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Content-Type for one file in multipart/form-data with HTTPie

I use HTTPie to POST a multipart/form-data request (passing the -f option). It includes a file field (using a @ option). The corresponding part of the multipart request has a pseudo-header Content-Disposition, but does not have a pseudo-header Content-Type.

How is it possible to add such a Content-Type for a specific file?

For completeness, here is what I send now (as shown by -p B):

--xyz
Content-Disposition: form-data; name="file"; filename="file.txt"

Hello, world!
This is the content of the file.

--xyz

but here is what I need to send:

--xyz
Content-Disposition: form-data; name="file"; filename="file.txt"
Content-Type: text/plain

Hello, world!
This is the content of the file.

--xyz

Or to put it another way, like the CURL equivalent option: -F "file=file.txt;type=text/plain".

Solution

  • I have just noticed that the documentation for multipart/form-data now reads like the following (at the end):

    When uploading files, their content type is inferred from the file name. You can manually override the inferred content type:

    $ http -f POST httpbin.org/post name='John Smith' cv@'~/files/data.bin;type=application/pdf'

    I do not know when that happened, but it seems that now:

    1. the "part Content-Type" is inferred automatically
    2. it is possible to override it from the command line option

    So all I was looking for! :-)

    Ref: https://httpie.org/docs#file-upload-forms.