upload file

upload_file.go

package main

import (
	"bytes"
	"fmt"
	"io"
	"io/ioutil"
	"mime/multipart"
	"net/http"
	"os"
)

func main() {
	postUrl := "https://img.zku.me/upload.php?key=2bA0IPSeXgQfrZDsyV4BtY1X74ejhZWv"
	// postUrl = "http://localhost:8080/api/test"
	filePath := "/Users/cai/Desktop/test.png"
	request, _ := newfileUploadRequest(postUrl, map[string]string{"key": "2bA0IPSeXgQfrZDsyV4BtY1X74ejhZWv"}, "file", filePath)

	fmt.Println(request.Header)

	fmt.Println(request.Body)

	response, _ := http.DefaultClient.Do(request)

	msg, _ := ioutil.ReadAll(response.Body)

	fmt.Printf("结果 %s\n", msg)
}

func newfileUploadRequest(uri string, params map[string]string, paramName, path string) (*http.Request, error) {
	file, err := os.Open(path)
	if err != nil {
		return nil, err
	}
	defer file.Close()

	body := &bytes.Buffer{}
	writer := multipart.NewWriter(body)
	part, err := writer.CreateFormFile(paramName, path)
	if err != nil {
		return nil, err
	}
	_, err = io.Copy(part, file)

	for key, val := range params {
		_ = writer.WriteField(key, val)
	}
	err = writer.Close()
	if err != nil {
		return nil, err
	}



	request, err := http.NewRequest("POST", uri, body)
	request.Header.Set("Content-Type", writer.FormDataContentType())
	return request, err
}