What's Recaptcha? #

Recaptcha is a Google service that generates captchas. It alternatively has sound-based captchas for the hard of sight.

Why recaptcha? #

It tends to be faster (doesn't use your servers to generate the captcha) and has the sound feature that SimpleCaptcha (the default captcha system in Liferay) doesn't have.

Enable Recaptcha in Liferay #

To enable it, add this to your portal-ext.properties (if you're in the tomcat bundle that's tomcat-{version}/webapps/ROOT/WEB-INF/classes/portal-ext.properties). If the file doesn't exist, you should create it (and read about how to configure a real database, because using HSQL for a real site is not a good idea).

Copy and paste the following, but then go to http://www.google.com/recaptcha to get your public and private keys.

# Enable or not reCaptcha



# Urls to access reCaptcha services

#reCaptcha domain specific keys
captcha.engine.recaptcha.key.private=YOUR KEY. FROM google.com/recaptcha.
captcha.engine.recaptcha.key.public=YOUR KEY. FROM google.com/recaptcha.

NOTE: Make sure when you copy these three lines below, that you copy without the brackets:

captcha.engine.recaptcha.url.noscript=http://api.recaptcha.net/noscript?k= captcha.engine.recaptcha.url.verify=http://api-verify.recaptcha.net/verify }}}

Starting in Liferay 6.1, Recaptcha can be enabled in the control panel under "Server Administration." See Easily Improve your Captcha for more information.

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讨论主题回复 作者 日期
Cool thanks a lot Samuel Corné Aussems 2010年7月27日 下午10:53
If you need to use ReCaptcha on an... James Denmark 2011年3月22日 下午12:05
http://groups.google.com/group/recaptcha/browse... James Denmark 2011年3月22日 下午12:07

在 10-7-27 下午10:53 发帖。
If you need to use ReCaptcha on an ssl-encrypted site the links above will throw security violations in the browser. For secure access to recaptcha the properties above can be changed to https://api-secure.recaptcha.net/XXX but they are changing on 11-Apr-2011 from https://api-secure.recaptcha.net/XXX to https://www.google.com/recaptcha/api/XXX.

<a href="http://groups.google.com/group/recaptcha/browse_thread/thread/57baacc2a067­035a">Link to discussion on ReCaptcha Google Group</a>
在 11-3-22 下午12:05 发帖。
在 11-3-22 下午12:07 发帖以回复 James Denmark