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# SOAP HTTP Protocol * * * ## HTTP Protocol HTTP communicates on top of TCP/IP. An HTTP client uses TCP to connect to an HTTP server. After establishing a connection, the client can send an HTTP request message to the server: POST /item HTTP/1.1Host: 189.123.255.239Content-Type: text/plain Content-Length: 200 Subsequently, the server processes this request and then sends an HTTP response back to the client. This response contains a status code that indicates the status of the request: 200 OK Content-Type: text/plain Content-Length: 200 In the example above, the server returned a status code of 200. This is HTTP's standard success code. If the server cannot decode the request, it might return something like this: 400 Bad RequestContent-Length:plural