I can't add header to specific multipart in golang

In this article, php editor Xinyi will introduce you to the solution on how to add specific multi-part headers in golang. Headers are key components in HTTP requests and responses, used to convey various metadata information. However, sometimes we may encounter an issue that specific multipart headers cannot be added to the request in golang. In what follows, we’ll provide a simple and effective solution to help you overcome this problem. let's start!

Question content

The api I use requires the content-type of the multipart form to be content-type: audio/wav but if you add a file part, _ := writer.createformfile("audio_file", "test2.wav") It makes the content type application/octet-stream

I have tried before: part.header.set("content-type", "audio/wav") But the header is not defined.

This is the curl request data minus the valid binary:

content-disposition: form-data; name="audio_file"; filename="test2.wav"
content-type: audio/wav

Here is my request minus the rejected binary data:

Content-Disposition: form-data; name="audio_file"; filename="test2.wav"
Content-Type: application/octet-stream

Solution

Call createpart directly instead of the createformfile convenience method. Set the content type in the header used to create the widget.

h := make(textproto.MIMEHeader)
h.Set("Content-Disposition",
    fmt.Sprintf(`form-data; name="%s"; filename="%s"`, "audio_file", "test2.wav"))
h.Set("Content-Type", "audio/wav")
part, err := writer.CreatePart(h)

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