|
|
| Line 1: |
Line 1: |
| − | This class has a static method called verify which takes the captcha response and checks it against google<br>
| |
| − | <source lang="java">
| |
| − | 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;
| |
| − | }
| |
| − | }
| |
| − | }
| |
| − |
| |
| − | </source>
| |
