Rob,
Thanks for your response. I have the feeling some of the restlet
functionality is really working for me now. But still some problems
remain...
I tried your suggestion and inserted the line like so:
...
Response response = new Client(Protocol.HTTP).get(uri);
DomRepresentation document = response.getEntityAsDom();
// Use XPath to find the interesting parts of the data structure
response.getEntity().write(System.out);
String expr = "/ResultSet/Result/Title";
for (Node node : document.getNodes(expr)) {
System.out.println(node.getTextContent());
}
...
To find that the xml response text has extraneous characters before and
after (see below for the run log).
o) What subsystem generates these characters?
o) I find it strange that this apparently affects the value the variable
document holds, because the earlier [Fatal Error] message is no longer
there. An exception is still thrown at the same line as before though
(For (Node node : document.getNodes(expr)) {).
o) I also puzzled by the fact that the uri is reported invalid. Is the
yahoo server telling me or is this a restlet request/client message?
When I copy/paste the uri in my browser I get more text as a response.
o) If possible, can you send me your eclipse project so I can try to
have no problems ;-)
Again, any help is appreciated.
Kind regards,
--Aadjan
Run log (after inserting response.getEntity().write(System.out);):
[Session started at 2007-09-28 17:14:26 +0200.]
Sep 28, 2007 5:14:28 PM com.noelios.restlet.http.StreamClientHelper start
INFO: Starting the HTTP client
151
<?xml version="1.0" encoding="UTF-8"?>
<Error xmlns="urn:yahoo:api">
The following errors were detected:
<Message>invalid value: uri -
http://api.search.yahoo.com/WebSearchService/V1/webSearch?appid=restbook&query=bootsmade</Message>
</Error>
<!-- ws01.search.re2.yahoo.com uncompressed/chunked Fri Sep 28 08:14:32
PDT 2007 -->
0
Exception in thread "main" java.lang.NullPointerException
at Example2_1b.main(Example2_1b.java:50)
--------------- [end log]
Rob Heittman wrote:
The XML parser in use is complaining about whitespace or characters
appearing before the <?xml version="1.0"?> statement. I just ran the
example on my OS X 10.4 machine and did not have trouble, though I'm
using Eclipse and not Xcode.
Can you insert something like
response.getEntity().write(System.out);
to spot anything wrong with the XML you are getting from Yahoo (or
whatever server you are hitting, if you've changed the example to be
a client of something else?)
- Rob
----- Original Message -----
From: "Aadjan van der Helm" <[EMAIL PROTECTED]>
To: [email protected]
Sent: Thursday, September 27, 2007 4:23:56 PM (GMT-0500) America/New_York
Subject: Trying to run book example2_1a
Dear list,
I'm evaluating the restlet framework to see if we can use it to create
clients for our restful image server.
It's been a while since I was actively coding in java and it took a
while to get an xcode project (I'm on osx 10.4.10) into a shape to get
the book examples to compile and run.
Now I've worked that out up to a point that eg. example 2_1a compiles
but generates a runtime error:
[Fatal Error] :1:1: Content is not allowed in prolog.
It dies in the loop to iterate over the requested items in the document.
// Use XPath to find the interesting parts of the data structure
String expr = "/ResultSet/Result/Title";
for (Node node : document.getNodes(expr)) {
System.out.println(node.getTextContent());
}
Any clues what is going wrong?
Thanks in advance,
--Aadjan
Run log:
[Session started at 2007-09-27 22:08:45 +0200.]
Sep 27, 2007 10:08:47 PM com.noelios.restlet.http.StreamClientHelper start
INFO: Starting the HTTP client
[Fatal Error] :1:1: Content is not allowed in prolog.
Exception in thread "main" java.lang.NullPointerException
at Example2_1a.main(Example2_1a.java:46)
java has exited with status 1.
