Play Framework 完整实现一个APP（7）_.NET Framework

Play Framework 完整实现一个APP（七）

1.添加验证码

Application Controller添加captcha()

public static void captcha() {	Images.Captcha captcha = Images.captcha();	renderBinary(captcha);}

添加Route

GET     /captcha                                Application.captcha

访问 http://localhost:9000/captcha

验证码图片已经实现了，现在需要做的是验证输入信息与验证码一致

修改captcha()方法

	public static void captcha(String id) {		Images.Captcha captcha = Images.captcha();		String code = captcha.getText("#E4EAFD");		Cache.set(id, code, "10mn");		renderBinary(captcha);	}

修改show()方法

public static void show(Long id) {    Post post = Post.findById(id);    String randomID = Codec.UUID();    render(post, randomID);}

修改show.html页面

在Comment下方添加验证码图片，和验证控件

   <p>        <label for="content">Your message: </label>        <textarea name="content" id="content">${params.content}</textarea>    </p>    <p>    	<label for="code">Please type the code below: </label>    	<img src="@{Application.catcha(randomId)}">    	<br />    	<input type="text" name="code" id="code" size="18" value="" />    	<input type="hidden" name="randomId" value="${randomId}" />    </p>    <p>        <input type="submit" value="Submit your comment" />    </p>

2.验证

修改postComment 方法

public static void postComment(			Long postId, 			@Required(message="Author is required") String author,			@Required(message="A message is required") String content,			@Required(message="Please type the code") String code,			String randomId) {	    Post post = Post.findById(postId);	    validation.equals(code, Cache.get(randomId)).message("Invalid code. Please type it again");	    	    if(validation.hasErrors()) {	    	 render("Application/show.html", post);	    }	    	    post.addComment(author, content);	    flash.success("Thanks for posting %s", author);	    Cache.delete(randomId);	    show(postId);}

修改show.html页面

   #{ifErrors}        <p class="error">            ${errors[0]}        </p>    #{/ifErrors}