org.xaloon.wicket.component.captcha.ReCaptchaValidator.java Source code

Introduction

Here is the source code for org.xaloon.wicket.component.captcha.ReCaptchaValidator.java

Source

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.xaloon.wicket.component.captcha;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Serializable;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * http://www.xaloon.org
 * 
 * @author vytautas racelis
 */
public class ReCaptchaValidator implements Serializable {
    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    private static final Log log = LogFactory.getLog(ReCaptchaValidator.class);

    public static boolean validate(String privateKey, String remoteAddress, String response, String challenge) {
        HttpClient client = new HttpClient();
        PostMethod post = new PostMethod("http://api-verify.recaptcha.net/verify");
        post.addParameter("privatekey", privateKey);

        post.addParameter("remoteip", remoteAddress);
        post.addParameter("challenge", challenge);
        post.addParameter("response", response);
        try {
            int code = client.executeMethod(post);
            if (code != HttpStatus.SC_OK) {
                throw new RuntimeException("Could not send request: " + post.getStatusLine());
            }
            String resp = readString(post.getResponseBodyAsStream());
            if (resp.startsWith("false")) {
                return false;
            }
        } catch (Exception e) {
            log.error(e);
        }

        return true;
    }

    private static String readString(InputStream is) {
        BufferedReader br = new BufferedReader(new InputStreamReader(is));
        StringBuilder sb = new StringBuilder();
        String line = null;
        try {
            while ((line = br.readLine()) != null) {
                sb.append(line);
            }
            br.close();
        } catch (Exception e) {
            log.error(e);
        }
        return sb.toString();
    }
}