Reprint HTTP common Status Code Analysis 200 301 302 404 500

Reprint Original Address: http://www.cnblogs.com/starof/p/5035119.html

HTTP State code (HTTP status codes)

Some of the common status codes are:

First, 1 start
A 1xx (temporary response) represents a temporary response and requires a status code for the requester to continue the operation. Code description

100 (continued) The requesting person shall continue to make the request. The server returns this code to indicate that the first part of the request was received and is waiting for the remainder.

101 (switching protocol) The requestor has asked the server to switch protocols, and the server has confirmed and is ready to switch.
Two, 2 start
2XX (Success) indicates the status code of the request was successfully processed. Code description

200 (success) The server has successfully processed the request. Typically, this indicates that the server provided the requested Web page.

201 (created) The request was successful and the server created a new resource.

202 (accepted) the server has accepted the request but has not yet processed it.

203 (non-authoritative information) the server has successfully processed the request, but the information returned may be from another source.

204 (no content) the server successfully processed the request, but did not return any content.

205 (reset content) the server successfully processed the request, but did not return any content.

206 (partial) The server successfully processed a partial GET request.
Three, 3 start
3xx (redirect) indicates that further action is required to complete the request. Typically, these status codes are used for redirection. Code description

300 (multiple options) for requests, the server can perform a variety of operations. The server can select an action based on the requestor (user agent) or provide a list of actions for the requestor to select.

301 (permanently moved) The requested page has been permanently moved to a new location. When the server returns this response (a response to a GET or HEAD request), the requestor is automatically forwarded to the new location.

302 (Temporary move) The server is currently responding to requests from a Web page in a different location, but the requestor should continue to use the original location for future requests.

303 (View other locations) The server returns this code when the requestor should use a separate GET request for the different locations to retrieve the response.

304 (not modified) The requested webpage has not been modified since the last request. When the server returns this response, the Web page content is not returned.

305 (using a proxy) the requestor can only use the proxy to access the requested Web page. If the server returns this response, it also indicates that the requestor should use the proxy.

307 (Temporary redirect) The server is currently responding to requests from a Web page in a different location, but the requestor should continue to use the original location for future requests.
Four, 4 opening
4xx (Request error) These status codes indicate a possible error in the request and hinder the processing of the server. Code description

400 (Error request) The server does not understand the syntax of the request.

401 (unauthorized) request authentication is required. The server may return this response for pages that need to log on.

403 (Forbidden) The server rejects the request.

404 (not found) The requested Web page was not found by the server.

405 (method Disabled) Disables the method specified in the request.

406 (not accepted) cannot use the requested content attribute to respond to the requested Web page.

407 (requires proxy authorization) This status code is similar to 401 (unauthorized), but specifies that the requestor should authorize the use of the proxy.

408 (Request timed out) A timeout occurred while the server was waiting for a request.

409 (conflict) The server has a conflict when it finishes the request. The server must include information about the conflict in the response.

410 (Deleted) If the requested resource has been permanently deleted, the server returns this response.

411 (requires valid length) The server does not accept requests that do not contain a valid Content-Length header field.

412 (precondition not met) the server does not meet one of the prerequisites set by the requestor in the request.

413 (Request entity too Large) The server cannot process the request because the request entity is too large to exceed the processing power of the server.

414 (The requested URI is too long) The requested URI (usually the URL) is too long for the server to process.

415 (Unsupported media type) The requested format is not supported by the requested page.

416 (The request scope does not meet the requirements) if the page cannot provide the requested scope, the server returns this status code.

417 (unmet expectations) the server does not meet the requirements for the expected Request header field.
Five, 5 start
5XX (server error) These status codes indicate that the server has an internal error while trying to process the request. These errors may be the error of the server itself, not the request. Code description

500 (server internal error) the server encountered an error and could not complete the request.

501 (not yet implemented) the server does not have the capability to complete the request. For example, this code may be returned when the server does not recognize the request method.

502 (Error Gateway) The server receives an invalid response from the upstream server as a gateway or proxy.

503 (Service Unavailable) the server is not currently available (due to overloading or downtime maintenance). Typically, this is only a temporary state.

504 (Gateway Timeout) The server acts as a gateway or proxy, but does not receive requests from the upstream server in a timely manner.

505 (HTTP version not supported) the HTTP protocol version used in the request is not supported by the server.

Reprint HTTP common Status Code Analysis 200 301 302 404 500