HTTP Status Code

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What is HTTP Status Code?

Whenever a browser sends a request to a webserver to get a webpage, image, video or any file. The web server will send a status code to a web browser though the requested file may or may not be available.

The following tables will give you the complete status code send by the webserver.

1xx: Informational Response

Status CodeMessageExplanation
100 Continue The server has received the requested header and ask the client (browser) to continue to send the request body.
101 Switching Protocols The client (browser) has asked the server to switch protocols and the server has agreed to do so.
102 Processing When the client (browser) sends a resquest body which includes too many sub request, then a server will return 102 status code to indicate that your request has received and is processing the request. But no response is available at the moment. This prevent the client (browser) in assuming the request was lost or from timing out.
103 Checkpoint Used to return some response headers before file HTTP message.

2xx: Successful

Status CodeMessageExplanation
200 OK The request sent successfully and the server received the response.
201 Created The request has been fulfilled, and a new resource is created.
202 Accepted The request has been accepted for processing, but the processing has not been completed.
203 Non-Authoritative Information The request sent successfully and the server is a transforming proxy, thus the response may be from another resource.
204 No Content The server successfully processed the request and is not returning any content.
205 Reset Content The server successfully processed the request, but is not returning any content. Unlike a 204 response, this response requires that the client (browser) 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 Status code occurs during downloading and live streaming.

3xx: Redirection

Status CodeMessageExplanation
300 Multiple Choices Here user is provided with multiple choice to choose from. For example, in youtube user is provided with video resolution to choose from and the corresponding redirection takes place.
301 Moved Permanently The requested page has moved to a new URL.
302 Found The requested page has moved temporarily to a new URL.
303 See Other The requested page can be found under a different URL.
304 Not Modified Indicates that the resource has not been modified since the version specified.
306 Use Proxy The requested resource is available only through a proxy.
307 Temporary Redirect The requested page has moved temporarily to a new URL.
308 Permanent Redirect The requested page has moved permanently to a new URL.

4xx: Client Error

Status CodeMessageExplanation
400 Bad Request The server cannot process the request due to an apparent client error like size too large, Invalid request message framing and syntax error.
401 Unauthorized The request was a legal request, but the server is refusing to respond to it.
402 Payment Required Reserved for future use.
403 Forbidden The request was valid, but the server is refusing action as the user might not have the necessary permission. For example, Some American payment sites will send 403 status code, when requested from different location other than America.
404 Not Found The requested resource could not be found but may be available in the future.
405 Method Not Allowed A request method is not supported for the requested resource.
406 Not Acceptable The server can only generate a response that is not accepted by the client.
407 Proxy Authentication Required The client must first authenticate itself with the proxy.
408 Request Timeout The server timed out waiting for the request.
409 Conflict The request could not be processed because of conflict in the request.
410 Gone The requested page is no longer available
411 Length Required The "Content-Length" is not defined. The server will not accept the request without specifing content length.
412 Precondition Failed The server does not meet one of the preconditions that the client (browser) put on the request.
413 Request Entity/Payload 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 server will not accept the request, because the media type is not supported .
416 Requested Range Not Satisfiable The client has asked for a portion of the file, but the server cannot supply that portion.
417 Expectation Failed The server cannot meet the requirements of the Expect request-header field.

5xx: Server Error

Status CodeMessageExplanation
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 upstream server.
503 Service Unavailable The server is currently unavailable (Server turned off or down-time due to more request). Generally, this is a temporary state.
504 Gateway Timeout The server was acting as a gateway or proxy and did not receive a timely response from the upstream server.
505 HTTP Version Not Supported The server does not support the HTTP protocol version used in the request.
507 Insufficient Storage The server is unable to store the representation needed to complete the request.
511 Network Authentication Required The client needs to authenticate to gain network access.

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