Java HttpURLConnection issue: Server redirected too many times

Question

I'm working with Java 1.7.

When I test the request with Postman in Firefox, I get a response status : 200, and the Json response is good.

When I test it with my Java application, I get this Exception:

java.net.ProtocolException: Server redirected too many times (20)

Here is my java code:

try{
    String charset = "UTF-8";
    URL url = new URL("http://example.com/ws");
    HttpURLConnection con = (HttpURLConnection) url.openConnection();
    con.setRequestMethod("GET"); 
    con.setRequestProperty("Accept-Charset", charset);
    con.setRequestProperty("token", "mytokenvalue");
    int responseCode = con.getResponseCode();
    BufferedReader in = new BufferedReader(
                        new InputStreamReader(con.getInputStream()));
    String inputLine;
    StringBuffer response = new StringBuffer();
    while ((inputLine = in.readLine()) != null) {
        response.append(inputLine);
    }
    in.close();
    System.out.println(response.toString());
}catch(Exception ex){
    ex.printStackTrace();
}

The exception is thrown in this line:

int responseCode = con.getResponseCode();

So why is your server sending more than 20 redirects? Do you know? try to use some http sniffer to see what its sending back. — JIV, Dec 05 '16 at 10:35
Looks like a redirect loop. What is your server routes configuration? — xenteros, Dec 05 '16 at 10:43
Are you using any kind of authentication? If so, maybe you'll find useful this post: http://stackoverflow.com/questions/11022934/getting-java-net-protocolexception-server-redirected-too-many-times-error — Marco A. Hernandez, Dec 05 '16 at 10:44

score 3 · Accepted Answer · edited Oct 03 '18 at 14:21

3

You have to set this property before you open the connection:

HttpURLConnection.setFollowRedirects(false);

edited Oct 03 '18 at 14:21

Mangu

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answered Oct 03 '18 at 13:21

Tony N.

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Java HttpURLConnection issue: Server redirected too many times

1 Answers1