Class: Hobix::WebApp::URIGen

Inherits:
Object
  • Object
show all
Defined in:
lib/hobix/webapp/urigen.rb

Overview

:stopdoc:

Constant Summary collapse

Alpha = 
'a-zA-Z'
Digit = 
'0-9'
AlphaNum = 
Alpha + Digit
Mark = 
'\-_.!~*\'()'
Unreserved = 
AlphaNum + Mark
PChar = 
Unreserved + ':@&=+$,'
Reserved = 
';/?:@&=+$,'
Uric = 
Reserved + Unreserved

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(scheme, server_name, server_port, script_name, path_info) ⇒ URIGen

Returns a new instance of URIGen.



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# File 'lib/hobix/webapp/urigen.rb', line 7

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) }
  uri << path_info.gsub(%r{[^/]+}) {|segment| pchar_escape(segment) }
  @base_uri = URI.parse(uri)
end

Instance Attribute Details

#base_uri ⇒ Object (readonly)

Returns the value of attribute base_uri.



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# File 'lib/hobix/webapp/urigen.rb', line 18

def base_uri
  @base_uri
end

Instance Method Details

#form_escape(s) ⇒ Object 



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# File 'lib/hobix/webapp/urigen.rb', line 133

def form_escape(s)
  s.gsub(/[#{Reserved}\x00-\x1f\x7f-\xff]/on) {|c|
    sprintf("%%%02X", c[0])
  }.gsub(/ /on) { '+' }
end

#make_absolute_uri(hash) ⇒ Object 



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# File 'lib/hobix/webapp/urigen.rb', line 113

def make_absolute_uri(hash)
  @base_uri + make_relative_uri(hash)
end

#make_relative_uri(hash) ⇒ Object 



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# File 'lib/hobix/webapp/urigen.rb', line 20

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 /\A[A-Za-z][A-Za-z0-9+\-.]*:/ =~ rel_path # It seems absolute URI.
    rel_path.sub!(/:/, '%3A')
  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_escape(k)}=#{form_escape(v)}"
        when Array
          v.map {|e|
            unless String === e
              raise ArgumentError, "unexpected query value: #{e.inspect}"
            end
            "#{form_escape(k)}=#{form_escape(e)}"
          }
        else
          raise ArgumentError, "unexpected query value: #{v.inspect}"
        end
      }.join(';')
    else
      raise ArgumentError, "unexpected query: #{query.inspect}"
    end
    unless query.empty?
      query = '?' + uric_escape(query)
    end
  else
    query = ''
  end

  if fragment
    fragment = "#" + uric_escape(fragment)
  else
    fragment = ''
  end

  URI.parse(rel_path + query + fragment)
end

#pchar_escape(s) ⇒ Object 



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# File 'lib/hobix/webapp/urigen.rb', line 123

def pchar_escape(s)
  s.gsub(/[^#{PChar}]/on) {|c| sprintf("%%%02X", c[0]) }
end

#uric_escape(s) ⇒ Object 



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# File 'lib/hobix/webapp/urigen.rb', line 129

def uric_escape(s)
  s.gsub(/[^#{Uric}]/on) {|c| sprintf("%%%02X", c[0]) }
end