Reprinted https://blog.csdn.net/qq_42651904/article/details/89641340
---- --- Type Status Code Reason
1xx Informational (informational status codes) the received request is being processed
2xx Success (success status code) requests normally processed
3xx Redirection (redirect status) additional operations required to complete the request
4xx client error (client error status code) server can not handle the request
5xx server error (server error status code) server processing the request error
status code status -------- ------------ -------- corresponding meaning
200 successful server has successfully processed the request. Typically, this means that the server provided the requested page.
201 has been created request was successful and the server created a new resource
202 has accepted the request was successful and the server created a new resource
203 unauthorized information server successfully processed the request, but is returning information that may be from another source
204 No Content The server successfully processed request, but not returning any content
205 reset content server successfully processed the request, but not returning any content
206 portion of the content server successfully processed a partial GET request
300 kinds of selection for a request, the server may perform various operations. The server may select an operation requestor (user agent), or to provide for the requester to select the action list
page 301 Moved Permanently request has been permanently moved to a new location. When the server returns this response (response to a GET or HEAD request), it is automatically transferred to the new location requestor
302 in response to the current temporary mobile server request from a web of a different location, but the requestor should continue to use the original location for subsequent request
See other location requestor 303 should separate GET request to retrieve the response to different locations, the server returns this code
304 not modified since the last request, the requested page has not been modified. When the server returns this response, it does not return the page content
305 using proxy that the requestor can only access the requested page using a proxy. If the server returns this response, the requester should use the agency also said that
307 temporary redirect server is currently responding to the request page from a different location, but the requestor should continue to use the original location for future requests
syntax 400 Bad Request The server does not understand the request
401 unauthorized request requires authentication. For pages that require login, the server might return this response
403 Forbidden server rejects the request
404 web server can not find the requested was not found
405 methods specified in the request to disable
406 does not accept the use of the requested page can not respond to the request content characteristics of
407 required this proxy authorization status code 401 (not authorized), but specifies that the requestor should be authorized to use the proxy
408 request timeout server request timeout occurs while waiting for
the conflict conflict server 409 occurs upon completion of the request. The server must contain the conflict in the response information
410 has been removed if the requested resource has been permanently removed, the server returns this response
411 requests the server does not accept the required effective length without a valid Content-Length header field
412 does not satisfy prerequisites server requester does not satisfy the request provided wherein a prerequisite
413 request entity too large server can not handle the request because it is too large beyond the processing capacity of the server
URI 414 requests seeking the long URI (typically a URL) is too long The server can not handle
415 media format does not support the requested type of request is not supported page
416 Requested range not meet the requirements of the scope of the request if the page is not available, the server returns this status code
417 Expectation failed server does not meet the "expectations" request-header field requirements
internal 500 server error the server encountered an error and could not complete your request
501 has not been implemented server does not have to complete the request. For example, this code may be returned when the server can not recognize the request method
502 error gateway server acting as a gateway or proxy, received an invalid response from the upstream server
503 service unavailable application server is currently unavailable (because it is overloaded or down for maintenance). Typically, this is a temporary state
504 Gateway Timeout server as a gateway or a proxy, but did not receive a request from the upstream server
505 HTTP Version not supported The server does not support the HTTP protocol version used in the request
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