Signing oAuth with apache HttpRequest for a multipart request - oauth

Question

enter code hereI need to send a multipart request to a rest api signed with oAuth
in my pom I'm using
<dependency>
<groupId>oauth.signpost</groupId>
<artifactId>signpost-commonshttp4</artifactId>
<version>1.2.1.1</version>
</dependency>
and I'm using this code to add a multipart form
consumer = new DefaultOAuthConsumer(CONSUMER_KEY, CONSUMER_SECRET);
consumer = new DefaultOAuthConsumer(CONSUMER_KEY, CONSUMER_SECRET);
consumer.setTokenWithSecret("XXXX", "YYYY");
System.out.println("Fetching request token from "
+ REQUEST_TOKEN_ENDPOINT);
PostMethod filePost = new PostMethod("http://..../");
Part[] parts = {
new FilePart("metadata", temp, "application/xml", "UTF8"),
new FilePart("attachment", imageFile, "image/jpeg", null),
};
filePost.setRequestEntity(new MultipartRequestEntity(parts, filePost.getParams()));
HttpClient client = new HttpClient();
int status = client.executeMethod(filePost);
the problem is that to do the consumer.sign(request), to sign the request with oAuth, I need to have an HttpRequest...
so my question is, what can I do to send a multipart POST request with something similar like this using an HttpRequest from apache.
Thanks

Answer 1

Well I reply myself since I solved my problem. I paste here how to do it, hope it may be useful for some body
HttpPost uploadBackgroundPost = new HttpPost ("http://.../");
consumer.sign(uploadBackgroundPost);
MultipartEntity entity = new MultipartEntity (HttpMultipartMode.STRICT);
FileBody tempBody = new FileBody(temp, "application/xml");
FileBody imageBody = new FileBody(imageFile, "image/jpeg");
entity.addPart("metadata", tempBody);
entity.addPart("attachment", imageBody);
uploadBackgroundPost.setEntity(entity);
DefaultHttpClient httpClient = new DefaultHttpClient();
System.out.println(httpClient.execute(uploadBackgroundPost, new BasicResponseHandler()));