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Asked: 2026-06-10T11:03:57+00:00

Is Content-Type header optional for multipart/form-data requests? I mean each Content-Disposition section. Please refer

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Is Content-Type header optional for multipart/form-data requests? I mean each Content-Disposition section. Please refer to RFCs in your answer.

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  1. Editorial Team

    RFC 2388, from 3. Definition of multipart/form-data:

    As with all multipart MIME types, each part has an optional
    “Content-Type”, which defaults to text/plain. If the contents of a
    file are returned via filling out a form, then the file input is
    identified as the appropriate media type, if known, or
    “application/octet-stream”. If multiple files are to be returned as
    the result of a single form entry, they should be represented as a
    “multipart/mixed” part embedded within the “multipart/form-data”.

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