fix: regex for CT log validation

We now also accept urls with a trailing slash. The URLs will be normalized anyway.

fixes #62

Author: d-Rickyy-b

config.sample.yaml

@@ -23,10 +23,10 @@ general:
   # When you want to add logs that are not contained in the log list provided by
   # Google (https://www.gstatic.com/ct/log_list/v3/log_list.json), you can add them here.
   additional_logs:
-    - url: https://ct.googleapis.com/logs/us1/mirrors/digicert_nessie2022/
+    - url: https://ct.googleapis.com/logs/us1/mirrors/digicert_nessie2022
       operator: "DigiCert"
       description: "DigiCert Nessie2022 log"
-    - url: https://dodo.ct.comodo.com/
+    - url: https://dodo.ct.comodo.com
       operator: "Comodo"
       description: "Comodo Dodo"
   # To optimize the performance of the server, you can overwrite the size of different buffers

internal/config/config.go

@@ -140,7 +140,7 @@ func parseConfigFromBytes(data []byte) (*Config, error) {
 func validateConfig(config *Config) bool {
 	// Still matches invalid IP addresses but good enough for detecting completely wrong formats
 	URLPathRegex := regexp.MustCompile(`^(/[a-zA-Z0-9\-._]+)+$`)
-	URLRegex := regexp.MustCompile(`^https?://[a-zA-Z0-9\-._]+(:[0-9]+)?(/[a-zA-Z0-9\-._]+)*$`)
+	URLRegex := regexp.MustCompile(`^https?://[a-zA-Z0-9\-._]+(:[0-9]+)?(/[a-zA-Z0-9\-._]+)*/?$`)
 
 	// Check webserver config
 	if config.Webserver.ListenAddr == "" || net.ParseIP(config.Webserver.ListenAddr) == nil {