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From Steven Dolg <>
Subject Re: [cocoon3] @Context Request request
Date Mon, 31 Oct 2011 10:40:38 GMT
Am 31.10.2011 11:29, schrieb Andre Juffer:
> Steven,
> thanks for the reply.
> The purpose of the request is to upload an image file. With commons 
> fileupload this is straightforward, but it requires direct access to 
> HttpServletRequest. I did understand that HttpServletRequest is an 
> interface of course.
> With commons fileupload, one would do something like
> FileItemFactory factory = new DiskFileItemFactory();
> ServletFileUpload upload = new ServletFileUpload(factory);
> List<FileItem> items = upload.parseRequest(request);
> Here, 'request' must be (an implementation of) HttpServletRequest. One 
> of 'items' would contain the image.
> If I use
> public Response uploadImage(@Context Request request)
> the type of 'request' is 
> com.sun.jersey.spi.container.ContainerRequest, which will not work 
> with 'upload.parseRequest(request)' above. The ContainerRequest does 
> not implement HttpServletRequest. Following your email, one should see 
> for 'request' a HttpServletRequest? I would agree with this, given the 
> statement at the jersey website "When deploying a JAX-RS application 
> using servlet then ServletConfig, ServletContext, HttpServletRequest 
> and HttpServletResponse are available using @Context.".
> With
> public Response uploadImage(@Context HttpServletRequest request)
> the type of request is some proxy (this is the name of an implementing 
> class, something like $Proxy38).
> In any case, i -did- use public Response uploadImage(@Context 
> HttpServletRequest request) and noticed that the request is empty 
> (that is, the List<FileItem>  above is empty). That is, no image file 
> is available, although it was sent correctly (checked with Firebug).
> So, my conclusion was that something is not working correctly and 
> that's why I was wondering about the type of request. The POST request 
> on the client was something like
> http://localhost:8888/eap/rest/image
> with jetty as the servlet engine. I cannot be sure what happens in 
> between sending the request and the handling by 
> 'ImageResource.uploadImage(..)'.

I'm sorry, but I'm not familiar with commons-fileupload and not very 
familiar with Jersey.
All I can say is that your problem is (probably) not within Cocoon.

Using some rather uncommon Servlet-Container is a good source for 
obscure problems, but Jetty is very common and should work fine.

At this time I can only advise you to check the documentation for 
commons-fileupload an maybe try to get it working with a very simple 
servlet without any Cocoon, Jersey and any other framework at all.

> One thing, though (just occurred to me while preparing this email): I 
> did use
> List<FileItem> items = upload.parseRequest(request);
> which possibly should be
> List items = upload.parseRequest(request);
> (so no generics). The version of fileupload I use is 1.2.1 (if I 
> correctly remember), but I will look into this this evening.

Generics cannot have an effect on this.
At worst you would receive a ClassCastException at runtime, but it 
cannot alter the result in any way.

> Thanks,
> Andre

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