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:mod:`http` --- HTTP modules

.. module:: http
   :synopsis: HTTP status codes and messages

Source code: :source:`Lib/http/__init__.py`

.. index::
   pair: HTTP; protocol
   single: HTTP; http (standard module)

:mod:`http` is a package that collects several modules for working with the HyperText Transfer Protocol:

:mod:`http` is also a module that defines a number of HTTP status codes and associated messages through the :class:`http.HTTPStatus` enum:

.. versionadded:: 3.5

A subclass of :class:`enum.IntEnum` that defines a set of HTTP status codes, reason phrases and long descriptions written in English.

Usage:

>>> from http import HTTPStatus
>>> HTTPStatus.OK
<HTTPStatus.OK: 200>
>>> HTTPStatus.OK == 200
True
>>> http.HTTPStatus.OK.value
200
>>> HTTPStatus.OK.phrase
'OK'
>>> HTTPStatus.OK.description
'Request fulfilled, document follows'
>>> list(HTTPStatus)
[<HTTPStatus.CONTINUE: 100>, <HTTPStatus.SWITCHING_PROTOCOLS: 101>, ...]

HTTP status codes

Supported, IANA-registered status codes available in :class:`http.HTTPStatus` are:

Code Enum Name Details
100 CONTINUE HTTP/1.1 RFC 7231, Section 6.2.1
101 SWITCHING_PROTOCOLS HTTP/1.1 RFC 7231, Section 6.2.2
102 PROCESSING WebDAV RFC 2518, Section 10.1
200 OK HTTP/1.1 RFC 7231, Section 6.3.1
201 CREATED HTTP/1.1 RFC 7231, Section 6.3.2
202 ACCEPTED HTTP/1.1 RFC 7231, Section 6.3.3
203 NON_AUTHORITATIVE_INFORMATION HTTP/1.1 RFC 7231, Section 6.3.4
204 NO_CONTENT HTTP/1.1 RFC 7231, Section 6.3.5
205 RESET_CONTENT HTTP/1.1 RFC 7231, Section 6.3.6
206 PARTIAL_CONTENT HTTP/1.1 RFC 7233, Section 4.1
207 MULTI_STATUS WebDAV RFC 4918, Section 11.1
208 ALREADY_REPORTED WebDAV Binding Extensions RFC 5842, Section 7.1 (Experimental)
226 IM_USED Delta Encoding in HTTP RFC 3229, Section 10.4.1
300 MULTIPLE_CHOICES HTTP/1.1 RFC 7231, Section 6.4.1
301 MOVED_PERMANENTLY HTTP/1.1 RFC 7231, Section 6.4.2
302 FOUND HTTP/1.1 RFC 7231, Section 6.4.3
303 SEE_OTHER HTTP/1.1 RFC 7231, Section 6.4.4
304 NOT_MODIFIED HTTP/1.1 RFC 7232, Section 4.1
305 USE_PROXY HTTP/1.1 RFC 7231, Section 6.4.5
307 TEMPORARY_REDIRECT HTTP/1.1 RFC 7231, Section 6.4.7
308 PERMANENT_REDIRECT Permanent Redirect RFC 7238, Section 3 (Experimental)
400 BAD_REQUEST HTTP/1.1 RFC 7231, Section 6.5.1
401 UNAUTHORIZED HTTP/1.1 Authentication RFC 7235, Section 3.1
402 PAYMENT_REQUIRED HTTP/1.1 RFC 7231, Section 6.5.2
403 FORBIDDEN HTTP/1.1 RFC 7231, Section 6.5.3
404 NOT_FOUND HTTP/1.1 RFC 7231, Section 6.5.4
405 METHOD_NOT_ALLOWED HTTP/1.1 RFC 7231, Section 6.5.5
406 NOT_ACCEPTABLE HTTP/1.1 RFC 7231, Section 6.5.6
407 PROXY_AUTHENTICATION_REQUIRED HTTP/1.1 Authentication RFC 7235, Section 3.2
408 REQUEST_TIMEOUT HTTP/1.1 RFC 7231, Section 6.5.7
409 CONFLICT HTTP/1.1 RFC 7231, Section 6.5.8
410 GONE HTTP/1.1 RFC 7231, Section 6.5.9
411 LENGTH_REQUIRED HTTP/1.1 RFC 7231, Section 6.5.10
412 PRECONDITION_FAILED HTTP/1.1 RFC 7232, Section 4.2
413 REQUEST_ENTITY_TOO_LARGE HTTP/1.1 RFC 7231, Section 6.5.11
414 REQUEST_URI_TOO_LONG HTTP/1.1 RFC 7231, Section 6.5.12
415 UNSUPPORTED_MEDIA_TYPE HTTP/1.1 RFC 7231, Section 6.5.13
416 REQUEST_RANGE_NOT_SATISFIABLE HTTP/1.1 Range Requests RFC 7233, Section 4.4
417 EXPECTATION_FAILED HTTP/1.1 RFC 7231, Section 6.5.14
422 UNPROCESSABLE_ENTITY WebDAV RFC 4918, Section 11.2
423 LOCKED WebDAV RFC 4918, Section 11.3
424 FAILED_DEPENDENCY WebDAV RFC 4918, Section 11.4
426 UPGRADE_REQUIRED HTTP/1.1 RFC 7231, Section 6.5.15
428 PRECONDITION_REQUIRED Additional HTTP Status Codes RFC 6585
429 TOO_MANY_REQUESTS Additional HTTP Status Codes RFC 6585
431 REQUEST_HEADER_FIELDS_TOO_LARGE Additional HTTP Status Codes RFC 6585
500 INTERNAL_SERVER_ERROR HTTP/1.1 RFC 7231, Section 6.6.1
501 NOT_IMPLEMENTED HTTP/1.1 RFC 7231, Section 6.6.2
502 BAD_GATEWAY HTTP/1.1 RFC 7231, Section 6.6.3
503 SERVICE_UNAVAILABLE HTTP/1.1 RFC 7231, Section 6.6.4
504 GATEWAY_TIMEOUT HTTP/1.1 RFC 7231, Section 6.6.5
505 HTTP_VERSION_NOT_SUPPORTED HTTP/1.1 RFC 7231, Section 6.6.6
506 VARIANT_ALSO_NEGOTIATES Transparent Content Negotiation in HTTP RFC 2295, Section 8.1 (Experimental)
507 INSUFFICIENT_STORAGE WebDAV RFC 4918, Section 11.5
508 LOOP_DETECTED WebDAV Binding Extensions RFC 5842, Section 7.2 (Experimental)
510 NOT_EXTENDED An HTTP Extension Framework RFC 2774, Section 7 (Experimental)
511 NETWORK_AUTHENTICATION_REQUIRED Additional HTTP Status Codes RFC 6585, Section 6

In order to preserve backwards compatibility, enum values are also present in the :mod:`http.client` module in the form of constants. The enum name is equal to the constant name (i.e. http.HTTPStatus.OK is also available as http.client.OK).