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POUploading multiple files and metadata with CXF
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  1. POUploading multiple files and metadata with CXF
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    copied!<p>I need to create a file upload handler as a REST web service with CXF. I've been able to upload a single file with metadata using code like the following:</p> <pre><code>@POST @Path("/uploadImages") @Consumes(MediaType.MULTIPART_FORM_DATA) public Response uploadImage(@Multipart("firstName") String firstName, @Multipart("lastName") String lastName, List&lt;Attachment&gt; attachments) { for (Attachment att : attachments) { if (att.getContentType().getType().equals("image")) { InputStream is = att.getDataHandler().getInputStream(); // read and store image file } } return Response.ok().build(); } </code></pre> <p>Now I need to add support for uploading multiple files in the same request. In this case, instead of an attachment with <code>image/jpeg</code> content type, I get an attachment with <code>multipart/mixed</code> content type, which itself contains the individual <code>image/jpeg</code> attachments that I need.</p> <p>I've seen examples for uploading multiple JSON or JAXB objects with metadata, but I have not been able to get anything to work with binary image data. I have tried using the MultipartBody directly, but it only returns the <code>multipart/mixed</code> attachment, not the <code>image/jpeg</code> attachments embedded within it.</p> <p>Is there a way to recursively parse a <code>multipart/mixed</code> attachment to get the embedded attachments? I can of course get the input stream of the <code>multipart/mixed</code> attachment, and parse out the files myself, but I'm hoping there is a better way.</p> <p><strong>UPDATE</strong></p> <p>This seems kludgey, but the following bit of code is good enough for now. I would love to see a better way though.</p> <pre><code>for (Attachment att : attachments) { LOG.debug("attachment content type: {}", att.getContentType().toString()); if (att.getContentType().getType().equals("multipart")) { String ct = att.getContentType().toString(); Message msg = new MessageImpl(); msg.put(Message.CONTENT_TYPE, ct); msg.setContent(InputStream.class, att.getDataHandler().getInputStream()); AttachmentDeserializer ad = new AttachmentDeserializer(msg, Arrays.asList(ct)); ad.initializeAttachments(); // store the first embedded attachment storeFile(msg.getContent(InputStream.class)); // store remaining embedded attachments for (org.apache.cxf.message.Attachment child : msg.getAttachments()) { storeFile(child.getDataHandler().getInputStream()); } } else if (att.getContentType().getType().equals("image")) { storeFile(att.getDataHandler().getInputStream()); } } </code></pre>
 

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