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# frozen_string_literal: true
module ActionDispatch
module Journey # :nodoc:
class Router # :nodoc:
class Utils # :nodoc:
# Normalizes URI path.
#
# Strips off trailing slash and ensures there is a leading slash.
# Also converts downcase URL encoded string to uppercase.
#
# normalize_path("/foo") # => "/foo"
# normalize_path("/foo/") # => "/foo"
# normalize_path("foo") # => "/foo"
# normalize_path("") # => "/"
# normalize_path("/%ab") # => "/%AB"
def self.normalize_path(path)
path ||= ""
encoding = path.encoding
path = +"/#{path}"
path.squeeze!("/")
path.sub!(%r{/+\Z}, "")
path.gsub!(/(%[a-f0-9]{2})/) { $1.upcase }
path = +"/" if path == ""
path.force_encoding(encoding)
path
end
# URI path and fragment escaping
# https://tools.ietf.org/html/rfc3986
class UriEncoder # :nodoc:
ENCODE = "%%%02X"
US_ASCII = Encoding::US_ASCII
UTF_8 = Encoding::UTF_8
EMPTY = (+"").force_encoding(US_ASCII).freeze
DEC2HEX = (0..255).to_a.map { |i| ENCODE % i }.map { |s| s.force_encoding(US_ASCII) }
ALPHA = "a-zA-Z"
DIGIT = "0-9"
UNRESERVED = "#{ALPHA}#{DIGIT}\\-\\._~"
SUB_DELIMS = "!\\$&'\\(\\)\\*\\+,;="
ESCAPED = /%[a-zA-Z0-9]{2}/.freeze
FRAGMENT = /[^#{UNRESERVED}#{SUB_DELIMS}:@\/\?]/.freeze
SEGMENT = /[^#{UNRESERVED}#{SUB_DELIMS}:@]/.freeze
PATH = /[^#{UNRESERVED}#{SUB_DELIMS}:@\/]/.freeze
def escape_fragment(fragment)
escape(fragment, FRAGMENT)
end
def escape_path(path)
escape(path, PATH)
end
def escape_segment(segment)
escape(segment, SEGMENT)
end
def unescape_uri(uri)
encoding = uri.encoding == US_ASCII ? UTF_8 : uri.encoding
uri.gsub(ESCAPED) { |match| [match[1, 2].hex].pack("C") }.force_encoding(encoding)
end
private
def escape(component, pattern)
component.gsub(pattern) { |unsafe| percent_encode(unsafe) }.force_encoding(US_ASCII)
end
def percent_encode(unsafe)
safe = EMPTY.dup
unsafe.each_byte { |b| safe << DEC2HEX[b] }
safe
end
end
ENCODER = UriEncoder.new
def self.escape_path(path)
ENCODER.escape_path(path.to_s)
end
def self.escape_segment(segment)
ENCODER.escape_segment(segment.to_s)
end
def self.escape_fragment(fragment)
ENCODER.escape_fragment(fragment.to_s)
end
# Replaces any escaped sequences with their unescaped representations.
#
# uri = "/topics?title=Ruby%20on%20Rails"
# unescape_uri(uri) #=> "/topics?title=Ruby on Rails"
def self.unescape_uri(uri)
ENCODER.unescape_uri(uri)
end
end
end
end
end
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