Wiki » History » Version 3
Soh Keong, 09/22/2004 03:16 AM
| 1 | 1 | Soh Keong | {{toc}} |
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| 2 | |||
| 3 | h1. Wiki |
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| 4 | |||
| 5 | h1. Guides |
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| 6 | |||
| 7 | h2. Demo URL |
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| 8 | |||
| 9 | The URL is: |
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| 10 | > http://192.168.2.68:8080/TestPage/page/captcha/recaptcha.jsp |
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| 11 | |||
| 12 | h2. Steps By Steps |
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| 13 | |||
| 14 | h3. Create Public Key and Private Key |
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| 15 | |||
| 16 | # Visit http://www.google.com/recaptcha/admin |
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| 17 | # Sign in with your email and password (If no account with google, please proceed with sign up.) |
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| 18 | # After sign in, Click on 'Add a New Site' button. |
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| 19 | # Enter domain name in the text field, and click on the 'Create Key' button. |
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| 20 | # Now, Public Key and Private Key is generated. |
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| 21 | |||
| 22 | h3. Client site JSP |
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| 23 | |||
| 24 | <pre> |
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| 25 | <%@ page import="net.tanesha.recaptcha.ReCaptcha" %> |
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| 26 | <%@ page import="net.tanesha.recaptcha.ReCaptchaFactory" %> |
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| 27 | |||
| 28 | <html> |
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| 29 | <body> |
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| 30 | <form action="" method="post"> |
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| 31 | <% |
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| 32 | ReCaptcha c = ReCaptchaFactory.newReCaptcha("your_public_key", "your_private_key", false); |
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| 33 | out.print(c.createRecaptchaHtml(null, null)); |
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| 34 | %> |
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| 35 | <input type="submit" value="submit" /> |
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| 36 | </form> |
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| 37 | </body> |
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| 38 | </html> |
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| 39 | </pre> |
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| 40 | |||
| 41 | h3. Server site JSP |
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| 42 | |||
| 43 | <pre> |
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| 44 | <%@ page import="net.tanesha.recaptcha.ReCaptchaImpl" %> |
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| 45 | <%@ page import="net.tanesha.recaptcha.ReCaptchaResponse" %> |
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| 46 | |||
| 47 | <html> |
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| 48 | <body> |
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| 49 | <% |
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| 50 | String remoteAddr = request.getRemoteAddr(); |
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| 51 | ReCaptchaImpl reCaptcha = new ReCaptchaImpl(); |
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| 52 | reCaptcha.setPrivateKey("your_private_key"); |
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| 53 | |||
| 54 | String challenge = request.getParameter("recaptcha_challenge_field"); |
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| 55 | String uresponse = request.getParameter("recaptcha_response_field"); |
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| 56 | ReCaptchaResponse reCaptchaResponse = reCaptcha.checkAnswer(remoteAddr, challenge, uresponse); |
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| 57 | |||
| 58 | if (reCaptchaResponse.isValid()) { |
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| 59 | out.print("Answer was entered correctly!"); |
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| 60 | } else { |
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| 61 | out.print("Answer is wrong"); |
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| 62 | } |
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| 63 | %> |
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| 64 | </body> |
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| 65 | </html> |
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| 66 | </pre> |
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| 67 | |||
| 68 | |||
| 69 | h3. DNS Caching (Important) |
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| 70 | |||
| 71 | -Dsun.net.inetaddr.ttl=30 to your app-server to avoid connection between your server and reCAPTCHA to be interrupted every few months. |
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| 72 | 3 | Soh Keong | * References: * |
| 73 | # https://www.google.com/recaptcha (Retrieved 29 July2013) |
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| 74 | # https://developers.google.com/recaptcha/docs/java (Retrieved 29 July2013) |