func ToFileForm()

in golang/service/service.go [53:106]
54 lines of code
10 McCabe index (conditional complexity)

func ToFileForm(body map[string]interface{}, boundary *string) io.Reader {
	out := bytes.NewBuffer(nil)
	line := "--" + tea.StringValue(boundary) + "\r\n"
	forms := make(map[string]string)
	files := make(map[string]map[string]interface{})
	for key, value := range body {
		switch value.(type) {
		case *FileField:
			if val, ok := value.(*FileField); ok {
				out := make(map[string]interface{})
				out["filename"] = tea.StringValue(val.Filename)
				out["content-type"] = tea.StringValue(val.ContentType)
				out["content"] = val.Content
				files[key] = out
			}
		case map[string]interface{}:
			if val, ok := value.(map[string]interface{}); ok {
				files[key] = val
			}
		default:
			forms[key] = fmt.Sprintf("%v", value)
		}
	}
	for key, value := range forms {
		if value != "" {
			out.Write([]byte(line))
			out.Write([]byte("Content-Disposition: form-data; name=\"" + key + "\"" + "\r\n\r\n"))
			out.Write([]byte(value + "\r\n"))
		}
	}
	formFiles := make([]*formFile, 0)
	for key, value := range files {
		start := line
		start += "Content-Disposition: form-data; name=\"" + key + "\"; filename=\"" + value["filename"].(string) + "\"\r\n"
		start += "Content-Type: " + value["content-type"].(string) + "\r\n\r\n"
		formFile := &formFile{
			File:       value["content"].(io.Reader),
			start:      true,
			StartField: strings.NewReader(start),
		}
		if len(files) == len(formFiles)+1 {
			end := "\r\n\r\n--" + tea.StringValue(boundary) + "--\r\n"
			formFile.EndField = strings.NewReader(end)
		} else {
			formFile.EndField = strings.NewReader("\r\n\r\n")
		}
		formFiles = append(formFiles, formFile)
	}
	return &FileFormReader{
		formFiles: formFiles,
		formField: out,
		ifField:   true,
	}
}