hi, ok I will try to work with the patched converter although I must say that this should really be part of Restlet for cases such as JSON submitting via Web Forms.
In order to move forward - Can you elaborate a bit more about how exactly should I register the patched Converter? I reviewed the META-INF file of the xstream extension per you instruction - unfortunately I did not understand from its content what should I do. Can you give me more detailed instructions on how to integrate it into my project? Thanks, Chen. On Tue, Apr 13, 2010 at 15:58, Thierry Boileau <[email protected]>wrote: > Hi Chen, > > yes, there is a difference between AJAX requests and classic "web form" > POST requests. > AJAX allows you to send HTTP requests such as PUT (It may depends on the > browser, though) with correct content-type, as a classic client. > Here are the request/response headers sent by Firefox 3.6 when clicking on > the "update" button on the sample app [1] illustrating the "first system" > sample app [2]: > > PUT /contacts/123 HTTP/1.1 > > Host: restlet-example-serialization.appspot.com > > User-Agent: Restlet-Framework/2.0snapshot > > Accept: application/x-java-serialized-object+gwt > > Accept-Language: fr,en;q=0.5 > > Accept-Encoding: gzip,deflate > > Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 > > Keep-Alive: 115 > > Connection: keep-alive > > Content-Type: application/x-java-serialized-object+gwt; charset=UTF-8 > > Referer: > http://restlet-example-serialization.appspot.com/org_restlet_example_gae_serialization/747F0EF6A10597E5888F82DD3E9494F8.cache.html > > Content-Length: 242 > > > HTTP/1.1 200 OK > > Vary: Accept-Charset, Accept-Encoding, Accept-Language, Accept > > Accept-Ranges: bytes > > Date: Tue, 13 Apr 2010 12:22:37 GMT > > Content-Type: text/html > > Server: Google Frontend > > Content-Length: 0 > > > > >It is not clear to me why I need a custom converter? > Well, it's not clear to me too. :) > I think I've overinterpreted your questions. > If I understand well, you send a POST request (I'm not clear if it is via > AJAX or a Web form). For sure it won't work since the resource accepts only > GET and PUT. > In the case you send such POST requests because of Web form limitations, > you can workaround this by leveraging the TunnelService [3]: > - make sure application#tunnelService#methodTunnel is turned on. > - update the target URL, by adding a "method=put" (for example) parameter > in the query. The Tunnel filter is in charge to update the method of the > request. > > Now, let's have a look at the body of your request. You design the resource > as follow: > @Put("json") > public void insertItem(Item myItem){ > //insert item into DataStore > } > > By doing so, you rely on registered converters in order to convert a JSON > representation (the source representation) into an Item instance (the target > object). If the source representation has not the desired media type, it > will fail and return a 405 status. If any converter is unable to generate > the conversion to the target type, it will also fail. > Having said that, the default converter supports such methods: > @Put > public void insertItem(Form myItemAsAForm){ > //insert item into DataStore > } > > The Xstream (patched) converter, or Jackson converter should be able to > support such annotated method as soon as the source representation has a > "json" media type and its content is compatible with the framework > expectations: > @Put("json") > public void insertItem(Item myItem){ > //insert item into DataStore > } > > I hope this will help you a little bit. Feel free, of course, to ask for > more details. > > >btw - GET operations are very limited since you cannot upload large JSON > >objects because of URL length limitations (especially on mobile devices) > Well, I'm not sure to fully understand. Representations are not to be sent > via the URL, in query parameters. That's a very bad idea. > > Best regards, > Thierry Boileau > > [1] > http://restlet-example-serialization.appspot.com/Org_restlet_example_gae_serialization.html > [2] http://wiki.restlet.org/docs_2.0/13-restlet/303-restlet.html > [3] http://wiki.restlet.org/docs_2.0/13-restlet/207-restlet.html > > ------------------------------------------------------ > > http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447&dsMessageId=2580786 > ------------------------------------------------------ http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447&dsMessageId=2580806
