![]() ![]() For example, as a download mirror site, the client requests to download the file, and in Site A can not find the return 404, using sub-requests to request Site B. However, due to there being at least 40 different server status codes, it might be difficult to remember which code signals what type of problem.For example, as a CDN service, site A returns 302, accesses site B with url of location extracted by sub-request, and returns the result to the client.Client - > nginx proxy Site A (return 404, 302) 404 Not Found 405 Method Not Allowed 406 Not Acceptable 407 Proxy Authentication Required 408 Request Timeout 409 Conflict 410 Gone 411 Length Required 412 Precondition Failed 413 Payload Too Large 414 URI Too Long 415 Unsupported Media Type 416 Range Not Satisfiable 417 Expectation Failed 418 Im a teapot 422 Unprocessable.
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