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In computing, POST is a request method supported by HTTP used by the World Wide Web. By design, the POST request method requests that a web server accepts the data enclosed in the body of the request message, most likely for storing it. [1] It is often used when uploading a file or when submitting a completed web form.
To avoid this problem, many web developers use the PRG pattern [2] —instead of responding with content, the server responds to a POST request by redirecting the client to another location. The HTTP 1.1 specification introduced the HTTP 303 ("See other") response code to ensure that in this situation, browsers can safely refresh the server ...
Similarly, a request to DELETE a certain user will have no effect if that user has already been deleted. In contrast, the methods POST, CONNECT, and PATCH are not necessarily idempotent, and therefore sending an identical POST request multiple times may further modify the state of the server or have further effects, such as sending multiple ...
If a client encounters a redirect, it needs to make a number of decisions how to handle the redirect. Different status codes are used by clients to understand the purpose of the redirect, how to handle caching and which request method to use for the subsequent request. HTTP/1.1 defines several status codes for redirection :
It is RECOMMENDED that all HTTP senders and recipients support, at a minimum, request-line lengths of 8000 octets. [13] If the URL is too long, the web server fails with the 414 Request-URI Too Long HTTP status code. The common workaround for these problems is to use POST instead of GET and store the parameters in the request body. The length ...
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In this case, the request should be repeated with another URI; however, future requests should still use the original URI. In contrast to how 302 was historically implemented, the request method is not allowed to be changed when reissuing the original request. For example, a POST request should be repeated using another POST request.
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