Net::FastCGI::Protocol(3pm)

User Contributed Perl Documentation

Net::FastCGI::Protocol(3pm)

NAME¶

Net::FastCGI::Protocol - Provides functions to build and parse FastCGI messages.

SYNOPSIS¶

    # FCGI_Header
    $octets = build_header($type, $request_id, $content_length, $padding_length);
    @values = parse_header($octets);
    $header = parse_header($octets);
    
    # FCGI_BeginRequestBody
    $octets = build_begin_request_body($role, $flags);
    @values = parse_begin_request_body($octets);
    
    # FCGI_EndRequestBody
    $octets = build_end_request_body($app_status, $protocol_status);
    @values = parse_end_request_body($octets);
    
    # FCGI_UnknownTypeBody
    $octets = build_unknown_type_body($type);
    @values = parse_unknown_type_body($octets);
    
    # FCGI_BeginRequestRecord
    $octets = build_begin_request_record($request_id, $role, $flags);
    
    # FCGI_EndRequestRecord
    $octets = build_end_request_record($request_id, $app_status, $protocol_status);
    
    # FCGI_UnknownTypeRecord
    $octets = build_unknown_type_record($type);
    
    # FCGI_NameValuePair's
    $octets = build_params($params);
    $params = parse_params($octets);
    $bool   = check_params($octets);
    
    # FCGI_Record
    $octets = build_record($type, $request_id);
    $octets = build_record($type, $request_id, $content);
    @values = parse_record($octets);
    $record = parse_record($octets);
    $record = parse_record_body($type, $request_id, $content);
    
    # FCGI_Record Debugging / Tracing
    $string = dump_record($octets);
    $string = dump_record_body($type, $request_id, $content);
    
    # FCGI_Record Stream
    $octets = build_stream($type, $request_id, $content);
    $octets = build_stream($type, $request_id, $content, $terminate);
    
    # Begin Request
    $octets = build_begin_request($request_id, $role, $flags, $params);
    $octets = build_begin_request($request_id, $role, $flags, $params, $stdin);
    $octets = build_begin_request($request_id, $role, $flags, $params, $stdin, $data);
    
    # End Request
    $octets = build_end_request($request_id, $app_status, $protocol_status);
    $octets = build_end_request($request_id, $app_status, $protocol_status, $stdout);
    $octets = build_end_request($request_id, $app_status, $protocol_status, $stdout, $stderr);

DESCRIPTION¶

Provides functions to build and parse FastCGI messages.

FUNCTIONS¶

Please note that all functions in this package expects octets, not unicode strings. It's the callers responsibility to ensure this. If any of theese functions is called with unicode strings containing code points above 255, they will most likely produce malformed messages.

build_begin_request¶

Builds a Begin Request message.

Usage

    $octets = build_begin_request($request_id, $role, $flags, $params);
    $octets = build_begin_request($request_id, $role, $flags, $params, $stdin);
    $octets = build_begin_request($request_id, $role, $flags, $params, $stdin, $data);

Arguments

$request_id: An unsigned 16-bit integer. Identifier of the request.
$role: An unsigned 16-bit integer. This should be set to either "FCGI_RESPONDER", "FCGI_AUTHORIZER" or "FCGI_FILTER".
$flags: An unsigned 8-bit integer. This should be set to either 0 or contain the mask "FCGI_KEEP_CONN" if a persistent connection is desired.
$params: A hash reference containing name-value pairs. This is the CGI environ that the application expects.
$stdin (optional): A string of octets containing the "FCGI_STDIN" content. This should only be provided if $role is set to either "FCGI_RESPONDER" or "FCGI_FILTER". The "FCGI_STDIN" stream is terminated if provided.
$data (optional): A string of octets containing the "FCGI_DATA" content. This should only be provided if $role is set to "FCGI_FILTER". The "FCGI_DATA" stream is terminated if provided.

Returns

$octets: A string of octets containing the message.

build_begin_request_body¶

Builds a "FCGI_BeginRequestBody".

Usage

    $octets = build_begin_request_body($role, $flags);

Arguments

$role: An unsigned 16-bit integer.
$flags: An unsigned 8-bit integer.

Returns

$octets: A string of octets containing the body. String is 8 octets in length.

build_begin_request_record¶

Builds a "FCGI_BeginRequestRecord".

Usage

    $octets = build_begin_request_record($request_id, $role, $flags);

Arguments

$request_id: An unsigned 16-bit integer.
$role: An unsigned 16-bit integer.
$flags: An unsigned 8-bit integer.

Returns

$octets: A string of octets containing the record. String is 16 octets in length.

build_end_request¶

Builds a End Request message

Usage

    $octets = build_end_request($request_id, $app_status, $protocol_status);
    $octets = build_end_request($request_id, $app_status, $protocol_status, $stdout);
    $octets = build_end_request($request_id, $app_status, $protocol_status, $stdout, $stderr);

Arguments

$request_id: An unsigned 16-bit integer. Identifier of the request.
$app_status: An unsigned 32-bit integer. Application status code of the request.
$protocol_status: An unsigned 8-bit integer. This should be set to either "FCGI_REQUEST_COMPLETE", "FCGI_CANT_MPX_CONN", "FCGI_OVERLOADED" or "FCGI_UNKNOWN_ROLE".
$stdout (optional): A string of octets containing the "FCGI_STDOUT" content. The "FCGI_STDOUT" stream is terminated if provided.
$stderr (optional): A string of octets containing the "FCGI_STDERR" content. The "FCGI_STDERR" stream is terminated if provided.

Returns

$octets: A string of octets containing the message.

Note

This function is equivalent to "build_end_request_record()" if called without $stdout and $stderr.

build_end_request_body¶

Builds a "FCGI_EndRequestBody".

Usage

    $octets = build_end_request_body($app_status, $protocol_status);

Arguments

$app_status: An unsigned 32-bit integer.
$protocol_status: An unsigned 8-bit integer.

Returns

$octets: A string of octets containing the body. String is 8 octets in length.

build_end_request_record¶

Builds a "FCGI_EndRequestRecord".

Usage

    $octets = build_end_request_record($request_id, $app_status, $protocol_status);

Arguments

$request_id: An unsigned 16-bit integer.
$app_status: An unsigned 32-bit integer.
$protocol_status: An unsigned 8-bit integer.

Returns

$octets: A string of octets containing the record. String is 16 octets in length.

build_header¶

Builds a "FCGI_Header".

Usage

    $octets = build_header($type, $request_id, $content_length, $padding_length);

Arguments

$type: An unsigned 8-bit integer.
$request_id: An unsigned 16-bit integer.
$content_length: An unsigned 16-bit integer.
$padding_length: An unsigned 8-bit integer.

Returns

$octets: A string of octets containing the header. String is 8 octets in length.

build_params¶

Builds "FCGI_NameValuePair"'s.

Usage

    $octets = build_params($params);

Arguments

$params: A hash reference containing name-value pairs.

Returns

$octets

build_record¶

Builds a "FCGI_Record".

Usage

    $octets = build_record($type, $request_id);
    $octets = build_record($type, $request_id, $content);

Arguments

$type: An unsigned 8-bit integer.
$request_id: An unsigned 16-bit integer.
$content (optional): A string of octets containing the content, cannot exceed 65535 octets in length.

Returns

$octets: A string of octets containing the record.

Note

Follows the recommendation in specification and pads the record by 8-(content_length mod 8) zero-octets.

build_stream¶

Builds a series of stream records.

Usage

    $octets = build_stream($type, $request_id, $content);
    $octets = build_stream($type, $request_id, $content, $terminate);

Arguments

$type: An unsigned 8-bit integer.
$request_id: An unsigned 16-bit integer.
$content: A string of octets containing the stream content.
$terminate (optional): A boolean indicating whether or not the stream should be terminated. Defaults to false.

Returns

$octets: A string of octets containing the stream.

Note

Stream is not terminated if $content is empty unless $terminate is set.

$content is split in segment sizes of 32760 octets (32768 - FCGI_HEADER_LEN).

build_unknown_type_body¶

Builds a "FCGI_UnknownTypeBody".

Usage

    $octets = build_unknown_type_body($type);

Arguments

$type: An unsigned 8-bit integer.

Returns

$octets: A string of octets containing the body. String is 8 octets in length.

build_unknown_type_record¶

Builds a "FCGI_UnknownTypRecord".

Usage

    $octets = build_unknown_type_record($type);

Arguments

$type: An unsigned 8-bit integer.

Returns

$octets: A string of octets containing the record. String is 16 octets in length.

check_params¶

Determine whether or not params is well-formed.

Usage

    $boolean = check_params($octets);

Arguments

$octets: A string of octets containing "FCGI_NameValuePair"'s.

Returns

$boolean: A boolean indicating whether or not $octets consist of well-formed "FCGI_NameValuePair"'s.

dump_record¶

Dump a "FCGI_Record".

Usage

    $string = dump_record($octets);

Arguments

$octets: A string of octets containing at least one record.

Returns

$string: A short (less than 100 characters) string representation of the record in printable US-ASCII.

dump_record_body¶

Dump a "FCGI_Record".

Usage

    $string = dump_record_body($type, $request_id);
    $string = dump_record_body($type, $request_id, $content);

Arguments

$type: An unsigned 8-bit integer.
$request_id: An unsigned 16-bit integer.
$content (optional): A string of octets containing the content.

Returns

$string: A short (less than 100 characters) string representation of the record in printable US-ASCII.

parse_begin_request_body¶

Parses a "FCGI_BeginRequestBody".

Usage

    ($role, $flags) = parse_begin_request_body($octets);

Arguments

$octets: A string of octets containing the body, must be greater than or equal to 8 octets in length.

Returns

$role: An unsigned 16-bit integer.
$flags: An unsigned 8-bit integer.

parse_end_request_body¶

Parses a "FCGI_EndRequestBody".

Usage

    ($app_status, $protocol_status) = parse_end_request_body($octets);

Arguments

$octets: A string of octets containing the body, must be greater than or equal to 8 octets in length.

Returns

$app_status: An unsigned 32-bit integer.
$flags: An unsigned 8-bit integer.

parse_header¶

Parses a "FCGI_Header".

Usage

    ($type, $request_id, $content_length, $padding_length)
      = parse_header($octets);
    
    $header = parse_header($octets);
    say $header->{type};
    say $header->{request_id};
    say $header->{content_length};
    say $header->{padding_length};

Arguments

$octets: A string of octets containing the header, must be greater than or equal to 8 octets in length.

Returns

In list context:

$type: An unsigned 8-bit integer.
$request_id: An unsigned 16-bit integer.
$content_length: An unsigned 16-bit integer.
$padding_length: An unsigned 8-bit integer.

In scalar context a hash reference containing above variable names as keys.

parse_params¶

Parses "FCGI_NameValuePair"'s.

Usage

    $params = parse_params($octets);

Arguments

$octets: A string of octets containing "FCGI_NameValuePair"'s.

Returns

$params: A hash reference containing name-value pairs.

parse_record¶

Parses a "FCGI_Record".

Usage

    ($type, $request_id, $content)
      = parse_record($octets);
    $record = parse_record($octets);
    say $record->{type};
    say $record->{request_id};

Arguments

$octets: A string of octets containing at least one record.

Returns

In list context:

$type: An unsigned 8-bit integer.
$request_id: An unsigned 16-bit integer.
$content: A string of octets containing the record content.

In scalar context a hash reference containing the "FCGI_Record" components. See "parse_record_body".

parse_record_body¶

Parses a "FCGI_Record".

Usage

    $record = parse_record_body($type, $request_id, $content);
    say $record->{type};
    say $record->{request_id};

Arguments

$type: An unsigned 8-bit integer.
$request_id: An unsigned 16-bit integer.
$content: A string of octets containing the record content.

Returns

A hash reference which represents the "FCGI_Record". The content depends on the type of record. All record types have the keys: "type" and "request_id".

"FCGI_BEGIN_REQUEST"

"role": An unsigned 16-bit integer.
"flags": An unsigned 8-bit integer.

"FCGI_END_REQUEST"

"app_status": An unsigned 32-bit integer.
"protocol_status": An unsigned 8-bit integer.

"FCGI_PARAMS"
"FCGI_STDIN"
"FCGI_DATA"
"FCGI_STDOUT"
"FCGI_STDERR"

"content": A string of octets containing the content of the stream.

"FCGI_GET_VALUES"
"FCGI_GET_VALUES_RESULT"

"values": A hash reference containing name-value pairs.

"FCGI_UNKNOWN_TYPE"

"unknown_type": An unsigned 8-bit integer.

parse_unknown_type_body¶

Parses a "FCGI_UnknownTypeBody".

Usage

    $type = parse_unknown_type_body($octets);

Arguments

$octets: $octets must be greater than or equal to 8 octets in length.

Returns

$type: An unsigned 8-bit integer.

get_record_length¶

Usage

    $length = get_record_length($octets);

Arguments

$octets: A string of octets containing at least one "FCGI_Header".

Returns

$length: An unsigned integer containing the length of record in octets. If $octets contains insufficient octets "(< FCGI_HEADER_LEN)" 0 is returned.

get_type_name¶

Usage

    $name = get_type_name($type);
    $name = get_type_name(FCGI_BEGIN_REQUEST);  # 'FCGI_BEGIN_REQUEST'
    $name = get_type_name(255);                 # '0xFF'

Arguments

$type: An unsigned 8-bit integer.

Returns

$name: A string containing the name of the type. If $type is not a known v1.0 type, a hexadecimal value is returned.

Note

See also ":name" in Net::FastCGI::Constant.

get_role_name¶

Usage

    $name = get_role_name($type);
    $name = get_role_name(FCGI_RESPONDER);  # 'FCGI_RESPONDER'
    $name = get_role_name(65535);           # '0xFFFF'

Arguments

$role: An unsigned 16-bit integer.

Returns

$name: A string containing the name of the role. If $role is not a known v1.0 role, a hexadecimal value is returned.

Note

See also ":name" in Net::FastCGI::Constant.

get_protocol_status_name¶

Usage

    $name = get_protocol_status_name($protocol_status);
    $name = get_protocol_status_name(FCGI_REQUEST_COMPLETE);    # 'FCGI_REQUEST_COMPLETE'
    $name = get_protocol_status_name(255);                      # '0xFF'

Arguments

$protocol_status: An unsigned 8-bit integer.

Returns

$name: A string containing the name of the protocol status. If $protocol_status is not a known v1.0 protocol status code, a hexadecimal value is returned.

Note

See also ":name" in Net::FastCGI::Constant.

is_known_type¶

Usage

    $boolean = is_known_type($type);

Arguments

$type: An unsigned 8-bit integer.

Returns

$boolean: A boolean indicating whether or not $type is a known FastCGI v1.0 type.

is_management_type¶

Usage

    $boolean = is_management_type($type);

Arguments

$type: An unsigned 8-bit integer.

Returns

$boolean: A boolean indicating whether or not $type is a management type.

is_discrete_type¶

Usage

    $boolean = is_discrete_type($type);

Arguments

$type: An unsigned 8-bit integer.

Returns

$boolean: A boolean indicating whether or not $type is a discrete type.

is_stream_type¶

Usage

    $boolean = is_stream_type($type);

Arguments

$type: An unsigned 8-bit integer.

Returns

$boolean: A boolean indicating whether or not $type is a stream type.

EXPORTS¶

None by default. All functions can be exported using the ":all" tag or individually.

DIAGNOSTICS¶

(F) Usage: %s: Subroutine called with wrong number of arguments.
(F) Invalid Argument: %s
(F) FastCGI: Insufficient number of octets to parse %s
(F) FastCGI: Malformed record %s
(F) FastCGI: Protocol version mismatch (0x%.2X)

AUTHOR¶

Christian Hansen "chansen@cpan.org"

COPYRIGHT¶

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

2022-11-21

perl v5.36.0

Source file:	Net::FastCGI::Protocol.3pm.en.gz (from libnet-fastcgi-perl 0.14-2)
Source last updated:	2022-11-21T13:09:26Z
Converted to HTML:	2024-10-21T18:28:06Z

NAME¶

SYNOPSIS¶

DESCRIPTION¶

FUNCTIONS¶

build_begin_request¶

build_begin_request_body¶

build_begin_request_record¶

build_end_request¶

build_end_request_body¶

build_end_request_record¶

build_header¶

build_params¶

build_record¶

build_stream¶

build_unknown_type_body¶

build_unknown_type_record¶

check_params¶

dump_record¶

dump_record_body¶

parse_begin_request_body¶

parse_end_request_body¶

parse_header¶

parse_params¶

parse_record¶

parse_record_body¶

parse_unknown_type_body¶

get_record_length¶

get_type_name¶

get_role_name¶

get_protocol_status_name¶

is_known_type¶

is_management_type¶

is_discrete_type¶

is_stream_type¶

EXPORTS¶

DIAGNOSTICS¶

SEE ALSO¶

AUTHOR¶

COPYRIGHT¶