doxzrb8721 2019-08-21 10:16
浏览 385
已采纳

如何在Go中发送带有图片和某些参数的http发布请求?

I am trying to make an http post request with image and parameters in the form-data, but when I am adding image, my parameters are lost.

testProduct := &Product{
    Name: "TestProductName",
    ImageExtension: "png",
}

var b bytes.Buffer
multipartWriter := multipart.NewWriter(&b)
multipartWriter.CreateFormFile("image", "../test.png")
multipartWriter.Close()

form = url.Values{}
form.Add("name", testProduct.Name)
form.Add("image_extension", testProduct.ImageExtension)

req, _ := http.NewRequest(http.MethodPost, "api/v1/admin/products/", &b)

req.PostForm = form
req.Header.Add("Authorization", "Bearer "+loginResponse.Token)
req.Header.Set("Content-Type", multipartWriter.FormDataContentType())

recorder := httptest.NewRecorder()
router.ServeHTTP(recorder, req)

But when the request handled the parameters doesn't bind: https://i.imgur.com/JmT4qLh.png

This is the product struct:

type Product struct {
    ID             string `form:"id" json:"id"`
    Name           string `form:"name" json:"name"`
    Price          int64  `form:"price" json:"price"`
    ImageExtension string `form:"image_extension" json:"image_extension"`
}
  • 写回答

1条回答 默认 最新

  • duanlv5084 2019-08-21 11:45
    关注
        testProduct := &Product{
        Name:           "TestProductName",
        ImageExtension: "png",
    }
    
    pr, pw := io.Pipe()
    form := multipart.NewWriter(pw)
    
    go func() {
        defer pw.Close()
    
        err := form.WriteField("name", testProduct.Name)
        if err != nil {
            return
        }
    
        err = form.WriteField("image_extension", testProduct.ImageExtension)
    
        file, err := os.Open("a.png") // path to image file
        if err != nil {
            return
        }
    
        w, err := form.CreateFormFile("image", "sampleImageFileName.png")
        if err != nil {
            return
        }
    
        _, err = io.Copy(w, file)
        if err != nil {
            return
        }
    
        form.Close()
    }()
    
    r, err := http.NewRequest(http.MethodPost, "api/v1/admin/products/", pr)
    if err != nil {
        return
    }
    r.Header.Set("Content-Type", form.FormDataContentType())
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

报告相同问题?

悬赏问题

  • ¥60 pb数据库修改或者求完整pb库存系统,需为pb自带数据库
  • ¥15 spss统计中二分类变量和有序变量的相关性分析可以用kendall相关分析吗?
  • ¥15 拟通过pc下指令到安卓系统,如果追求响应速度,尽可能无延迟,是不是用安卓模拟器会优于实体的安卓手机?如果是,可以快多少毫秒?
  • ¥20 神经网络Sequential name=sequential, built=False
  • ¥16 Qphython 用xlrd读取excel报错
  • ¥15 单片机学习顺序问题!!
  • ¥15 ikuai客户端多拨vpn,重启总是有个别重拨不上
  • ¥20 关于#anlogic#sdram#的问题,如何解决?(关键词-performance)
  • ¥15 相敏解调 matlab
  • ¥15 求lingo代码和思路