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(..)'.
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.
Thanks,
Andre
On 10/31/2011 11:44 AM, Steven Dolg wrote:
Am 30.10.2011 18:35, schrieb Andre Juffer:
Hi,
for processing a multipart/form-data request holding image data, I
intend to use the commons imageupload [1]. In order to do so, I need
to get access to the javax.servlet.http.HttpServletRequest object
inside a REST resource. The @Context annotation injects information
about the request, see e.g. [2] and also [3], but the request object
should implement the javax.ws.rs.core.Request interface (I think).
How can I get to the HttpServletRequest inside a REST resource. Is
there a way to convert Request to
javax.servlet.http.HttpServletRequest? According to [4],"When
deploying a JAX-RS application using servlet then ServletConfig,
ServletContext, HttpServletRequest and HttpServletResponse are
available using @Context." But how?
Right now, I assume
@POST
public Response uploadImage(@Context HttpServletRequest request) {
.....
}
but I do not believe this is actually correct.
The actual type is com.sun.jersey.spi.container.ContainerRequest
(implements Request), according to request.getClass().getName().
There is nothing in the request itself, while I see with Firebug that
the image file is sent to the server in the proper way.
Hi André,
the code fragment you posted appears to be correct and conform with
Jersey - the JAX-RS implementation used by Cocoon 3.
If you receive a value in the parameter request, then it will be of
type HttpServletRequest. The JVM won't allow anything else.
Of course you receive an actual implementation, since
HttpServletRequest is only an interface.
So the question is:
What do you want to do with the request and why do you believe it is
not working correctly?
Cheers,
Steven
Thanks,
André
[1] http://commons.apache.org/fileupload/index.html
[2] http://cocoon.apache.org/3.0/reference/html/webapps.html
[3]
http://jsr311.java.net/nonav/releases/1.1/javax/ws/rs/core/Context.html
[4] http://jersey.java.net/nonav/documentation/latest/jax-rs.html#d4e524
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Andre H. Juffer | Phone: +358-8-553 1161
Biocenter Oulu and | Fax: +358-8-553-1141
Department of Biochemistry | Email: [email protected]
University of Oulu, Finland | WWW: www.biochem.oulu.fi/Biocomputing/
StrucBioCat | WWW: www.strucbiocat.oulu.fi
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