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);

# FCGI_Record
$octets = build_record($type, $request_id);
$octets = build_record($type, $request_id, $content);
$record = parse_record($octets);
$record = parse_record_body($type, $request_id, $content);

# Stream
$octets = build_stream($type, $request_id, $octets);
$octets = build_stream($type, $request_id, $octets, $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

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. ID 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. Typically this is the CGI environ that the application expects.
$stdin (optional): A string of octets containing the FCGI_STDIN data. This should only be provided if $role is set to either FCGI_RESPONDER or FCGI_FILTER. Maybe undef or empty. Stream is terminated if provided.
$data (optional): A string of octets containing the FCGI_DATA data. This should only be provided if $role is set to FCGI_FILTER. Maybe undef or empty. Stream is terminated if provided.

Returns

$octets: A string of octets containing the begin request 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. ID 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 data. Maybe undef or empty. Stream is terminated if provided.
$stderr (optional): A string of octets containing the FCGI_STDERR data. Maybe undef or empty. Stream is terminated if provided.

Returns

$octets: A string of octets containing the end request 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. May be undef.

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. May be undef.
$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 undef or 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.

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);
print $header->{type};
print $header->{request_id};

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

$record = parse_record($octets);

Arguments

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

Returns

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

FCGI_BEGIN_REQUEST

role
flags

FCGI_END_REQUEST

app_status
protocol_status

FCGI_PARAMS

FCGI_STDIN

FCGI_DATA

FCGI_STDOUT

FCGI_STDERR

content: A string of octets containing the content of the stream. Can be empty but not undef.

FCGI_GET_VALUES

FCGI_GET_VALUES_RESULT

values: A hash reference containing name-value pairs.

FCGI_UNKNOWN_TYPE

unknown_type

parse_record_body

Parses a FCGI_Record body.

Usage

$record = parse_record_body($type, $request_id, $content);

Arguments

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

Returns

Returns a hash reference containing the FCGI_Record components. See "parse_record".

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_type_name

Usage

$name = get_type_name($type);

Arguments

$type: An unsigned 8-bit integer.

Returns

$name: A string containing the name of the type.

get_role_name

Usage

$name = get_role_name($type);

Arguments

$role: An unsigned 16-bit integer.

Returns

$name: A string containing the name of the role.

get_protocol_status_name

Usage

$name = get_protocol_status_name($protocol_status);

Arguments

$protocol_status: An unsigned 8-bit integer.

Returns

$name: A string containing the name of the protocol status.

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 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 program is free software, you can redistribute it and/or modify it under the same terms as Perl itself.

To install Net::FastCGI, copy and paste the appropriate command in to your terminal.

cpanm

cpanm Net::FastCGI

CPAN shell

perl -MCPAN -e shell
install Net::FastCGI

For more information on module installation, please visit the detailed CPAN module installation guide.

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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

parse_begin_request_body

parse_end_request_body

parse_header

parse_params

parse_record

parse_record_body

parse_unknown_type_body

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

Module Install Instructions