Module: Rack::Utils::Multipart
- Defined in:
- lib/action_controller/vendor/rack-1.0/rack/utils.rb
Overview
A multipart form data parser, adapted from IOWA.
Usually, Rack::Request#POST takes care of calling this.
Constant Summary collapse
- EOL =
"\r\n"
Class Method Summary collapse
Class Method Details
.parse_multipart(env) ⇒ Object
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# File 'lib/action_controller/vendor/rack-1.0/rack/utils.rb', line 293 def self.parse_multipart(env) unless env['CONTENT_TYPE'] =~ %r|\Amultipart/form-data.*boundary=\"?([^\";,]+)\"?|n nil else boundary = "--#{$1}" params = {} buf = "" content_length = env['CONTENT_LENGTH'].to_i input = env['rack.input'] boundary_size = boundary.size + EOL.size bufsize = 16384 content_length -= boundary_size status = input.read(boundary_size) raise EOFError, "bad content body" unless status == boundary + EOL rx = /(?:#{EOL})?#{Regexp.quote boundary}(#{EOL}|--)/n loop { head = nil body = '' filename = content_type = name = nil until head && buf =~ rx if !head && i = buf.index("\r\n\r\n") head = buf.slice!(0, i+2) # First \r\n buf.slice!(0, 2) # Second \r\n filename = head[/Content-Disposition:.* filename="?([^\";]*)"?/ni, 1] content_type = head[/Content-Type: (.*)\r\n/ni, 1] name = head[/Content-Disposition:.* name="?([^\";]*)"?/ni, 1] if filename body = Tempfile.new("RackMultipart") body.binmode if body.respond_to?(:binmode) end next end # Save the read body part. if head && (boundary_size+4 < buf.size) body << buf.slice!(0, buf.size - (boundary_size+4)) end c = input.read(bufsize < content_length ? bufsize : content_length) raise EOFError, "bad content body" if c.nil? || c.empty? buf << c content_length -= c.size end # Save the rest. if i = buf.index(rx) body << buf.slice!(0, i) buf.slice!(0, boundary_size+2) content_length = -1 if $1 == "--" end if filename == "" # filename is blank which means no file has been selected data = nil elsif filename body.rewind # 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. filename =~ /^(?:.*[:\\\/])?(.*)/m filename = $1 data = {:filename => filename, :type => content_type, :name => name, :tempfile => body, :head => head} else data = body end Utils.normalize_params(params, name, data) unless data.nil? break if buf.empty? || content_length == -1 } begin input.rewind if input.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 |