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| − | <source lang="java">
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| − | import java.io.BufferedReader;
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| − | import java.io.DataOutputStream;
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| − | import java.io.IOException;
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| − | import java.io.InputStreamReader;
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| − | import java.io.StringReader;
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| − | import java.net.URL;
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| | | | |
| − | import javax.json.Json;
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| − | import javax.json.JsonObject;
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| − | import javax.json.JsonReader;
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| − | import javax.net.ssl.HttpsURLConnection;
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| − |
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| − | public class VerifyRecaptcha {
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| − |
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| − | public static final String url = "https://www.google.com/recaptcha/api/siteverify";
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| − | public static final String secret = "6LfUpyQTAAAAAHsXPxomPWvid-mAnyq-c4GCN5gO";
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| − | private final static String USER_AGENT = "Mozilla/5.0";
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| − |
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| − | public static boolean verify(String gRecaptchaResponse) throws IOException {
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| − | if (gRecaptchaResponse == null || "".equals(gRecaptchaResponse)) {
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| − | return false;
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| − | }
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| − |
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| − | try{
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| − | URL obj = new URL(url);
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| − | HttpsURLConnection con = (HttpsURLConnection) obj.openConnection();
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| − |
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| − | // add reuqest header
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| − | con.setRequestMethod("POST");
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| − | con.setRequestProperty("User-Agent", USER_AGENT);
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| − | con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
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| − |
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| − | String postParams = "secret=" + secret + "&response="
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| − | + gRecaptchaResponse;
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| − |
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| − | // Send post request
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| − | con.setDoOutput(true);
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| − | DataOutputStream wr = new DataOutputStream(con.getOutputStream());
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| − | wr.writeBytes(postParams);
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| − | wr.flush();
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| − | wr.close();
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| − |
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| − | int responseCode = con.getResponseCode();
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| − | System.out.println("\nSending 'POST' request to URL : " + url);
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| − | System.out.println("Post parameters : " + postParams);
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| − | System.out.println("Response Code : " + responseCode);
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| − |
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| − | BufferedReader in = new BufferedReader(new InputStreamReader(
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| − | con.getInputStream()));
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| − | String inputLine;
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| − | StringBuffer response = new StringBuffer();
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| − |
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| − | while ((inputLine = in.readLine()) != null) {
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| − | response.append(inputLine);
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| − | }
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| − | in.close();
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| − |
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| − | // print result
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| − | System.out.println(response.toString());
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| − |
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| − | //parse JSON response and return 'success' value
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| − | JsonReader jsonReader = Json.createReader(new StringReader(response.toString()));
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| − | JsonObject jsonObject = jsonReader.readObject();
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| − | jsonReader.close();
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| − |
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| − | return jsonObject.getBoolean("success");
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| − | }catch(Exception e){
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| − | e.printStackTrace();
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| − | return false;
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| − | }
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| − | }
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| − | }
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| − |
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| − | </source>
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