Introduction
When a Client requests to a web server, Web Server Response to that request
IT can be an Internal Error , Client Error and ….. we Call it Response Code or HTTP Status Message .
It is common to name these errors HTML error messages.
But these messages are something called HTTP status messages. In fact, the server always returns a message for every request. The most common message is 200 OK.
Below is a list of HTTP status messages that might be returned:
1XX Information
Response Code |
Reason |
|---|---|
|
100 (Continue)
|
The server has received the request headers, and the client should proceed to send the request body
|
|
101 (Switching Protocols )
|
The requester has asked the server to switch protocols
|
|
103 (Checkpoint)
|
Used in the resumable requests proposal to resume aborted PUT or POST requests
|
2XX Successful
Response Code |
Reason |
|---|---|
|
200 (OK)
|
The request is OK (this is the standard response for successful HTTP requests)
|
|
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 has been successfully processed, but is returning information that may be from another source
|
|
204 (No Content)
|
The request has been successfully processed, but is not returning any content
|
|
205 ( Reset Content)
|
The request has been successfully processed, but is not returning any content, and requires that the requester reset the document view
|
|
206 (Partial Contentt)
|
The server is delivering only part of the resource due to a range header sent by the client
|
3XX Redirection
Response Code |
Reason |
|---|---|
|
300 ( Multiple Choices)
|
The request is OK (this is the standard response for successful HTTP requests)
|
|
301 ( Moved Permanently)
|
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
|
|
302 (Found)
|
The request has been successfully processed, but is returning information that may be from another source
|
|
303 (See Other)
|
The request has been successfully processed, but is not returning any content
|
|
304 (Not Modified)
|
The request has been successfully processed, but is not returning any content, and requires that the requester reset the document view
|
|
306 (Switch Proxy)
|
The server is delivering only part of the resource due to a range header sent by the client
|
|
307 (Temporary Redirect)
|
The server is delivering only part of the resource due to a range header sent by the client
|
|
308 (Resume Incomplete)
|
The server is delivering only part of the resource due to a range header sent by the client
|
4XX Client Error
Response Code |
Reason |
|---|---|
|
400 (Bad Request)
|
The request cannot be fulfilled due to bad syntax
|
|
401 (Unauthorized)
|
The request was a legal request, but the server is refusing to respond to it. For use when authentication is possible but has failed or not yet been provided
|
|
402 (Payment Required)
|
Reserved for future use
|
|
403 (Forbidden)
|
The request was a legal request, but the server is refusing to respond to it
|
|
404 (Not Found)
|
The request has been successfully processed, but is not returning any content
|
|
405 (Method Not Allowed)
|
A request was made of a page using a request method not supported by that page
|
|
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 completed because of a 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 it
|
|
412 (Precondition Failed)
|
The precondition given in the request evaluated to false by the server
|
|
413 (Request Entity Too Large)
|
The server will not accept the request, because the request entity is too large
|
|
414 (Request-URI Too Long)
|
The server will not accept the request, because the URL is too long. Occurs when you convert a POST request to a GET request with a long query information
|
|
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
Response Code |
Reason |
|---|---|
|
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 fulfill 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 (overloaded or down)
|
|
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
|
|
511 (Network Authentication Required)
|
The client needs to authenticate to gain network access
|
Perfect as always
When will “What is Prometheus” will be completed?