- 100 Continue
- The requestor should continue with the request. The server returns this
code to indicate that it has received the first part of a request and is waiting
for the rest.
- 101 Switching Protocols
- This means the requester has asked the server to switch protocols and the
server is acknowledging that it will do so
- 102 Processing
- As a WebDAV request may contain many sub-requests involving file operations,
it may take a long time to complete the request. This code indicates that the
server has received and is processing the request, but no response is available
yet. This prevents the client from timing out and assuming the request was lost.
- 200 OK
- Standard response for successful HTTP requests. The actual response will
depend on the request method used. In a GET request, the response will contain
an entity corresponding to the requested resource. In a POST request the response
will contain an entity describing or containing the result of the action.
- 201 Created
- The request has been fulfilled and resulted in a new resource being created.
- 202 Accepted
- The request has been accepted for processing, but the processing has not
been completed. The request might or might not eventually be acted upon, as
it might be disallowed when processing actually takes place.
- 203 Non-Authoritative Information (since HTTP/1.1)
- The server successfully processed the request, but is returning information
that may be from another source.
- 204 No Content
- The server successfully processed the request, but is not returning any
- 205 Reset Content
- The server successfully processed the request, but is not returning any
content. Unlike a 204 response, this response requires that the requester reset
the document view.
- 206 Partial Content
- The server is delivering only part of the resource due to a range header
sent by the client. This is used by tools like wget to enable resuming of interrupted
downloads, or split a download into multiple simultaneous streams.
- 207 Multi-Status (WebDAV) (RFC 2518 )
- The message body that follows is an XML message and can contain a number
of separate response codes, depending on how many sub-requests were made.
- 300 Multiple Choices
- Indicates multiple options for the resource that the client may follow.
It, for instance, could be used to present different format options for video,
list files with different extensions, or word sense disambiguation.
- 301 Moved Permanently
- This and all future requests should be directed to the given URI.
- 302 Found
- This is the most popular redirect code, but also an example of industrial
practice contradicting the standard. HTTP/1.0 specification (RFC 1945 ) required
the client to perform a temporary redirect (the original describing phrase was
"Moved Temporarily"), but popular browsers implemented it as a 303 See Other.
Therefore, HTTP/1.1 added status codes 303 and 307 to distinguish between the
two behaviors. However, the majority of Web applications and frameworks still
use the 302 status code as if it were the 303.
- 303 See Other (since HTTP/1.1)
- The response to the request can be found under another URI using a GET method.
When received in response to a PUT, it should be assumed that the server has
received the data and the redirect should be issued with a separate GET message.
- 304 Not Modified
- Indicates the resource has not been modified since last requested. Typically,
the HTTP client provides a header like the If-Modified
- Since header to provide a time against which to compare. Utilizing this
saves bandwidth and reprocessing on both the server and client, as only the
header data must be sent and received in comparison to the entirety of the page
being re-processed by the server, then resent using more bandwidth of the server
- 305 Use Proxy
- The requestor can only access the requested page using a proxy. When the
server returns this response, it also indicates the proxy that the requestor
- 306 Switch Proxy
- No longer used.
- 307 Temporary Redirect (since HTTP/1.1)
- In this occasion, the request should be repeated with another URI, but future
requests can still use the original URI. In contrast to 303, the request method
should not be changed when reissuing the original request. For instance, a POST
request must be repeated using another POST request.
- 400 Bad Request
- The request contains bad syntax or cannot be fulfilled. The server didn't
understand the syntax of the request.
- 401 Unauthorized
- Similar to 403 Forbidden, but specifically for use when authentication
is possible but has failed or not yet been provided. The response must include
a WWW-Authenticate header field containing a challenge applicable to the requested
resource. The request requires authentication. The server might return this
response for a page behind a login.
- 402 Payment Required
- The original intention was that this code might be used as part of some
form of digital cash or micropayment scheme, but that has not happened, and
this code has never been used.
- 403 Forbidden
- The request was a legal request, but the server is refusing to respond to
it. Unlike a 401 Unauthorized response, authenticating will make no difference.
- 404 Not Found
- The server can't find the requested page. For instance, the server often
returns this code if the request is for a page that doesn't exist on the server.
The requested resource could not be found but may be available again in the
future. Subsequent requests by the client are permissible. No indication is
given of whether the condition is temporary or permanent.
- 405 Method Not Allowed
- A request was made of a resource using a request method not supported by
that resource; for example, using GET on a form which requires data to be presented
via POST, or using PUT on a read-only resource.
- 406 Not Acceptable
- The requested resource is only capable of generating content not acceptable
according to the Accept headers sent in the request.
- 407 Proxy Authentication Required
- This code is similar to 401 (Unauthorized), but indicates that the client
must first authenticate itself with the proxy. The proxy MUST return a Proxy-Authenticate
header field containing a challenge applicable to the proxy
for the requested resource.
- 408 Request Timeout
- The server timed out waiting for the request.
- 409 Conflict
- Indicates that the request could not be processed because of conflict in
the request, such as an edit conflict.
- 410 Gone
- Indicates that the resource requested is no longer available and will not
be available again. This should be used when a resource has been intentionally
removed; however, it is not necessary to return this code and a 404 Not Found
can be issued instead. Upon receiving a 410 status code, the client should not
request the resource again in the future. Clients such as search engines should
remove the resource from their indexes.
- 411 Length Required
- The request did not specify the length of its content, which is required
by the requested resource.
- 412 Precondition Failed
- The server does not meet one of the preconditions that the requester put
on the request.
- 413 Request Entity Too Large
- The request is larger than the server is willing or able to process.
- 414 Request URI Too Long
- The URI provided was too long for the server to process.
- 415 Unsupported Media Type
- The request did not specify any media types that the server or resource
supports. For example the client specified that an image resource should be
served as image/svg+xml, but the server cannot find a matching version of the
- 416 Requested Range Not Satisfiable
- The client has asked for a portion of the file, but the server cannot supply
that portion (for example, if the client asked for a part of the file that lies
beyond the end of the file).
- 417 Expectation Failed
- The server cannot meet the requirements of the Expect request-header field.
- 418 I'm a teapot
- The HTCPCP server is a teapot. The responding entity MAY be short and stout.
This code was defined as one of the traditional IETF April Fools' jokes, in
RFC 2324, Hyper Text Coffee Pot Control Protocol, and is not expected
to be implemented by actual HTTP servers.
- 422 Unprocessable Entity (WebDAV) (RFC 4918 )
- The request was well-formed but was unable to be followed due to semantic
- 423 Locked (WebDAV) (RFC 4918 )
- The resource that is being accessed is locked
- 424 Failed Dependency (WebDAV) (RFC 4918 )
- The request failed due to failure of a previous request (e.g. a PROPPATCH).
- 425 Unordered Collection (RFC 3648 )
- Defined in drafts of WebDav Advanced Collections, but not present in "Web
Distributed Authoring and Versioning (WebDAV) Ordered Collections Protocol".
- 426 Upgrade Required (RFC 2817 )
- The client should switch to TLS/1.0.
- 449 Retry With
- A 微软 extension. The request should be retried after doing the appropriate
- 450 Blocked by Windows Parental Controls
- A 微软 extension. This error is given when Windows Parental Controls
are turned on and are blocking access to the given webpage.
- 500 Internal Server Error
- A generic error message, given when no more specific message is suitable.
- 501 Not Implemented
- The server either does not recognize the request method, or it lacks the
ability to fulfil the request.
- 502 Bad Gateway
- The server was acting as a gateway or proxy and received an invalid response
from the downstream server.
- 503 Service Unavailable
- The server is currently unavailable (because it is overloaded or down for
maintenance). Generally, this is a temporary state.
- 504 Gateway Timeout
- The server was acting as a gateway or proxy and did not receive a timely
request from the downstream server.
- 505 HTTP Version Not Supported
- The server does not support the HTTP protocol version used in the request.
- 506 Variant Also Negotiates (RFC 2295 )
- Transparent content negotiation for the request, results in a circular reference.
- 507 Insufficient Storage (WebDAV) (RFC 4918 )
- 509 Bandwidth Limit Exceeded (Apache bw/limited extension)
- This status code, while used by many servers, is not specified in any RFCs.
- 510 Not Extended (RFC 2774 )
- Further extensions to the request are required for the server to fulfill