Go http request by local port

httpclient.go

// Create by Yale 2019/3/29 9:43
package httpclient

import (
	"net"
	"net/http"
	"time"
)

func GetLocalAddrHttpClient(localIp net.IP, localPort int) *http.Client {
	addrValue := net.TCPAddr{IP: localIp, Port: localPort}
	client := http.Client{}
	client.Transport = &http.Transport{
		Proxy: http.ProxyFromEnvironment,
		DialContext: (&net.Dialer{
			Timeout:   30 * time.Second,
			KeepAlive: 30 * time.Second,
			LocalAddr: &addrValue,
			DualStack: true,
		}).DialContext,
		MaxIdleConns:          100,
		IdleConnTimeout:       90 * time.Second,
		TLSHandshakeTimeout:   10 * time.Second,
		ExpectContinueTimeout: 1 * time.Second,
	}
	return &client
}

httpclient_test.go

// Create by Yale 2019/3/29 9:50
package httpclient

import (
	"fmt"
	"io/ioutil"
	"net"
	"testing"
)

func TestGetLocalAddrHttpClient(t *testing.T) {

	client := GetLocalAddrHttpClient(net.ParseIP("172.16.1.251"), 45678)
	r, err := client.Get("https://google.com")
	if err != nil {
		panic(err)
	}
	if r.StatusCode == 200 {
		b, err := ioutil.ReadAll(r.Body)
		if err != nil {
			panic(err)
		}
		fmt.Println(string(b))
	}

}

Because use one local port to request data, the second request will faild , so a way to solve this problem is to use one request use one process.