Hi;
I need to be able to set (at least) a different Content-Disposition header for each File part of a Multipart request. The UI REST client only allows setting the Content-Type header for each File part.
Each File part should be allowed to be sent with it's own headers, not just Content-Type.
Do you have a workaround I could use right now ?

Content-Type: multipart/mixed; boundary=AaB03x
--AaB03x
Content-Type: application/xml
Content-Disposition: metadata; filename="1.xml"
... contents of file1.xml ...
--AaB03x
Content-Type: application/octet-stream
Content-Disposition: content; filename="1"
... contents of file1 ...

At present we do not support :( I will take this as a requirement.

The last two commits add support for multipart/mixed Content-type. I saw the list of Content-Disposition values here. @igiguere , in this list I don't see the values you mentioned content and metadata.

@subwiz : The values "content" and "metadata" are defined in our code, to take different action based on those values. That's why the request sender needs control over the value of Content-Disposition.

Thanks for the input. Will work on this when I have available time.

Had a look at this. there seems to be more than just multipart/form-data and multipart/mixed Content-types. A tool like RESTClient must implement flexibility, and the current UI I designed may not be sufficient.

This issue has three requests:

1. Support for multipart/mixed Content-Type. This is implemented in for the top-http header now.
2. Support for multipart/mixed Content-Type for sub-parts. This may not be supported by the tool in immediate future.
3. Changing the Content-Disposition header. The backend API I am currently using is not supporting this. I will raise this as a request in that project and wait.

http://stackoverflow.com/questions/29211730/multipart-requests-in-httpclient-4-4-custom-content-disposition-header-for-each

Oleg has given an answer in the above SO question:

FormBodyPart bodyPart = FormBodyPartBuilder.create()
        .setName("blah")
        .addField("Content-Disposition", "blah")
        .setBody(new StringBody("blah", ContentType.TEXT_PLAIN))
        .build();
HttpEntity entity = MultipartEntityBuilder.create()
        .addPart(bodyPart)
        .build();
entity.writeTo(System.out);

Need to develop the UI and implement this.

Self-note, multipart-part content with fields:

<file>
  <content>/path/to/file</content>
  <fields>
    <field>
      <name>name</name>
      <value>value</value>
    </field>
  </fields>
</file>