HTTP State code (HTTP status codes)

HTTP State code (HTTP status codes)

Some of the common status codes are: 200-Server successfully returned page 403-(Forbidden) server denied request 404-requested page does not exist 503-Service UnavailableAll State explanations:

1Xx(Temporary response)
A status code that represents a temporary response and requires the requestor to continue the operation.

Code Description
 -(continued) The requestor 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.

2Xx(Success)
represents the status code that successfully processed the request.
Code Description
 $(successful) The request was successfully processed by the server. Typically, this indicates that the server provided the requested Web page.
201(created) the request succeeded and the server created a new resource.
202the server has accepted the request, but it has not yet been processed.
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(part of the content) the server successfully processed someGETrequest.

3Xx(redirect)
indicates that further action is required to complete the request. Typically, these status codes are used for redirection.

Code description
 -(multiple choices) the server can perform a variety of operations on the request. The server can be based on the requestor(User agent)Select an action, 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. The server returns this response (forGETorHEADthe requested response), the requestor is automatically forwarded to the new location.
302(temporary move) The server is currently responding to a request from a Web page in a different location, but the requestor should continue to use the original location for future requests.
303(see other locations) The requester should use a separateGETRequest to retrieve the response, the server returns this code.
304(unmodified) The requested webpage has not been modified since the last request. When the server returns this response, the Web page content is not returned.
305the requestor (using a proxy) 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 redirection) 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.

4Xx(Request error)
These status codes indicate a possible error in the request and hinder the processing of the server.

Code description
 -(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 associated with the401(not authorized), but specifies that the requestor should authorize the use of the proxy.
408A timeout occurred while the server was waiting for a request (Request timed out).
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(Prerequisites not met) the server did not meet one of the prerequisites set by the requestor in the request.
413(Request entity is 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 requestedRr.too long) of the requestedRr.(usually the URL) is too long and the server cannot process it.
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) server not satisfied"expected"Request header field requirements.

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
 -(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(HTTPUnsupported version) the server does not support requests.HTTPThe protocol version. 

Reference Document: Http://blog.sina.com.cn/s/blog_af6bb6bc0102vhs9.html

403 (Forbidden) The server rejects the request.

HTTP status Code (HTTP position Code)