go 通过http发送图片file内容

package mainimport ( ???????"encoding/json" ???"fmt" ???????"io/ioutil" ???"net/http" ???"net/url" ???"os" ???"bufio" ???"io" ???"mime/multipart" ???"net/smtp")

type addfeature struct { ???subid int ???`json:"subid"` ???file ?[]byte `json:"file"`}func AddTemplateWeb(addr string) { ???// 创建表单文件 ???// CreateFormFile 用来创建表单，第一个参数是字段名，第二个参数是文件名 ???var feat addfeature ???buf := new(bytes.Buffer) ???writer := multipart.NewWriter(buf) ???writer.WriteField("sublib", "1") ???formFile, err := writer.CreateFormFile("file", "5.jpg") ???if err != nil { ???????fmt.Println("Create form file failed: %s\n", err) ???} ???// 从文件读取数据，写入表单 ???srcFile, err := os.Open("/home/wei/1.jpg") ???if err != nil { ???????fmt.Println("%Open source file failed: s\n", err) ???} ???defer srcFile.Close() ???_, err = io.Copy(formFile, srcFile) ???if err != nil { ???????fmt.Println("Write to form file falied: %s\n", err) ???} ???// 发送表单 ???contentType := writer.FormDataContentType() ???writer.Close() // 发送之前必须调用Close()以写入结尾行 ???re, err := http.Post(addr, contentType, buf) ???fmt.Println(re) ???return ???}