On Tue, Apr 21, 2009 at 04:09:13PM +0100, Richard Jones wrote:
> Hi Folks,
>
> Apologies if this is a newbie question; I'm a long time user of
> httpclient for basic purposes, but am being stumped this week by a more
> difficult requirement, and wonder if anyone can help.
>
> I need to assemble a multi-part request, consisting of some normal http
> headers, an xml document in the first mime-part, and a binary document
> in the second mime-part. I need to augment the mime-parts with their
> own http headers, also; specifically a Content-Type declaration and a
> Content-Disposition header for each one (which I believe is allowed by
> the MIME standard, from what I can discern from the rfc). My current
> code looks like this:
>
> HttpClient client = new HttpClient();
> PostMethod post = new PostMethod(target);
>
> // set the request headers
> post.setRequestHeader("Slug", slug);
> post.setRequestHeader("X-On-Behalf-Of", user);
>
> // construct the xml and binary file parts
> FilePart xmlPart = new FilePart("atom", new File(xml), "text/xml", null);
> FilePart binaryPart = new FilePart("binary", new File(binary));
>
> // make the multipart request body
> Part[] parts = { xmlPart, binaryPart };
> MultipartRequestEntity re = new MultipartRequestEntity(parts,
> post.getParams());
> post.setRequestEntity(re);
>
> // execute the post
> client.executeMethod(post);
>
> As you can see, I've got the Content-Type header being set properly in
> the FilePart constructor, and this works fine. What I can't figure out
> how to do is add the Content-Disposition header to either of these
> parts. I've poked around the examples, tutorials and mailing lists but
> haven't been able to find any examples of this, but I have seen
> references in the source code to the content disposition in the Part
> object from which FilePart eventually extends.
>
> Any help or pointers to documentation gratefully appreciated.
>
> All the best,
>
> Richard
>
Hi Richard,
The Content-Disposition header will be automatically generated by HttpClient.
If you want a greater control over the process of MIME content generation,
please consider upgrading to HttpClient 4.0 which has much improved MIME
capabilities based on Apache mime4j.
http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/httpmime/src/examples/org/apache/http/examples/entity/mime/ClientMultipartFormPost.java
Hope this helps
Oleg
> --
> Richard Jones
> Head Repository Systems Architect, Symplectic Limited
> e: [email protected]
> t: 0845 026 4755
> t: +44 (0)207 7334036
> w: http://www.symplectic.co.uk/
>
>
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