Setting 'content-type' header properly with boundary about feathers-rest HOT 3 CLOSED

You can set headers by adding a headers property in params. In you case calling

client.service('upload').create(data, {
  headers: {
    'content-type': 'multipart/form-data'
  }
});

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I missed this in the docs, earlier, but looks like it's in place on this page: https://docs.feathersjs.com/api/rest.html#client

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I might have said hooks, but whether you do it in the create call or a before hook is the same.
I don't know how I missed this earlier when I was looking for prior issues, but @ekryski puts it well. #102 (comment)
The guide on file uploading works well because it uses a native form element, IIRC.

In superagent, you can either do .set('enctype', 'multipart/form-data') or construct a FormData (which the library itself does.) ladjs/superagent#746 Nevertheless there is a way to do it in superagent, so I guess I will specifically opt out of the upload service create call in favor of doing a direct request like that.

https://www.w3.org/TR/html401/interact/forms.html#h-17.13.4 also defines behavior of the multipart/form-data content type. User agent being the browser, when using a native form element with enctype='multipart/form-data', it is the browser that does the work of constructing the payload and updating the content-type header with a boundary. This is also what Postman does, and superagent deals with this by simulating using FormData.

I do think this can be closed because there is a separate open issue regarding this already. Will update this with a relevant solution if I come up with one, though.

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