You can achieve the same result a different way, but with two network calls. The first, a regular RPC call that uploads the data and returns some unique ID. The second is an HTTP call that goes to your non-GWT servlet and passes in the ID from the first call as a parameter, and the file is returned for the browser to handle as normal.
HTH Paul Andrey wrote: > Jason, > > this is exactly what I was thinking of. My question is how to do this > part: "have a field that contained the serialized rpc style data"? How > can I rpc-serialize it? > BTW I want to download the file not to upload it. So I will not need > to decode on client, only encode on client and decode on server > > On 6 ноя, 20:16, Jason Essington <[email protected]> > wrote: > >> Actually, the process would be to construct a form post (not a XHR) >> since that is the only way in Javascript/html to upload a file. you >> could have a field that contained the serialized rpc style data ... >> >> then on the server break out the fields ... handle the files and >> deserialize the other bits. then serialize a response and return it. >> >> on the client, the target iframe would have to handle the returned >> text as RPC data and deserialize it. >> >> I don't think that any of this is built into GWT at the moment, but it >> would be possible to create it. >> >> I have created form posts with RPC responses in the past, so it is a >> short hop to add the rpc style request parameters. >> >> -jason >> >> On Nov 6, 2009, at 6:48 AM, Sripathi Krishnan wrote: >> >> >>> Can't do it via GWT RPC. As you said, you can bypass things on the >>> server, but GWT doesn't have any client side hooks to get raw bytes. >>> >>> In fact, I am not sure if you can do that using a XmlHttpRequest. >>> How will the user save the file, if the data is available as a >>> javascript variable? >>> >>> There is an older discussion on this group - someone wanted to >>> download an image from the servlet but pass in parameters using GWTs >>> RPC request. The conclusion was similar - it can't be done. >>> >>> --Sri >>> >>> 2009/11/6 Andrey <[email protected]> >>> >>> I'm using GWT 1.7 >>> >>> On 6 ноя, 14:15, Andrey <[email protected]> wrote: >>> >>>> Hi, >>>> >>>> I want to create a servlet that is downloading some file to client. >>>> So, I cannot use RPC services for that. Servlet will take a lot of >>>> data from client, so request should be POST. I want to use built-in >>>> RPC serialization mechanizm to encode my parameters. On server, I >>>> >>> can >>> >>>> use com.google.gwt.user.server.rpc.RPC class to decode the request >>>> >>> and >>> >>>> get the parameters. But how can I encode them on client? I've been >>>> unable to fetch SerializationStreamWriter instances or something. >>>> >>>> In short, I want RPC-request without RPC-response (servlet will be >>>> writing a file in output stream instead). >>>> >>>> Hope, I've been clear enough.. >>>> >>>> Thanks in advance, >>>> Andrey >>>> --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en -~----------~----~----~----~------~----~------~--~---
