Attempt at fixing --all

I honestly don't recall if this was implemented in the original code, and I'm guessing this worked at *some point* during this fork. It seems to work correctly now, however. See #6 and #11

lib/wayback_machine_downloader.rb

@@ -477,8 +477,8 @@ class WaybackMachineDownloader
         begin
           @connection_pool.with_connection do |connection|
             result_message = download_file(file_remote_info, connection)
-            # for now, assume success if no exception and message doesn't indicate error/skip
-            if result_message && !result_message.downcase.include?('error') && !result_message.downcase.include?('failed') && !result_message.downcase.include?('skipping') && !result_message.downcase.include?('already exists')
+            # assume download success if the result message contains ' -> '
+            if result_message && result_message.include?(' -> ')
                download_success = true
             end
             @download_mutex.synchronize do
@@ -659,11 +659,21 @@ class WaybackMachineDownloader
 
     begin
       structure_dir_path dir_path
-      download_with_retry(file_path, file_url, file_timestamp, http)
+      status = download_with_retry(file_path, file_url, file_timestamp, http)
+
+      case status
+      when :saved
         if @rewrite && File.extname(file_path) =~ /\.(html?|css|js)$/i
           rewrite_urls_to_relative(file_path)
         end
         "#{file_url} -> #{file_path} (#{@processed_file_count + 1}/#{@total_to_download})"
+      when :skipped_not_found
+        "Skipped (not found): #{file_url} (#{@processed_file_count + 1}/#{@total_to_download})"
+      else
+        # ideally, this case should not be reached if download_with_retry behaves as expected.
+        @logger.warn("Unknown status from download_with_retry for #{file_url}: #{status}")
+        "Unknown status for #{file_url}: #{status} (#{@processed_file_count + 1}/#{@total_to_download})"
+      end
     rescue StandardError => e
       msg = "Failed: #{file_url} # #{e} (#{@processed_file_count + 1}/#{@total_to_download})"
       if File.exist?(file_path) and File.size(file_path) == 0
@@ -714,8 +724,7 @@ class WaybackMachineDownloader
 
       response = connection.request(request)
 
-      case response
-      when Net::HTTPSuccess
+      save_response_body = lambda do
         File.open(file_path, "wb") do |file|
           body = response.body
           if response['content-encoding'] == 'gzip' && body && !body.empty?
@@ -725,13 +734,34 @@ class WaybackMachineDownloader
               gz.close
               file.write(decompressed_body)
             rescue Zlib::GzipFile::Error => e
-              @logger.warn("Failure decompressing gzip file #{file_url}: #{e.message}")
+              @logger.warn("Failure decompressing gzip file #{file_url}: #{e.message}. Writing raw body.")
               file.write(body)
             end
           else
             file.write(body) if body
           end
         end
+      end
+
+      if @all
+        case response
+        when Net::HTTPSuccess, Net::HTTPRedirection, Net::HTTPClientError, Net::HTTPServerError
+          save_response_body.call
+          if response.is_a?(Net::HTTPRedirection)
+            @logger.info("Saved redirect page for #{file_url} (status #{response.code}).")
+          elsif response.is_a?(Net::HTTPClientError) || response.is_a?(Net::HTTPServerError)
+            @logger.info("Saved error page for #{file_url} (status #{response.code}).")
+          end
+          return :saved
+        else
+          # for any other response type when --all is true, treat as an error to be retried or failed
+          raise "Unhandled HTTP response: #{response.code} #{response.message}"
+        end
+      else # not @all (our default behavior)
+        case response
+        when Net::HTTPSuccess
+          save_response_body.call
+          return :saved
         when Net::HTTPRedirection
           raise "Too many redirects for #{file_url}" if redirect_count >= 2
           location = response['location']
@@ -742,10 +772,11 @@ class WaybackMachineDownloader
           raise "Rate limited, retrying..."
         when Net::HTTPNotFound
           @logger.warn("File not found, skipping: #{file_url}")
-        return
+          return :skipped_not_found
         else
           raise "HTTP Error: #{response.code} #{response.message}"
         end
+      end
 
     rescue StandardError => e
       if retries < MAX_RETRIES