Executing a servlet so that my doGet method is called

Question

I'm catching a device event, and based on info coming from it it I need to do a login. If the login is verified, I want to move to the next page of my application.

I tried doing it with HttpURLConnection but it doesn't actually execute the servlet.

This is the genetic code I'm using:

public static String getResponseFromUrl(String url) throws Exception {
    URL website = new URL(url);

    HttpURLConnection connection = (HttpURLConnection)website.openConnection();
    connection.setRequestMethod("GET"); 
    connection.setRequestProperty("Content-Type", "application/json; charset=utf-8");
    connection.setUseCaches(false);

    BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
    String response = "";
    String inputLine;

    while ((inputLine = in.readLine()) != null) 
        response += inputLine;

    in.close();

    return response.toString();
}

I also tried

InputStream responseInputStream = connection.getInputStream();

but with the same result. The doGet method is not being called, and obviously the app doesn't move to the next page.

I'm pretty sure this can be done by catching the event inside the JSP page but I was hoping there's an easier solution.

EDIT: When submitting the same URL in the browser it all works. The doGet is called and the app moves to the next page.

doGet() not called mean doGet() not invoked or getResponseFromUrl() not invoke ? or something else — Vishal Gajera, Dec 02 '15 at 15:51
getResponseFromUrl() is called and runs with no errors. But the doGet isn't getting called. — Eddy, Dec 02 '15 at 15:56
it means into starting when Get-request made at that time doGet() not invoked right ? and if doGet not invoke means all other bla bla not execute. am i correct thinking ? — Vishal Gajera, Dec 02 '15 at 15:57
have you ANOTHER servlet which works, called like that ? Have you checks all logs ? — guillaume girod-vitouchkina, Dec 02 '15 at 16:17
if you have an empty response, you have a response: then you should see something in logs. — guillaume girod-vitouchkina, Dec 02 '15 at 16:23

score -1 · Answer 1 · answered Dec 02 '15 at 16:03

From the Doc :

   URL url = new URL("http://www.android.com/");
   HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
   try {
     InputStream in = new BufferedInputStream(urlConnection.getInputStream());
     readStream(in);
    finally {
     urlConnection.disconnect();
   }
 }

Try with "readStream(in);"

If it still doesn works, the error must be from the URL. u say u have a doGet method at this url, try with your browser to be sure the URL reponds. Do you really need a different doGet/doPost ? use "service" method instead

Have u tried this code ? Maybe the doGet method is called but doesnt move to next page — MeGoodGuy, Dec 02 '15 at 16:17

Executing a servlet so that my doGet method is called

1 Answers1