var http = require("http"),
 url = require("url"),
 path = require("path"),
 fs = require("fs"),
 local_folders,
 base_url;

local_folders = [ // 本地路徑，代理將在這個列表中的目錄下尋找文件，如果沒有找到則轉(zhuǎn)到線上地址
 "D:/work/assets"
];
base_url = "http://10.232.133.214"; // 線上路徑，如果找不到文件，則轉(zhuǎn)向到這個地址

function loadFile(pathname, response) {
 var i, l = local_folders.length,
  fn;

 console.log("try to load " + pathname);

 for (i = 0; i < l; i++) {

  fn = local_folders[i] + pathname;
  if (path.existsSync(fn) && fs.statSync(fn).isFile()) {
   fs.readFile(fn, function (err, data) {
    response.writeHead(200);
    response.write(data);
    response.end();
   });

   return;
  }

 }

 response.writeHead(302, {
  "Location":base_url + pathname
 });
 response.end();
}

http.createServer(
 function (request, response) {

  var req_url = request.url,
   pathname;

  // 處理類似 http://a.tbcdn.cn/??p/global/1.0/global-min.css,tbsp/tbsp.css?t=20110920172000.css 的請求
  pathname = req_url.indexOf("??") == -1 ? url.parse(request.url).pathname : req_url;
  console.log("Request for '" + pathname + "' received.");
  loadFile(pathname, response);

 }).listen(80);

import os
import BaseHTTPServer

LOCAL_FOLDERS = [
    "D:/work/assets"
]
BASE_URL = "http://10.232.133.214"

class WebRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):

    def do_GET(self):
        print "Request for '%s' received." % self.path
        for folder in LOCAL_FOLDERS:
            fn = os.path.join(folder, self.path.replace("/", os.sep)[1:])
            if os.path.isfile(fn):
                self.send_response(200)
                self.wfile.write(open(fn, "rb").read())
                break

        else:
            self.send_response(302)
            self.send_header("Location", "%s%s" % (BASE_URL, self.path))

server = BaseHTTPServer.HTTPServer(("0.0.0.0", 80), WebRequestHandler)
server.serve_forever()