go上传文件到表单，php后台接受_go bodywriter.createformfile-优快云博客

本文链接：https://blog.youkuaiyun.com/oraclechaozi/article/details/127027736

该博客展示了如何使用Go语言客户端发送POST请求，将图片文件作为表单数据上传到PHP后端服务器。Go代码实现了打开本地文件、创建multipart/form-data请求，并设置额外参数。PHP后台接收到文件后，将其保存到指定目录并返回上传成功的响应。

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go文件代码

package main

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

func main() {
	postFormDataWithSingleFile()
}
func postFormDataWithSingleFile() {
	imagePostURL:="http://qilipu.com/api/Go/img"
	client := http.Client{}
	bodyBuf := &bytes.Buffer{}
	bodyWrite := multipart.NewWriter(bodyBuf)
	file, err := os.Open("123.png")
	if err==nil{
		defer file.Close()
	}
	if err != nil {
		log.Println("err0",err)
	}
	// file 为key
	fileWrite, err := bodyWrite.CreateFormFile("file", "img.jpg")
	_, err = io.Copy(fileWrite, file)
	if err != nil {
		log.Println("err1",err)
	}
	_ =bodyWrite.WriteField("date", "2022-09-24")//设置额外的参数
	bodyWrite.Close() //要关闭，会将w.w.boundary刷写到w.writer中
	// 创建请求
	contentType := bodyWrite.FormDataContentType()
	req, err := http.NewRequest(http.MethodPost, imagePostURL, bodyBuf)
	if err != nil {
		log.Println("err2",err)
	}
	// 设置头
	req.Header.Set("Content-Type", contentType)
	resp, err := client.Do(req)
	if err != nil {
		log.Println("err3",err)
	}
	defer resp.Body.Close()
	b, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		log.Println("err4",err)
	}
	fmt.Println(string(b))
}

php后台接受代码

 public function img(){
        if($_FILES){
            $ym=date('Ymd');
            $filepath=ROOT_PATH.'public'.DIRECTORY_SEPARATOR.'uploads'.DIRECTORY_SEPARATOR.'go'.DIRECTORY_SEPARATOR.$ym.DIRECTORY_SEPARATOR;
            $file = $_FILES['file'];
            $file_name = $file['name'];
            $tmp_file = $file['tmp_name'];
            $error = $file['error'];
            if($error == 0){
                move_uploaded_file($tmp_file, $filepath.$file_name);
            }
            $img_url=$this->request->scheme().'://'.$_SERVER['HTTP_HOST'].'/uploads/go/'.$ym.'/'.$file_name;
            $this->success('请求成功',['img_url'=>$img_url]);
        }
    }

仅供学习使用