HTTP return value

Some common HTTP status return codes are:

200-Server successfully returned to Web page
404-The requested page does not exist
503-Service Not available

HTTP status Return code 1xx (ad hoc response)
A status code that represents a temporary response and requires the requestor to continue the operation.

HTTP status return codes
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.

HTTP status return code 2xx (Success)
Represents the status code that successfully processed the request.

HTTP status return codes
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.

HTTP status return code 3xx (redirected)
Indicates that further action is required to complete the request. Typically, these status codes are used for redirection.

HTTP status return codes
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.

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

HTTP status return code
  code     Description
   (Error request)   The server does not understand the syntax of the request.
401    (unauthorized)   Request authentication required. The server may return this response for pages that need to log on.
403    (Forbidden)   Server denied request.
404    (not found)   The server cannot find the requested webpage.
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)   timeout occurs when the server waits for a request.
409    (conflict)   The server has a conflict when it finishes the request. The   server must contain information about the conflict in the response.
410    (Deleted)   The server returns this response if the requested resource has been permanently deleted.
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 does 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 requested URI is too long)   The requested URI (usually the URL) is too long for the server to process. The format of the
415    (Unsupported media type) request is not supported by the requested page.
416    (Request scope does not meet 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 of the expected Request header field.

HTTP status return code 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.

HTTP status return codes
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.

HTTP return value