c3b

After spending quite a while trying to figure this out I’m posting it as a reminder in future

POST http://example.com/upload.php HTTP/1.1
User-Agent: Photo Uploader (foobar/1.0.0)
Content-Type: multipart/form-data; boundary=AaB03x
Content-Length: xxxx 

--AaB03x
Content-Disposition: form-data; name="foo"
Content-Type: text/plain; charset=utf-8 

12345
--AaB03x
Content-Disposition: form-data; name="Filename"
Content-Type: text/plain; charset=utf-8 

image1.jpg
--AaB03x
Content-Disposition: form-data; name="MimeType"
Content-Type: text/plain; charset=utf-8 

image/jpeg
--AaB03x
Content-Disposition: form-data; name="ImageData";
filename="image1.jpg"
Content-Type: image/jpeg
Content-Transfer-Encoding: binary 


--AaB03x--