Better support for .php, .asp, and other files when using --local

see #37

lib/wayback_machine_downloader.rb

@@ -127,6 +127,7 @@ class WaybackMachineDownloader
 
   include ArchiveAPI
   include SubdomainProcessor
+  include URLRewrite
 
   VERSION = "2.4.4"
   DEFAULT_TIMEOUT = 30
@@ -648,7 +649,8 @@ class WaybackMachineDownloader
     begin
       content = File.binread(file_path)
 
-      if file_ext == '.html' || file_ext == '.htm'
+      # detect encoding for HTML files
+      if file_ext == '.html' || file_ext == '.htm' || file_ext == '.php' || file_ext == '.asp'
         encoding = content.match(/<meta\s+charset=["']?([^"'>]+)/i)&.captures&.first || 'UTF-8'
         content.force_encoding(encoding) rescue content.force_encoding('UTF-8')
       else
@@ -664,13 +666,13 @@ class WaybackMachineDownloader
       # URLs in JavaScript
       content = rewrite_js_urls(content)
       
-      # for URLs in HTML attributes that start with a single slash
+      # for URLs that start with a single slash, make them relative
       content.gsub!(/(\s(?:href|src|action|data-src|data-url)=["'])\/([^"'\/][^"']*)(["'])/i) do
         prefix, path, suffix = $1, $2, $3
         "#{prefix}./#{path}#{suffix}"
       end
       
-      # for URLs in CSS that start with a single slash
+      # for URLs in CSS that start with a single slash, make them relative
       content.gsub!(/url\(\s*["']?\/([^"'\)\/][^"'\)]*?)["']?\s*\)/i) do
         path = $1
         "url(\"./#{path}\")"

lib/wayback_machine_downloader/url_rewrite.rb

@@ -1,74 +1,85 @@
 # frozen_string_literal: true
 
-# URLs in HTML attributes
+module URLRewrite
+  # server-side extensions that should work locally
+  SERVER_SIDE_EXTS = %w[.php .asp .aspx .jsp .cgi .pl .py].freeze
+
   def rewrite_html_attr_urls(content)
-  
-  content.gsub!(/(\s(?:href|src|action|data-src|data-url)=["'])https?:\/\/web\.archive\.org\/web\/[0-9]+(?:id_)?\/([^"']+)(["'])/i) do
-    prefix, url, suffix = $1, $2, $3
-    
-    if url.start_with?('http')
-      begin
-        uri = URI.parse(url)
-        path = uri.path
-        path = path[1..-1] if path.start_with?('/')
+    # rewrite URLs to relative paths
+    content.gsub!(/(\s(?:href|src|action|data-src|data-url)=["'])https?:\/\/web\.archive\.org\/web\/\d+(?:id_)?\/https?:\/\/[^\/]+([^"']*)(["'])/i) do
+      prefix, path, suffix = $1, $2, $3
+      path = normalize_path_for_local(path)
       "#{prefix}#{path}#{suffix}"
-      rescue
-        "#{prefix}#{url}#{suffix}"
-      end
-    elsif url.start_with?('/')
-      "#{prefix}./#{url[1..-1]}#{suffix}"
-    else
-      "#{prefix}#{url}#{suffix}"
     end
+
+    # rewrite absolute URLs to same domain as relative
+    content.gsub!(/(\s(?:href|src|action|data-src|data-url)=["'])https?:\/\/[^\/]+([^"']*)(["'])/i) do
+      prefix, path, suffix = $1, $2, $3
+      path = normalize_path_for_local(path)
+      "#{prefix}#{path}#{suffix}"
     end
+
     content
   end
 
-# URLs in CSS
   def rewrite_css_urls(content)
-
-  content.gsub!(/url\(\s*["']?https?:\/\/web\.archive\.org\/web\/[0-9]+(?:id_)?\/([^"'\)]+)["']?\s*\)/i) do
-    url = $1
-    
-    if url.start_with?('http')
-      begin
-        uri = URI.parse(url)
-        path = uri.path
-        path = path[1..-1] if path.start_with?('/')
+    # rewrite URLs in CSS
+    content.gsub!(/url\(\s*["']?https?:\/\/web\.archive\.org\/web\/\d+(?:id_)?\/https?:\/\/[^\/]+([^"'\)]*?)["']?\s*\)/i) do
+      path = normalize_path_for_local($1)
       "url(\"#{path}\")"
-      rescue
-        "url(\"#{url}\")"
-      end
-    elsif url.start_with?('/')
-      "url(\"./#{url[1..-1]}\")"
-    else
-      "url(\"#{url}\")"
     end
+
+    # rewrite absolute URLs in CSS
+    content.gsub!(/url\(\s*["']?https?:\/\/[^\/]+([^"'\)]*?)["']?\s*\)/i) do
+      path = normalize_path_for_local($1)
+      "url(\"#{path}\")"
     end
+
     content
   end
 
-# URLs in JavaScript
   def rewrite_js_urls(content)
-  
-  content.gsub!(/(["'])https?:\/\/web\.archive\.org\/web\/[0-9]+(?:id_)?\/([^"']+)(["'])/i) do
-    quote_start, url, quote_end = $1, $2, $3
-    
-    if url.start_with?('http')
-      begin
-        uri = URI.parse(url)
-        path = uri.path
-        path = path[1..-1] if path.start_with?('/')
+    # rewrite archive.org URLs in JavaScript strings
+    content.gsub!(/(["'])https?:\/\/web\.archive\.org\/web\/\d+(?:id_)?\/https?:\/\/[^\/]+([^"']*)(["'])/i) do
+      quote_start, path, quote_end = $1, $2, $3
+      path = normalize_path_for_local(path)
       "#{quote_start}#{path}#{quote_end}"
-      rescue
-        "#{quote_start}#{url}#{quote_end}"
-      end
-    elsif url.start_with?('/')
-      "#{quote_start}./#{url[1..-1]}#{quote_end}"
-    else
-      "#{quote_start}#{url}#{quote_end}"
     end
+
+    # rewrite absolute URLs in JavaScript
+    content.gsub!(/(["'])https?:\/\/[^\/]+([^"']*)(["'])/i) do
+      quote_start, path, quote_end = $1, $2, $3
+      next "#{quote_start}http#{$2}#{quote_end}" if $2.start_with?('s://', '://')
+      path = normalize_path_for_local(path)
+      "#{quote_start}#{path}#{quote_end}"
     end
 
     content
   end
+
+  private
+
+  def normalize_path_for_local(path)
+    return "./index.html" if path.empty? || path == "/"
+    
+    # handle query strings - they're already part of the filename
+    path = path.split('?').first if path.include?('?')
+    
+    # check if this is a server-side script
+    ext = File.extname(path).downcase
+    if SERVER_SIDE_EXTS.include?(ext)
+      # keep the path as-is but ensure it starts with ./
+      path = "./#{path}" unless path.start_with?('./', '/')
+    else
+      # regular file handling
+      path = "./#{path}" unless path.start_with?('./', '/')
+      
+      # if it looks like a directory, add index.html
+      if path.end_with?('/') || !path.include?('.')
+        path = "#{path.chomp('/')}/index.html"
+      end
+    end
+    
+    path
+  end
+end