application/xml versus text/xml content types
I am trying to get an XML response from a servlet. The servlet returns a content type of "application/xml". Using XmlHttpRequest, I can get responseText, but not responseXml. I was wondering if this had something to do with the content type or the request type (I'm doing a GET)...?
Many thanks!
I've pared down all my files. I think I'm setting that all correctly. Here's what I have:
------- HTML ------
<html>
<head>
<title></title>
<script src="js/jboard_simple.js" type="text/javascript">开发者_StackOverflow; </script>
</head>
<body>
<div id="myDiv">
<h2>No results yet....</h2>
</div>
<form name="searchForm" id="searchForm_id">
<input type="text" name="searchString" id="searchString_id" />
<button type="button" onclick="loadXMLDoc()">Perform Search</button>
</form>
</body>
</html>
------- JavaScript -----------
function loadXMLDoc() {
document.getElementById("myDiv").innerHTML = "searching...";
var xmlhttp;
if (window.XMLHttpRequest) {
xmlhttp = new XMLHttpRequest();
} else {
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
// Do something here...
alert(xmlhttp.responseText);
alert(xmlhttp.responseXml);
processSearchServletResponse(xmlhttp.responseText);
}
}
// Find teh search string
var searchString_el = window.document.getElementById('searchString_id');
var searchString = searchString_el.value;
alert('searchString: ' + searchString);
var searchUrl = "/SimpleServlet?searchString=" + searchString;
xmlhttp.open("GET", searchUrl, true);
xmlhttp.send();
}
function processSearchServletResponse(xmlTxt) {
document.getElementById("myDiv").innerHTML = xmlTxt;
}
------- Servlet --------
import java.io.BufferedOutputStream;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.log4j.Logger;
import org.apache.log4j.LogManager;
public class SimpleServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private static Logger logger = LogManager.getRootLogger();
public void service(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
BufferedOutputStream bs = null;
String simpleResponse = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><root>hi</root>";
try {
res.setContentType("text/xml");
res.setCharacterEncoding("UTF-8");
bs = new BufferedOutputStream(res.getOutputStream());
bs.write(simpleResponse.getBytes());
} catch (Exception ex) {
logger.error("JboardSearchServlet.service(): error = ", ex);
} finally {
bs.flush();
bs.close();
}
}
}
Oh dear! I just figured out my whole problem (after someone else looked at it).
I was using 'responseXml' rather than 'responseXML'. Darn those upper case letters =)
加载中,请稍侯......
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