Hi José,
  Yes, you can consume REST webservices using an App Engine app.
     http://code.google.com/appengine/docs/java/urlfetch/

  The Python gdata libs have been modified to use URLFetch on App
Engine, I suspect the Java libs have as well.


Robert






2010/12/20 José Miguel Bataller <[email protected]>:
> Hi all,
>
> My situation is the following, I am able to run restful web services
> using the wink library for Java in the google appengine without any
> problem and  I am having problems when I try to go one step further,
> trying to consume remote restful web services with JSON responses from
> inside my restful web services.
>
> Is it possible to use a REST web service client to connect to 3rd
> party apps in google appengine?
>
> I have seen in the official page of Google: "WillItPlayInJava" that is
> not possible (http://code.google.com/p/googleappengine/wiki/
> WillItPlayInJava).
>
> However, in that page, it says that the google appengine supports the
> Google Data client library.  I haven't tried this library, has anybody
> tried and can confirm that it works?
>
> How is possible that the google data client library is compatible with
> the appengine, which means that the appengine is able to establish
> http connections with remote servers and a restful web service client
> does not work when it is exactly the same?
>
> Thanks.
>
>
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