Multipart POST failing

[dinkom]

I've tried building a multipart POST request as described here: http://visionmedia.github.io/superagent/#multipart-requests

This is my code:

request
  .post(endpoint)
  .field('name', 'foo')
  .field('username', 'bar')
  .set('Authorization', api_key)
  .set('Accept', 'application/json')
  .set('Content-Type', 'multipart/form-data')
  .end(callback)

Server responds with a bad request - parameter name is missing. I know the endpoint works okay because the original is going through a Python app and get a good response, but now I have to reproduce it with superagent.

I also tried replacing .set('Content-Type', 'multipart/form-data') with .type('form') and I tried getting rid of .set('Accept', 'application/json') which gave me a nice 500.

I doubt there's an issue with superagent, but I'm wondering if someone could tell me what am I doing wrong?

[kornelski]

Never set Content-Type with multipart, as it erases the boundary argument that has to be set by the browser.

[dinkom]

@pornel When I try that, I get a 500.

[kornelski]

Try adding .attach('_wahtever_', new Blob([], {type:'blah/blah'})

The reason is we use browser's own FormData to build the form, but it doesn't give any control over the format. Adding a fake file may force it to use multipart format.

[dinkom]

Unfortunately, that didn't do it (tried both with content-type header and without it, getting same responses as without .attach(...)). There must be something missing in my request that is maybe related to the API itself. I'll investigate more today. In case you have other suggestion regarding what I can try with superagent, please share.

[dinkom]

Finally solved this, my clients had an API error they were not aware of... sorry for the trouble.