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# use it like so: Net::HTTP.multi_post_form(url, params) class Net::HTTP def self.multi_post_form(url, params) req = Post.new(url.path) req.multipart_params = params req.basic_auth url.user, url.password if url.user new(url.host, url.port).start {|http| http.request(req) } end end module Net class HTTP class Post def multipart_params=(param_hash={}) boundary_token = [Array.new(8) {rand(256)}].join self.content_type = "multipart/form-data; boundary=#{boundary_token}" boundary_marker = "--#{boundary_token}\r\n" self.body = param_hash.map { |param_name, param_value| boundary_marker + text_to_multipart(param_name, param_hash.delete(param_name).to_s) unless param_value.respond_to?(:read) }.join('') self.body += param_hash.map { |param_name, param_value| boundary_marker + file_to_multipart(param_name, param_value) }.join('') self.body += "--#{boundary_token}--\r\n" end protected def file_to_multipart(key,file) filename = File.basename(file.path || file.base_uri.to_s) mime_type = "application/octet-stream" part = %Q|Content-Disposition: form-data; name=\"#{key}\"; filename="#{filename}"\r\n| part += "Content-Transfer-Encoding: binary\r\n" part += "Content-Type: #{mime_type}\r\n\r\n#{file.read}\r\n" end def text_to_multipart(key,value) "Content-Disposition: form-data; name=\"#{key}\"\r\n\r\n#{value}\r\n" end end end end