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


HTTP::MultiPartParser - HTTP MultiPart Parser


    $parser = HTTP::MultiPartParser->new(
        boundary  => $boundary,
        on_header => $on_header,
        on_body   => $on_body,
    while ($octets = read_octets_from_body()) {


This class provides a low-level API for processing MultiPart MIME data streams conforming to MultiPart types as defined in RFC 2616 <>.



    $parser = HTTP::MultiPartParser->new( %attributes );

This constructor returns a instance of "HTTP::MultiPartParser". Valid attributes inculde:

  • "boundary" (Mandatory)

        boundary => $value

    The unquoted and unescaped boundary parameter value from the Content-Type header field. The boundary parameter value consist of a restricted set of characters as defined in RFC 2046 <>.

        DIGIT / ALPHA / "'" / "(" / ")" /
        "+" / "_" / "," / "-" / "." /
        "/" / ":" / "=" / "?"
  • "on_header" (Mandatory)

        on_header => $callback->($header)

    This callback will be invoked when the header of a part has successfully been received. The callback will only be invoked once for each part.

  • "on_header_as"

        on_header_as => 'unparsed' | 'lines'

    Defines the $header value for the "on_header" callback.

  • "unparsed"

    Callback invoked with an octet string containing the unparsed header.

  • "lines"

    Callback invoked with an ARRAY reference, where each element of the array is a header line. Folding whitespace is removed from all lines and header continuation lines are unwrapped.

  • "on_body" (Mandatory)

        on_body => $callback->($chunk, $final)

    This callback will be invoked when there is any data available for the body of a part. The callback may be invoked multiple times for each part.

  • "on_error"

        on_error => $callback->($message)

    This callback will be invoked anytime an error occurs in the parser. After receiving an error the parser is no longer useful in its current state.

  • "max_preamble_size"

        max_preamble_size => 32768
  • "max_header_size"

        max_header_size => 32768



Parses the given octets.



Finish the parsing.



Resets the state of the parser.


    $boolean = $parser->is_aborted;

Returns true if an error has occurred in the parser.


(F) Usage: %s
Method called with wrong number of arguments.



Bugs / Feature Requests

Please report any bugs or feature requests through the issue tracker at <>. You will be notified automatically of any progress on your issue.


This is open source software. The code repository is available for public review and contribution under the terms of the license.


    git clone


Christian Hansen ""


Copyright 2012-2017 by Christian Hansen.

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

2019-08-09 perl v5.40.0