reCaptcha验证码 ( by quqi99 )

reCaptcha验证码 ( by quqi99 )

1) util类：

+package com.daodao.util;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.UnsupportedEncodingException;
+import java.net.URL;
+import java.net.URLConnection;
+import java.net.URLEncoder;
+
+import com.TripResearch.util.Logging;
+
+public class GoogleCaptchaUtil
+{
+ private static final String PUBLIC_KEY = "到goole申请";
+ private static final String PRIVATE_KEY = "到goole申请";
+ private static final String VERIFY_URL = "http://api-verify.recaptcha.net/verify";
+ private static final String URL_CHARACTER_ENCODING = "UTF-8";
+
+ public static String getPublicKey()
+ {
+ return PUBLIC_KEY;
+ }
+
+ public static boolean checkAnswer(String remoteAddr, String challenge, String response)
+ {
+ String postParameters;
+ if(remoteAddr == null || challenge == null || response == null)
+ {
+ return false;
+ }
+ try
+ {
+ postParameters = "privatekey=" + URLEncoder.encode(PRIVATE_KEY,URL_CHARACTER_ENCODING) + "&remoteip=" + URLEncoder.encode(remoteAddr,URL_CHARACTER_ENCODING) +
+ "&challenge=" + URLEncoder.encode(challenge,URL_CHARACTER_ENCODING) + "&response=" + URLEncoder.encode(response,URL_CHARACTER_ENCODING);
+ }
+ catch (UnsupportedEncodingException e)
+ {
+ Logging.SERVLET.debug("Unsupported Encoding: " + e.getMessage());
+ return false;
+ }
+ String message = httpPost(VERIFY_URL, postParameters);
+
+ if (message == null) {
+ Logging.SERVLET.debug("Null read from server.");
+ return false;
+ }
+
+ String[] a = message.split("\r?\n");
+ if (a.length < 1) {
+ Logging.SERVLET.debug("No answer returned from recaptcha: " + message);
+ return false;
+ }
+ return "true".equals(a[0]);
+ }
+
+ public static String httpPost(String urlS, String postdata)
+ {
+ InputStream in = null;
+ URLConnection connection = null;
+ try
+ {
+ URL url = new URL(urlS);
+ connection = url.openConnection();
+
+ connection.setDoOutput(true);
+ connection.setDoInput(true);
+ connection.setConnectTimeout(10000);
+ connection.setReadTimeout(10000);
+
+ OutputStream out = connection.getOutputStream();
+ out.write(postdata.getBytes());
+ out.flush();
+
+ in = connection.getInputStream();
+
+ ByteArrayOutputStream bout = new ByteArrayOutputStream();
+ byte[] buf = new byte[1024];
+ while (true)
+ {
+ int rc = in.read(buf);
+ if (rc <= 0)
+ break;
+ else
+ bout.write(buf, 0, rc);
+ }
+
+ out.close();
+ in.close();
+
+ return bout.toString();
+ }
+ catch (IOException e)
+ {
+ Logging.SERVLET.debug("Cannot load URL: " + e.getMessage());
+ return null;
+ }
+ finally
+ {
+ try
+ {
+ if (in != null)
+ in.close();
+ }
+ catch (Exception e)
+ {
+ // swallow.
+ }
+ }
+ }
+
+}

2)这样调用util类：

+ public boolean verifyGoogleCaptcha(CustomServletRequest request)
+ {
+ String remoteAddr = request.getRemoteAddr();
+ String challenge = request.getParameter("recaptcha_challenge_field");
+ String uresponse = request.getParameter("recaptcha_response_field");
+ return GoogleCaptchaUtil.checkAnswer(remoteAddr, challenge, uresponse);
+ }

3）添加vm宏：

+#macro( PrepareGoogleCaptcha )
+ <script type="text/javascript" >
+ var RecaptchaOptions = { theme : 'custom', custom_theme_widget: 'recaptcha_widget' };
+ </script>
+#end

+#macro( ShowGoogleCaptcha )
+ <style type="text/css">
+ #recaptcha_widget { margin-bottom:10px; }
+ #recaptcha_image, #recaptcha_image img { width:180px !important; height:40px !important; }
+ .change-image { float:left; margin:14px 0 0; }
+ .mt5 { margin-top:5px; }
+ </style>
+ <div id="recaptcha_widget" style="display:none">
+ <div class="clearfix">
+ <div id="recaptcha_image" class="left"></div>
+ <div class="change-image"><a href="javascript:Recaptcha.reload()">看不清？ 换一张！</a></div>
+ </div>
+ <div class="mt5">
+ <label for="recaptcha_response_field">请输入验证码:</label>
+ <input type="text" id="recaptcha_response_field" name="recaptcha_response_field" />
+ </div>
+ </div>

+ <div id="CAPTCHA">
+ <script type="text/javascript"
+ src="http://www.google.com/recaptcha/api/challenge?k=$recaptchaPubkey">
+ </script>
+ <noscript>
+ <iframe src="http://www.google.com/recaptcha/api/noscript?k=$recaptchaPubkey" height="300" width="500" frameborder="0"></iframe><br>
+ <textarea name="recaptcha_challenge_field" rows="3" cols="40">
+ </textarea>
+ <input type="hidden" name="recaptcha_response_field" value="manual_challenge">
+ </noscript>
+ </div>
+#end

3） 在vm中用上面的宏

#PrepareGoogleCaptcha()

+ <div class="error">
+ <b>$util.localize("rd_forums_error_header_ffffee49")</b>
+ <ul> <li>- 检证码错误，请重新输入。 </li> </ul>
+ </div>

#ShowGoogleCaptcha()

5) servlet中：

if(ServletUtils.getInstance().verifyGoogleCaptcha(request)){

addObject("invalidCaptcha", true);

// do other

}