RestEasy 3.x 系列之三：jsonp

跨域请求解决方法(JSONP, CORS)提到解决跨域可以使用jsonp，RestEasy自带jsonp的拦截器

一、RestEasy的文档如下：

If you're using Jackson, Resteasy has JSONP that you can turn on by adding the providerorg.jboss.resteasy.plugins.providers.jackson.JacksonJsonpInterceptor (Jackson2JsonpInterceptor if you're using the Jackson2 provider) to your deployments. If the media type of the response is json and a callback query parameter is given, the response will be a javascript snippet with a method call of the method defined by the callback parameter. For example:

GET /resources/stuff?callback=processStuffResponse

will produce this response:

processStuffResponse(<nomal JSON body>)

This supports the default behavior of jQuery.

You can change the name of the callback parameter by setting the callbackQueryParameter property.

意思是：1、添加org.jboss.resteasy.plugins.providers.jackson.Jackson2JsonpInterceptor拦截器。2、media type为json。3、有一个callback参数。

二、试验一下

　　1、json和jsonp都在resteasy-jackson2-provider里面，pom.xml:

		<dependency>
			<groupId>org.jboss.resteasy</groupId>
			<artifactId>resteasy-jackson2-provider</artifactId>
			<version>3.0.9.Final</version>
		</dependency>

　　2、web.xml:

	<context-param>
		<param-name>resteasy.providers</param-name>
		<param-value>org.jboss.resteasy.plugins.providers.jackson.Jackson2JsonpInterceptor</param-value>
	</context-param>

但是有问题，最后使用

GET http://localhost:8080/RestEasy_02_Jsonp/json/product/get?callback=aaa

返回：aaa({"name":"iPad 3","age":999}

注意后面少了一个")"

但是

POST http://localhost:8080/RestEasy_02_Jsonp/json/product/post?callback=back

返回：back(Product created : com.tutu.domain.Product@5ad557c2) 正常

不知道什么问题，有知道的麻烦告诉一下 

三、源码下载

　　附件：RestEasy_02_jsonp.zip

参考：http://stackoverflow.com/questions/5350924/how-enable-jsonp-in-resteasy