HTTP-communicates over TCP/IP. An HTTP client connects to an HTTP server using TCP. After establishing a connection, the client can send an HTTP request message to the server:
POST /item HTTP/1.1
Host: 189.123.345.239
Content-Type: text/plain
Content-Length: 200
The server then processes the request and sends an HTTP response back to the client. The response contains a statuscode that indicates the status of the request:
200 OK
Content-Type: text/plain
Content-Length: 200
In the example above, the server returned a statuscode of 200. This is the standard success code for HTTP. If the server could not decode the request, it could have returned something like this:
400 Bad Request
Content-Length: 0
Status-Code | |
---|---|
100 | Continue |
101 | Switching Protocols |
200 | OK |
201 | Created |
202 | Accepted |
203 | Non-Authoritative Information |
204 | No Content |
205 | Reset Content |
206 | Partial Content |
300 | Multiple Choices |
301 | Moved Permanently |
302 | Moved Temporarily |
303 | See Other |
304 | Not Modified |
305 | Use Proxy |
400 | Bad Request |
401 | Unauthorized |
402 | Payment Required |
403 | Forbidden |
404 | Not Found |
405 | Method Not Allowed |
406 | Not Acceptable |
407 | Proxy Authentication Required |
408 | Request Time-out |
409 | Conflict |
410 | Gone |
411 | Length Required |
412 | Precondition Failed |
413 | Request Entity Too Large |
414 | Request-URI Too Large |
415 | Unsupported Media Type |
500 | Internal Server Error |
501 | Not Implemented |
502 | Bad Gateway |
503 | Service Unavailable |
504 | Gateway Time-out |
505 | HTTP Version not supported |
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