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# Copyright (c) 2004, 2005, 2006 Tanaka Akira. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
# 3. The name of the author may not be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
# EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
# IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
# OF SUCH DAMAGE.
require 'uri'
class WebApp
# :stopdoc:
class URIGen
def initialize(scheme, server_name, server_port, script_name, path_info)
@scheme = scheme
@server_name = server_name
@server_port = server_port
@script_name = script_name
@path_info = path_info
uri = "#{scheme}://#{server_name}:#{server_port}"
uri << script_name.gsub(%r{[^/]+}) {|segment| pchar_escape(segment) }
# xxx: path_info may begin with a non-slash character.
uri << path_info.gsub(%r{[^/]+}) {|segment| pchar_escape(segment) }
@base_uri = URI.parse(uri)
end
attr_reader :base_uri
def make_relative_uri(hash)
script = nil
path_info = nil
query = nil
fragment = nil
hash.each_pair {|k,v|
case k
when :script then script = v
when :path_info then path_info = v
when :query then query = v
when :fragment then fragment = v
else
raise ArgumentError, "unexpected: #{k} => #{v}"
end
}
if !script
script = @script_name
elsif %r{\A/} !~ script
script = @script_name.sub(%r{[^/]*\z}) { script }
while script.sub!(%r{/[^/]*/\.\.(?=/|\z)}, '')
end
script.sub!(%r{\A/\.\.(?=/|\z)}, '')
end
path_info = '/' + path_info if %r{\A[^/]} =~ path_info
dst = "#{script}#{path_info}"
dst.sub!(%r{\A/}, '')
dst.sub!(%r{[^/]*\z}, '')
dst_basename = $&
src = "#{@script_name}#{@path_info}"
src.sub!(%r{\A/}, '')
src.sub!(%r{[^/]*\z}, '')
while src[%r{\A[^/]*/}] == dst[%r{\A[^/]*/}]
if $~
src.sub!(%r{\A[^/]*/}, '')
dst.sub!(%r{\A[^/]*/}, '')
else
break
end
end
rel_path = '../' * src.count('/')
rel_path << dst << dst_basename
rel_path = './' if rel_path.empty?
rel_path.gsub!(%r{[^/]+}) {|segment| pchar_escape(segment) }
if %r{\A/} =~ rel_path ||
/:/ =~ rel_path[%r{\A[^/]*}] # It seems absolute URI.
rel_path = './' + rel_path
end
if query
case query
when QueryString
query = query.instance_eval { @escaped_query_string }
when Hash
query = query.map {|k, v|
case v
when String
"#{form_key_value_escape(k)}=#{form_key_value_escape(v)}"
when Array
v.map {|e|
unless String === e
raise ArgumentError, "unexpected query value: #{e.inspect}"
end
"#{form_key_value_escape(k)}=#{form_key_value_escape(e)}"
}
else
raise ArgumentError, "unexpected query value: #{v.inspect}"
end
}.join(';')
else
raise ArgumentError, "unexpected query: #{query.inspect}"
end
unless query.empty?
query = '?' + query
end
else
query = ''
end
if fragment
fragment = "#" + fragment_escape(fragment)
else
fragment = ''
end
URI.parse(rel_path + query + fragment)
end
def make_absolute_uri(hash)
@base_uri + make_relative_uri(hash)
end
# RFC 3986
Alpha = 'a-zA-Z'
Digit = '0-9'
UnreservedChars = Alpha + Digit + '\-._~'
SubDelimChars = '!$&\'()*+,;='
PChars = UnreservedChars + SubDelimChars + ":@"
FragmentChars = PChars + "/?"
def fragment_escape(s)
s.gsub(/[^#{FragmentChars}]/on) {|c| sprintf("%%%02X", c[0]) }
end
QueryChars = PChars + "/?"
# [;&=+] is used for delimiter of application/x-www-form-urlencoded.
FormKeyValueChars = QueryChars.gsub(/[;&=+]/, '') + ' '
def form_key_value_escape(s)
s.gsub(/[^#{FormKeyValueChars}]/on) {|c|
sprintf("%%%02X", c[0])
}.gsub(/ /on, '+')
end
#
# RFC 2396
AlphaNum = Alpha + Digit
Mark = '\-_.!~*\'()'
Unreserved = AlphaNum + Mark
PChar = Unreserved + ':@&=+$,'
def pchar_escape(s)
s.gsub(/[^#{PChar}]/on) {|c| sprintf("%%%02X", c[0]) }
end
end
# :startdoc:
end
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