将Wicket AbstractAjaxBehavior与jQuery.ajax()结合使用 [英] Using Wicket AbstractAjaxBehavior with jQuery.ajax()

问题描述

我已经使用jQuery AJax调用来发送JSON，如

I have used the jQuery AJax call to send JSON as documented here in StackOverflow

问题是我没有在服务器上收到任何数据.我可以看到该调用确实达到了目标ajax行为-但在onRequest()方法中，RequestCycle dd不包含任何参数

The problem is that I am not receiving any Data on the server . I can see that the call did reach the target ajax behavior -- but in onRequest() method , the RequestCycle dd not contain any parameters

我的票务代码:

        AbstractAjaxBehavior ajaxSaveBehaviour = new AbstractAjaxBehavior(){
        private static final long serialVersionUID = 1L;

        @SuppressWarnings("unchecked")
        public void onRequest()
        {
            //get parameters
            final RequestCycle requestCycle = RequestCycle.get();



            final PageParameters pageParameters = new PageParameters(requestCycle.getRequest().getParameterMap());
            logger.info(" I have received something 1");

            for(String pkey: requestCycle.getRequest().getParameterMap().keySet()){
                String[] valArry= requestCycle.getRequest().getParameterMap().get(pkey);
                StringBuffer sb = new StringBuffer();
                for(String s: valArry) sb.append(s).append(" , ");
                logger.info("pk :"+ pkey + " = "+ sb.toString());
            }

            //do something using nice json library to produce a string of json

            logger.info(" I have received something 2");
            for(String key: pageParameters.keySet()){
                Object o= pageParameters.get(key);
                logger.info("received key : "+ key + "   = " +o.toString());                    
            }





            String data="ok";        

            requestCycle.setRequestTarget(new StringRequestTarget("application/json", "utf-8", data));
        }


    };
    add(ajaxSaveBehaviour);
    String callBackURL= ajaxSaveBehaviour.getCallbackUrl().toString();

我的Javascript调用此方法

My Javascript that invokes this method

console.log(" call back url :"+ callBackURL);
           $.ajax({
                url: callBackURL,
                type: 'post',
                cache: false,

                data:JSON.stringify(ccbArry[0]),
                contentType: 'application/json',
                dataType: 'json',
                complete: function() {
                        alert(" completed okey dokey!")
                }

            });

从Firebug控制台中，我可以看到成功完成了JSON POST，并且触发了alert("completed okey dokey！")dos.

From my Firebug console, I can see that the JSON POST was made succesfully and the alert(" completed okey dokey!") dos get triggered.

问题是在Wicket上AbstractAjaxBehavior无法在RequestCycle中找到任何参数.

The problem is that on the Wicket AbstractAjaxBehavior is unable to find any parameters in the RequestCycle.

有什么我想念的吗?有趣的是，我运行的是调试器，因为我找不到任何参数.这看起来像是一个编码问题.

Is there something I am missing ? The funny thing is that I ran this is debugger asn I could not find any parameter. This looks like an encoding issue.

从Firebug中，我可以看到这是发出的呼叫

From Firebug, I could see that this was the call that was made

http://localhost:8080/mywebapp-web-1.0-SNAPSHOT/?wicket:interface=:0::IActivePageBehaviorListener:0:&wicket:ignoreIfNotActive=true&%7B%22type%22%3A9504%2C%22sourceNewsClipBean%22%3A%7B%22type%22%3A9503%2C%22id%22%3A%224cf05752acc1d6aebface86d%22%2C%22typeString%22%3A%22NEWSCLIP_TYPE%22%7D%2C%22startOffset%22%3A%22195%22%2C%22clipDuration%22%3A%22297%22%7D=

以某种方式，这些参数未附加在RequestCycle中.看起来像一个问题.有什么想法吗?

Somehow , these parameters do not apperd in the RequestCycle. It looks like an encodong issue . Any ideas ?

推荐答案

好，我找到了解决方案:关键是不要使用requestCycle.getRequest().getParameterMap()从浏览器读取JSON.而是直接从servlet输入流中读取数据，如下所示: 可以.

ok I found the solution : The keys was to not use requestCycle.getRequest().getParameterMap() to read the JSON from the browser. Instead read the data directly from the servlet input stream as below: It works .

            public void onRequest()
        {
            //get parameters
            final RequestCycle requestCycle = RequestCycle.get();


            WebRequest wr=(WebRequest)requestCycle.getRequest();

            HttpServletRequest hsr= wr.getHttpServletRequest() ;

            try {
                BufferedReader br = hsr.getReader();

                       String  jsonString = br.readLine();
                       if((jsonString==null) || jsonString.isEmpty()){
                           logger.error(" no json found");
                       }
                       else {
                           logger.info(" json  is :"+ jsonString);
                       }



            } catch (IOException ex) {
                logger.error(ex);
            }


            // json string to retir to the jQuery onSuccess function
            String data=getReturnJSONValue();

            logger.info("returning json :"+ data);
            IRequestTarget t = new StringRequestTarget("application/json", "UTF-8", data);
            getRequestCycle().setRequestTarget(t);


            //requestCycle.setRequestTarget(new StringRequestTarget("application/json", "utf-8", data));
        }

这篇关于将Wicket AbstractAjaxBehavior与jQuery.ajax()结合使用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！