HTTP স্ট্যাটাস কোড সমূহ

আমরা প্রায় সময় বিভিন্ন সাইটে 403, 404, 500 Error দেখি। দেখতে দেখতে অনেকেই এইগুলোর দুই একটার মানে জানি। যেমনঃ ৪০৪ দেখালে বুঝায় যে পেজটি খুজে পাওয়া যায় নি, ৫০০ দেখালে বুঝি যে ইন্টারনাল সার্ভার সমস্যা ইত্যাদি। কিন্তু এমন স্ট্যাটাস কোড আরও অনেক রয়েছে যা আমরা অনেকেই জানি না। এগুলোকে মূলত বলে HTTP স্ট্যাটাস কোড। এগুলো ওয়েব ডেভলপারদের জেনে রাখা খুবই জরুরি এতে তাদের অনেক কাজে সুবিধা হয়। তো আসুন জেনে নেই সকল HTTP স্ট্যাটাস কোড সমূহ।

1XX:Information

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

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 Content

The server is delivering only part of the resource due to a range header sent by the client

3XX:Redirection

300 Multiple Choices
A link list. The user can select a link and go to that location. Maximum five addresses
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 the requested page has not been modified since last requested

306 Switch Proxy

No longer used

307 Temporary Redirect

The requested page has moved temporarily to a new URL

308 Resume Incomplete

Used in the resumable requests proposal to resume aborted PUT or POST requests

4XX:Client Error

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 requested page could not be found but may be available again in the future
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

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

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