Here is my Box upload POST to upload a file into a specific folder:
POST /api/2.0/files/content HTTP/1.1
Authorization: Bearer ACCESS_TOKEN
Accept: application/json
User-Agent: SOASoftware/7-HttpCore/4
Transfer-Encoding: chunked
Content-Type: multipart/form-data
Host: upload.box.com
Connection: Keep-Alive
attributes='{"name":"lead.txt", "parent":{"id":"2890481033"}}'&file=C:\SOA\Software\sm70\instances\nd\leads.txt
-----------------------------9051914041544843365972754266
<file-data>
-----------------------------9051914041544843365972754266
but I get this response, that doesn't help me to understand what the problem is:
HTTP/1.1 500
Age: 0
Date: Fri, 02 Jan 2015 09:06:09 GMT
Connection: close
EMPTY MESSAGE
Can anyone tell me what I'm doing wrong in my request to cause the HTTP 500, please?
It looks like your multipart request isn't properly formatted. The easiest way to do this is to use an SDK or find a library that can build a multipart request for you.
If you really want to build the request manually, then here's an example of what an upload request should look like:
POST https://upload.box.com/api/2.0/files/content HTTP/1.1
Host: upload.box.com
Authorization: Bearer ACCESS_TOKEN
Content-Length: 346
Content-Type: multipart/form-data; boundary=------------------------393329c2f2238ab4
--------------------------393329c2f2238ab4
Content-Disposition: form-data; name="attributes"
{"name":"my-file.txt", "parent":{"id":"0"}}
--------------------------393329c2f2238ab4
Content-Disposition: form-data; name="file"; filename="my-file.txt"
Content-Type: application/octet-stream
<file-data>
--------------------------393329c2f2238ab4--
