[SOLVED] Getting 301 while doing HTTP get call using Java but getting 200 while doing same using Postman

Getting 301 while doing HTTP get call using Java but getting 200 while doing same using Postman

I am using Java for doing a GET request on a given URL. I am getting 301 error. But when I do the same GET req using postman, I am getting 200. I am not able to figure out what is wrong. Here is my Java code-

public static void main(String args[]) throws IOException {
    URL url = new URL("http://cdn-api.co-vin.in/api/v2/appointment/sessions/public/findByDistrict/?district_id=637&date=22-05-2021");
    HttpURLConnection con = (HttpURLConnection) url.openConnection();
    con.setRequestMethod("GET");
    con.setRequestProperty("User-Agent", "PostmanRuntime/7.26.10");
    con.setRequestProperty("Accept-Language", "en_US");
    con.setRequestProperty("Content-Type", "application/json");
    con.setRequestProperty("Accept", "application/json");
    BufferedReader in = new BufferedReader(new InputStreamReader( con.getInputStream()));
    String inputLine;
    while ((inputLine = in.readLine()) != null) {
        System.out.println(inputLine);
    }
    in.close();
}

Let me know if this can be resolved.

Solution

If you are getting 301 Moved HTTP status code, there is a redirection happening at the server, and, the HttpURLConnection is supposed to follow redirects only if they use the same protocol. Hence, you should try changing the URL protocol from http:// to https://