<commit_before>require 'digest/sha1'
require 'mime/types'
require 'rack'

module Imagetastic
  class UrlHandler
    
    # Exceptions
    class IncorrectSHA < RuntimeError; end
    class SHANotGiven < RuntimeError; end
    
    include Rack::Utils
    include Configurable
    include Imagetastic::Utils

    MAPPINGS = {
      :processing_method => 'm',
      :processing_options => 'o',
      :encoding => 'e',
      :sha => 's'
    }
 
    configurable_attr :protect_from_dos_attacks, true
    configurable_attr :secret, 'This is a secret!'
    configurable_attr :sha_length, 16
    configurable_attr :path_prefix, ''

    def initialize(parameters_class = Parameters)
      @parameters_class = parameters_class
    end

    def url_for(uid, *args)
      if args.empty?
        parameters = parameters_class.new(:uid => uid)
      elsif args.length == 1 && args.first.is_a?(Hash)
        attributes = args.first.merge(:uid => uid)
        parameters = parameters_class.new(attributes)
      else
        parameters = parameters_class.from_shortcut(*args)
        parameters.uid = uid
      end
      parameters_to_url(parameters)
    end

    def url_to_parameters(path, query_string)
      query = parse_nested_query(query_string)
      attributes = {
        :uid => extract_uid(path, query),
        :processing_method => extract_processing_method(path, query),
        :processing_options => extract_processing_options(path, query),
        :mime_type => extract_mime_type(path, query),
        :encoding => extract_encoding(path, query)
      }.reject{|k,v| v.nil? }
      parameters = parameters_class.new(attributes)
      validate_parameters(parameters, query)
      parameters
    end

    def parameters_to_url(parameters)
      query_string = [:processing_method, :processing_options, :encoding].map do |attribute|
        build_query(MAPPINGS[attribute] => parameters[attribute]) unless blank?(parameters[attribute])
      end.compact.join('&')
      extension = extension_from_mime_type(parameters.mime_type)
      sha_string = "&#{MAPPINGS[:sha]}=#{sha_from_parameters(parameters)}" if protect_from_dos_attacks?
      "#{path_prefix}/#{parameters.uid}.#{extension}?#{query_string}#{sha_string}"
    end

    private

    def extract_uid(path, query)
      path.sub(path_prefix, '').sub(/^\//,'').split('.').first
    end
  
    def extract_processing_method(path, query)
      query[MAPPINGS[:processing_method]]
    end<commit_msg>Clean up trailing '?' from url<commit_after>require 'digest/sha1'
require 'mime/types'
require 'rack'

module Imagetastic
  class UrlHandler
    
    # Exceptions
    class IncorrectSHA < RuntimeError; end
    class SHANotGiven < RuntimeError; end
    
    include Rack::Utils
    include Configurable
    include Imagetastic::Utils

    MAPPINGS = {
      :processing_method => 'm',
      :processing_options => 'o',
      :encoding => 'e',
      :sha => 's'
    }
 
    configurable_attr :protect_from_dos_attacks, true
    configurable_attr :secret, 'This is a secret!'
    configurable_attr :sha_length, 16
    configurable_attr :path_prefix, ''

    def initialize(parameters_class = Parameters)
      @parameters_class = parameters_class
    end

    def url_for(uid, *args)
      if args.empty?
        parameters = parameters_class.new(:uid => uid)
      elsif args.length == 1 && args.first.is_a?(Hash)
        attributes = args.first.merge(:uid => uid)
        parameters = parameters_class.new(attributes)
      else
        parameters = parameters_class.from_shortcut(*args)
        parameters.uid = uid
      end
      parameters_to_url(parameters)
    end

    def url_to_parameters(path, query_string)
      query = parse_nested_query(query_string)
      attributes = {
        :uid => extract_uid(path, query),
        :processing_method => extract_processing_method(path, query),
        :processing_options => extract_processing_options(path, query),
        :mime_type => extract_mime_type(path, query),
        :encoding => extract_encoding(path, query)
      }.reject{|k,v| v.nil? }
      parameters = parameters_class.new(attributes)
      validate_parameters(parameters, query)
      parameters
    end

    def parameters_to_url(parameters)
      query_string = [:processing_method, :processing_options, :encoding].map do |attribute|
        build_query(MAPPINGS[attribute] => parameters[attribute]) unless blank?(parameters[attribute])
      end.compact.join('&')
      extension = extension_from_mime_type(parameters.mime_type)
      sha_string = "&#{MAPPINGS[:sha]}=#{sha_from_parameters(parameters)}" if protect_from_dos_attacks?
      url = "#{path_prefix}/#{parameters.uid}.#{extension}?#{query_string}#{sha_string}"
      url.sub!(/\?$/,'')
      url
    end

    private

    def extract_uid(path, query)
      path.sub(path_prefix, '').sub(/^\//,'').split('.').first
    end
  
    def extract_processing_method(path, query)
      query[MAPPINGS[:processing_method]]
    end
{'fraction_non_alphanumeric': 0.11460855528652139, 'fraction_numerical': 0.0016142050040355124, 'mean_word_length': 3.3406304728546408, 'pattern_counts': {'":': 0, '<': 7, '<?xml version=': 0, '>': 27, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '5261723', 'n_tokens_mistral': 1508, 'n_tokens_neox': 1469, 'n_words': 288}