为什么没有成功的“带套接字的HTTP GET请求”?

时间:2015-05-04 14:59:06

标签: java android sockets http get

我想在我的Android应用程序中发送GET消息。之后我想收到GET响应为200 OK。但我没有完成。我收到了408 Request Time-outDate或什么都没有。你能救我吗?

    String requestmsg = "GET / HTTP/1.1\r\n";
    requestmsg += "Host: www.ktu.edu.tr\r\n";
    requestmsg += "Connection: keep-alive\r\n";
    requestmsg += "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8\r\n";
    requestmsg += "User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW 64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36\r\n";
    requestmsg += "Accept-Encoding: gzip, deflate, sdch\r\n";
    requestmsg += "Accept-Language: en-US,en;q=0.8,en-GB;q=0.6\r\n";


    DataOutputStream dos = null;
    BufferedReader dis = null;
    try {

        Log.d("ClientActivity", "Connecting...");
        String addr = InetAddress.getByName("www.ktu.edu.tr").getHostAddress().toString();
        Socket socket = new Socket(addr, 80);
        String data = "";

        try {
            Log.d("ClientActivity", "C: Sending command.");

            dos = new DataOutputStream(socket.getOutputStream());
            dis = new BufferedReader(new InputStreamReader(socket.getInputStream()));

            dos.write(requestmsg.getBytes());
            Log.i("ClientActivity", "RequestMsg Sent");

            StringBuilder sb = new StringBuilder();

            while ((data = dis.readLine()) != null) {
                sb.append(data);
            }
            Log.i("ClientActivity", "C: Sent.");
            Log.i("ClientActivity", "C: Received " + sb.toString());
        } catch (Exception e) {
            Log.e("ClientActivity", "S: Error", e);

        }

        socket.close();
        Log.d("ClientActivity", "C: Closed.");
    } catch (Exception e) {
        Log.e("ClientActivity", "C: Error", e);
    }

2 个答案:

答案 0 :(得分:0)

首先,您忘记通过在最后添加另一条\r\n行来正确完成请求。

其次,您正在阅读从服务器获得的所有内容,而无需确定实际响应的持续时间。

请使用HTTP库,或通过学习the HTTP specification来学习正确使用HTTP协议。

答案 1 :(得分:0)

(套接字需要一些努力;您可能更喜欢不同的方法。标准的JSE是URL.openConnection。)

指定编码,否则它是默认的enocding - 不可移植。

new InputStreamReader(socket.getInputStream(), "Windows-1252"));

反方向相同:

requestmsg.getBytes("Windows-1252")

这是Windows Latin-1,即使指定了更有限的Latin-1“ISO-8859-1”,浏览器也会接受。稍后检查编码。

发送标头最好不要说它已准备好使用压缩:

//requestmsg += "Accept-Encoding: gzip, deflate, sdch\r\n";

用空行关闭请求标头:

requestmsg += "\r\n";

BufferedOutputStream更适合DataOutputStream恕我直言。