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ruby--ruby/lib/cgi/core.rb
xibbar 09814e38e1 * lib/cgi/core.rb (CGI::parse): performance improvement 
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@19343 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2008-09-14 13:10:43 +00:00

705 lines
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class CGI
# :stopdoc:
# String for carriage return
CR = "\015"
# String for linefeed
LF = "\012"
# Standard internet newline sequence
EOL = CR + LF
REVISION = '$Id$' #:nodoc:
NEEDS_BINMODE = true if /WIN/i.match(RUBY_PLATFORM)
# Path separators in different environments.
PATH_SEPARATOR = {'UNIX'=>'/', 'WINDOWS'=>'\\', 'MACINTOSH'=>':'}
# HTTP status codes.
HTTP_STATUS = {
"OK" => "200 OK",
"PARTIAL_CONTENT" => "206 Partial Content",
"MULTIPLE_CHOICES" => "300 Multiple Choices",
"MOVED" => "301 Moved Permanently",
"REDIRECT" => "302 Found",
"NOT_MODIFIED" => "304 Not Modified",
"BAD_REQUEST" => "400 Bad Request",
"AUTH_REQUIRED" => "401 Authorization Required",
"FORBIDDEN" => "403 Forbidden",
"NOT_FOUND" => "404 Not Found",
"METHOD_NOT_ALLOWED" => "405 Method Not Allowed",
"NOT_ACCEPTABLE" => "406 Not Acceptable",
"LENGTH_REQUIRED" => "411 Length Required",
"PRECONDITION_FAILED" => "412 Rrecondition Failed",
"SERVER_ERROR" => "500 Internal Server Error",
"NOT_IMPLEMENTED" => "501 Method Not Implemented",
"BAD_GATEWAY" => "502 Bad Gateway",
"VARIANT_ALSO_VARIES" => "506 Variant Also Negotiates"
}
# Abbreviated day-of-week names specified by RFC 822
RFC822_DAYS = %w[ Sun Mon Tue Wed Thu Fri Sat ]
# Abbreviated month names specified by RFC 822
RFC822_MONTHS = %w[ Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ]
# :startdoc:
def env_table
ENV
end
def stdinput
$stdin
end
def stdoutput
$stdout
end
private :env_table, :stdinput, :stdoutput
# Create an HTTP header block as a string.
#
# Includes the empty line that ends the header block.
#
# +options+ can be a string specifying the Content-Type (defaults
# to text/html), or a hash of header key/value pairs. The following
# header keys are recognized:
#
# type:: the Content-Type header. Defaults to "text/html"
# charset:: the charset of the body, appended to the Content-Type header.
# nph:: a boolean value. If true, prepend protocol string and status code, and
# date; and sets default values for "server" and "connection" if not
# explicitly set.
# status:: the HTTP status code, returned as the Status header. See the
# list of available status codes below.
# server:: the server software, returned as the Server header.
# connection:: the connection type, returned as the Connection header (for
# instance, "close".
# length:: the length of the content that will be sent, returned as the
# Content-Length header.
# language:: the language of the content, returned as the Content-Language
# header.
# expires:: the time on which the current content expires, as a +Time+
# object, returned as the Expires header.
# cookie:: a cookie or cookies, returned as one or more Set-Cookie headers.
# The value can be the literal string of the cookie; a CGI::Cookie
# object; an Array of literal cookie strings or Cookie objects; or a
# hash all of whose values are literal cookie strings or Cookie objects.
# These cookies are in addition to the cookies held in the
# @output_cookies field.
#
# Other header lines can also be set; they are appended as key: value.
#
# header
# # Content-Type: text/html
#
# header("text/plain")
# # Content-Type: text/plain
#
# header("nph" => true,
# "status" => "OK", # == "200 OK"
# # "status" => "200 GOOD",
# "server" => ENV['SERVER_SOFTWARE'],
# "connection" => "close",
# "type" => "text/html",
# "charset" => "iso-2022-jp",
# # Content-Type: text/html; charset=iso-2022-jp
# "length" => 103,
# "language" => "ja",
# "expires" => Time.now + 30,
# "cookie" => [cookie1, cookie2],
# "my_header1" => "my_value"
# "my_header2" => "my_value")
#
# The status codes are:
#
# "OK" --> "200 OK"
# "PARTIAL_CONTENT" --> "206 Partial Content"
# "MULTIPLE_CHOICES" --> "300 Multiple Choices"
# "MOVED" --> "301 Moved Permanently"
# "REDIRECT" --> "302 Found"
# "NOT_MODIFIED" --> "304 Not Modified"
# "BAD_REQUEST" --> "400 Bad Request"
# "AUTH_REQUIRED" --> "401 Authorization Required"
# "FORBIDDEN" --> "403 Forbidden"
# "NOT_FOUND" --> "404 Not Found"
# "METHOD_NOT_ALLOWED" --> "405 Method Not Allowed"
# "NOT_ACCEPTABLE" --> "406 Not Acceptable"
# "LENGTH_REQUIRED" --> "411 Length Required"
# "PRECONDITION_FAILED" --> "412 Precondition Failed"
# "SERVER_ERROR" --> "500 Internal Server Error"
# "NOT_IMPLEMENTED" --> "501 Method Not Implemented"
# "BAD_GATEWAY" --> "502 Bad Gateway"
# "VARIANT_ALSO_VARIES" --> "506 Variant Also Negotiates"
#
# This method does not perform charset conversion.
#
def header(options = "text/html")
buf = ""
case options
when String
options = { "type" => options }
when Hash
options = options.dup
end
unless options.has_key?("type")
options["type"] = "text/html"
end
if options.has_key?("charset")
options["type"] += "; charset=" + options.delete("charset")
end
options.delete("nph") if defined?(MOD_RUBY)
if options.delete("nph") or
(/IIS\/(\d+)/.match(env_table['SERVER_SOFTWARE']) and $1.to_i < 5)
buf += (env_table["SERVER_PROTOCOL"] or "HTTP/1.0") + " " +
(HTTP_STATUS[options["status"]] or options["status"] or "200 OK") +
EOL +
"Date: " + CGI::rfc1123_date(Time.now) + EOL
unless options.has_key?("server")
options["server"] = (env_table['SERVER_SOFTWARE'] or "")
end
unless options.has_key?("connection")
options["connection"] = "close"
end
options.delete("status")
end
if options.has_key?("status")
buf += "Status: " +
(HTTP_STATUS[options["status"]] or options["status"]) + EOL
options.delete("status")
end
if options.has_key?("server")
buf += "Server: " + options.delete("server") + EOL
end
if options.has_key?("connection")
buf += "Connection: " + options.delete("connection") + EOL
end
buf += "Content-Type: " + options.delete("type") + EOL
if options.has_key?("length")
buf += "Content-Length: " + options.delete("length").to_s + EOL
end
if options.has_key?("language")
buf += "Content-Language: " + options.delete("language") + EOL
end
if options.has_key?("expires")
buf += "Expires: " + CGI::rfc1123_date( options.delete("expires") ) + EOL
end
if options.has_key?("cookie")
if options["cookie"].kind_of?(String) or
options["cookie"].kind_of?(Cookie)
buf += "Set-Cookie: " + options.delete("cookie").to_s + EOL
elsif options["cookie"].kind_of?(Array)
options.delete("cookie").each{|cookie|
buf += "Set-Cookie: " + cookie.to_s + EOL
}
elsif options["cookie"].kind_of?(Hash)
options.delete("cookie").each_value{|cookie|
buf += "Set-Cookie: " + cookie.to_s + EOL
}
end
end
if @output_cookies
for cookie in @output_cookies
buf += "Set-Cookie: " + cookie.to_s + EOL
end
end
options.each{|key, value|
buf += key + ": " + value.to_s + EOL
}
if defined?(MOD_RUBY)
table = Apache::request.headers_out
buf.scan(/([^:]+): (.+)#{EOL}/){ |name, value|
warn sprintf("name:%s value:%s\n", name, value) if $DEBUG
case name
when 'Set-Cookie'
table.add(name, value)
when /^status$/i
Apache::request.status_line = value
Apache::request.status = value.to_i
when /^content-type$/i
Apache::request.content_type = value
when /^content-encoding$/i
Apache::request.content_encoding = value
when /^location$/i
if Apache::request.status == 200
Apache::request.status = 302
end
Apache::request.headers_out[name] = value
else
Apache::request.headers_out[name] = value
end
}
Apache::request.send_http_header
''
else
buf + EOL
end
end # header()
# Print an HTTP header and body to $DEFAULT_OUTPUT ($>)
#
# The header is provided by +options+, as for #header().
# The body of the document is that returned by the passed-
# in block. This block takes no arguments. It is required.
#
# cgi = CGI.new
# cgi.out{ "string" }
# # Content-Type: text/html
# # Content-Length: 6
# #
# # string
#
# cgi.out("text/plain") { "string" }
# # Content-Type: text/plain
# # Content-Length: 6
# #
# # string
#
# cgi.out("nph" => true,
# "status" => "OK", # == "200 OK"
# "server" => ENV['SERVER_SOFTWARE'],
# "connection" => "close",
# "type" => "text/html",
# "charset" => "iso-2022-jp",
# # Content-Type: text/html; charset=iso-2022-jp
# "language" => "ja",
# "expires" => Time.now + (3600 * 24 * 30),
# "cookie" => [cookie1, cookie2],
# "my_header1" => "my_value",
# "my_header2" => "my_value") { "string" }
#
# Content-Length is automatically calculated from the size of
# the String returned by the content block.
#
# If ENV['REQUEST_METHOD'] == "HEAD", then only the header
# is outputted (the content block is still required, but it
# is ignored).
#
# If the charset is "iso-2022-jp" or "euc-jp" or "shift_jis" then
# the content is converted to this charset, and the language is set
# to "ja".
def out(options = "text/html") # :yield:
options = { "type" => options } if options.kind_of?(String)
content = yield
options["length"] = content.bytesize.to_s
output = stdoutput
output.binmode if defined? output.binmode
output.print header(options)
output.print content unless "HEAD" == env_table['REQUEST_METHOD']
end
# Print an argument or list of arguments to the default output stream
#
# cgi = CGI.new
# cgi.print # default: cgi.print == $DEFAULT_OUTPUT.print
def print(*options)
stdoutput.print(*options)
end
# Parse an HTTP query string into a hash of key=>value pairs.
#
# params = CGI::parse("query_string")
# # {"name1" => ["value1", "value2", ...],
# # "name2" => ["value1", "value2", ...], ... }
#
def CGI::parse(query)
params = {}
query.split(/[&;]/).each do |pairs|
key, value = pairs.split('=',2).collect{|v| CGI::unescape(v) }
params.has_key?(key) ? params[key].push(value) : params[key] = [value]
end
params.default=[].freeze
params
end
# Mixin module. It provides the follow functionality groups:
#
# 1. Access to CGI environment variables as methods. See
# documentation to the CGI class for a list of these variables.
#
# 2. Access to cookies, including the cookies attribute.
#
# 3. Access to parameters, including the params attribute, and overloading
# [] to perform parameter value lookup by key.
#
# 4. The initialize_query method, for initialising the above
# mechanisms, handling multipart forms, and allowing the
# class to be used in "offline" mode.
#
module QueryExtension
%w[ CONTENT_LENGTH SERVER_PORT ].each do |env|
define_method(env.sub(/^HTTP_/, '').downcase) do
(val = env_table[env]) && Integer(val)
end
end
%w[ AUTH_TYPE CONTENT_TYPE GATEWAY_INTERFACE PATH_INFO
PATH_TRANSLATED QUERY_STRING REMOTE_ADDR REMOTE_HOST
REMOTE_IDENT REMOTE_USER REQUEST_METHOD SCRIPT_NAME
SERVER_NAME SERVER_PROTOCOL SERVER_SOFTWARE
HTTP_ACCEPT HTTP_ACCEPT_CHARSET HTTP_ACCEPT_ENCODING
HTTP_ACCEPT_LANGUAGE HTTP_CACHE_CONTROL HTTP_FROM HTTP_HOST
HTTP_NEGOTIATE HTTP_PRAGMA HTTP_REFERER HTTP_USER_AGENT ].each do |env|
define_method(env.sub(/^HTTP_/, '').downcase) do
env_table[env]
end
end
# Get the raw cookies as a string.
def raw_cookie
env_table["HTTP_COOKIE"]
end
# Get the raw RFC2965 cookies as a string.
def raw_cookie2
env_table["HTTP_COOKIE2"]
end
# Get the cookies as a hash of cookie-name=>Cookie pairs.
attr_accessor :cookies
# Get the parameters as a hash of name=>values pairs, where
# values is an Array.
attr_reader :params
# Set all the parameters.
def params=(hash)
@params.clear
@params.update(hash)
end
def read_multipart(boundary, content_length)
params = Hash.new([])
boundary = "--" + boundary
quoted_boundary = Regexp.quote(boundary)
buf = ""
bufsize = 10 * 1024
boundary_end=""
# start multipart/form-data
stdinput.binmode if defined? stdinput.binmode
boundary_size = boundary.bytesize + EOL.bytesize
content_length -= boundary_size
status = stdinput.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
body = MorphingBody.new
until head and /#{quoted_boundary}(?:#{EOL}|--)/.match(buf)
if (not head) and /#{EOL}#{EOL}/.match(buf)
buf = buf.sub(/\A((?:.|\n)*?#{EOL})#{EOL}/) do
head = $1.dup
""
end
next
end
if head and ( (EOL + boundary + EOL).bytesize < buf.bytesize )
body.print buf[0 ... (buf.bytesize - (EOL + boundary + EOL).bytesize)]
buf[0 ... (buf.bytesize - (EOL + boundary + EOL).bytesize)] = ""
end
c = if bufsize < content_length
stdinput.read(bufsize)
else
stdinput.read(content_length)
end
if c.nil? || c.empty?
raise EOFError, "bad content body"
end
buf.concat(c)
content_length -= c.bytesize
end
buf = buf.sub(/\A((?:.|\n)*?)(?:[\r\n]{1,2})?#{quoted_boundary}([\r\n]{1,2}|--)/) do
body.print $1
if "--" == $2
content_length = -1
end
boundary_end = $2.dup
""
end
body.rewind
/Content-Disposition:.* filename=(?:"((?:\\.|[^\"])*)"|([^;\s]*))/i.match(head)
filename = ($1 or $2 or "")
if /Mac/i.match(env_table['HTTP_USER_AGENT']) and
/Mozilla/i.match(env_table['HTTP_USER_AGENT']) and
(not /MSIE/i.match(env_table['HTTP_USER_AGENT']))
filename = CGI::unescape(filename)
end
/Content-Type: ([^\s]*)/i.match(head)
content_type = ($1 or "")
(class << body; self; end).class_eval do
alias local_path path
define_method(:original_filename) {filename.dup.taint}
define_method(:content_type) {content_type.dup.taint}
end
/Content-Disposition:.* name="?([^\";\s]*)"?/i.match(head)
name = ($1 || "").dup
if params.has_key?(name)
params[name].push(body)
else
params[name] = [body]
end
break if buf.bytesize == 0
break if content_length == -1
end
raise EOFError, "bad boundary end of body part" unless boundary_end=~/--/
params
end # read_multipart
private :read_multipart
# offline mode. read name=value pairs on standard input.
def read_from_cmdline
require "shellwords"
string = unless ARGV.empty?
ARGV.join(' ')
else
if STDIN.tty?
STDERR.print(
%|(offline mode: enter name=value pairs on standard input)\n|
)
end
readlines.join(' ').gsub(/\n/, '')
end.gsub(/\\=/, '%3D').gsub(/\\&/, '%26')
words = Shellwords.shellwords(string)
if words.find{|x| /=/.match(x) }
words.join('&')
else
words.join('+')
end
end
private :read_from_cmdline
# A wrapper class to use a StringIO object as the body and switch
# to a TempFile when the passed threshold is passed.
class MorphingBody
begin
require "stringio"
@@small_buffer = lambda{StringIO.new}
rescue LoadError
require "tempfile"
@@small_buffer = lambda{
n = Tempfile.new("CGI")
n.binmode
n
}
end
def initialize(morph_threshold = 10240)
@threshold = morph_threshold
@body = @@small_buffer.call
@cur_size = 0
@morph_check = true
end
def print(data)
if @morph_check && (@cur_size + data.bytesize > @threshold)
convert_body
end
@body.print data
end
def rewind
@body.rewind
end
def path
@body.path
end
# returns the true body object.
def extract
@body
end
private
def convert_body
new_body = TempFile.new("CGI")
new_body.binmode if defined? @body.binmode
new_body.binmode if defined? new_body.binmode
@body.rewind
new_body.print @body.read
@body = new_body
@morph_check = false
end
end
# Initialize the data from the query.
#
# Handles multipart forms (in particular, forms that involve file uploads).
# Reads query parameters in the @params field, and cookies into @cookies.
def initialize_query()
if ("POST" == env_table['REQUEST_METHOD']) and
%r|\Amultipart/form-data.*boundary=\"?([^\";,]+)\"?|.match(env_table['CONTENT_TYPE'])
boundary = $1.dup
@multipart = true
@params = read_multipart(boundary, Integer(env_table['CONTENT_LENGTH']))
else
@multipart = false
@params = CGI::parse(
case env_table['REQUEST_METHOD']
when "GET", "HEAD"
if defined?(MOD_RUBY)
Apache::request.args or ""
else
env_table['QUERY_STRING'] or ""
end
when "POST"
stdinput.binmode if defined? stdinput.binmode
stdinput.read(Integer(env_table['CONTENT_LENGTH'])) or ''
else
read_from_cmdline
end
)
end
@cookies = CGI::Cookie::parse((env_table['HTTP_COOKIE'] or env_table['COOKIE']))
end
private :initialize_query
def multipart?
@multipart
end
# Get the value for the parameter with a given key.
#
# If the parameter has multiple values, only the first will be
# retrieved; use #params() to get the array of values.
def [](key)
params = @params[key]
return '' unless params
value = params[0]
if @multipart
if value
return value
elsif defined? StringIO
StringIO.new("")
else
Tempfile.new("CGI")
end
else
str = if value then value.dup else "" end
str
end
end
# Return all parameter keys as an array.
def keys(*args)
@params.keys(*args)
end
# Returns true if a given parameter key exists in the query.
def has_key?(*args)
@params.has_key?(*args)
end
alias key? has_key?
alias include? has_key?
end # QueryExtension
# Creates a new CGI instance.
#
# +type+ specifies which version of HTML to load the HTML generation
# methods for. The following versions of HTML are supported:
#
# html3:: HTML 3.x
# html4:: HTML 4.0
# html4Tr:: HTML 4.0 Transitional
# html4Fr:: HTML 4.0 with Framesets
#
# If not specified, no HTML generation methods will be loaded.
#
# If the CGI object is not created in a standard CGI call environment
# (that is, it can't locate REQUEST_METHOD in its environment), then
# it will run in "offline" mode. In this mode, it reads its parameters
# from the command line or (failing that) from standard input. Otherwise,
# cookies and other parameters are parsed automatically from the standard
# CGI locations, which varies according to the REQUEST_METHOD.
def initialize(type = "query")
if defined?(MOD_RUBY) && !ENV.key?("GATEWAY_INTERFACE")
Apache.request.setup_cgi_env
end
extend QueryExtension
@multipart = false
initialize_query() # set @params, @cookies
@output_cookies = nil
@output_hidden = nil
case type
when "html3"
require 'cgi/html'
extend Html3
element_init()
extend HtmlExtension
when "html4"
require 'cgi/html'
extend Html4
element_init()
extend HtmlExtension
when "html4Tr"
require 'cgi/html'
extend Html4Tr
element_init()
extend HtmlExtension
when "html4Fr"
require 'cgi/html'
extend Html4Tr
element_init()
extend Html4Fr
element_init()
extend HtmlExtension
end
end
end # class CGI
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