HowToRequestAHTTPWebServiceFromAXWikiPage

Last modified by Jerome on 2008/09/24

Question How to request a HTTP Web Service from a XWiki Document
Answer You can do this using the Groovy programming language. (You will need to have programming rights when saving the document).

Example : requesting the Twitter public time line in XML format

<%
        try {
            URL timelineURL = new URL("http://twitter.com/statuses/public_timeline.xml");

def connection = timelineURL.openConnection(); def text = connection.content.text

// The following only prints the returned XML // in the wiki page as a "code" block. // You should replace it by your processing code to // exploit only the data relevant to you print ("{" + "code}\n") print text + "\n" print ("{" + "code}\n") } catch(Exception e) {print e.message} %>

See http://java.sun.com/j2se/1.4.2/docs/api/java/net/HttpURLConnection.html for more information about possibilities of a HTTP connection.

Now if your Web Services requires authentication and support Basic Authentication, you can adapt from the following snippet, that does a POST request with credentials embed in a Authorization header, to post a status update on Twitter :

<%
   try {
     updateURL = new URL("http://twitter.com/statuses/update.xml");

def connection = updateURL.openConnection();

connection.setRequestProperty("Authorization", "Basic " + (new sun.misc.BASE64Encoder().encode("username:password".getBytes())));

connection.setDoOutput(true); connection.setRequestMethod("POST");

def osr = new OutputStreamWriter(connection.getOutputStream()); osr.write("status="+"Here the status you want to update"); osr.close();

def responseText = connection.content.text

//[...]

} catch (Exception e) { print( e.message + "\n" ) } %>

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Created by Jerome on 2008/09/24
   

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