JSON::Validator::Schema::OpenAPIv2(3pm)

NAME
JSON::Validator::Schema::OpenAPIv2 - OpenAPI version 2 / Swagger

SYNOPSIS
  use JSON::Validator;
  my $schema = JSON::Validator->new->schema("...")->schema;

  # Check for specification errors
  my $errors = $schema->errors;

  # Returns a list of zero or more JSON::Validator::Error objects
  my @request_errors = $schema->validate_request(
    [get => "/path"],
    {body => sub { return {exists => 1, value => {}} }},
  );

  # Returns a list of zero or more JSON::Validator::Error objects
  my @response_errors = $schema->validate_response(
    [get => "/path", 200],
    {body => sub { return {exists => 1, value => {}} }},
  );

DESCRIPTION
This class represents <http://swagger.io/v2/schema.json>.

ATTRIBUTES

  errors
  my $array_ref = $schema->errors;

See "errors" in JSON::Validator::Schema.

  moniker
  $str    = $schema->moniker;
  $schema = $schema->moniker("openapiv2");

Used to get/set the moniker for the given schema. Default value is "openapiv2".

  specification
  my $str    = $schema->specification;
  my $schema = $schema->specification($str);

Defaults to "<http://swagger.io/v2/schema.json>".

METHODS

  add_default_response
  $schema = $schema->add_default_response(\%params);

Used to add a default response schema for operations that does not already have one. %params can be:

•   description

    The human readable description added to the operation.

    Defaults: "Default response."

•   name

    The name used in the specification under "/components/schemas/".

    Defaults: "DefaultResponse"

•   schema

    The schema to add. The default schema below might change, but the basics will stay the same:

      {
        type: "object",
        required: ["errors"],
        properties: {
          errors: {
            type: "array",
            items: {
              type: "object",
              required: ["message"],
              properties: {
                message: {type: "string"},
                path: {type: "string"}
              }
            }
          }
        }
      }

•   status

    A list of status codes to apply the default schema to.

    Default: "[400, 401, 404, 500, 501]".

  base_url
  $url = $schema->base_url;
  $schema = $schema->base_url($url);

Can get or set the default URL for this schema. $url can be either a Mojo::URL object or a plain string.

This method will read or write "basePath", "host" and/or "schemas" in "data".

  coerce
  my $schema   = $schema->coerce({booleans => 1, numbers => 1, strings => 1});
  my $hash_ref = $schema->coerce;

Coercion is enabled by default, since headers, path parts, query parameters, ... are in most cases strings.

See also "coerce" in JSON::Validator.

  new
  $schema = JSON::Validator::Schema::OpenAPIv2->new(\%attrs);
  $schema = JSON::Validator::Schema::OpenAPIv2->new;

Same as "new" in JSON::Validator::Schema, but will also build L/coerce>.

  parameters_for_request
  $parameters = $schema->parameters_for_request([$method, $path]);

Finds all the request parameters defined in the schema, including inherited parameters. Returns "undef" if the $path and $method cannot be found.

Example return value:

  [
    {in => "query", name => "q"},
    {in => "body", name => "body", accepts => ["application/json"]},
  ]

The return value MUST not be mutated.

  parameters_for_response
  $array_ref = $schema->parameters_for_response([$method, $path, $status]);

Finds the response parameters defined in the schema. Returns "undef" if the $path, $method and $status cannot be found. Will default to the "default" response definition if $status could not be found and "default" exists.

Example return value:

  [
    {in => "header", name => "X-Foo"},
    {in => "body", name => "body", accepts => ["application/json"]},
  ]

The return value MUST not be mutated.

  routes
  $collection = $schema->routes;

Used to gather all available routes in the schema and return them sorted. The result is a Mojo::Collection object, where each item has a hash looking like this:

  {
    method       => 'get',
    path         => '/user/{id}',
    operation_id => 'getUser', # Might be undef()
  }

  validate_request
  @errors = $schema->validate_request([$method, $path], \%req);

This method can be used to validate a HTTP request. %req should contain key/value pairs representing the request parameters. Example:

  %req = (
    body => sub {
      my ($name, $param) = shift;
      # $param = {name => $name, in => ..., schema => ..., ...}
      return {exists => 1, value => \%all_params} unless defined $name;
      return {exists => 1, value => "..."};
    },
    formData => {email => "..."},
    header => {"X-Request-Base" => "..."},
    path => {id => "..."},
    query => {limit => 42},
  );

"formData", "header", "path" and "query" can be either a hash-ref, a hash-like object or a code ref, while "body" MUST be a code ref. The return value from the code ref will get mutated, making it possible to check if an individual parameter was validated or not.

  # Before: "exists" and "value" must be present
  my @evaluated;
  $req{query} =  sub { push @evaluated, {exists => 1, value => 42}, return $evaluated[-1] };

  # Validate
  $schema->validate_request(get => "/user"], \%req);

  # After: "in", "name" and "valid" are added
  $evaluated[-1] ==> {exists => 1, value => 42, in => "query", name => "foo", valid => 1};

A plain hash-ref will /not get mutated.

The body hash-ref can also have a "content_type" key. This will be checked against the list of valid request or response content types in the spec.

  validate_response
  @errors = $schema->validate_response([$method, $path, $status], \%res);

This method can be used to validate a HTTP response. %res should contain key/value pairs representing the response parameters. Example:

  %res = (
    body => sub {
      my ($name, $param) = shift;
      # $param = {name => $name, in => ..., ...}
      return {exists => 1, value => \%all_params} unless defined $name;
      return {accept => "application/json", exists => 1, value => "..."};
    },
    header => {"Location" => "..."},
  );

%res follows the same rules as %req in "validate_request", but also supports "accept", instead of specifying "content_type". "accept" should have the same format as an "Accept" HTTP header.

SEE ALSO
JSON::Validator, Mojolicious::Plugin::OpenAPI, <http://openapi-specification-visual-documentation.apihandyman.io/>