540 lines
17 KiB
Ruby
540 lines
17 KiB
Ruby
# frozen_string_literal: false
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#--
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# = uri/common.rb
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#
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# Author:: Akira Yamada <akira@ruby-lang.org>
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# License::
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# You can redistribute it and/or modify it under the same term as Ruby.
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#
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# See URI for general documentation
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#
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module URI
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#
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# Includes URI::REGEXP::PATTERN
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#
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module RFC2396_REGEXP
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#
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# Patterns used to parse URI's
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#
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module PATTERN
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# :stopdoc:
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# RFC 2396 (URI Generic Syntax)
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# RFC 2732 (IPv6 Literal Addresses in URL's)
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# RFC 2373 (IPv6 Addressing Architecture)
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# alpha = lowalpha | upalpha
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ALPHA = "a-zA-Z"
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# alphanum = alpha | digit
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ALNUM = "#{ALPHA}\\d"
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# hex = digit | "A" | "B" | "C" | "D" | "E" | "F" |
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# "a" | "b" | "c" | "d" | "e" | "f"
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HEX = "a-fA-F\\d"
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# escaped = "%" hex hex
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ESCAPED = "%[#{HEX}]{2}"
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# mark = "-" | "_" | "." | "!" | "~" | "*" | "'" |
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# "(" | ")"
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# unreserved = alphanum | mark
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UNRESERVED = "\\-_.!~*'()#{ALNUM}"
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# reserved = ";" | "/" | "?" | ":" | "@" | "&" | "=" | "+" |
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# "$" | ","
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# reserved = ";" | "/" | "?" | ":" | "@" | "&" | "=" | "+" |
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# "$" | "," | "[" | "]" (RFC 2732)
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RESERVED = ";/?:@&=+$,\\[\\]"
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# domainlabel = alphanum | alphanum *( alphanum | "-" ) alphanum
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DOMLABEL = "(?:[#{ALNUM}](?:[-#{ALNUM}]*[#{ALNUM}])?)"
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# toplabel = alpha | alpha *( alphanum | "-" ) alphanum
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TOPLABEL = "(?:[#{ALPHA}](?:[-#{ALNUM}]*[#{ALNUM}])?)"
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# hostname = *( domainlabel "." ) toplabel [ "." ]
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HOSTNAME = "(?:#{DOMLABEL}\\.)*#{TOPLABEL}\\.?"
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# :startdoc:
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end # PATTERN
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# :startdoc:
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end # REGEXP
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# Class that parses String's into URI's.
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#
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# It contains a Hash set of patterns and Regexp's that match and validate.
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#
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class RFC2396_Parser
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include RFC2396_REGEXP
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#
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# == Synopsis
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#
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# URI::Parser.new([opts])
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#
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# == Args
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#
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# The constructor accepts a hash as options for parser.
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# Keys of options are pattern names of URI components
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# and values of options are pattern strings.
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# The constructor generates set of regexps for parsing URIs.
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#
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# You can use the following keys:
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#
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# * :ESCAPED (URI::PATTERN::ESCAPED in default)
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# * :UNRESERVED (URI::PATTERN::UNRESERVED in default)
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# * :DOMLABEL (URI::PATTERN::DOMLABEL in default)
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# * :TOPLABEL (URI::PATTERN::TOPLABEL in default)
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# * :HOSTNAME (URI::PATTERN::HOSTNAME in default)
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#
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# == Examples
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#
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# p = URI::Parser.new(:ESCAPED => "(?:%[a-fA-F0-9]{2}|%u[a-fA-F0-9]{4})")
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# u = p.parse("http://example.jp/%uABCD") #=> #<URI::HTTP http://example.jp/%uABCD>
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# URI.parse(u.to_s) #=> raises URI::InvalidURIError
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#
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# s = "http://example.com/ABCD"
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# u1 = p.parse(s) #=> #<URI::HTTP http://example.com/ABCD>
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# u2 = URI.parse(s) #=> #<URI::HTTP http://example.com/ABCD>
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# u1 == u2 #=> true
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# u1.eql?(u2) #=> false
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#
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def initialize(opts = {})
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@pattern = initialize_pattern(opts)
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@pattern.each_value(&:freeze)
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@pattern.freeze
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@regexp = initialize_regexp(@pattern)
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@regexp.each_value(&:freeze)
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@regexp.freeze
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end
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# The Hash of patterns.
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#
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# See also URI::Parser.initialize_pattern.
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attr_reader :pattern
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# The Hash of Regexp.
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#
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# See also URI::Parser.initialize_regexp.
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attr_reader :regexp
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# Returns a split URI against +regexp[:ABS_URI]+.
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def split(uri)
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case uri
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when ''
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# null uri
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when @regexp[:ABS_URI]
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scheme, opaque, userinfo, host, port,
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registry, path, query, fragment = $~[1..-1]
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# URI-reference = [ absoluteURI | relativeURI ] [ "#" fragment ]
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# absoluteURI = scheme ":" ( hier_part | opaque_part )
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# hier_part = ( net_path | abs_path ) [ "?" query ]
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# opaque_part = uric_no_slash *uric
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# abs_path = "/" path_segments
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# net_path = "//" authority [ abs_path ]
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# authority = server | reg_name
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# server = [ [ userinfo "@" ] hostport ]
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if !scheme
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raise InvalidURIError,
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"bad URI(absolute but no scheme): #{uri}"
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end
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if !opaque && (!path && (!host && !registry))
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raise InvalidURIError,
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"bad URI(absolute but no path): #{uri}"
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end
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when @regexp[:REL_URI]
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scheme = nil
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opaque = nil
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userinfo, host, port, registry,
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rel_segment, abs_path, query, fragment = $~[1..-1]
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if rel_segment && abs_path
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path = rel_segment + abs_path
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elsif rel_segment
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path = rel_segment
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elsif abs_path
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path = abs_path
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end
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# URI-reference = [ absoluteURI | relativeURI ] [ "#" fragment ]
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# relativeURI = ( net_path | abs_path | rel_path ) [ "?" query ]
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# net_path = "//" authority [ abs_path ]
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# abs_path = "/" path_segments
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# rel_path = rel_segment [ abs_path ]
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# authority = server | reg_name
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# server = [ [ userinfo "@" ] hostport ]
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else
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raise InvalidURIError, "bad URI(is not URI?): #{uri}"
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end
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path = '' if !path && !opaque # (see RFC2396 Section 5.2)
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ret = [
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scheme,
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userinfo, host, port, # X
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registry, # X
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path, # Y
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opaque, # Y
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query,
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fragment
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]
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return ret
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end
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#
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# == Args
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#
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# +uri+::
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# String
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#
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# == Description
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#
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# Parses +uri+ and constructs either matching URI scheme object
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# (File, FTP, HTTP, HTTPS, LDAP, LDAPS, or MailTo) or URI::Generic.
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#
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# == Usage
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#
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# p = URI::Parser.new
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# p.parse("ldap://ldap.example.com/dc=example?user=john")
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# #=> #<URI::LDAP ldap://ldap.example.com/dc=example?user=john>
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#
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def parse(uri)
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URI.for(*self.split(uri), self)
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end
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#
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# == Args
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#
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# +uris+::
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# an Array of Strings
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#
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# == Description
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#
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# Attempts to parse and merge a set of URIs.
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#
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def join(*uris)
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uris[0] = convert_to_uri(uris[0])
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uris.inject :merge
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end
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#
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# :call-seq:
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# extract( str )
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# extract( str, schemes )
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# extract( str, schemes ) {|item| block }
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#
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# == Args
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#
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# +str+::
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# String to search
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# +schemes+::
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# Patterns to apply to +str+
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#
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# == Description
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#
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# Attempts to parse and merge a set of URIs.
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# If no +block+ given, then returns the result,
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# else it calls +block+ for each element in result.
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#
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# See also URI::Parser.make_regexp.
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#
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def extract(str, schemes = nil)
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if block_given?
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str.scan(make_regexp(schemes)) { yield $& }
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nil
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else
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result = []
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str.scan(make_regexp(schemes)) { result.push $& }
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result
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end
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end
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# Returns Regexp that is default +self.regexp[:ABS_URI_REF]+,
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# unless +schemes+ is provided. Then it is a Regexp.union with +self.pattern[:X_ABS_URI]+.
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def make_regexp(schemes = nil)
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unless schemes
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@regexp[:ABS_URI_REF]
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else
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/(?=#{Regexp.union(*schemes)}:)#{@pattern[:X_ABS_URI]}/x
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end
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end
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#
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# :call-seq:
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# escape( str )
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# escape( str, unsafe )
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#
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# == Args
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#
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# +str+::
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# String to make safe
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# +unsafe+::
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# Regexp to apply. Defaults to +self.regexp[:UNSAFE]+
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#
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# == Description
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#
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# Constructs a safe String from +str+, removing unsafe characters,
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# replacing them with codes.
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#
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def escape(str, unsafe = @regexp[:UNSAFE])
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unless unsafe.kind_of?(Regexp)
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# perhaps unsafe is String object
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unsafe = Regexp.new("[#{Regexp.quote(unsafe)}]", false)
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end
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str.gsub(unsafe) do
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us = $&
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tmp = ''
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us.each_byte do |uc|
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tmp << sprintf('%%%02X', uc)
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end
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tmp
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end.force_encoding(Encoding::US_ASCII)
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end
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#
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# :call-seq:
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# unescape( str )
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# unescape( str, escaped )
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#
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# == Args
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#
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# +str+::
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# String to remove escapes from
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# +escaped+::
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# Regexp to apply. Defaults to +self.regexp[:ESCAPED]+
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#
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# == Description
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#
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# Removes escapes from +str+.
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#
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def unescape(str, escaped = @regexp[:ESCAPED])
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enc = str.encoding
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enc = Encoding::UTF_8 if enc == Encoding::US_ASCII
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str.gsub(escaped) { [$&[1, 2]].pack('H2').force_encoding(enc) }
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end
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@@to_s = Kernel.instance_method(:to_s)
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if @@to_s.respond_to?(:bind_call)
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def inspect
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@@to_s.bind_call(self)
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end
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else
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def inspect
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@@to_s.bind(self).call
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end
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end
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private
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# Constructs the default Hash of patterns.
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def initialize_pattern(opts = {})
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ret = {}
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ret[:ESCAPED] = escaped = (opts.delete(:ESCAPED) || PATTERN::ESCAPED)
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ret[:UNRESERVED] = unreserved = opts.delete(:UNRESERVED) || PATTERN::UNRESERVED
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ret[:RESERVED] = reserved = opts.delete(:RESERVED) || PATTERN::RESERVED
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ret[:DOMLABEL] = opts.delete(:DOMLABEL) || PATTERN::DOMLABEL
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ret[:TOPLABEL] = opts.delete(:TOPLABEL) || PATTERN::TOPLABEL
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ret[:HOSTNAME] = hostname = opts.delete(:HOSTNAME)
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# RFC 2396 (URI Generic Syntax)
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# RFC 2732 (IPv6 Literal Addresses in URL's)
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# RFC 2373 (IPv6 Addressing Architecture)
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# uric = reserved | unreserved | escaped
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ret[:URIC] = uric = "(?:[#{unreserved}#{reserved}]|#{escaped})"
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# uric_no_slash = unreserved | escaped | ";" | "?" | ":" | "@" |
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# "&" | "=" | "+" | "$" | ","
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ret[:URIC_NO_SLASH] = uric_no_slash = "(?:[#{unreserved};?:@&=+$,]|#{escaped})"
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# query = *uric
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ret[:QUERY] = query = "#{uric}*"
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# fragment = *uric
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ret[:FRAGMENT] = fragment = "#{uric}*"
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# hostname = *( domainlabel "." ) toplabel [ "." ]
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# reg-name = *( unreserved / pct-encoded / sub-delims ) # RFC3986
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unless hostname
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ret[:HOSTNAME] = hostname = "(?:[a-zA-Z0-9\\-.]|%\\h\\h)+"
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end
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# RFC 2373, APPENDIX B:
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# IPv6address = hexpart [ ":" IPv4address ]
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# IPv4address = 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT
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# hexpart = hexseq | hexseq "::" [ hexseq ] | "::" [ hexseq ]
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# hexseq = hex4 *( ":" hex4)
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# hex4 = 1*4HEXDIG
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#
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# XXX: This definition has a flaw. "::" + IPv4address must be
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# allowed too. Here is a replacement.
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#
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# IPv4address = 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT
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ret[:IPV4ADDR] = ipv4addr = "\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}"
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# hex4 = 1*4HEXDIG
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hex4 = "[#{PATTERN::HEX}]{1,4}"
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# lastpart = hex4 | IPv4address
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lastpart = "(?:#{hex4}|#{ipv4addr})"
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# hexseq1 = *( hex4 ":" ) hex4
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hexseq1 = "(?:#{hex4}:)*#{hex4}"
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# hexseq2 = *( hex4 ":" ) lastpart
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hexseq2 = "(?:#{hex4}:)*#{lastpart}"
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# IPv6address = hexseq2 | [ hexseq1 ] "::" [ hexseq2 ]
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ret[:IPV6ADDR] = ipv6addr = "(?:#{hexseq2}|(?:#{hexseq1})?::(?:#{hexseq2})?)"
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# IPv6prefix = ( hexseq1 | [ hexseq1 ] "::" [ hexseq1 ] ) "/" 1*2DIGIT
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# unused
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# ipv6reference = "[" IPv6address "]" (RFC 2732)
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ret[:IPV6REF] = ipv6ref = "\\[#{ipv6addr}\\]"
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# host = hostname | IPv4address
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# host = hostname | IPv4address | IPv6reference (RFC 2732)
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ret[:HOST] = host = "(?:#{hostname}|#{ipv4addr}|#{ipv6ref})"
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# port = *digit
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ret[:PORT] = port = '\d*'
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# hostport = host [ ":" port ]
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ret[:HOSTPORT] = hostport = "#{host}(?::#{port})?"
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# userinfo = *( unreserved | escaped |
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# ";" | ":" | "&" | "=" | "+" | "$" | "," )
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ret[:USERINFO] = userinfo = "(?:[#{unreserved};:&=+$,]|#{escaped})*"
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# pchar = unreserved | escaped |
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# ":" | "@" | "&" | "=" | "+" | "$" | ","
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pchar = "(?:[#{unreserved}:@&=+$,]|#{escaped})"
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# param = *pchar
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param = "#{pchar}*"
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# segment = *pchar *( ";" param )
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segment = "#{pchar}*(?:;#{param})*"
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# path_segments = segment *( "/" segment )
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ret[:PATH_SEGMENTS] = path_segments = "#{segment}(?:/#{segment})*"
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# server = [ [ userinfo "@" ] hostport ]
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server = "(?:#{userinfo}@)?#{hostport}"
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# reg_name = 1*( unreserved | escaped | "$" | "," |
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# ";" | ":" | "@" | "&" | "=" | "+" )
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ret[:REG_NAME] = reg_name = "(?:[#{unreserved}$,;:@&=+]|#{escaped})+"
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# authority = server | reg_name
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authority = "(?:#{server}|#{reg_name})"
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# rel_segment = 1*( unreserved | escaped |
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# ";" | "@" | "&" | "=" | "+" | "$" | "," )
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ret[:REL_SEGMENT] = rel_segment = "(?:[#{unreserved};@&=+$,]|#{escaped})+"
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# scheme = alpha *( alpha | digit | "+" | "-" | "." )
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ret[:SCHEME] = scheme = "[#{PATTERN::ALPHA}][\\-+.#{PATTERN::ALPHA}\\d]*"
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# abs_path = "/" path_segments
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ret[:ABS_PATH] = abs_path = "/#{path_segments}"
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# rel_path = rel_segment [ abs_path ]
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ret[:REL_PATH] = rel_path = "#{rel_segment}(?:#{abs_path})?"
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# net_path = "//" authority [ abs_path ]
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ret[:NET_PATH] = net_path = "//#{authority}(?:#{abs_path})?"
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# hier_part = ( net_path | abs_path ) [ "?" query ]
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ret[:HIER_PART] = hier_part = "(?:#{net_path}|#{abs_path})(?:\\?(?:#{query}))?"
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# opaque_part = uric_no_slash *uric
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ret[:OPAQUE_PART] = opaque_part = "#{uric_no_slash}#{uric}*"
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# absoluteURI = scheme ":" ( hier_part | opaque_part )
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ret[:ABS_URI] = abs_uri = "#{scheme}:(?:#{hier_part}|#{opaque_part})"
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# relativeURI = ( net_path | abs_path | rel_path ) [ "?" query ]
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ret[:REL_URI] = rel_uri = "(?:#{net_path}|#{abs_path}|#{rel_path})(?:\\?#{query})?"
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# URI-reference = [ absoluteURI | relativeURI ] [ "#" fragment ]
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ret[:URI_REF] = "(?:#{abs_uri}|#{rel_uri})?(?:##{fragment})?"
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ret[:X_ABS_URI] = "
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(#{scheme}): (?# 1: scheme)
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(?:
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(#{opaque_part}) (?# 2: opaque)
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(?:(?:
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//(?:
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(?:(?:(#{userinfo})@)? (?# 3: userinfo)
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(?:(#{host})(?::(\\d*))?))? (?# 4: host, 5: port)
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(#{reg_name}) (?# 6: registry)
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)
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(?!//)) (?# XXX: '//' is the mark for hostport)
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(#{abs_path})? (?# 7: path)
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)(?:\\?(#{query}))? (?# 8: query)
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)
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(?:\\#(#{fragment}))? (?# 9: fragment)
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"
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ret[:X_REL_URI] = "
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(?:
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(?:
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//
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(?:
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(?:(#{userinfo})@)? (?# 1: userinfo)
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(#{host})?(?::(\\d*))? (?# 2: host, 3: port)
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|
|
|
(#{reg_name}) (?# 4: registry)
|
|
)
|
|
)
|
|
|
|
|
(#{rel_segment}) (?# 5: rel_segment)
|
|
)?
|
|
(#{abs_path})? (?# 6: abs_path)
|
|
(?:\\?(#{query}))? (?# 7: query)
|
|
(?:\\#(#{fragment}))? (?# 8: fragment)
|
|
"
|
|
|
|
ret
|
|
end
|
|
|
|
# Constructs the default Hash of Regexp's.
|
|
def initialize_regexp(pattern)
|
|
ret = {}
|
|
|
|
# for URI::split
|
|
ret[:ABS_URI] = Regexp.new('\A\s*' + pattern[:X_ABS_URI] + '\s*\z', Regexp::EXTENDED)
|
|
ret[:REL_URI] = Regexp.new('\A\s*' + pattern[:X_REL_URI] + '\s*\z', Regexp::EXTENDED)
|
|
|
|
# for URI::extract
|
|
ret[:URI_REF] = Regexp.new(pattern[:URI_REF])
|
|
ret[:ABS_URI_REF] = Regexp.new(pattern[:X_ABS_URI], Regexp::EXTENDED)
|
|
ret[:REL_URI_REF] = Regexp.new(pattern[:X_REL_URI], Regexp::EXTENDED)
|
|
|
|
# for URI::escape/unescape
|
|
ret[:ESCAPED] = Regexp.new(pattern[:ESCAPED])
|
|
ret[:UNSAFE] = Regexp.new("[^#{pattern[:UNRESERVED]}#{pattern[:RESERVED]}]")
|
|
|
|
# for Generic#initialize
|
|
ret[:SCHEME] = Regexp.new("\\A#{pattern[:SCHEME]}\\z")
|
|
ret[:USERINFO] = Regexp.new("\\A#{pattern[:USERINFO]}\\z")
|
|
ret[:HOST] = Regexp.new("\\A#{pattern[:HOST]}\\z")
|
|
ret[:PORT] = Regexp.new("\\A#{pattern[:PORT]}\\z")
|
|
ret[:OPAQUE] = Regexp.new("\\A#{pattern[:OPAQUE_PART]}\\z")
|
|
ret[:REGISTRY] = Regexp.new("\\A#{pattern[:REG_NAME]}\\z")
|
|
ret[:ABS_PATH] = Regexp.new("\\A#{pattern[:ABS_PATH]}\\z")
|
|
ret[:REL_PATH] = Regexp.new("\\A#{pattern[:REL_PATH]}\\z")
|
|
ret[:QUERY] = Regexp.new("\\A#{pattern[:QUERY]}\\z")
|
|
ret[:FRAGMENT] = Regexp.new("\\A#{pattern[:FRAGMENT]}\\z")
|
|
|
|
ret
|
|
end
|
|
|
|
def convert_to_uri(uri)
|
|
if uri.is_a?(URI::Generic)
|
|
uri
|
|
elsif uri = String.try_convert(uri)
|
|
parse(uri)
|
|
else
|
|
raise ArgumentError,
|
|
"bad argument (expected URI object or URI string)"
|
|
end
|
|
end
|
|
|
|
end # class Parser
|
|
end # module URI
|