17
I get
xhrequest.readyState == 4 && xhrequest.status == 200 ... 4 & 200 , but no data (local host run)
is this correct
1)var titles = xhrequest.responseXML.getElementsByTagName('title' );
titles[0].firstChild.nodeValue+"</h1>";
2)xml file same folder as .java file in NETBEANS
client
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- <%--
- Document : index
- Created on : Jul 22, 2010, 11:32:20 AM
- Author : Shop
- --%>
- <%@page contentType="text/html" pageEncoding="UTF-8"%>
- <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
- "http://www.w3.org/TR/html4/loose.dtd">
- <html>
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
- <title>JSP Page</title>
- <script type="text/javascript">
- // getxmlhttprequest.js
- function getXMLHttpRequest()
- {
- var xhrequest = null;
- if(window.XMLHttpRequest)
- {
- // If IE7, Mozilla, Safari, etc: Use native object
- try
- {
- xhrequest = new XMLHttpRequest();
- return xhrequest;
- }
- catch(exception)
- {
- // OK, just carry on looking
- }
- }
- else
- {
- // ...otherwise, use the ActiveX control for IE5.x and IE6
- var IEControls = ["MSXML2.XMLHttp.5.0","MSXML2.XMLHttp.4.0","MSXML2.XMLHttp.3.0","MSXML2.XMLHttp"];
- for(var i=0; i<IEControls.length; i++)
- {
- try
- {
- xhrequest = new ActiveXObject(IEControls[i]);
- return xhrequest;
- }
- catch(exception)
- {
- // OK, just carry on looking
- }
- }
- // if we got here we didn�t find and matches
- throw new Error("Cannot create an XMLHttpRequest");
- }
- }
- //processnewsfeed.js
- function processRSSFeed()
- {
- alert("alert processRSSFeed() "+ xhrequest.readyState + " " + xhrequest.status);
- if(xhrequest.readyState == 4 && xhrequest.status == 200)
- {
- alert("alert readyState/status success processRSSFeed()");
- var titles = xhrequest.responseXML.getElementsByTagName('title');
- var links = xhrequest.responseXML.getElementsByTagName('link');
- var descriptions = xhrequest.responseXML.getElementsByTagName('description');
- var firstItemTitle = "<h1>"+titles[0].firstChild.nodeValue+"></h1>";
- var firstItemLink = "<h3>"+links[0].firstChild.nodeValue+"</h3>";
- var firstItemDescription = "<h3>"+descriptions[0].firstChild.nodeValue+"</h3>";
- intro = firstItemTitle+firstItemLink+firstItemDescription;
- //alert(links[0].firstChild.nodeValue);
- for (var i=1; i<=3; i++)
- {
- var firstItemTitle2 = "<p>"+"<h2>"+titles[i].firstChild.nodeValue+"</h2>";
- var firstItemLink2 = "<h3>"+links[i].firstChild.nodeValue+"</h3>";
- var firstItemDescription2 = "<h3>"+descriptions[i].firstChild.nodeValue+"</h3>"+"</p>";
- total += firstItemTitle2+firstItemLink2+firstItemDescription2+"";
- }
- document.getElementById("feed").innerHTML=intro+total;
- }
- }
- function ajaxGetRSS()
- {
- // no 'var', so this is a global variable!
- alert("alert ajaxGetRSS()");
- xhrequest = null;
- try
- {
- xhrequest = getXMLHttpRequest();
- }
- catch(error)
- {
- document.write("Cannot run Ajax code using this browser");
- }
- if(xhrequest != null)
- {
- xhrequest.onreadystatechange = processRSSFeed;
- xhrequest.open("POST", "http://localhost:8084/ParsonsWebServicesAjax/rssfeed", true);
- xhrequest.send(null);
- }
- }
- </script>
- </head>
- <body>
- <h2>Hello World!</h2>
- <br /><form action="" onsubmit="ajaxGetRSS();">
- <input type="submit" value="Press Appear Data" name="getData" />
- <br /></form>
- <a >click here</a>
- <p> </p>
- <div id="feed"></div>
- </body>
- </html>
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- /*
- * To change this template, choose Tools | Templates
- * and open the template in the editor.
- */
- import java.io.*;
- import java.net.*;
- import javax.servlet.*;
- import javax.servlet.http.*;
- /**
- *
- * @author Shop
- */
- public class AjaxRSSServlet extends HttpServlet {
- /**
- * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
- * @param request servlet request
- * @param response servlet response
- */
- @Override
- protected void doPost(HttpServletRequest request, HttpServletResponse response)
- throws ServletException, IOException {
- PrintWriter out = null;
- try {
- response.setContentType("text/xml");
- out = response.getWriter();
- File xmlfile = new File("bookrss.xml");
- StringBuffer sb = new StringBuffer();
- BufferedReader br = new BufferedReader(new FileReader(xmlfile));
- String s = br.readLine();
- while (s != null)
- {
- sb.append(s.trim());
- s=br.readLine();
- }
- System.out.println(sb);
- out.print(sb);
- } catch(IOException e) {
- e.printStackTrace();
- //return null;
- }
- //return null;
- }
- }
- bookrss.xml // version is correct?
- <rss version="0.91">
- <channel>
- <title>hT</title>
- <link>hL</link>
- <description>hD</description>
- <item>
- <title>hT1</title>
- <link>hL1</link>
- <description>hD1</description>
- </item>
- <item>
- <title>hT2</title>
- <link>hL2</link>
- <description>hD2</description>
- </item>
- <item>
- <title>hT3</title>
- <link>hL3</link>
- <description>hD3</description>
- </item>
- </channel>
- </rss>
