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#!/usr/bin/python -u
#
# droiddemo.py, Copyright 2010, The Beanstalks Project ehf.
# http://beanstalks-project.net/
#
# This is a proof-of-concept PageKite enabled HTTP server for Android.
# It has been developed and tested in the SL4A Python environment.
#
DOMAIN='phone.bre.pagekite.me'
SECRET='ba4e5430'
SOURCE='/sdcard/sl4a/scripts/droiddemo.py'
#
#############################################################################
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
#############################################################################
#
import android
import pagekite
import os
from urllib import unquote
try:
  from urlparse import parse_qs, urlparse
except Exception, e:
  from cgi import parse_qs
  from urlparse import urlparse



class UiRequestHandler(pagekite.UiRequestHandler):

  CAMERA_PATH = '/sdcard/dcim/.thumbnails'
  HOME = ('<html><head>\n'
          '<script type=text/javascript>'
           'lastImage = "";'
           'function getImage() {'
            'xhr = new XMLHttpRequest();'
            'xhr.open("GET", "/latest-image.txt", true);'
            'xhr.onreadystatechange = function() {'
             'if (xhr.readyState == 4) {'
              'if (xhr.responseText && xhr.responseText != lastImage) {'
               'document.getElementById("i").src = lastImage = xhr.responseText;'
              '}'
              'setTimeout("getImage()", 2000);'
             '}'
            '};'
           'xhr.send(null);'
           '}'
          '</script>\n'
          '</head><body onLoad="getImage();" style="text-align: center;">\n'
          '<h1>Android photos!</h1>\n'
          '<img id=i height=80% src="http://www.android.com/images/opensourceproject.gif">\n'
          '<br><a href="/droiddemo.py">source code</a>'
          '| <a href="/status.html">kite status</a>\n'
          '</body></head>')

  def listFiles(self):
    mtimes = {}
    for item in os.listdir(self.CAMERA_PATH):
      iname = '%s/%s' % (self.CAMERA_PATH, item)
      if iname.endswith('.jpg'):
        mtimes[iname] = os.path.getmtime(iname)

    files = mtimes.keys()
    files.sort(lambda x,y: cmp(mtimes[x], mtimes[y]))
    return files

  def do_GET(self):
    (scheme, netloc, path, params, query, frag) = urlparse(self.path)

    p = unquote(path)
    if p.endswith('.jpg') and p.startswith(self.CAMERA_PATH) and ('..' not in p):
      try:
        jpgfile = open(p)
        self.send_response(200)
        self.send_header('Content-Type', 'image/jpeg')
        self.send_header('Content-Length', '%s' % os.path.getsize(p))
        self.send_header('Cache-Control', 'max-age: 36000')
        self.send_header('Expires', 'Sat, 1 Jan 2011 12:00:00 GMT')
        self.send_header('Last-Modified', 'Wed, 1 Sep 2011 12:00:00 GMT')
        self.end_headers()
        data = jpgfile.read()
        while data:
          try:
            sent = self.wfile.write(data[0:15000])
            data = data[15000:]
          except Exception:
            pass
        return
 
      except Exception, e:
        print '%s' % e
        pass

    if path == '/latest-image.txt':
      flist = self.listFiles()
      self.begin_headers(200, 'text/plain')
      self.end_headers()
      self.wfile.write(flist[-1])
      return
    elif path == '/droiddemo.py':
      try:
        pyfile = open(SOURCE)
        self.begin_headers(200, 'text/plain')
        self.end_headers()
        self.wfile.write(pyfile.read().replace(SECRET, 'mysecret'))
      except IOError, e:
        self.begin_headers(404, 'text/plain')
        self.end_headers()
        self.wfile.write('Could not read %s: %s' % (SOURCE, e))
      return
    elif path == '/':
      self.begin_headers(200, 'text/html')
      self.end_headers()
      self.wfile.write(self.HOME)
      return

    return pagekite.UiRequestHandler.do_GET(self)


class DroidKite(pagekite.PageKite):
  def __init__(self, droid):
    pagekite.PageKite.__init__(self)
    self.droid = droid
    self.ui_request_handler = UiRequestHandler


def Start(host, secret):
  ds = DroidKite(android.Android())
  ds.Configure(['--defaults',
                '--httpd=localhost:9999',
                '--backend=http:%s:localhost:9999:%s' % (host, secret)])
  ds.Start()


Start(DOMAIN, SECRET)
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