Ruby之发送请求获取数据

#encoding:utf-8

require "open-uri"
require "timeout"
require ‘rubygems‘
require "nokogiri"

uri = "http://api.map.baidu.com/direction/v1?mode=driving&origin=&destination=北京大学&origin_region=北京&destination_region=北京&output=xml&ak=E4805d16520de693a3fe707cdc962045上地五街"
begin
    req = open(URI.escape(uri)).read
    doc = Nokogiri::XML(open(URI.escape(uri)), nil, ‘utf-8‘)
    # doc.encoding = "utf-8"
    root = doc.root
    origin = root.xpath("result/origin/originPt")
    rescue StandardError,Timeout::Error, SystemCallError,Errno::ECONNREFUSED
    puts $!
else
    puts origin.xpath("lng").text
end