我想用golang post请求,上传图片,但是不想传filepath,只想传[] byte 下面的文章不是我需要的,因为都用到了os.Open golang POST data using the Content-Type multipart/form-data
func Upload(url, file string) (err error) {
// Prepare a form that you will submit to that URL.
var b bytes.Buffer
w := multipart.NewWriter(&b)
// Add your image file
f, err := os.Open(file)
if err != nil {
return
}
defer f.Close()
fw, err := w.CreateFormFile("image", file)
if err != nil {
return
}
if _, err = io.Copy(fw, f); err != nil {
return
}
// Add the other fields
if fw, err = w.CreateFormField("key"); err != nil {
return
}
if _, err = fw.Write([]byte("KEY")); err != nil {
return
}
// Don't forget to close the multipart writer.
// If you don't close it, your request will be missing the terminating boundary.
w.Close()
// Now that you have a form, you can submit it to your handler.
req, err := http.NewRequest("POST", url, &b)
if err != nil {
return
}
// Don't forget to set the content type, this will contain the boundary.
req.Header.Set("Content-Type", w.FormDataContentType())
// Submit the request
client := &http.Client{}
res, err := client.Do(req)
if err != nil {
return
}
// Check the response
if res.StatusCode != http.StatusOK {
err = fmt.Errorf("bad status: %s", res.Status)
}
return
}
最佳答案
自从你使用
if _, err = io.Copy(fw, f); err != nil {
return
}
您也可以将代码编辑为:
- 添加新导入:
"bytes"
- 将方法签名更改为
func Upload(url string, file []byte) (err error)
- 使用
io.Copy(fw, bytes.NewReader(f))
关于http - 如何在 go 中将文件作为 []byte 上传?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/44297376/