- New lxml backend for XPath selectors (#147)
- Per-spider settings (#245)
- Support exit codes to signal errors in Scrapy commands (#248)
- Added `-c` argument to `scrapy shell` command
- Made `libxml2` optional (#260)
- New `deploy` command (#261)
- Added `CLOSESPIDER_PAGECOUNT` setting (#253)
- Added `CLOSESPIDER_ERRORCOUNT` setting (#254)

### Scrapyd changes

- Scrapyd now uses one process per spider
- It stores one log file per spider run, and rotate them keeping the lastest 5 logs per spider (by default)
- A minimal web ui was added, available at http://localhost:6800 by default
- There is now a `scrapy server` command to start a Scrapyd server of the current project

### Changes to settings

- added `HTTPCACHE_ENABLED` setting (False by default) to enable HTTP cache middleware
- changed `HTTPCACHE_EXPIRATION_SECS` semantics: now zero means “never expire”.

### Deprecated/obsoleted functionality

- Deprecated `runserver` command in favor of `server` command which starts a Scrapyd server. See also: Scrapyd changes
- Deprecated `queue` command in favor of using Scrapyd `schedule.json` API. See also: Scrapyd changes
- Removed the !LxmlItemLoader (experimental contrib which never graduated to main contrib)

## Scrapy 0.10

The numbers like #NNN reference tickets in the old issue tracker (Trac) which is no longer available.

### New features and improvements

- New Scrapy service called `scrapyd` for deploying Scrapy crawlers in production (#218) (documentation available)
- Simplified Images pipeline usage which doesn’t require subclassing your own images pipeline now (#217)
- Scrapy shell now shows the Scrapy log by default (#206)
- Refactored execution queue in a common base code and pluggable backends called “spider queues” (#220)
- New persistent spider queue (based on SQLite) (#198), available by default, which allows to start Scrapy in server mode and then schedule spiders to run.
- Added documentation for Scrapy command-line tool and all its available sub-commands. (documentation available)
- Feed exporters with pluggable backends (#197) (documentation available)
- Deferred signals (#193)
- Added two new methods to item pipeline open_spider(), close_spider() with deferred support (#195)
- Support for overriding default request headers per spider (#181)
- Replaced default Spider Manager with one with similar functionality but not depending on Twisted Plugins (#186)
- Splitted Debian package into two packages - the library and the service (#187)
- Scrapy log refactoring (#188)
- New extension for keeping persistent spider contexts among different runs (#203)
- Added `dont_redirect` request.meta key for avoiding redirects (#233)
- Added `dont_retry` request.meta key for avoiding retries (#234)

### Command-line tool changes

- New `scrapy` command which replaces the old `scrapy-ctl.py` (#199) - there is only one global `scrapy` command now, instead of one `scrapy-ctl.py` per project - Added `scrapy.bat` script for running more conveniently from Windows
- Added bash completion to command-line tool (#210)
- Renamed command `start` to `runserver` (#209)

### API changes

- `url` and `body` attributes of Request objects are now read-only (#230)
- `Request.copy()` and `Request.replace()` now also copies their `callback` and `errback` attributes (#231)
- Removed `UrlFilterMiddleware` from `scrapy.contrib` (already disabled by default)
- Offsite middelware doesn’t filter out any request coming from a spider that doesn’t have a allowed_domains attribute (#225)
- Removed Spider Manager `load()` method. Now spiders are loaded in the constructor itself.
- Changes to Scrapy Manager (now called “Crawler”):
    - `scrapy.core.manager.ScrapyManager` class renamed to `scrapy.crawler.Crawler`
    - `scrapy.core.manager.scrapymanager` singleton moved to `scrapy.project.crawler`
- Moved module: `scrapy.contrib.spidermanager` to `scrapy.spidermanager`
- Spider Manager singleton moved from `scrapy.spider.spiders` to the `spiders` attribute of ``scrapy.project.crawler` singleton.
- moved Stats Collector classes: (#204)
    - `scrapy.stats.collector.StatsCollector` to `scrapy.statscol.StatsCollector`
    - `scrapy.stats.collector.SimpledbStatsCollector` to `scrapy.contrib.statscol.SimpledbStatsCollector`
- default per-command settings are now specified in the `default_settings` attribute of command object class (#201)
- changed arguments of Item pipeline `process_item()` method from `(spider, item)` to `(item, spider)`
    - backward compatibility kept (with deprecation warning)
- moved `scrapy.core.signals` module to `scrapy.signals`
    - backward compatibility kept (with deprecation warning)
- moved `scrapy.core.exceptions` module to `scrapy.exceptions`
    - backward compatibility kept (with deprecation warning)
- added `handles_request()` class method to `BaseSpider`
- dropped `scrapy.log.exc()` function (use `scrapy.log.err()` instead)
- dropped `component` argument of `scrapy.log.msg()` function
- dropped `scrapy.log.log_level` attribute
- Added `from_settings()` class methods to Spider Manager, and Item Pipeline Manager

### Changes to settings

- Added `HTTPCACHE_IGNORE_SCHEMES` setting to ignore certain schemes on !HttpCacheMiddleware (#225)
- Added `SPIDER_QUEUE_CLASS` setting which defines the spider queue to use (#220)
- Added `KEEP_ALIVE` setting (#220)
- Removed `SERVICE_QUEUE` setting (#220)
- Removed `COMMANDS_SETTINGS_MODULE` setting (#201)
- Renamed `REQUEST_HANDLERS` to `DOWNLOAD_HANDLERS` and make download handlers classes (instead of functions)

## Scrapy 0.9

The numbers like #NNN reference tickets in the old issue tracker (Trac) which is no longer available.

### New features and improvements

- Added SMTP-AUTH support to scrapy.mail
- New settings added: `MAIL_USER`, `MAIL_PASS` (r2065 | #149)
- Added new scrapy-ctl view command - To view URL in the browser, as seen by Scrapy (r2039)
- Added web service for controlling Scrapy process (this also deprecates the web console. (r2053 | #167)
- Support for running Scrapy as a service, for production systems (r1988, r2054, r2055, r2056, r2057 | #168)
- Added wrapper induction library (documentation only available in source code for now). (r2011)
- Simplified and improved response encoding support (r1961, r1969)
- Added `LOG_ENCODING` setting (r1956, documentation available)
- Added `RANDOMIZE_DOWNLOAD_DELAY` setting (enabled by default) (r1923, doc available)
- `MailSender` is no longer IO-blocking (r1955 | #146)
- Linkextractors and new Crawlspider now handle relative base tag urls (r1960 | #148)
- Several improvements to Item Loaders and processors (r2022, r2023, r2024, r2025, r2026, r2027, r2028, r2029, r2030)
- Added support for adding variables to telnet console (r2047 | #165)
- Support for requests without callbacks (r2050 | #166)

### API changes

- Change `Spider.domain_name` to `Spider.name` (SEP-012, r1975)
- `Response.encoding` is now the detected encoding (r1961)
- `HttpErrorMiddleware` now returns None or raises an exception (r2006 | #157)
- `scrapy.command` modules relocation (r2035, r2036, r2037)
- Added `ExecutionQueue` for feeding spiders to scrape (r2034)
- Removed `ExecutionEngine` singleton (r2039)
- Ported `S3ImagesStore` (images pipeline) to use boto and threads (r2033)
- Moved module: `scrapy.management.telnet` to `scrapy.telnet` (r2047)

### Changes to default settings

- Changed default `SCHEDULER_ORDER` to `DFO` (r1939)

## Scrapy 0.8

The numbers like #NNN reference tickets in the old issue tracker (Trac) which is no longer available.

### New features

- Added DEFAULT_RESPONSE_ENCODING setting (r1809)
- Added `dont_click` argument to `FormRequest.from_response()` method (r1813, r1816)
- Added `clickdata` argument to `FormRequest.from_response()` method (r1802, r1803)
- Added support for HTTP proxies (`HttpProxyMiddleware`) (r1781, r1785)
- Offsite spider middleware now logs messages when filtering out requests (r1841)

### Backward-incompatible changes

- Changed `scrapy.utils.response.get_meta_refresh()` signature (r1804)
- Removed deprecated `scrapy.item.ScrapedItem` class - use `scrapy.item.Item instead` (r1838)
- Removed deprecated `scrapy.xpath` module - use `scrapy.selector` instead. (r1836)
- Removed deprecated `core.signals.domain_open` signal - use `core.signals.domain_opened` instead (r1822)
- `log.msg()` now receives a `spider` argument (r1822)
    - Old domain argument has been deprecated and will be removed in 0.9. For spiders, you should always use the `spider` argument and pass spider references. If you really want to pass a string, use the `component` argument instead.
- Changed core signals `domain_opened`, `domain_closed`, `domain_idle`
- Changed Item pipeline to use spiders instead of domains
    - The `domain` argument of `process_item()` item pipeline method was changed to `spider`, the new signature is: `process_item(spider, item)` (r1827 | #105)
    - To quickly port your code (to work with Scrapy 0.8) just use `spider.domain_name` where you previously used `domain`.
- Changed Stats API to use spiders instead of domains (r1849 | #113)
    - `StatsCollector` was changed to receive spider references (instead of domains) in its methods (`set_value`, `inc_value`, etc).
    - added `StatsCollector.iter_spider_stats()` method
    - removed `StatsCollector.list_domains()` method
    - Also, Stats signals were renamed and now pass around spider references (instead of domains). Here’s a summary of the changes:
    - To quickly port your code (to work with Scrapy 0.8) just use `spider.domain_name` where you previously used `domain`. `spider_stats` contains exactly the same data as `domain_stats`.
- `CloseDomain` extension moved to `scrapy.contrib.closespider.CloseSpider` (r1833)
    - Its settings were also renamed:
        - `CLOSEDOMAIN_TIMEOUT` to `CLOSESPIDER_TIMEOUT`
        - `CLOSEDOMAIN_ITEMCOUNT` to `CLOSESPIDER_ITEMCOUNT`
- Removed deprecated `SCRAPYSETTINGS_MODULE` environment variable - use `SCRAPY_SETTINGS_MODULE` instead (r1840)
- Renamed setting: `REQUESTS_PER_DOMAIN` to `CONCURRENT_REQUESTS_PER_SPIDER` (r1830, r1844)
- Renamed setting: `CONCURRENT_DOMAINS` to `CONCURRENT_SPIDERS` (r1830)
- Refactored HTTP Cache middleware
- HTTP Cache middleware has been heavilty refactored, retaining the same functionality except for the domain sectorization which was removed. (r1843 )
- Renamed exception: `DontCloseDomain` to `DontCloseSpider` (r1859 | #120)
- Renamed extension: `DelayedCloseDomain` to `SpiderCloseDelay` (r1861 | #121)
- Removed obsolete `scrapy.utils.markup.remove_escape_chars` function - use `scrapy.utils.markup.replace_escape_chars` instead (r1865)

## Scrapy 0.7

First release of Scrapy.