apt_dht/HTTPServer.py

   1
   2 from urllib import unquote_plus
   3
   4 from twisted.python import log
   5 from twisted.internet import defer
   6 from twisted.web2 import server, http, resource, channel
   7 from twisted.web2 import static, http_headers, responsecode
   8
   9 class FileDownloader(static.File):
  10
  11     def __init__(self, path, manager, defaultType="text/plain", ignoredExts=(), processors=None, indexNames=None):
  12         self.manager = manager
  13         super(FileDownloader, self).__init__(path, defaultType, ignoredExts, processors, indexNames)
  14
  15     def renderHTTP(self, req):
  16         log.msg('Got request for %s from %s' % (req.uri, req.remoteAddr))
  17         resp = super(FileDownloader, self).renderHTTP(req)
  18         if isinstance(resp, defer.Deferred):
  19             resp.addCallback(self._renderHTTP_done, req)
  20         else:
  21             resp = self._renderHTTP_done(resp, req)
  22         return resp
  23
  24     def _renderHTTP_done(self, resp, req):
  25         log.msg('Initial response to %s: %r' % (req.uri, resp))
  26
  27         if self.manager:
  28             path = 'http:/' + req.uri
  29             if resp.code >= 200 and resp.code < 400:
  30                 return self.manager.check_freshness(req, path, resp.headers.getHeader('Last-Modified'), resp)
  31
  32             log.msg('Not found, trying other methods for %s' % req.uri)
  33             return self.manager.get_resp(req, path)
  34
  35         return resp
  36
  37     def createSimilarFile(self, path):
  38         return self.__class__(path, self.manager, self.defaultType, self.ignoredExts,
  39                               self.processors, self.indexNames[:])
  40
  41
  42 class TopLevel(resource.Resource):
  43     addSlash = True
  44
  45     def __init__(self, directory, db, manager):
  46         self.directory = directory
  47         self.db = db
  48         self.manager = manager
  49         self.factory = None
  50
  51     def getHTTPFactory(self):
  52         if self.factory is None:
  53             self.factory = channel.HTTPFactory(server.Site(self),
  54                                                **{'maxPipeline': 10,
  55                                                   'betweenRequestsTimeOut': 60})
  56         return self.factory
  57
  58     def render(self, ctx):
  59         return http.Response(
  60             200,
  61             {'content-type': http_headers.MimeType('text', 'html')},
  62             """<html><body>
  63             <h2>Statistics</h2>
  64             <p>TODO: eventually some stats will be shown here.</body></html>""")
  65
  66     def locateChild(self, request, segments):
  67         log.msg('Got HTTP request for %s from %s' % (request.uri, request.remoteAddr))
  68         name = segments[0]
  69         if name == '~':
  70             if len(segments) != 2:
  71                 log.msg('Got a malformed request from %s' % request.remoteAddr)
  72                 return None, ()
  73             hash = unquote_plus(segments[1])
  74             files = self.db.lookupHash(hash)
  75             if files:
  76                 log.msg('Sharing %s with %s' % (files[0]['path'].path, request.remoteAddr))
  77                 return static.File(files[0]['path'].path), ()
  78             else:
  79                 log.msg('Hash could not be found in database: %s' % hash)
  80
  81         if request.remoteAddr.host != "127.0.0.1":
  82             log.msg('Blocked illegal access to %s from %s' % (request.uri, request.remoteAddr))
  83             return None, ()
  84
  85         if len(name) > 1:
  86             return FileDownloader(self.directory.path, self.manager), segments[0:]
  87         else:
  88             return self, ()
  89
  90         log.msg('Got a malformed request for "%s" from %s' % (request.uri, request.remoteAddr))
  91         return None, ()
  92
  93 if __name__ == '__builtin__':
  94     # Running from twistd -y
  95     t = TopLevel('/home', None)
  96     t.setDirectories({'~1': '/tmp', '~2': '/var/log'})
  97     factory = t.getHTTPFactory()
  98
  99     # Standard twisted application Boilerplate
 100     from twisted.application import service, strports
 101     application = service.Application("demoserver")
 102     s = strports.service('tcp:18080', factory)
 103     s.setServiceParent(application)