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diff --git a/utils.go b/utils.go
new file mode 100644
index 0000000..f08c174
--- /dev/null
+++ b/utils.go
@@ -0,0 +1,91 @@
+package main
+
+import (
+ "errors"
+ "fmt"
+ "log"
+ "net"
+ "net/http"
+ "net/url"
+)
+
+// GetClientIPHelper gets the client IP using a mixture of techniques.
+// This is how it is with golang at the moment.
+func GetClientIPHelper(req *http.Request) (ipResult string, errResult error) {
+
+ // Try lots of ways :) Order is important.
+ // Try Request Headers (X-Forwarder). Client could be behind a Proxy
+ ip, err := getClientIPByHeaders(req)
+ if err == nil {
+ log.Printf("debug: Found IP using Request Headers sniffing. ip: %v", ip)
+ return ip, nil
+ }
+
+ // Try by Request
+ ip, err = getClientIPByRequestRemoteAddr(req)
+ if err == nil {
+ log.Printf("debug: Found IP using Request sniffing. ip: %v", ip)
+ return ip, nil
+ }
+
+ // Try Request Header ("Origin")
+ url, err := url.Parse(req.Header.Get("Origin"))
+ if err == nil {
+ host := url.Host
+ ip, _, err := net.SplitHostPort(host)
+ if err == nil {
+ log.Printf("debug: Found IP using Header (Origin) sniffing. ip: %v", ip)
+ return ip, nil
+ }
+ }
+
+ err = errors.New("error: Could not find clients IP address")
+ return "", err
+}
+
+// getClientIPByRequest tries to get directly from the Request.
+// https://blog.golang.org/context/userip/userip.go
+func getClientIPByRequestRemoteAddr(req *http.Request) (ip string, err error) {
+
+ // Try via request
+ ip, port, err := net.SplitHostPort(req.RemoteAddr)
+ if err != nil {
+ log.Printf("debug: Getting req.RemoteAddr %v", err)
+ return "", err
+ } else {
+ log.Printf("debug: With req.RemoteAddr found IP:%v; Port: %v", ip, port)
+ }
+
+ userIP := net.ParseIP(ip)
+ if userIP == nil {
+ message := fmt.Sprintf("debug: Parsing IP from Request.RemoteAddr got nothing.")
+ log.Printf(message)
+ return "", fmt.Errorf(message)
+
+ }
+ log.Printf("debug: Found IP: %v", userIP)
+ return userIP.String(), nil
+
+}
+
+// getClientIPByHeaders tries to get directly from the Request Headers.
+// This is only way when the client is behind a Proxy.
+func getClientIPByHeaders(req *http.Request) (ip string, err error) {
+
+ // Client could be behid a Proxy, so Try Request Headers (X-Forwarder)
+ ipSlice := []string{}
+
+ ipSlice = append(ipSlice, req.Header.Get("X-Forwarded-For"))
+ ipSlice = append(ipSlice, req.Header.Get("x-forwarded-for"))
+ ipSlice = append(ipSlice, req.Header.Get("X-FORWARDED-FOR"))
+
+ for _, v := range ipSlice {
+ log.Printf("debug: client request header check gives ip: %v", v)
+ if v != "" {
+ return v, nil
+ }
+ }
+ err = errors.New("error: Could not find clients IP address from the Request Headers")
+ return "", err
+
+}