Difference between revisions of "Java code for verification class"

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.StringReader;
import java.net.URL;
 
import javax.json.Json;
import javax.json.JsonObject;
import javax.json.JsonReader;
import javax.net.ssl.HttpsURLConnection;
 
public class VerifyRecaptcha {
 
    public static final String url = "https://www.google.com/recaptcha/api/siteverify";
    public static final String secret = "<secret key>";
    private final static String USER_AGENT = "Mozilla/5.0";
 
    public static boolean verify(String gRecaptchaResponse) throws IOException {
        if (gRecaptchaResponse == null || "".equals(gRecaptchaResponse)) {
            return false;
        }
 
        try{
        URL obj = new URL(url);
        HttpsURLConnection con = (HttpsURLConnection) obj.openConnection();
 
        // add reuqest header
        con.setRequestMethod("POST");
        con.setRequestProperty("User-Agent", USER_AGENT);
        con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
 
        String postParams = "secret=" + secret + "&response="
                + gRecaptchaResponse;
 
        // Send post request
        con.setDoOutput(true);
        DataOutputStream wr = new DataOutputStream(con.getOutputStream());
        wr.writeBytes(postParams);
        wr.flush();
        wr.close();
 
        int responseCode = con.getResponseCode();
        System.out.println("\nSending 'POST' request to URL : " + url);
        System.out.println("Post parameters : " + postParams);
        System.out.println("Response Code : " + responseCode);
 
        BufferedReader in = new BufferedReader(new InputStreamReader(
                con.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();
 
        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();
 
        // print result
        System.out.println(response.toString());
 
        //parse JSON response and return 'success' value
        JsonReader jsonReader = Json.createReader(new StringReader(response.toString()));
        JsonObject jsonObject = jsonReader.readObject();
        jsonReader.close();
 
        return jsonObject.getBoolean("success");
        }catch(Exception e){
            e.printStackTrace();
            return false;
        }
    }
}