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javaproxysocks

How to use URLConnection Timeout


I am trying to sort through a list of SOCKS proxies, and figure out which ones have a connect and read time of less than 1000ms, here is my code

for(Proxy p : proxies) {
            try {
            URLConnection testConnection = testUrl.openConnection(p);
            testConnection.setConnectTimeout(TIMEOUT_VALUE);
            testConnection.setReadTimeout(TIMEOUT_VALUE);
            success.add(p);
            } catch(SocketTimeoutException ste) {
                System.out.println("Proxy " + p.address().toString() + " timed out.");
            }
        }

But every single one of them passes the test, even when I do TIMEOUT_VALUE = 1; What am I doing wrong? Thanks for any help.


Solution

  • I assume your problem is you don't read anything from connection. If I set TIMEOUT_VALUE too low, I get an exception. Whether I read all response or only one line did not affect the resulting time, I guess it is because I got whole answer in one packet.

    Here is the measurement I used (without proxies):

        int TIMEOUT_VALUE = 1000;
        try {
            URL testUrl = new URL("http://google.com");
            StringBuilder answer = new StringBuilder(100000);
    
            long start = System.nanoTime();
    
            URLConnection testConnection = testUrl.openConnection();
            testConnection.setConnectTimeout(TIMEOUT_VALUE);
            testConnection.setReadTimeout(TIMEOUT_VALUE);
            BufferedReader in = new BufferedReader(new InputStreamReader(testConnection.getInputStream()));
            String inputLine;
    
            while ((inputLine = in.readLine()) != null) {
                answer.append(inputLine);
                answer.append("\n");
            }
            in.close();
    
            long elapsed = System.nanoTime() - start;
            System.out.println("Elapsed (ms): " + elapsed / 1000000);
            System.out.println("Answer:");
            System.out.println(answer);
        } catch (SocketTimeoutException e) {
            System.out.println("More than " + TIMEOUT_VALUE + " elapsed.");
        }