使用http.NewRequest的POST数据失败 [英] POST data faild using http.NewRequest

问题描述

我正在尝试使用http.NewRequest()将数据从一个golang服务传递到另一服务.为此，我使用了以下代码:

I am trying to pass data from one golang service to another using http.NewRequest(). To do it I used following code:

        httpClient := http.Client{}

        userserviceUrl := "http://user:7071/checkemail"

        form := url.Values{}
        form.Set("uuid", uuid)
        form.Set("email", email)

        b := bytes.NewBufferString(form.Encode())
        req, err := http.NewRequest("POST", userserviceUrl, b)
        if err != nil {
            log.Println(err)
        }

        opentracing.GlobalTracer().Inject(
            validateEmailSpan.Context(),
            opentracing.HTTPHeaders,
            opentracing.HTTPHeadersCarrier(req.Header))

        resp, err := httpClient.Do(req)
        //_, err = http.PostForm("http://user:7071/checkemail", url.Values{"uuid": {uuid}, "email": {email}})

        if err != nil {
            log.Println("Couldnt verify email address user service sends an error : ", err)
        }
        defer resp.Body.Close()

我是从上获得的:Golang:http.NewRequest POST

当我尝试转储从用户服务接收到的数据时:

When I try to dump received data from user service:

    req.ParseForm()
    log.Println("Form values : ", req.Form)

我得到一个空的map[]

在这里，我只是尝试将跟踪范围插入到我的请求中，之前我已经使用过http.PostForm()来传递数据，它工作得很好.但是我不知道将tracing传递给它.

Here I just try to inject tracing span to my request, previously I have used http.PostForm() to pass data, it worked perfectly. But I have no idea to pass tracing to it.

推荐答案

来自parseForm的文档:

[...]当Content-Type不是application/x-www-form-urlencoded时，不读取请求主体，并且r.PostForm初始化为非空值.

[...] when the Content-Type is not application/x-www-form-urlencoded, the request Body is not read, and r.PostForm is initialized to a non-nil, empty value.

PostForm自动设置Content-Type，但是现在您必须自己做:

PostForm sets the Content-Type automatically, but now you have to do it yourself:

req, err := http.NewRequest("POST", userserviceUrl, strings.NewReader(form.Encode()))
// TODO: handle error
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")

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