feat: add support for /g/collect endpoint

Fixes blaumedia#4

README.md

@@ -55,6 +55,7 @@ docker run \
     -e GA_COLLECT_ENDPOINT=/fetch \
     -e GA_COLLECT_REDIRECT_ENDPOINT=/fetch_r \
     -e GA_COLLECT_J_ENDPOINT=/fetch_j \
+    -e GA_COLLECT_G_ENDPOINT=/fetch_g \
     -e PROXY_IP_HEADER=X-Forwarded-For \
     -e PROXY_IP_HEADER_INDEX=0 \
     -e ENABLE_SERVER_SIDE_GA_COOKIES=true \
@@ -86,6 +87,7 @@ docker run \
 |```GA_COLLECT_ENDPOINT```|Set the new name for the /collect endpoint.|/fetch|
 |```GA_COLLECT_REDIRECT_ENDPOINT```|Set the new name for the /r/collect endpoint.|/fetch_r|
 |```GA_COLLECT_J_ENDPOINT```|Set the new name for the /j/collect endpoint. Couldn't find out yet for what this endpoint is. If you know more, please share! :)|/fetch_j|
+|```GA_COLLECT_G_ENDPOINT```|Set the new name for the /g/collect endpoint. Couldn't find out yet for what this endpoint is. If you know more, please share! :)|/fetch_g|
 |```PROXY_IP_HEADER```|The header variable where the proxy will find the IP address of the user.|X-Forwarded-For|
 |```PROXY_IP_HEADER_INDEX```|The header variable value will be split by comma. With this variable you can set the index of the users IP.|0|
 |```ENABLE_SERVER_SIDE_GA_COOKIES```|If the proxy should transfer the client id to a serverside cookie, set this to true.|true|

server/ga.go

@@ -169,6 +169,9 @@ func googleAnalyticsJsHandle(w http.ResponseWriter, r *http.Request, path string
 		re = regexp.MustCompile(`\"/j\/collect`)
 		body = re.ReplaceAll([]byte(body), []byte(`"`+settingsGGGP.GaCollectEndpointJ))
 
+		re = regexp.MustCompile(`\"/g\/collect`)
+		body = re.ReplaceAll([]byte(body), []byte(`"`+settingsGGGP.GaCollectEndpointG))
+
 		re = regexp.MustCompile(`\"/collect`)
 		body = re.ReplaceAll([]byte(body), []byte(`"`+settingsGGGP.GaCollectEndpoint))
 
@@ -301,6 +304,8 @@ func googleAnalyticsCollectHandle(w http.ResponseWriter, r *http.Request) {
 		clientURL = `https://www.google-analytics.com/r/collect`
 	case settingsGGGP.GaCollectEndpointJ:
 		clientURL = `https://www.google-analytics.com/j/collect`
+	case settingsGGGP.GaCollectEndpointG:
+		clientURL = `https://www.google-analytics.com/g/collect`
 	case settingsGGGP.GaCollectEndpoint:
 		fallthrough
 	default:

server/main.go

@@ -34,6 +34,7 @@ type settingsStruct struct {
 	GaCollectEndpoint         string
 	GaCollectEndpointRedirect string
 	GaCollectEndpointJ        string
+	GaCollectEndpointG        string
 	RestrictGtmIds            bool
 	AllowedGtmIds             []string
 	EnableServerSideGaCookies bool
@@ -135,6 +136,7 @@ func main() {
 	settingsGGGP.GaCollectEndpoint = os.Getenv(`GA_COLLECT_ENDPOINT`)
 	settingsGGGP.GaCollectEndpointRedirect = os.Getenv(`GA_COLLECT_REDIRECT_ENDPOINT`)
 	settingsGGGP.GaCollectEndpointJ = os.Getenv(`GA_COLLECT_J_ENDPOINT`)
+	settingsGGGP.GaCollectEndpointG = os.Getenv(`GA_COLLECT_G_ENDPOINT`)
 
 	settingsGGGP.AllowedGtmIds = strings.Split(os.Getenv(`GTM_IDS`), `,`)
 
@@ -229,6 +231,7 @@ func main() {
 	http.HandleFunc(settingsGGGP.GaCollectEndpoint, collectHandle)
 	http.HandleFunc(settingsGGGP.GaCollectEndpointRedirect, collectHandle)
 	http.HandleFunc(settingsGGGP.GaCollectEndpointJ, collectHandle)
+	http.HandleFunc(settingsGGGP.GaCollectEndpointG, collectHandle)
 
 	if err := http.ListenAndServe(`:8080`, nil); err != nil {
 		panic(err)