Initial API setup: GET and POST handlers and base permission checks.

be/app/helper/api-helper.go

@@ -0,0 +1,74 @@
+package helper
+
+import (
+	"log"
+	"net"
+	"net/http"
+	"strings"
+
+	. "be/app/structs"
+)
+
+func EndpointAccess(w http.ResponseWriter, r *http.Request) bool {
+	log.Println("endpoint access")
+
+	ip, _, err := net.SplitHostPort(r.RemoteAddr)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	if (isLocal(ip) && isEndpointAllowed("Local", r.URL.Path)) ||
+		(isLanRemote(ip) && isEndpointAllowed("Remote", r.URL.Path)) {
+		log.Println("accessible")
+		return true
+	} else if isLanRemote(ip) && isEndpointAllowed("auth", r.URL.Path) && isDeviceAuthorized() {
+		log.Println("authorized")
+	}
+
+	log.Println(r.URL.Path, "not authorized or accessible")
+
+	return false
+}
+
+func isLocal(ip string) bool {
+	return ip == "127.0.0.1" || ip == "::1"
+}
+
+func isLanRemote(ip string) bool {
+	return strings.HasPrefix(ip, "192.168.")
+}
+
+func isEndpointAllowed(source string, endpoint string) bool {
+	var endpoints, err = getAllowedEndpoints(source)
+	if err != "" {
+		log.Println(err)
+	}
+
+	if (endpoints != nil) && (len(endpoints) > 0) {
+		for _, e := range endpoints {
+			if e == endpoint {
+				return true
+			}
+		}
+	}
+
+	return false
+}
+
+func getAllowedEndpoints(source string) (endpoints []string, err string) {
+	if source == "Local" {
+		return Endpoints.Local, ""
+	}
+	if source == "Remote" {
+		return Endpoints.Remote, ""
+	}
+	if source == "Auth" {
+		return Endpoints.Auth, ""
+	}
+
+	return []string{}, "No allowed endpoints"
+}
+
+func isDeviceAuthorized() bool {
+	return false
+}