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- #
- # $Id: Status.pm,v 1.25 1999/03/20 07:37:35 gisle Exp $
-
- package HTTP::Status;
-
- use strict;
- require 5.002; # becase we use prototypes
-
- =head1 NAME
-
- HTTP::Status - HTTP Status code processing
-
- =head1 SYNOPSIS
-
- use HTTP::Status;
-
- if ($rc != RC_OK) {
- print status_message($rc), "\n";
- }
-
- if (is_success($rc)) { ... }
- if (is_error($rc)) { ... }
- if (is_redirect($rc)) { ... }
-
- =head1 DESCRIPTION
-
- I<HTTP::Status> is a library of routines for defining and
- classifying HTTP status codes for libwww-perl. Status codes are
- used to encode the overall outcome of a HTTP response message. Codes
- correspond to those defined in F<draft-ietf-http-v11-spec-rev-03> (an
- update to RFC 2068).
-
- =head1 CONSTANTS
-
- The following constant functions can be used as mnemonic status code
- names:
-
- RC_CONTINUE (100)
- RC_SWITCHING_PROTOCOLS (101)
-
- RC_OK (200)
- RC_CREATED (201)
- RC_ACCEPTED (202)
- RC_NON_AUTHORITATIVE_INFORMATION (203)
- RC_NO_CONTENT (204)
- RC_RESET_CONTENT (205)
- RC_PARTIAL_CONTENT (206)
-
- RC_MULTIPLE_CHOICES (300)
- RC_MOVED_PERMANENTLY (301)
- RC_FOUND (302)
- RC_SEE_OTHER (303)
- RC_NOT_MODIFIED (304)
- RC_USE_PROXY (305)
- RC_TEMPORARY_REDIRECT (307)
-
- RC_BAD_REQUEST (400)
- RC_UNAUTHORIZED (401)
- RC_PAYMENT_REQUIRED (402)
- RC_FORBIDDEN (403)
- RC_NOT_FOUND (404)
- RC_METHOD_NOT_ALLOWED (405)
- RC_NOT_ACCEPTABLE (406)
- RC_PROXY_AUTHENTICATION_REQUIRED (407)
- RC_REQUEST_TIMEOUT (408)
- RC_CONFLICT (409)
- RC_GONE (410)
- RC_LENGTH_REQUIRED (411)
- RC_PRECONDITION_FAILED (412)
- RC_REQUEST_ENTITY_TOO_LARGE (413)
- RC_REQUEST_URI_TOO_LARGE (414)
- RC_UNSUPPORTED_MEDIA_TYPE (415)
- RC_REQUEST_RANGE_NOT_SATISFIABLE (416)
- RC_EXPECTATION_FAILED (417)
-
- RC_INTERNAL_SERVER_ERROR (500)
- RC_NOT_IMPLEMENTED (501)
- RC_BAD_GATEWAY (502)
- RC_SERVICE_UNAVAILABLE (503)
- RC_GATEWAY_TIMEOUT (504)
- RC_HTTP_VERSION_NOT_SUPPORTED (505)
-
- =cut
-
- #####################################################################
-
- use vars qw(@ISA @EXPORT @EXPORT_OK $VERSION);
-
- require Exporter;
- @ISA = qw(Exporter);
- @EXPORT = qw(is_info is_success is_redirect is_error status_message);
- @EXPORT_OK = qw(is_client_error is_server_error);
- $VERSION = sprintf("%d.%02d", q$Revision: 1.25 $ =~ /(\d+)\.(\d+)/);
-
- # Note also addition of mnemonics to @EXPORT below
-
- my %StatusCode = (
- 100 => 'Continue',
- 101 => 'Switching Protocols',
- 200 => 'OK',
- 201 => 'Created',
- 202 => 'Accepted',
- 203 => 'Non-Authoritative Information',
- 204 => 'No Content',
- 205 => 'Reset Content',
- 206 => 'Partial Content',
- 300 => 'Multiple Choices',
- 301 => 'Moved Permanently',
- 302 => 'Found',
- 303 => 'See Other',
- 304 => 'Not Modified',
- 305 => 'Use Proxy',
- 307 => 'Temporary Redirect',
- 400 => 'Bad Request',
- 401 => 'Unauthorized',
- 402 => 'Payment Required',
- 403 => 'Forbidden',
- 404 => 'Not Found',
- 405 => 'Method Not Allowed',
- 406 => 'Not Acceptable',
- 407 => 'Proxy Authentication Required',
- 408 => 'Request Timeout',
- 409 => 'Conflict',
- 410 => 'Gone',
- 411 => 'Length Required',
- 412 => 'Precondition Failed',
- 413 => 'Request Entity Too Large',
- 414 => 'Request-URI Too Large',
- 415 => 'Unsupported Media Type',
- 416 => 'Request Range Not Satisfiable',
- 417 => 'Expectation Failed',
- 500 => 'Internal Server Error',
- 501 => 'Not Implemented',
- 502 => 'Bad Gateway',
- 503 => 'Service Unavailable',
- 504 => 'Gateway Timeout',
- 505 => 'HTTP Version Not Supported',
- );
-
- my $mnemonicCode = '';
- my ($code, $message);
- while (($code, $message) = each %StatusCode) {
- # create mnemonic subroutines
- $message =~ tr/a-z \-/A-Z__/;
- $mnemonicCode .= "sub RC_$message () { $code }\t";
- # make them exportable
- $mnemonicCode .= "push(\@EXPORT, 'RC_$message');\n";
- }
- # warn $mnemonicCode; # for development
- eval $mnemonicCode; # only one eval for speed
- die if $@;
-
- # backwards compatibility
- *RC_MOVED_TEMPORARILY = \&RC_FOUND; # 302 was renamed in the standard
- push(@EXPORT, "RC_MOVED_TEMPORARILY");
-
-
- =head1 FUNCTIONS
-
- The following additional functions are provided. Most of them are
- exported by default.
-
- =over 4
-
- =item status_message($code)
-
- The status_message() function will translate status codes to human
- readable strings. The string is the same as found in the constant
- names above. If the $code is unknown, then C<undef> is returned.
-
- =cut
-
- sub status_message ($)
- {
- $StatusCode{$_[0]};
- }
-
- =item is_info($code)
-
- Return TRUE if C<$code> is an I<Informational> status code. This
- class of status code indicates a provisional response which can't have
- any content.
-
- =item is_success($code)
-
- Return TRUE if C<$code> is a I<Successful> status code.
-
- =item is_redirect($code)
-
- Return TRUE if C<$code> is a I<Redirection> status code. This class of
- status code indicates that further action needs to be taken by the
- user agent in order to fulfill the request.
-
- =item is_error($code)
-
- Return TRUE if C<$code> is an I<Error> status code. The function
- return TRUE for both client error or a server error status codes.
-
- =item is_client_error($code)
-
- Return TRUE if C<$code> is an I<Client Error> status code. This class
- of status code is intended for cases in which the client seems to have
- erred.
-
- This function is B<not> exported by default.
-
- =item is_server_error($code)
-
- Return TRUE if C<$code> is an I<Server Error> status code. This class
- of status codes is intended for cases in which the server is aware
- that it has erred or is incapable of performing the request.
-
- This function is B<not> exported by default.
-
- =back
-
- =cut
-
- sub is_info ($) { $_[0] >= 100 && $_[0] < 200; }
- sub is_success ($) { $_[0] >= 200 && $_[0] < 300; }
- sub is_redirect ($) { $_[0] >= 300 && $_[0] < 400; }
- sub is_error ($) { $_[0] >= 400 && $_[0] < 600; }
- sub is_client_error ($) { $_[0] >= 400 && $_[0] < 500; }
- sub is_server_error ($) { $_[0] >= 500 && $_[0] < 600; }
-
- 1;
-
- =head1 BUGS
-
- Wished @EXPORT_OK had been used instead of @EXPORT in the beginning.
- Now too much is exported by default.
-
- =cut
-