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package gorequest
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import (
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"errors"
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"math/rand"
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"net"
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"net/http"
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"runtime"
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"strings"
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"time"
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)
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// ClientIp 尽最大努力实现获取客户端 IP 的算法。
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// 解析 X-Real-IP 和 X-Forwarded-For 以便于反向代理（nginx 或 haproxy）可以正常工作。
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func ClientIp(r *http.Request) string {
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// xForwardedFor
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xForwardedFor := r.Header.Get("X-Forwarded-For")
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ip := strings.TrimSpace(strings.Split(xForwardedFor, ",")[0])
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if ip != "" {
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return ip
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}
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// xRealIp
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ip = strings.TrimSpace(r.Header.Get("X-Real-Ip"))
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if ip != "" {
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return ip
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}
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// HTTPCLIENTIP
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HTTPCLIENTIP := r.Header.Get("HTTP_CLIENT_IP")
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ip = strings.TrimSpace(strings.Split(HTTPCLIENTIP, ",")[0])
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if ip != "" {
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return ip
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}
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// HTTPXFORWARDEDFOR
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HTTPXFORWARDEDFOR := r.Header.Get("HTTP_X_FORWARDED_FOR")
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ip = strings.TrimSpace(strings.Split(HTTPXFORWARDEDFOR, ",")[0])
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if ip != "" {
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return ip
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}
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// system
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if ip, _, err := net.SplitHostPort(strings.TrimSpace(r.RemoteAddr)); err == nil {
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return ip
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}
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return ""
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}
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// GetRandomUserAgent 获取用户UA
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func GetRandomUserAgent() string {
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r := rand.New(rand.NewSource(time.Now().UnixNano()))
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switch runtime.GOOS {
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case "linux":
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return userAgentListLinux[r.Intn(len(userAgentListLinux))]
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case "windows":
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return userAgentListWindows[r.Intn(len(userAgentListWindows))]
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default:
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return userAgentListMac[r.Intn(len(userAgentListMac))]
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}
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}
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var userAgentListWindows = []string{
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"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36", // Chrome 2022-02-14
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"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:83.0) Gecko/20100101 Firefox/83.0", // Firefox 2022-02-14
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"Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; rv:11.0) like Gecko", // IE 2022-02-14
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}
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var userAgentListLinux = []string{
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"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.80 Safari/537.36 HeyTapBrowser/40.7.35.1", // Chrome 2022-02-14
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"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Safari/537.36 OnePlusBrowser/30.5.0.8", // Chrome 2022-02-14
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"Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9a1) Gecko/20060814 Firefox/51.0", // Firefox 2022-02-14
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}
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var userAgentListMac = []string{
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"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.4 Safari/605.1.15", // Safari 2022-02-14
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"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.82 Safari/537.36 Edg/98.0.1108.51", // Edge 2022-02-14
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"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.80 Safari/537.36", // Chrome 2022-02-14
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"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:97.0) Gecko/20100101 Firefox/97.0", // Firefox 2022-02-14
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}
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func ExternalIp() (string, error) {
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faces, err := net.Interfaces()
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if err != nil {
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return "", err
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}
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for _, iface := range faces {
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if iface.Flags&net.FlagUp == 0 {
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continue // interface down
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}
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if iface.Flags&net.FlagLoopback != 0 {
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continue // loopback interface
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}
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adders, err := iface.Addrs()
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if err != nil {
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return "", err
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}
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for _, addr := range adders {
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var ip net.IP
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switch v := addr.(type) {
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case *net.IPNet:
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ip = v.IP
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case *net.IPAddr:
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ip = v.IP
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}
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if ip == nil || ip.IsLoopback() {
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continue
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}
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ip = ip.To4()
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if ip == nil {
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continue // not an ipv4 address
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}
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return ip.String(), nil
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}
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}
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return "", errors.New("are you connected to the network")
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}
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