今天尝试了下Google App Engine，免费的东西就是爽啊。

（1）https://appengine.google.com/  新建一个应用。

（2）下载GAE SDK for Python并安装。 http://code.google.com/appengine/downloads.html

（3）打开GAE Launcher，新建一个应用。

（5）如何将应用部署到GAE服务器上？看到GAE Launcher上的Deploy按钮了吧？

点击这个按钮，按照提示输入你的谷歌账户密码，然后项目文件就自动被上传到GAE服务器上了。

当消息窗口提示“You can close this window now.”时，说明已经部署完毕了。

就可以使用http://red-ice.appspot.com/来访问我们的应用了。

#!/usr/bin/env python
#
# Copyright 2007 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

from google.appengine.ext import webapp
from google.appengine.ext.webapp import util
import re
import gzip
from StringIO import StringIO
import urllib2
import urllib
from urlparse import urljoin

DEBUG = True

class MainHandler(webapp.RequestHandler):
    def get(self):
        down = DownLoad()
        self.response.out.write(down.get('http://www.redicecn.com'))


class DownLoad:
    
    def get(self, url, num_retries=2):
        opener = urllib2.build_opener()
        headers = {'User-agent': 'Mozilla/5.0', 'Accept-encoding': 'gzip', 'Referrer': url}
        try:
            response = opener.open(urllib2.Request(url, None, headers))
            content = response.read()
            if response.headers.get('content-encoding') == 'gzip':
                # data came back gzip-compressed so decompress it
                content = gzip.GzipFile(fileobj=StringIO(content)).read()

            if not isinstance(content,unicode):
                content = unicode(content,'gbk')

            content = re.compile(r'''(href|src)=['"](.*?)['"]''',re.DOTALL | re.IGNORECASE).sub(lambda m : m.groups()[0]+'="'+urljoin(url,m.groups()[1])+'"',content)
                
        except Exception, e:
            # so many kinds of errors are possible here so just catch them all
            if num_retries > 0:
                content = self.get(url, num_retries - 1)
            else:
                content = ''
        return content

    
def main():
    application = webapp.WSGIApplication([('/', MainHandler)],
                                         debug=True)
    util.run_wsgi_app(application)


if __name__ == '__main__':
    main()

效果如下：http://red-ice.appspot.com/

关于GAE的更多资料请访问：http://code.google.com/appengine/