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.\" ========================================================================
.\"
.IX Title "HTTP::Status 3"
.TH HTTP::Status 3 "2018-06-05" "perl v5.16.3" "User Contributed Perl Documentation"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
HTTP::Status \- HTTP Status code processing
.SH "VERSION"
.IX Header "VERSION"
version 6.18
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& use HTTP::Status qw(:constants :is status_message);
\&
\& if ($rc != HTTP_OK) {
\& print status_message($rc), "\en";
\& }
\&
\& if (is_success($rc)) { ... }
\& if (is_error($rc)) { ... }
\& if (is_redirect($rc)) { ... }
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fIHTTP::Status\fR is a library of routines for defining and
classifying \s-1HTTP\s0 status codes for libwww-perl. Status codes are
used to encode the overall outcome of an \s-1HTTP\s0 response message. Codes
correspond to those defined in \s-1RFC 2616\s0 and \s-1RFC 2518.\s0
.SH "CONSTANTS"
.IX Header "CONSTANTS"
The following constant functions can be used as mnemonic status code
names. None of these are exported by default. Use the \f(CW\*(C`:constants\*(C'\fR
tag to import them all.
.PP
.Vb 4
\& HTTP_CONTINUE (100)
\& HTTP_SWITCHING_PROTOCOLS (101)
\& HTTP_PROCESSING (102)
\& HTTP_EARLY_HINTS (103)
\&
\& HTTP_OK (200)
\& HTTP_CREATED (201)
\& HTTP_ACCEPTED (202)
\& HTTP_NON_AUTHORITATIVE_INFORMATION (203)
\& HTTP_NO_CONTENT (204)
\& HTTP_RESET_CONTENT (205)
\& HTTP_PARTIAL_CONTENT (206)
\& HTTP_MULTI_STATUS (207)
\& HTTP_ALREADY_REPORTED (208)
\&
\& HTTP_IM_USED (226)
\&
\& HTTP_MULTIPLE_CHOICES (300)
\& HTTP_MOVED_PERMANENTLY (301)
\& HTTP_FOUND (302)
\& HTTP_SEE_OTHER (303)
\& HTTP_NOT_MODIFIED (304)
\& HTTP_USE_PROXY (305)
\& HTTP_TEMPORARY_REDIRECT (307)
\& HTTP_PERMANENT_REDIRECT (308)
\&
\& HTTP_BAD_REQUEST (400)
\& HTTP_UNAUTHORIZED (401)
\& HTTP_PAYMENT_REQUIRED (402)
\& HTTP_FORBIDDEN (403)
\& HTTP_NOT_FOUND (404)
\& HTTP_METHOD_NOT_ALLOWED (405)
\& HTTP_NOT_ACCEPTABLE (406)
\& HTTP_PROXY_AUTHENTICATION_REQUIRED (407)
\& HTTP_REQUEST_TIMEOUT (408)
\& HTTP_CONFLICT (409)
\& HTTP_GONE (410)
\& HTTP_LENGTH_REQUIRED (411)
\& HTTP_PRECONDITION_FAILED (412)
\& HTTP_REQUEST_ENTITY_TOO_LARGE (413)
\& HTTP_REQUEST_URI_TOO_LARGE (414)
\& HTTP_UNSUPPORTED_MEDIA_TYPE (415)
\& HTTP_REQUEST_RANGE_NOT_SATISFIABLE (416)
\& HTTP_EXPECTATION_FAILED (417)
\& HTTP_MISDIRECTED REQUEST (421)
\& HTTP_UNPROCESSABLE_ENTITY (422)
\& HTTP_LOCKED (423)
\& HTTP_FAILED_DEPENDENCY (424)
\& HTTP_UPGRADE_REQUIRED (426)
\& HTTP_PRECONDITION_REQUIRED (428)
\& HTTP_TOO_MANY_REQUESTS (429)
\& HTTP_REQUEST_HEADER_FIELDS_TOO_LARGE (431)
\& HTTP_UNAVAILABLE_FOR_LEGAL_REASONS (451)
\&
\& HTTP_INTERNAL_SERVER_ERROR (500)
\& HTTP_NOT_IMPLEMENTED (501)
\& HTTP_BAD_GATEWAY (502)
\& HTTP_SERVICE_UNAVAILABLE (503)
\& HTTP_GATEWAY_TIMEOUT (504)
\& HTTP_HTTP_VERSION_NOT_SUPPORTED (505)
\& HTTP_VARIANT_ALSO_NEGOTIATES (506)
\& HTTP_INSUFFICIENT_STORAGE (507)
\& HTTP_LOOP_DETECTED (508)
\& HTTP_NOT_EXTENDED (510)
\& HTTP_NETWORK_AUTHENTICATION_REQUIRED (511)
.Ve
.SH "FUNCTIONS"
.IX Header "FUNCTIONS"
The following additional functions are provided. Most of them are
exported by default. The \f(CW\*(C`:is\*(C'\fR import tag can be used to import all
the classification functions.
.ie n .IP "status_message( $code )" 4
.el .IP "status_message( \f(CW$code\fR )" 4
.IX Item "status_message( $code )"
The \fIstatus_message()\fR function will translate status codes to human
readable strings. The string is the same as found in the constant
names above. If the \f(CW$code\fR is not registered in the list of \s-1IANA HTTP\s0 Status
Codes <https://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml>
then \f(CW\*(C`undef\*(C'\fR is returned.
.ie n .IP "is_info( $code )" 4
.el .IP "is_info( \f(CW$code\fR )" 4
.IX Item "is_info( $code )"
Return \s-1TRUE\s0 if \f(CW$code\fR is an \fIInformational\fR status code (1xx). This
class of status code indicates a provisional response which can't have
any content.
.ie n .IP "is_success( $code )" 4
.el .IP "is_success( \f(CW$code\fR )" 4
.IX Item "is_success( $code )"
Return \s-1TRUE\s0 if \f(CW$code\fR is a \fISuccessful\fR status code (2xx).
.ie n .IP "is_redirect( $code )" 4
.el .IP "is_redirect( \f(CW$code\fR )" 4
.IX Item "is_redirect( $code )"
Return \s-1TRUE\s0 if \f(CW$code\fR is a \fIRedirection\fR status code (3xx). This class of
status code indicates that further action needs to be taken by the
user agent in order to fulfill the request.
.ie n .IP "is_error( $code )" 4
.el .IP "is_error( \f(CW$code\fR )" 4
.IX Item "is_error( $code )"
Return \s-1TRUE\s0 if \f(CW$code\fR is an \fIError\fR status code (4xx or 5xx). The function
returns \s-1TRUE\s0 for both client and server error status codes.
.ie n .IP "is_client_error( $code )" 4
.el .IP "is_client_error( \f(CW$code\fR )" 4
.IX Item "is_client_error( $code )"
Return \s-1TRUE\s0 if \f(CW$code\fR is a \fIClient Error\fR status code (4xx). This class
of status code is intended for cases in which the client seems to have
erred.
.Sp
This function is \fBnot\fR exported by default.
.ie n .IP "is_server_error( $code )" 4
.el .IP "is_server_error( \f(CW$code\fR )" 4
.IX Item "is_server_error( $code )"
Return \s-1TRUE\s0 if \f(CW$code\fR is a \fIServer Error\fR status code (5xx). 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.
.Sp
This function is \fBnot\fR exported by default.
.ie n .IP "is_cacheable_by_default( $code )" 4
.el .IP "is_cacheable_by_default( \f(CW$code\fR )" 4
.IX Item "is_cacheable_by_default( $code )"
Return \s-1TRUE\s0 if \f(CW$code\fR indicates that a response is cacheable by default, and
it can be reused by a cache with heuristic expiration. All other status codes
are not cacheable by default. See \s-1RFC 7231 \- HTTP/1.1\s0 Semantics and Content,
Section 6.1. Overview of Status Codes <https://tools.ietf.org/html/rfc7231#section-6.1>.
.Sp
This function is \fBnot\fR exported by default.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\s-1IANA HTTP\s0 Status Codes <https://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml>
.SH "BUGS"
.IX Header "BUGS"
For legacy reasons all the \f(CW\*(C`HTTP_\*(C'\fR constants are exported by default
with the prefix \f(CW\*(C`RC_\*(C'\fR. It's recommended to use explicit imports and
the \f(CW\*(C`:constants\*(C'\fR tag instead of relying on this.
.SH "AUTHOR"
.IX Header "AUTHOR"
Gisle Aas <gisle@activestate.com>
.SH "COPYRIGHT AND LICENSE"
.IX Header "COPYRIGHT AND LICENSE"
This software is copyright (c) 1994\-2017 by Gisle Aas.
.PP
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.