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require 'tempfile'
require 'stringio'
require 'strscan'
module ActionController
# HTTP methods which are accepted by default.
ACCEPTED_HTTP_METHODS = Set.new(%w( get head put post delete options ))
# CgiRequest and TestRequest provide concrete implementations.
class AbstractRequest
cattr_accessor :relative_url_root
remove_method :relative_url_root
# The hash of environment variables for this request,
# such as { 'RAILS_ENV' => 'production' }.
attr_reader :env
# The true HTTP request method as a lowercase symbol, such as :get.
# UnknownHttpMethod is raised for invalid methods not listed in ACCEPTED_HTTP_METHODS.
def request_method
@request_method ||= begin
method = ((@env['REQUEST_METHOD'] == 'POST' && !parameters[:_method].blank?) ? parameters[:_method].to_s : @env['REQUEST_METHOD']).downcase
if ACCEPTED_HTTP_METHODS.include?(method)
method.to_sym
else
raise UnknownHttpMethod, "#{method}, accepted HTTP methods are #{ACCEPTED_HTTP_METHODS.to_a.to_sentence}"
end
end
end
# The HTTP request method as a lowercase symbol, such as :get.
# Note, HEAD is returned as :get since the two are functionally
# equivalent from the application's perspective.
def method
request_method == :head ? :get : request_method
end
# Is this a GET (or HEAD) request? Equivalent to request.method == :get
def get?
method == :get
end
# Is this a POST request? Equivalent to request.method == :post
def post?
request_method == :post
end
# Is this a PUT request? Equivalent to request.method == :put
def put?
request_method == :put
end
# Is this a DELETE request? Equivalent to request.method == :delete
def delete?
request_method == :delete
end
# Is this a HEAD request? request.method sees HEAD as :get, so check the
# HTTP method directly.
def head?
request_method == :head
end
# Provides acccess to the request's HTTP headers, for example:
# request.headers["Content-Type"] # => "text/plain"
def headers
@headers ||= ActionController::Http::Headers.new(@env)
end
def content_length
@content_length ||= env['CONTENT_LENGTH'].to_i
end
# The MIME type of the HTTP request, such as Mime::XML.
#
# For backward compatibility, the post format is extracted from the
# X-Post-Data-Format HTTP header if present.
def content_type
@content_type ||= Mime::Type.lookup(content_type_without_parameters)
end
# Returns the accepted MIME type for the request
def accepts
@accepts ||=
if @env['HTTP_ACCEPT'].to_s.strip.empty?
[ content_type, Mime::ALL ].compact # make sure content_type being nil is not included
else
Mime::Type.parse(@env['HTTP_ACCEPT'])
end
end
# Returns the Mime type for the format used in the request. If there is no format available, the first of the
# accept types will be used. Examples:
#
# GET /posts/5.xml | request.format => Mime::XML
# GET /posts/5.xhtml | request.format => Mime::HTML
# GET /posts/5 | request.format => request.accepts.first (usually Mime::HTML for browsers)
def format
@format ||= parameters[:format] ? Mime::Type.lookup_by_extension(parameters[:format]) : accepts.first
end
# Sets the format by string extension, which can be used to force custom formats that are not controlled by the extension.
# Example:
#
# class ApplicationController < ActionController::Base
# before_filter :adjust_format_for_iphone
#
# private
# def adjust_format_for_iphone
# request.format = :iphone if request.env["HTTP_USER_AGENT"][/iPhone/]
# end
# end
def format=(extension)
parameters[:format] = extension.to_s
@format = Mime::Type.lookup_by_extension(parameters[:format])
end
# Returns true if the request's "X-Requested-With" header contains
# "XMLHttpRequest". (The Prototype Javascript library sends this header with
# every Ajax request.)
def xml_http_request?
!(@env['HTTP_X_REQUESTED_WITH'] !~ /XMLHttpRequest/i)
end
alias xhr? :xml_http_request?
# Determine originating IP address. REMOTE_ADDR is the standard
# but will fail if the user is behind a proxy. HTTP_CLIENT_IP and/or
# HTTP_X_FORWARDED_FOR are set by proxies so check for these before
# falling back to REMOTE_ADDR. HTTP_X_FORWARDED_FOR may be a comma-
# delimited list in the case of multiple chained proxies; the first is
# the originating IP.
#
# Security note: do not use if IP spoofing is a concern for your
# application. Since remote_ip checks HTTP headers for addresses forwarded
# by proxies, the client may send any IP. remote_addr can't be spoofed but
# also doesn't work behind a proxy, since it's always the proxy's IP.
def remote_ip
return @env['HTTP_CLIENT_IP'] if @env.include? 'HTTP_CLIENT_IP'
if @env.include? 'HTTP_X_FORWARDED_FOR' then
remote_ips = @env['HTTP_X_FORWARDED_FOR'].split(',').reject do |ip|
ip.strip =~ /^unknown$|^(10|172\.(1[6-9]|2[0-9]|30|31)|192\.168)\./i
end
return remote_ips.first.strip unless remote_ips.empty?
end
@env['REMOTE_ADDR']
end
# Returns the lowercase name of the HTTP server software.
def server_software
(@env['SERVER_SOFTWARE'] && /^([a-zA-Z]+)/ =~ @env['SERVER_SOFTWARE']) ? $1.downcase : nil
end
# Returns the complete URL used for this request
def url
protocol + host_with_port + request_uri
end
# Return 'https://' if this is an SSL request and 'http://' otherwise.
def protocol
ssl? ? 'https://' : 'http://'
end
# Is this an SSL request?
def ssl?
@env['HTTPS'] == 'on' || @env['HTTP_X_FORWARDED_PROTO'] == 'https'
end
# Returns the host for this request, such as example.com.
def host
end
# Returns a host:port string for this request, such as example.com or
# example.com:8080.
def host_with_port
@host_with_port ||= host + port_string
end
# Returns the port number of this request as an integer.
def port
@port_as_int ||= @env['SERVER_PORT'].to_i
end
# Returns the standard port number for this request's protocol
def standard_port
case protocol
when 'https://' then 443
else 80
end
end
# Returns a port suffix like ":8080" if the port number of this request
# is not the default HTTP port 80 or HTTPS port 443.
def port_string
(port == standard_port) ? '' : ":#{port}"
end
# Returns the domain part of a host, such as rubyonrails.org in "www.rubyonrails.org". You can specify
# a different <tt>tld_length</tt>, such as 2 to catch rubyonrails.co.uk in "www.rubyonrails.co.uk".
def domain(tld_length = 1)
return nil unless named_host?(host)
host.split('.').last(1 + tld_length).join('.')
end
# Returns all the subdomains as an array, so ["dev", "www"] would be returned for "dev.www.rubyonrails.org".
# You can specify a different <tt>tld_length</tt>, such as 2 to catch ["www"] instead of ["www", "rubyonrails"]
# in "www.rubyonrails.co.uk".
def subdomains(tld_length = 1)
return [] unless named_host?(host)
parts = host.split('.')
parts[0..-(tld_length+2)]
end
# Return the query string, accounting for server idiosyncracies.
def query_string
if uri = @env['REQUEST_URI']
uri.split('?', 2)[1] || ''
else
@env['QUERY_STRING'] || ''
end
end
# Return the request URI, accounting for server idiosyncracies.
# WEBrick includes the full URL. IIS leaves REQUEST_URI blank.
def request_uri
if uri = @env['REQUEST_URI']
# Remove domain, which webrick puts into the request_uri.
(%r{^\w+\://[^/]+(/.*|$)$} =~ uri) ? $1 : uri
else
# Construct IIS missing REQUEST_URI from SCRIPT_NAME and PATH_INFO.
script_filename = @env['SCRIPT_NAME'].to_s.match(%r{[^/]+$})
uri = @env['PATH_INFO']
uri = uri.sub(/#{script_filename}\//, '') unless script_filename.nil?
unless (env_qs = @env['QUERY_STRING']).nil? || env_qs.empty?
uri << '?' << env_qs
end
if uri.nil?
@env.delete('REQUEST_URI')
uri
else
@env['REQUEST_URI'] = uri
end
end
end
# Returns the interpreted path to requested resource after all the installation directory of this application was taken into account
def path
path = (uri = request_uri) ? uri.split('?').first.to_s : ''
# Cut off the path to the installation directory if given
path.sub!(%r/^#{relative_url_root}/, '')
path || ''
end
# Returns the path minus the web server relative installation directory.
# This can be set with the environment variable RAILS_RELATIVE_URL_ROOT.
# It can be automatically extracted for Apache setups. If the server is not
# Apache, this method returns an empty string.
def relative_url_root
@@relative_url_root ||= case
when @env["RAILS_RELATIVE_URL_ROOT"]
@env["RAILS_RELATIVE_URL_ROOT"]
when server_software == 'apache'
@env["SCRIPT_NAME"].to_s.sub(/\/dispatch\.(fcgi|rb|cgi)$/, '')
else
''
end
end
# Read the request body. This is useful for web services that need to
# work with raw requests directly.
def raw_post
unless env.include? 'RAW_POST_DATA'
env['RAW_POST_DATA'] = body.read(content_length)
body.rewind if body.respond_to?(:rewind)
end
env['RAW_POST_DATA']
end
# Returns both GET and POST parameters in a single hash.
def parameters
@parameters ||= request_parameters.merge(query_parameters).update(path_parameters).with_indifferent_access
end
def path_parameters=(parameters) #:nodoc:
@path_parameters = parameters
@symbolized_path_parameters = @parameters = nil
end
# The same as <tt>path_parameters</tt> with explicitly symbolized keys
def symbolized_path_parameters
@symbolized_path_parameters ||= path_parameters.symbolize_keys
end
# Returns a hash with the parameters used to form the path of the request.
# Returned hash keys are strings. See <tt>symbolized_path_parameters</tt> for symbolized keys.
#
# Example:
#
# {'action' => 'my_action', 'controller' => 'my_controller'}
def path_parameters
@path_parameters ||= {}
end
#--
# Must be implemented in the concrete request
#++
# The request body is an IO input stream.
def body
end
def query_parameters #:nodoc:
end
def request_parameters #:nodoc:
end
def cookies #:nodoc:
end
def session #:nodoc:
end
def session=(session) #:nodoc:
@session = session
end
def reset_session #:nodoc:
end
protected
# The raw content type string. Use when you need parameters such as
# charset or boundary which aren't included in the content_type MIME type.
# Overridden by the X-POST_DATA_FORMAT header for backward compatibility.
def content_type_with_parameters
content_type_from_legacy_post_data_format_header ||
env['CONTENT_TYPE'].to_s
end
# The raw content type string with its parameters stripped off.
def content_type_without_parameters
@content_type_without_parameters ||= self.class.extract_content_type_without_parameters(content_type_with_parameters)
end
private
def content_type_from_legacy_post_data_format_header
if x_post_format = @env['HTTP_X_POST_DATA_FORMAT']
case x_post_format.to_s.downcase
when 'yaml'; 'application/x-yaml'
when 'xml'; 'application/xml'
end
end
end
def parse_formatted_request_parameters
return {} if content_length.zero?
content_type, boundary = self.class.extract_multipart_boundary(content_type_with_parameters)
# Don't parse params for unknown requests.
return {} if content_type.blank?
mime_type = Mime::Type.lookup(content_type)
strategy = ActionController::Base.param_parsers[mime_type]
# Only multipart form parsing expects a stream.
body = (strategy && strategy != :multipart_form) ? raw_post : self.body
case strategy
when Proc
strategy.call(body)
when :url_encoded_form
self.class.clean_up_ajax_request_body! body
self.class.parse_query_parameters(body)
when :multipart_form
self.class.parse_multipart_form_parameters(body, boundary, content_length, env)
when :xml_simple, :xml_node
body.blank? ? {} : Hash.from_xml(body).with_indifferent_access
when :yaml
YAML.load(body)
else
{}
end
rescue Exception => e # YAML, XML or Ruby code block errors
raise
{ "body" => body,
"content_type" => content_type_with_parameters,
"content_length" => content_length,
"exception" => "#{e.message} (#{e.class})",
"backtrace" => e.backtrace }
end
def named_host?(host)
!(host.nil? || /\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/.match(host))
end
class << self
def parse_query_parameters(query_string)
return {} if query_string.blank?
pairs = query_string.split('&').collect do |chunk|
next if chunk.empty?
key, value = chunk.split('=', 2)
next if key.empty?
value = value.nil? ? nil : CGI.unescape(value)
[ CGI.unescape(key), value ]
end.compact
UrlEncodedPairParser.new(pairs).result
end
def parse_request_parameters(params)
parser = UrlEncodedPairParser.new
params = params.dup
until params.empty?
for key, value in params
if key.blank?
params.delete key
elsif !key.include?('[')
# much faster to test for the most common case first (GET)
# and avoid the call to build_deep_hash
parser.result[key] = get_typed_value(value[0])
params.delete key
elsif value.is_a?(Array)
parser.parse(key, get_typed_value(value.shift))
params.delete key if value.empty?
else
raise TypeError, "Expected array, found #{value.inspect}"
end
end
end
parser.result
end
def parse_multipart_form_parameters(body, boundary, content_length, env)
parse_request_parameters(read_multipart(body, boundary, content_length, env))
end
def extract_multipart_boundary(content_type_with_parameters)
if content_type_with_parameters =~ MULTIPART_BOUNDARY
['multipart/form-data', $1.dup]
else
extract_content_type_without_parameters(content_type_with_parameters)
end
end
def extract_content_type_without_parameters(content_type_with_parameters)
$1.strip.downcase if content_type_with_parameters =~ /^([^,\;]*)/
end
def clean_up_ajax_request_body!(body)
body.chop! if body[-1] == 0
body.gsub!(/&_=$/, '')
end
private
def get_typed_value(value)
case value
when String
value
when NilClass
''
when Array
value.map { |v| get_typed_value(v) }
else
if value.respond_to? :original_filename
# Uploaded file
if value.original_filename
value
# Multipart param
else
result = value.read
value.rewind
result
end
# Unknown value, neither string nor multipart.
else
raise "Unknown form value: #{value.inspect}"
end
end
end
MULTIPART_BOUNDARY = %r|\Amultipart/form-data.*boundary=\"?([^\";,]+)\"?|n
EOL = "\015\012"
def read_multipart(body, boundary, content_length, env)
params = Hash.new([])
boundary = "--" + boundary
quoted_boundary = Regexp.quote(boundary)
buf = ""
bufsize = 10 * 1024
boundary_end=""
# start multipart/form-data
body.binmode if defined? body.binmode
boundary_size = boundary.size + EOL.size
content_length -= boundary_size
status = body.read(boundary_size)
if nil == status
raise EOFError, "no content body"
elsif boundary + EOL != status
raise EOFError, "bad content body"
end
loop do
head = nil
content =
if 10240 < content_length
UploadedTempfile.new("CGI")
else
UploadedStringIO.new
end
content.binmode if defined? content.binmode
until head and /#{quoted_boundary}(?:#{EOL}|--)/n.match(buf)
if (not head) and /#{EOL}#{EOL}/n.match(buf)
buf = buf.sub(/\A((?:.|\n)*?#{EOL})#{EOL}/n) do
head = $1.dup
""
end
next
end
if head and ( (EOL + boundary + EOL).size < buf.size )
content.print buf[0 ... (buf.size - (EOL + boundary + EOL).size)]
buf[0 ... (buf.size - (EOL + boundary + EOL).size)] = ""
end
c = if bufsize < content_length
body.read(bufsize)
else
body.read(content_length)
end
if c.nil? || c.empty?
raise EOFError, "bad content body"
end
buf.concat(c)
content_length -= c.size
end
buf = buf.sub(/\A((?:.|\n)*?)(?:[\r\n]{1,2})?#{quoted_boundary}([\r\n]{1,2}|--)/n) do
content.print $1
if "--" == $2
content_length = -1
end
boundary_end = $2.dup
""
end
content.rewind
head =~ /Content-Disposition:.* filename=(?:"((?:\\.|[^\"])*)"|([^;]*))/ni
if filename = $1 || $2
if /Mac/ni.match(env['HTTP_USER_AGENT']) and
/Mozilla/ni.match(env['HTTP_USER_AGENT']) and
(not /MSIE/ni.match(env['HTTP_USER_AGENT']))
filename = CGI.unescape(filename)
end
content.original_path = filename.dup
end
head =~ /Content-Type: ([^\r]*)/ni
content.content_type = $1.dup if $1
head =~ /Content-Disposition:.* name="?([^\";]*)"?/ni
name = $1.dup if $1
if params.has_key?(name)
params[name].push(content)
else
params[name] = [content]
end
break if buf.size == 0
break if content_length == -1
end
raise EOFError, "bad boundary end of body part" unless boundary_end=~/--/
begin
body.rewind if body.respond_to?(:rewind)
rescue Errno::ESPIPE
# Handles exceptions raised by input streams that cannot be rewound
# such as when using plain CGI under Apache
end
params
end
end
end
class UrlEncodedPairParser < StringScanner #:nodoc:
attr_reader :top, :parent, :result
def initialize(pairs = [])
super('')
@result = {}
pairs.each { |key, value| parse(key, value) }
end
KEY_REGEXP = %r{([^\[\]=&]+)}
BRACKETED_KEY_REGEXP = %r{\[([^\[\]=&]+)\]}
# Parse the query string
def parse(key, value)
self.string = key
@top, @parent = result, nil
# First scan the bare key
key = scan(KEY_REGEXP) or return
key = post_key_check(key)
# Then scan as many nestings as present
until eos?
r = scan(BRACKETED_KEY_REGEXP) or return
key = self[1]
key = post_key_check(key)
end
bind(key, value)
end
private
# After we see a key, we must look ahead to determine our next action. Cases:
#
# [] follows the key. Then the value must be an array.
# = follows the key. (A value comes next)
# & or the end of string follows the key. Then the key is a flag.
# otherwise, a hash follows the key.
def post_key_check(key)
if scan(/\[\]/) # a[b][] indicates that b is an array
container(key, Array)
nil
elsif check(/\[[^\]]/) # a[b] indicates that a is a hash
container(key, Hash)
nil
else # End of key? We do nothing.
key
end
end
# Add a container to the stack.
def container(key, klass)
type_conflict! klass, top[key] if top.is_a?(Hash) && top.key?(key) && ! top[key].is_a?(klass)
value = bind(key, klass.new)
type_conflict! klass, value unless value.is_a?(klass)
push(value)
end
# Push a value onto the 'stack', which is actually only the top 2 items.
def push(value)
@parent, @top = @top, value
end
# Bind a key (which may be nil for items in an array) to the provided value.
def bind(key, value)
if top.is_a? Array
if key
if top[-1].is_a?(Hash) && ! top[-1].key?(key)
top[-1][key] = value
else
top << {key => value}.with_indifferent_access
push top.last
end
else
top << value
end
elsif top.is_a? Hash
key = CGI.unescape(key)
parent << (@top = {}) if top.key?(key) && parent.is_a?(Array)
return top[key] ||= value
else
raise ArgumentError, "Don't know what to do: top is #{top.inspect}"
end
return value
end
def type_conflict!(klass, value)
raise TypeError, "Conflicting types for parameter containers. Expected an instance of #{klass} but found an instance of #{value.class}. This can be caused by colliding Array and Hash parameters like qs[]=value&qs[key]=value."
end
end
module UploadedFile
def self.included(base)
base.class_eval do
attr_accessor :original_path, :content_type
alias_method :local_path, :path
end
end
# Take the basename of the upload's original filename.
# This handles the full Windows paths given by Internet Explorer
# (and perhaps other broken user agents) without affecting
# those which give the lone filename.
# The Windows regexp is adapted from Perl's File::Basename.
def original_filename
unless defined? @original_filename
@original_filename =
unless original_path.blank?
if original_path =~ /^(?:.*[:\\\/])?(.*)/m
$1
else
File.basename original_path
end
end
end
@original_filename
end
end
class UploadedStringIO < StringIO
include UploadedFile
end
class UploadedTempfile < Tempfile
include UploadedFile
end
end
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