Extract URI parser compatibility logic

This refactoring moves compatibility handling for `URI::RFC2396_PARSER` (Ruby 3.4+)
and `URI::DEFAULT_PARSER` (<= 3.3) into `Langchain::Utils::UriParser`.

Follow-up to patterns-ai-core#980 (comment).

Author: koic

lib/langchain/assistant/messages/ollama_message.rb

@@ -24,10 +24,7 @@ class OllamaMessage < Base
         def initialize(role:, content: nil, image_url: nil, tool_calls: [], tool_call_id: nil)
           raise ArgumentError, "Role must be one of #{ROLES.join(", ")}" unless ROLES.include?(role)
           raise ArgumentError, "Tool calls must be an array of hashes" unless tool_calls.is_a?(Array) && tool_calls.all? { |tool_call| tool_call.is_a?(Hash) }
-
-          # Ensure compatibility with `URI::RFC2396_PARSER` (Ruby 3.4+) and `URI::DEFAULT_PARSER` (<= 3.3).
-          uri_parser = defined?(URI::RFC2396_PARSER) ? URI::RFC2396_PARSER : URI::DEFAULT_PARSER
-          raise ArgumentError, "image_url must be a valid url" if image_url && !uri_parser.make_regexp.match?(image_url)
+          raise ArgumentError, "image_url must be a valid url" if image_url && !Langchain::Utils::UriParser.make_regexp.match?(image_url)
 
           @role = role
           # Some Tools return content as a JSON hence `.to_s`

lib/langchain/loader.rb

@@ -91,10 +91,7 @@ def load(&block)
 
     def load_from_url
       unescaped_url = URI.decode_www_form_component(@path)
-
-      # Ensure compatibility with `URI::RFC2396_PARSER` (Ruby 3.4+) and `URI::DEFAULT_PARSER` (<= 3.3).
-      uri_parser = defined?(URI::RFC2396_PARSER) ? URI::RFC2396_PARSER : URI::DEFAULT_PARSER
-      escaped_url = uri_parser.escape(unescaped_url)
+      escaped_url = Langchain::Utils::UriParser.escape(unescaped_url)
 
       URI.parse(escaped_url).open
     end

lib/langchain/processors/eml.rb

@@ -52,12 +52,9 @@ def extract_text_content(mail)
 
       # Clean and format the extracted content
       def clean_content(content)
-        # Ensure compatibility with `URI::RFC2396_PARSER` (Ruby 3.4+) and `URI::DEFAULT_PARSER` (<= 3.3).
-        uri_parser = defined?(URI::RFC2396_PARSER) ? URI::RFC2396_PARSER : URI::DEFAULT_PARSER
-
         content
           .gsub(/\[cid:[^\]]+\]/, "") # Remove embedded image references
-          .gsub(uri_parser.make_regexp(%w[http https])) { |match| "<#{match}>" } # Format URLs
+          .gsub(Langchain::Utils::UriParser.make_regexp(%w[http https])) { |match| "<#{match}>" } # Format URLs
           .gsub(/\r\n?/, "\n") # Normalize line endings to Unix style
           .gsub(/[\u200B-\u200D\uFEFF]/, "") # Remove zero width spaces and similar characters
           .gsub(/<\/?[^>]+>/, "") # Remove any HTML tags that might have sneaked in