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HTTP::Message(3)      User Contributed Perl Documentation     HTTP::Message(3)

       HTTP::Message - HTTP style message (base class)

        use base 'HTTP::Message';

       An "HTTP::Message" object contains some headers and a content body.
       The following methods are available:

       $mess = HTTP::Message->new
       $mess = HTTP::Message->new( $headers )
       $mess = HTTP::Message->new( $headers, $content )
           This constructs a new message object.  Normally you would want
           construct "HTTP::Request" or "HTTP::Response" objects instead.

           The optional $header argument should be a reference to an
           "HTTP::Headers" object or a plain array reference of key/value
           pairs.  If an "HTTP::Headers" object is provided then a copy of it
           will be embedded into the constructed message, i.e. it will not be
           owned and can be modified afterwards without affecting the message.

           The optional $content argument should be a string of bytes.

       $mess = HTTP::Message->parse( $str )
           This constructs a new message object by parsing the given string.

           Returns the embedded "HTTP::Headers" object.

       $mess->headers_as_string( $eol )
           Call the as_string() method for the headers in the message.  This
           will be the same as


           but it will make your program a whole character shorter :-)

       $mess->content( $bytes )
           The content() method sets the raw content if an argument is given.
           If no argument is given the content is not touched.  In either case
           the original raw content is returned.

           Note that the content should be a string of bytes.  Strings in perl
           can contain characters outside the range of a byte.  The "Encode"
           module can be used to turn such strings into a string of bytes.

       $mess->add_content( $bytes )
           The add_content() methods appends more data bytes to the end of the
           current content buffer.

       $mess->add_content_utf8( $string )
           The add_content_utf8() method appends the UTF-8 bytes representing
           the string to the end of the current content buffer.

       $mess->content_ref( \$bytes )
           The content_ref() method will return a reference to content buffer
           string.  It can be more efficient to access the content this way if
           the content is huge, and it can even be used for direct
           manipulation of the content, for instance:

             ${$res->content_ref} =~ s/\bfoo\b/bar/g;

           This example would modify the content buffer in-place.

           If an argument is passed it will setup the content to reference
           some external source.  The content() and add_content() methods will
           automatically dereference scalar references passed this way.  For
           other references content() will return the reference itself and
           add_content() will refuse to do anything.

           This returns the charset used by the content in the message.  The
           charset is either found as the charset attribute of the
           "Content-Type" header or by guessing.

           See http://www.w3.org/TR/REC-html40/charset.html#spec-char-encoding
           for details about how charset is determined.

       $mess->decoded_content( %options )
           Returns the content with any "Content-Encoding" undone and the raw
           content encoded to perl's Unicode strings.  If the
           "Content-Encoding" or "charset" of the message is unknown this
           method will fail by returning "undef".

           The following options can be specified.

               This override the charset parameter for text content.  The
               value "none" can used to suppress decoding of the charset.

               This override the default charset guessed by content_charset()
               or if that fails "ISO-8859-1".

               Abort decoding if malformed characters is found in the content.
               By default you get the substitution character ("\x{FFFD}") in
               place of malformed characters.

               If TRUE then raise an exception if not able to decode content.
               Reason might be that the specified "Content-Encoding" or
               "charset" is not supported.  If this option is FALSE, then
               decoded_content() will return "undef" on errors, but will still
               set $@.

               If TRUE then a reference to decoded content is returned.  This
               might be more efficient in cases where the decoded content is
               identical to the raw content as no data copying is required in
               this case.

           This returns the encoding identifiers that decoded_content() can
           process.  In scalar context returns a comma separated string of

           This value is suitable for initializing the "Accept-Encoding"
           request header field.

           This method tries to replace the content of the message with the
           decoded version and removes the "Content-Encoding" header.  Returns
           TRUE if successful and FALSE if not.

           If the message does not have a "Content-Encoding" header this
           method does nothing and returns TRUE.

           Note that the content of the message is still bytes after this
           method has been called and you still need to call decoded_content()
           if you want to process its content as a string.

       $mess->encode( $encoding, ... )
           Apply the given encodings to the content of the message.  Returns
           TRUE if successful. The "identity" (non-)encoding is always
           supported; other currently supported encodings, subject to
           availability of required additional modules, are "gzip", "deflate",
           "x-bzip2" and "base64".

           A successful call to this function will set the "Content-Encoding"

           Note that "multipart/*" or "message/*" messages can't be encoded
           and this method will croak if you try.

       $mess->parts( @parts )
       $mess->parts( \@parts )
           Messages can be composite, i.e. contain other messages.  The
           composite messages have a content type of "multipart/*" or
           "message/*".  This method give access to the contained messages.

           The argumentless form will return a list of "HTTP::Message"
           objects.  If the content type of $msg is not "multipart/*" or
           "message/*" then this will return the empty list.  In scalar
           context only the first object is returned.  The returned message
           parts should be regarded as read-only (future versions of this
           library might make it possible to modify the parent by modifying
           the parts).

           If the content type of $msg is "message/*" then there will only be
           one part returned.

           If the content type is "message/http", then the return value will
           be either an "HTTP::Request" or an "HTTP::Response" object.

           If an @parts argument is given, then the content of the message
           will be modified. The array reference form is provided so that an
           empty list can be provided.  The @parts array should contain
           "HTTP::Message" objects.  The @parts objects are owned by $mess
           after this call and should not be modified or made part of other

           When updating the message with this method and the old content type
           of $mess is not "multipart/*" or "message/*", then the content type
           is set to "multipart/mixed" and all other content headers are

           This method will croak if the content type is "message/*" and more
           than one part is provided.

       $mess->add_part( $part )
           This will add a part to a message.  The $part argument should be
           another "HTTP::Message" object.  If the previous content type of
           $mess is not "multipart/*" then the old content (together with all
           content headers) will be made part #1 and the content type made
           "multipart/mixed" before the new part is added.  The $part object
           is owned by $mess after this call and should not be modified or
           made part of other messages.

           There is no return value.

           Will clear the headers and set the content to the empty string.
           There is no return value

       $mess->protocol( $proto )
           Sets the HTTP protocol used for the message.  The protocol() is a
           string like "HTTP/1.0" or "HTTP/1.1".

           Returns a copy of the message object.

       $mess->as_string( $eol )
           Returns the message formatted as a single string.

           The optional $eol parameter specifies the line ending sequence to
           use.  The default is "\n".  If no $eol is given then as_string will
           ensure that the returned string is newline terminated (even when
           the message content is not).  No extra newline is appended if an
           explicit $eol is passed.

       $mess->dump( %opt )
           Returns the message formatted as a string.  In void context print
           the string.

           This differs from "$mess->as_string" in that it escapes the bytes
           of the content so that it's safe to print them and it limits how
           much content to print.  The escapes syntax used is the same as for
           Perl's double quoted strings.  If there is no content the string
           "(no content)" is shown in its place.

           Options to influence the output can be passed as key/value pairs.
           The following options are recognized:

           maxlength => $num
               How much of the content to show.  The default is 512.  Set this
               to 0 for unlimited.

               If the content is longer then the string is chopped at the
               limit and the string "...\n(### more bytes not shown)"

           prefix => $str
               A string that will be prefixed to each line of the dump.

       All methods unknown to "HTTP::Message" itself are delegated to the
       "HTTP::Headers" object that is part of every message.  This allows
       convenient access to these methods.  Refer to HTTP::Headers for details
       of these methods:

           $mess->header( $field => $val )
           $mess->push_header( $field => $val )
           $mess->init_header( $field => $val )
           $mess->remove_header( $field )
           $mess->scan( \&doit )


       Copyright 1995-2004 Gisle Aas.

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

perl v5.12.1                      2009-11-21                  HTTP::Message(3)

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