fix: import cycle issues

server/parsers/url.go

@@ -0,0 +1,100 @@
+package parsers
+
+import (
+	"net/url"
+	"strings"
+
+	"github.com/authorizerdev/authorizer/server/constants"
+	"github.com/authorizerdev/authorizer/server/memorystore"
+	"github.com/gin-gonic/gin"
+)
+
+// GetHost returns hostname from request context
+// if X-Authorizer-URL header is set it is given highest priority
+// if EnvKeyAuthorizerURL is set it is given second highest priority.
+// if above 2 are not set the requesting host name is used
+func GetHost(c *gin.Context) string {
+	authorizerURL := c.Request.Header.Get("X-Authorizer-URL")
+	if authorizerURL != "" {
+		return authorizerURL
+	}
+
+	authorizerURL, err := memorystore.Provider.GetStringStoreEnvVariable(constants.EnvKeyAuthorizerURL)
+	if err == nil {
+		authorizerURL = ""
+	}
+	if authorizerURL != "" {
+		return authorizerURL
+	}
+
+	scheme := c.Request.Header.Get("X-Forwarded-Proto")
+	if scheme != "https" {
+		scheme = "http"
+	}
+	host := c.Request.Host
+	return scheme + "://" + host
+}
+
+// GetHostName function returns hostname and port
+func GetHostParts(uri string) (string, string) {
+	tempURI := uri
+	if !strings.HasPrefix(tempURI, "http://") && !strings.HasPrefix(tempURI, "https://") {
+		tempURI = "https://" + tempURI
+	}
+
+	u, err := url.Parse(tempURI)
+	if err != nil {
+		return "localhost", "8080"
+	}
+
+	host := u.Hostname()
+	port := u.Port()
+
+	return host, port
+}
+
+// GetDomainName function to get domain name
+func GetDomainName(uri string) string {
+	tempURI := uri
+	if !strings.HasPrefix(tempURI, "http://") && !strings.HasPrefix(tempURI, "https://") {
+		tempURI = "https://" + tempURI
+	}
+
+	u, err := url.Parse(tempURI)
+	if err != nil {
+		return `localhost`
+	}
+
+	host := u.Hostname()
+
+	// code to get root domain in case of sub-domains
+	hostParts := strings.Split(host, ".")
+	hostPartsLen := len(hostParts)
+
+	if hostPartsLen == 1 {
+		return host
+	}
+
+	if hostPartsLen == 2 {
+		if hostParts[0] == "www" {
+			return hostParts[1]
+		} else {
+			return host
+		}
+	}
+
+	if hostPartsLen > 2 {
+		return strings.Join(hostParts[hostPartsLen-2:], ".")
+	}
+
+	return host
+}
+
+// GetAppURL to get /app/ url if not configured by user
+func GetAppURL(gc *gin.Context) string {
+	envAppURL, err := memorystore.Provider.GetStringStoreEnvVariable(constants.EnvKeyAppURL)
+	if envAppURL == "" || err != nil {
+		envAppURL = GetHost(gc) + "/app"
+	}
+	return envAppURL
+}