grokify/mogo

package multipartutil

import (
    "net/http"
    "net/url"

    "github.com/grokify/mogo/net/http/httputilmore"
)

// FileInfo represents a file for uploading.
type FileInfo struct {
    MIMEPartName string
    Filepath     string
}

// NewRequest returns a `*http.Request` for making a
// request using multipart/form-data. It supports simple strings
// and files. For more complex field requirements such as JSON
// body parts that require Content-Type headers and Base64
// encoding, use MultipartBuilder directly.
func NewRequest(method, url string, params url.Values, files []FileInfo) (*http.Request, error) {
    mb := NewMultipartBuilder()
    err := mb.WriteURLValues(params)
    if err != nil {
        return nil, err
    }
    for _, file := range files {
        err := mb.WriteFilePathPlus(file.MIMEPartName, file.Filepath, true)
        if err != nil {
            return nil, err
        }
    }
    err = mb.Close()
    if err != nil {
        return nil, err
    }

    req, err := http.NewRequest(method, url, mb.Buffer)
    if err != nil {
        return nil, err
    }
    req.Header.Set(httputilmore.HeaderContentType, mb.ContentType())
    return req, nil
}