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# frozen_string_literal: true
require_relative 'multipart/parser'
module Rack
# A multipart form data parser, adapted from IOWA.
#
# Usually, Rack::Request#POST takes care of calling this.
module Multipart
autoload :UploadedFile, 'rack/multipart/uploaded_file'
autoload :Generator, 'rack/multipart/generator'
EOL = "\r\n"
MULTIPART_BOUNDARY = "AaB03x"
MULTIPART = %r|\Amultipart/.*boundary=\"?([^\";,]+)\"?|ni
TOKEN = /[^\s()<>,;:\\"\/\[\]?=]+/
CONDISP = /Content-Disposition:\s*#{TOKEN}\s*/i
VALUE = /"(?:\\"|[^"])*"|#{TOKEN}/
BROKEN = /^#{CONDISP}.*;\s*filename=(#{VALUE})/i
MULTIPART_CONTENT_TYPE = /Content-Type: (.*)#{EOL}/ni
MULTIPART_CONTENT_DISPOSITION = /Content-Disposition:[^:]*;\s*name=(#{VALUE})/ni
MULTIPART_CONTENT_ID = /Content-ID:\s*([^#{EOL}]*)/ni
# Updated definitions from RFC 2231
ATTRIBUTE_CHAR = %r{[^ \x00-\x1f\x7f)(><@,;:\\"/\[\]?='*%]}
ATTRIBUTE = /#{ATTRIBUTE_CHAR}+/
SECTION = /\*[0-9]+/
REGULAR_PARAMETER_NAME = /#{ATTRIBUTE}#{SECTION}?/
REGULAR_PARAMETER = /(#{REGULAR_PARAMETER_NAME})=(#{VALUE})/
EXTENDED_OTHER_NAME = /#{ATTRIBUTE}\*[1-9][0-9]*\*/
EXTENDED_OTHER_VALUE = /%[0-9a-fA-F]{2}|#{ATTRIBUTE_CHAR}/
EXTENDED_OTHER_PARAMETER = /(#{EXTENDED_OTHER_NAME})=(#{EXTENDED_OTHER_VALUE}*)/
EXTENDED_INITIAL_NAME = /#{ATTRIBUTE}(?:\*0)?\*/
EXTENDED_INITIAL_VALUE = /[a-zA-Z0-9\-]*'[a-zA-Z0-9\-]*'#{EXTENDED_OTHER_VALUE}*/
EXTENDED_INITIAL_PARAMETER = /(#{EXTENDED_INITIAL_NAME})=(#{EXTENDED_INITIAL_VALUE})/
EXTENDED_PARAMETER = /#{EXTENDED_INITIAL_PARAMETER}|#{EXTENDED_OTHER_PARAMETER}/
DISPPARM = /;\s*(?:#{REGULAR_PARAMETER}|#{EXTENDED_PARAMETER})\s*/
RFC2183 = /^#{CONDISP}(#{DISPPARM})+$/i
class << self
def parse_multipart(env, params = Rack::Utils.default_query_parser)
extract_multipart Rack::Request.new(env), params
end
def extract_multipart(req, params = Rack::Utils.default_query_parser)
io = req.get_header(RACK_INPUT)
io.rewind
content_length = req.content_length
content_length = content_length.to_i if content_length
tempfile = req.get_header(RACK_MULTIPART_TEMPFILE_FACTORY) || Parser::TEMPFILE_FACTORY
bufsize = req.get_header(RACK_MULTIPART_BUFFER_SIZE) || Parser::BUFSIZE
info = Parser.parse io, content_length, req.get_header('CONTENT_TYPE'), tempfile, bufsize, params
req.set_header(RACK_TEMPFILES, info.tmp_files)
info.params
end
def build_multipart(params, first = true)
Generator.new(params, first).dump
end
end
end
end