Sanitize base_url and directory parameters

this might be the cause of #25, at least from what it appears

lib/wayback_machine_downloader.rb

@@ -133,10 +133,11 @@ class WaybackMachineDownloader
 
   def initialize params
     validate_params(params)
-    @base_url = params[:base_url]
+    @base_url = params[:base_url]&.tidy_bytes
     @exact_url = params[:exact_url]
     if params[:directory]
-      @directory = File.expand_path(params[:directory])
+      sanitized_dir = params[:directory].tidy_bytes
+      @directory = File.expand_path(sanitized_dir)
     else
       @directory = nil
     end
@@ -694,7 +695,6 @@ class WaybackMachineDownloader
     file_timestamp = file_remote_info[:timestamp]
     
     # sanitize file_id to ensure it is a valid path component
-    file_id = file_id.tidy_bytes if file_id
     raw_path_elements = file_id.split('/')
 
     sanitized_path_elements = raw_path_elements.map do |element|

lib/wayback_machine_downloader/archive_api.rb

@@ -25,7 +25,7 @@ module ArchiveAPI
       # Check if the response contains the header ["timestamp", "original"]
       json.shift if json.first == ["timestamp", "original"]
       json
-    rescue JSON::ParserError, StandardError => e
+    rescue JSON::ParserError => e
       warn "Failed to fetch data from API: #{e.message}"
       []
     end