func ProxyTest() {
    proxyAddr := "http://your IP:8080/"

    httpUrl := "http://your target url"

    poststr := "your  post values"

    proxy, err := url.Parse(proxyAddr)
    if err != nil {
        log.Fatal(err)
    }

    netTransport := &http.Transport{
        Proxy:                 http.ProxyURL(proxy),
        MaxIdleConnsPerHost:   10,
        ResponseHeaderTimeout: time.Second * time.Duration(5),
    }

    httpClient := http.Client{
        Timeout:   time.Second * 10,
        Transport: netTransport,
    }

    res, err := http.NewRequest("POST", httpUrl, strings.NewReader(poststr))
    if err != nil {
        log.Println(err)
        return
    }

    res.Header.Add("content-type", "application/x-ndjson")

    resp, err := httpClient.Do(res)

    defer resp.Body.Close()
    if resp.StatusCode != http.StatusOK {
        log.Println(err)
    }

    c, _ := ioutil.ReadAll(resp.Body)

    fmt.Println(string(c))
}

参考

https://i6448038.github.io/2017/11/11/httpAndGolang/

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