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.\" ========================================================================
.\"
.IX Title "HTTP::Status 3"
.TH HTTP::Status 3 "2012-02-16" "perl v5.10.1" "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 "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\s0 2616 and \s-1RFC\s0 2518.
.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 3
\& HTTP_CONTINUE (100)
\& HTTP_SWITCHING_PROTOCOLS (101)
\& HTTP_PROCESSING (102)
\&
\& 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_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_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_I_AM_A_TEAPOT (418)
\& HTTP_UNPROCESSABLE_ENTITY (422)
\& HTTP_LOCKED (423)
\& HTTP_FAILED_DEPENDENCY (424)
\& HTTP_NO_CODE (425)
\& HTTP_UPGRADE_REQUIRED (426)
\& HTTP_PRECONDITION_REQUIRED (428)
\& HTTP_TOO_MANY_REQUESTS (429)
\& HTTP_REQUEST_HEADER_FIELDS_TOO_LARGE (431)
\& HTTP_RETRY_WITH (449)
\&
\& 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_BANDWIDTH_LIMIT_EXCEEDED (509)
\& 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 unknown, 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.
.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.