[Solved] Combining string and []byte for payload

by


Here’s an example using multipart request. I modified this from a piece of code I have that deals with JSON docs, so there may be some mistakes in it, but it should give you the idea:

        body := bytes.Buffer{}
        writer := multipart.NewWriter(&body)
        hdr := textproto.MIMEHeader{}
        hdr.Set("Content-Type", "text/plain")
        part, _ := writer.CreatePart(hdr)
        part.Write(data1)

        hdr = textproto.MIMEHeader{}
        hdr.Set("Content-Type", <image type>)
        part, _ = writer.CreatePart(hdr)
        part.Write(imageData)

        ... // Add more parts if you need to
        writer.Close()

        request, _ := http.NewRequest(http.MethodPost, url, &body)
        request.Header.Set("Content-Type", fmt.Sprintf("multipart/mixed;boundary=%s", writer.Boundary()))

        hcli := http.Client{}
        rsp, err := hcli.Do(request)

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solved Combining string and []byte for payload