NAME

Courriel::Header::ContentType - The content type for an email part

VERSION

version 0.42

SYNOPSIS

    my $ct = $part->content_type();
    print $ct->mime_type();
    print $ct->charset();

    my %attr = $ct->attributes();
    while ( my ( $k, $v ) = each %attr ) {
        print "$k => $v\n";
    }

DESCRIPTION

This class represents the contents of a "Content-Type" header attached to an email part. Such headers always include a mime type, and may also include additional information such as a charset or other attributes.

Here are some typical headers:

  Content-Type: text/plain; charset=utf-8

  Content-Type: multipart/alternative; boundary=abcdefghijk

  Content-Type: image/jpeg; name="Filename.jpg"

API

This class supports the following methods:

Courriel::Header::ContentType->new_from_value( ... )

This takes two parameters, name and value. The name is optional, and defaults to "Content-Type".

The value is parsed and split up into the mime type and attributes.

Courriel::Header::ContentType->new( ... )

This method creates a new object. It accepts the following parameters:

• name

  This defaults to 'Content-Type'.

• value

  This is the full header value.

• mime_type

  A string like "text/plain" or "multipart/alternative". This is required.

• attributes

  A hash reference of attributes from the header, such as a boundary, charset, etc. The keys are attribute names and the values can either be strings or Courriel::HeaderAttribute objects. Values which are strings will be inflated into objects by the constructor.

  This is optional, and can be an empty hash reference or omitted entirely.

$ct->name()

The header name, usually "Content-Type".

$ct->value()

The raw header value.

$ct->mime_type()

Returns the mime type value passed to the constructor. However, this value will be in all lower-case, regardless of the original casing passed to the constructor.

$ct->charset()

Returns the charset for the content type, which will be the value found in the attributes, if one exists.

$ct->attributes()

Returns a hash (not a reference) of the attributes passed to the constructor.

Attributes are Courriel::HeaderAttribute objects.

The keys of the hash are all lower case, though the original casing is preserved in the name() returned by the Courriel::HeaderAttribute object.

$ct->is_binary()

Returns true unless the attachment looks like text data. Currently, this means that is has a charset defined and the charset is not "binary".

$ct->attribute($key)

Given a key, returns the named Courriel::HeaderAttribute object. Obviously, this value can be undef if the attribute doesn't exist. Name lookup is case-insensitive.

$ct->attribute_value($key)

Given a key, returns the named attribute's value as a string. Obviously, this value can be undef if the attribute doesn't exist. Name lookup is case-insensitive.

The attribute is a Courriel::HeaderAttribute object.

$ct->as_header_value()

Returns the object as a string suitable for a header value (but not folded). Note that this uses the original casing of the mime type as passed to the constructor.

EXTENDS

This class extends Courriel::Header.

ROLES

This class does the Courriel::Role::HeaderWithAttributes role.

SUPPORT

Bugs may be submitted through the RT bug tracker (or bug-courriel@rt.cpan.org).

I am also usually active on IRC as 'drolsky' on irc://irc.perl.org.

AUTHOR

Dave Rolsky <autarch@urth.org>

COPYRIGHT AND LICENCE

This software is Copyright (c) 2016 by Dave Rolsky.

This is free software, licensed under:

  The Artistic License 2.0 (GPL Compatible)

cpanm Courriel

perl -MCPAN -e shell
install Courriel