The Java Developers Almanac 1.4

e1071. Sending a POST Request Using a Socket

    try {
        // Construct data
        String data = URLEncoder.encode("key1", "UTF-8") + "=" + URLEncoder.encode("value1", "UTF-8");
        data += "&" + URLEncoder.encode("key2", "UTF-8") + "=" + URLEncoder.encode("value2", "UTF-8");
    
        // Create a socket to the host
        String hostname = "hostname.com";
        int port = 80;
        InetAddress addr = InetAddress.getByName(hostname);
        Socket socket = new Socket(addr, port);
    
        // Send header
        String path = "/servlet/SomeServlet";
        BufferedWriter wr = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream(), "UTF8"));
        wr.write("POST "+path+" HTTP/1.0\r\n");
        wr.write("Content-Length: "+data.length()+"\r\n");
        wr.write("Content-Type: application/x-www-form-urlencoded\r\n");
        wr.write("\r\n");
    
        // Send data
        wr.write(data);
        wr.flush();
    
        // Get response
        BufferedReader rd = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        String line;
        while ((line = rd.readLine()) != null) {
            // Process line...
        }
        wr.close();
        rd.close();
    } catch (Exception e) {
    }

Related Examples

e147. Creating a Client Socket
e148. Creating a Server Socket
e149. Reading Text from a Socket
e150. Writing Text to a Socket

See also: Datagram    Encodings    HTTP    Hostnames and IP Addresses    Multicast    URLs

© 2002 Addison-Wesley.