How to display a xml in browser after inoke soap?

[lyo Yashnoo]

HI everyone:

I am a new developer in webservice soap. I come across a problem.
I want to invoke a soap method which return a List for example:

(['li','22','[e-mail]'],
['l','33','[e-mail]'],
['yo','24','[e-mail]'])

Now I want to display them in client's browser. What client will see in browser is :

<?xml version="1.0"?>
<root>
<person>
   <name>li</name>
   <age>22</age>
   <email>[e-mail]</email>
</person>
<person>
   <name>l</name>
   <age>32</age>
   <email>[e-mail]</email>
</person>
.................
</root>

But I don't know how to send the List to client and display them. Could I　use Inputstream to do this?
Must I create xml document in server and send it to clients? I expect that I can do this using Stream.
Anyone can tell me how to send the data using Stream.
Thks!

[Balaji Loganathan]

Originally posted by lyo Yashnoo:

Must I create xml document in server and send it to clients? I expect that I can do this using Stream.
Anyone can tell me how to send the data using Stream.
Thks!

Yes!
A simple servlet or jsp to convert the list in to xml document structure on the fly. it is important to set the page context and/or response header to text/xml
response.setContentType("text/xml");
response.setHeader("Content-Disposition","inline;filename=viewXML.xml ");
if not you can always show them as a table in HTML.

[lyo Yashnoo]

Thank you for your fast reply.
I know your means. It need set the document header. But I think the main problem is that how to write all the data to a Stream? And send the xml stream to clients? Should I use inputstream or pipestream?

[Balaji Loganathan]

Originally posted by lyo Yashnoo:
Thank you for your fast reply.
I know your means. It need set the document header. But I think the main problem is that how to write all the data to a Stream? And send the xml stream to clients? Should I use inputstream or pipestream?

if i understood your problem correctly..
then all you need to do is..

A servlet to act as a webservice client

Invoke the webservice

Read the response

convert the list in to XML and show them in the webbroswer

You will be using PrintStream from servlet, so you don't have to worry abt other streams.

[lyo Yashnoo]

Hi
I do this in this way but it don't work property. I use it in a servlet.When I click the hyperlink.it redirect a page ,error is:"the root of this document is not valid,error happen when process http://localhost:5050/lyoweb/getxml range1.
my code is:

Document doc=DocumentHelper.createDocument();
//Element type=doc.addElement("<?xml version=\"1.0\" ?>");
Element root=doc.addElement("root");
Element name=root.addElement("name");
name.setText("lyo");
Element age=root.addElement("age");
age.addText("22");
Element email=root.addElement("email");
                        resp.setContentType("text/xml");
resp.setHeader("Content-Disposition","inline;filename=address.xml");
ServletOutputStream so=resp.getOutputStream();

PrintStream ps=new PrintStream(so);
ps.print(doc);
ps.close();

what's wrong with it?
Why it can't disply xml in browser?

[lyo Yashnoo]

If I use the System.out.println(doc). It will print

org.dom4j.xml.DeautXML.....

Why it don't print the xml to Browser? :roll:

[Lasse Koskela]

Take a look at this. (instead of a File, you'd create the StreamResult from the ServletOutputStream)

[Yashnoo lyo]

Thank you for your reply.
I have seen your article.But it is not what I want. I mean I don't want to create a xml in the server.You know there will be many many file created if I use your method. So I want to write the Document to a Stream and send the XML Stream to client 's Browser. But I don't know how to do it
It is possible?

[Balaji Loganathan]

Originally posted by Yashnoo lyo:

I mean I don't want to create a xml in the server.You know there will be many many file created if I use your method.

You got to be missing Lasse point.. read again his reply..
Lasse psoted:(instead of a File, you'd create the StreamResult from the ServletOutputStream)
here is the sample code

public class viewXML extends HttpServlet {

    public void service(HttpServletRequest request,
                      HttpServletResponse response)
        throws IOException, ServletException
    {
response.setContentType("text/html");
//play with the response to work in all browsers
        PrintWriter out = response.getWriter();      
        //prepare the DOM document by reading your list from SOAP response
        Document Dom = ..
        // Convert DOM to String  
        // see XMLWiki of javaranch for example on converting dom to string
//give the string to outputstream
out.write(str);
        out.flush();
    }
}

[Yashnoo lyo]

Thanks!
I find what I what to get . See here
http://www.soapclient.com/SoapData.html
I want to do that!
You say I should use XMLWiki but I search this site find nothing .
If I convert the xml to string, response should be set text/html other than text/xml. But I want to read the xml using Javascript in client. So I muse set the response to "text/xml".
My javascript is simple this:

var Vxml = BiLoader.load("http://localhost:8080/myweb/address.xml");
var root=Vxml.getRoot();
var child=root.nextChild();

The BiLoader is like a XMLDocument load a uri or url.The uri or url must is a xml file.So I expect set the response to "text/xml".
It is possible to do this http://www.soapclient.com/SoapData.html ?

[Lasse Koskela]

When you say "SOAP method returns a list", do you mean java.util.List or something else? If you already have a org.w3c.dom.Document representing the list, you can use this technique for writing the DOM object as raw XML using a servlet. If you have a java.util.List, for example, you can print out the XML by hand:

public void doGet(HttpServletRequest req, HttpServletResponse res) {
    res.setContentType("text/xml");
    PrintWriter out = res.getWriter();
    out.println("<?xml version="1.0"?>");
    out.println("<root>");
    
    List persons = getListFromSoapMethod();
    Iterator personIterator = persons.iterator();
    while (personIterator.hasNext()) {
        Person person = (Person) personIterator.next();
        out.println("  <person>");
        out.println("    <name>" + person.getName() + "</name>");
        out.println("    <age>" + person.getAge() + "</age>");
        out.println("    <email>" + person.getEmail() + "</email>");
        out.println("  </person>");
    }
    out.println("</root>");
}

[ January 30, 2004: Message edited by: Lasse Koskela ]

[Yashnoo lyo]

Thks . The second method is property to me. I will use it. Because I don't want to generate many xml file when client access my site.So I don't expect it will generate a xml on the server when I run the jsp. Is there any useful method convert a Document to String? Now I have a Document object I must convert it to String If I want to display them. I means is there any convinent method to do this?
More :
What the "on the fly" mean? Thks

[Lasse Koskela]

Originally posted by Yashnoo lyo:
Is there any useful method convert a Document to String?

See DocumentToString in our Wiki.

Originally posted by Yashnoo lyo:
What the "on the fly" mean?

It's a saying that, in our profession's context, is used to refer to doing something dynamically instead of statically.
For example, in order to get the current time displayed using a nice graphic on a web page, we can either:
a) generate one static .gif image file for every minute/second/whatever between 00:00-23:59, or
b) generate a .gif image dynamically based on the current system time.
Option B would be what "on the fly" means.

[Yashnoo lyo]

Thanks! Document can't be dislayed before it is converted to String.Yes.I will try it.