Mail::Message::Body::File(3pm)

NAME
Mail::Message::Body::File - body of a message temporarily stored in a file

INHERITANCE
 Mail::Message::Body::File
   is a Mail::Message::Body
   is a Mail::Reporter

   Mail::Message::Body also extends Mail::Reporter
   is a Mail::Reporter

SYNOPSIS
  See Mail::Message::Body

DESCRIPTION
The body (content) of a message can be stored in various ways. In this documentation you find the description of extra functionality you have when a message is stored in a file.

Storing a whole message is a file is useful when the body is large. Although access through a file is slower, it is saving a lot of memory.

Extends "DESCRIPTION" in Mail::Message::Body.

OVERLOADED
Extends "OVERLOADED" in Mail::Message::Body.

overload: '""' stringification
    Inherited, see "OVERLOADED" in Mail::Message::Body

overload: '==' numerical comparison
    Inherited, see "OVERLOADED" in Mail::Message::Body

overload: '@{}' addressed as array
    Inherited, see "OVERLOADED" in Mail::Message::Body

overload: bool true/false
    Inherited, see "OVERLOADED" in Mail::Message::Body

METHODS
Extends "METHODS" in Mail::Message::Body.

  Constructors
Extends "Constructors" in Mail::Message::Body.

$obj->clone()
    Inherited, see "Constructors" in Mail::Message::Body

$class->new(%options)
    Inherited, see "Constructors" in Mail::Message::Body

     -Option           --Defined in         --Default
      based_on           Mail::Message::Body  undef
      charset            Mail::Message::Body  'PERL'
      checked            Mail::Message::Body  false
      content_id         Mail::Message::Body  undef
      data               Mail::Message::Body  undef
      description        Mail::Message::Body  undef
      disposition        Mail::Message::Body  undef
      eol                Mail::Message::Body  'NATIVE'
      file               Mail::Message::Body  undef
      filename           Mail::Message::Body  undef
      language           Mail::Message::Body  undef
      message            Mail::Message::Body  undef
      mime_type          Mail::Message::Body  'text/plain'
      modified           Mail::Message::Body  false
      transfer_encoding  Mail::Message::Body  'none'

    based_on => $body
    charset => $charset|'PERL'|<undef>
    checked => BOOLEAN
    content_id => STRING
    data => \@lines|$text
    description => STRING|$field
    disposition => STRING|$field
    eol => 'CR'|'LF'|'CRLF'|'NATIVE'
    file => $file|$handle|$io
    filename => $file
    language => STRING|\@lang|$field
    message => $message
    mime_type => STRING|$field|$mime
    modified => BOOLEAN
    transfer_encoding => STRING|$field

  Attributes
Extends "Attributes" in Mail::Message::Body.

$obj->charsetDetectAlgorithm( [CODE|undef|METHOD] )
    Inherited, see "Attributes" in Mail::Message::Body::Encode

  Constructing a body
Extends "Constructing a body" in Mail::Message::Body.

$obj->attach(@messages, %options)
    Inherited, see "Constructing a body" in Mail::Message::Body::Construct

$obj->charsetDetect(%options)
    Inherited, see "Constructing a body" in Mail::Message::Body::Encode

$obj->check()
    Inherited, see "Constructing a body" in Mail::Message::Body::Encode

$obj->concatenate(@components)
    Inherited, see "Constructing a body" in Mail::Message::Body::Construct

$obj->decoded(%options)
    Inherited, see "Constructing a body" in Mail::Message::Body

$obj->encode(%options)
    Inherited, see "Constructing a body" in Mail::Message::Body::Encode

$obj->encoded(%options)
    Inherited, see "Constructing a body" in Mail::Message::Body::Encode

$obj->eol( ['CR'|'LF'|'CRLF'|'NATIVE'] )
    Inherited, see "Constructing a body" in Mail::Message::Body::Encode

$obj->foreachLine(CODE)
    Inherited, see "Constructing a body" in Mail::Message::Body::Construct

$obj->stripSignature(%options)
    Inherited, see "Constructing a body" in Mail::Message::Body::Construct

$obj->unify($body)
    Inherited, see "Constructing a body" in Mail::Message::Body::Encode

  The body
Extends "The body" in Mail::Message::Body.

$obj->isDelayed()
    Inherited, see "The body" in Mail::Message::Body

$obj->isMultipart()
    Inherited, see "The body" in Mail::Message::Body

$obj->isNested()
    Inherited, see "The body" in Mail::Message::Body

$obj->message( [$message] )
    Inherited, see "The body" in Mail::Message::Body

$obj->partNumberOf($part)
    Inherited, see "The body" in Mail::Message::Body

  About the payload
Extends "About the payload" in Mail::Message::Body.

$obj->charset()
    Inherited, see "About the payload" in Mail::Message::Body

$obj->checked( [BOOLEAN] )
    Inherited, see "About the payload" in Mail::Message::Body

$obj->contentId( [STRING|$field] )
    Inherited, see "About the payload" in Mail::Message::Body

$obj->description( [STRING|$field] )
    Inherited, see "About the payload" in Mail::Message::Body

$obj->disposition( [STRING|$field] )
    Inherited, see "About the payload" in Mail::Message::Body

$obj->dispositionFilename( [$directory] )
    Inherited, see "About the payload" in Mail::Message::Body::Encode

$obj->isBinary()
    Inherited, see "About the payload" in Mail::Message::Body::Encode

$obj->isText()
    Inherited, see "About the payload" in Mail::Message::Body::Encode

$obj->language( [@langs|\@langs|$langs|$field] )
    Inherited, see "About the payload" in Mail::Message::Body

$obj->mimeType()
    Inherited, see "About the payload" in Mail::Message::Body

$obj->nrLines()
    Inherited, see "About the payload" in Mail::Message::Body

$obj->size()
    Inherited, see "About the payload" in Mail::Message::Body

$obj->transferEncoding( [STRING|$field] )
    Inherited, see "About the payload" in Mail::Message::Body

$obj->type( [STRING|$field] )
    Inherited, see "About the payload" in Mail::Message::Body

  Access to the payload
Extends "Access to the payload" in Mail::Message::Body.

$obj->endsOnNewline()
    Inherited, see "Access to the payload" in Mail::Message::Body

$obj->file()
    Inherited, see "Access to the payload" in Mail::Message::Body

$obj->lines()
    Inherited, see "Access to the payload" in Mail::Message::Body

$obj->print()
    Inherited, see "Access to the payload" in Mail::Message::Body

$obj->printEscapedFrom($fh)
    Inherited, see "Access to the payload" in Mail::Message::Body

$obj->string()
    Inherited, see "Access to the payload" in Mail::Message::Body

$obj->stripTrailingNewline()
    Inherited, see "Access to the payload" in Mail::Message::Body

$obj->write(%options)
    Inherited, see "Access to the payload" in Mail::Message::Body

  Internals
Extends "Internals" in Mail::Message::Body.

$any->addTransferEncHandler( $name, <$class|$object> )
    Inherited, see "Internals" in Mail::Message::Body::Encode

$obj->contentInfoFrom($head)
    Inherited, see "Internals" in Mail::Message::Body

$obj->contentInfoTo($head)
    Inherited, see "Internals" in Mail::Message::Body

$obj->fileLocation( [$begin, $end] )
    Inherited, see "Internals" in Mail::Message::Body

$obj->getTransferEncHandler($type)
    Inherited, see "Internals" in Mail::Message::Body::Encode

$obj->isModified()
    Inherited, see "Internals" in Mail::Message::Body

$obj->load()
    Inherited, see "Internals" in Mail::Message::Body

$obj->modified( [BOOLEAN] )
    Inherited, see "Internals" in Mail::Message::Body

$obj->moveLocation( [$distance] )
    Inherited, see "Internals" in Mail::Message::Body

$obj->read()
    Inherited, see "Internals" in Mail::Message::Body

$obj->tempFilename( [$filename] )
    Returns the name of the temporary file which is used to store this body.

  Error handling
Extends "Error handling" in Mail::Message::Body.

$obj->AUTOLOAD()
    Inherited, see "Error handling" in Mail::Message::Body

$obj->notImplemented()
    Inherited, see "Error handling" in Mail::Reporter

$obj->notImplemented()
    Inherited, see "Error handling" in Mail::Reporter

  Cleanup
Extends "Cleanup" in Mail::Message::Body.

$obj->DESTROY()
    The temporary file is automatically removed when the body is not required anymore. Improves base, see "Cleanup" in Mail::Reporter

DETAILS
Extends "DETAILS" in Mail::Message::Body.

DIAGNOSTICS

Warning: Content-Transfer-Encoding '$te' requires explicit charset, defaulted to utf-8.
    Cast by encode()

Error: cannot concatenate element $which
    Cast by concatenate()

Fault: cannot open $file to write body: $!
    Cast by write()

Fault: cannot read from file $name: $!
    Cast by nrLines()

Fault: cannot read from file $name: $!
    Cast by endsOnNewline()

Fault: cannot read from file $name: $!
    Cast by print()

Fault: cannot read from file $name: $!
    Cast by lines()

Fault: cannot read from file $name: $!
    Cast by string()

Fault: cannot write body to file $name: $!
    Cast by new()

Fault: cannot write to file $name: $!
    Cast by read()

Fault: cannot write to temporary body file $name: $!
    The message body is to be stored in a temporary file (probably because it is a large body), but for the indicated reason, this file cannot be created. Cast by new()

Fault: cannot write to temporary body file $name: $!
    Cast by new()

Warning: charset '$name' is not known.
    The encoding or decoding of a message body encounters a character set which is not understood by Perl's Encode module. Cast by encode()

Error: class $package does not implement method $method.
    Fatal error: the specific $package (or one of its superclasses) does not implement this method where it should. This message means that some other related classes do implement this method however the class at hand does not. Probably you should investigate this and probably inform the author of the package. Cast by notImplemented()

Error: class $package does not implement method $method.
    Fatal error: the specific $package (or one of its superclasses) does not implement this method where it should. This message means that some other related classes do implement this method however the class at hand does not. Probably you should investigate this and probably inform the author of the package. Cast by notImplemented()

Fault: error closing $file after write body: $!
    Cast by write()

Warning: no decoder defined for transfer encoding '$encoding'.
    The data (message body) is encoded in a way which is not currently understood, therefore no decoding (or recoding) can take place. Cast by encode()

Warning: no encoder defined for transfer encoding '$encoding'.
    The data (message body) has been decoded, but the required encoding is unknown. The decoded data is returned. Cast by encode()

Error: no filename parameter for write() body.
    Cast by write()

Error: part number needs multi-part or nested.
    Cast by partNumberOf()

Fault: unable to read file $name for message body file: $!
    A Mail::Message::Body::File object is to be created from a named file, but it is impossible to read that file to retrieve the lines within. Therefore, no copy to a temporary file can be made. Cast by new()

Error: unknown line terminator '$eol'.
    Cast by eol()

SEE ALSO
This module is part of Mail-Message version 4.05, built on April 10, 2026. Website: http://perl.overmeer.net/mailbox/

LICENSE
For contributors see file ChangeLog.

This software is copyright (c) 2001-2026 by Mark Overmeer.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.