Ejemplo n.º 1
0
def renderMyGraphView(request,username,graphName):
  profile = getProfileByUsername(username)
  assert profile, "No such user '%s'" % username
  try:
    graph = profile.mygraph_set.get(name=graphName)
  except ObjectDoesNotExist:
    assert False, "User %s doesn't have a MyGraph named '%s'" % (username,graphName)
  (proto,host,path,query,frag) = urlsplit( graph.url )
  if query: path += '?' + query
  conn = HTTPConnectionWithTimeout( host )
  conn.request('GET', path)
  resp = conn.getresponse()
  assert resp.status == 200, "Failed to retrieve image from URL %s" % graph.url
  imageData = resp.read()
  return buildResponse(imageData)
Ejemplo n.º 2
0
def renderMyGraphView(request, username, graphName):
    profile = getProfileByUsername(username)
    assert profile, "No such user '%s'" % username
    try:
        graph = profile.mygraph_set.get(name=graphName)
    except ObjectDoesNotExist:
        assert False, "User %s doesn't have a MyGraph named '%s'" % (username,
                                                                     graphName)
    (proto, host, path, query, frag) = urlsplit(graph.url)
    if query: path += '?' + query
    conn = HTTPConnectionWithTimeout(host)
    conn.request('GET', path)
    resp = conn.getresponse()
    assert resp.status == 200, "Failed to retrieve image from URL %s" % graph.url
    imageData = resp.read()
    return buildResponse(imageData)
Ejemplo n.º 3
0
def delegateRendering(graphType, graphOptions):
    start = time()
    postData = graphType + '\n' + pickle.dumps(graphOptions)
    servers = settings.RENDERING_HOSTS[:]  #make a copy so we can shuffle it safely
    shuffle(servers)
    for server in servers:
        start2 = time()
        try:
            # Get a connection
            try:
                pool = connectionPools[server]
            except KeyError:  #happens the first time
                pool = connectionPools[server] = set()
            try:
                connection = pool.pop()
            except KeyError:  #No available connections, have to make a new one
                connection = HTTPConnectionWithTimeout(server)
                connection.timeout = settings.REMOTE_RENDER_CONNECT_TIMEOUT
            # Send the request
            try:
                connection.request('POST', '/render/local/', postData)
            except CannotSendRequest:
                connection = HTTPConnectionWithTimeout(server)  #retry once
                connection.timeout = settings.REMOTE_RENDER_CONNECT_TIMEOUT
                conn.request('POST', '/render/local/', postData)
            # Read the response
            response = conn.getresponse()
            assert response.status == 200, "Bad response code %d from %s" % (
                response.status, server)
            contentType = response.getheader('Content-Type')
            imageData = response.read()
            assert contentType == 'image/png', "Bad content type: \"%s\" from %s" % (
                contentType, server)
            assert imageData, "Received empty response from %s" % server
            # Wrap things up
            log.rendering('Remotely rendered image on %s in %.6f seconds' %
                          (server, time() - start2))
            log.rendering(
                'Spent a total of %.6f seconds doing remote rendering work' %
                (time() - start))
            pool.add(connection)
            return imageData
        except:
            log.exception(
                "Exception while attempting remote rendering request on %s" %
                server)
            log.rendering(
                'Exception while remotely rendering on %s wasted %.6f' %
                (server, time() - start2))
            continue
Ejemplo n.º 4
0
def delegateRendering(graphType, graphOptions):
  start = time()
  postData = graphType + '\n' + pickle.dumps(graphOptions)
  servers = settings.RENDERING_HOSTS[:] #make a copy so we can shuffle it safely
  shuffle(servers)
  for server in servers:
    start2 = time()
    try:
      # Get a connection
      try:
        pool = connectionPools[server]
      except KeyError: #happens the first time
        pool = connectionPools[server] = set()
      try:
        connection = pool.pop()
      except KeyError: #No available connections, have to make a new one
        connection = HTTPConnectionWithTimeout(server)
        connection.timeout = settings.REMOTE_RENDER_CONNECT_TIMEOUT
      # Send the request
      try:
        connection.request('POST','/render/local/', postData)
      except CannotSendRequest:
        connection = HTTPConnectionWithTimeout(server) #retry once
        connection.timeout = settings.REMOTE_RENDER_CONNECT_TIMEOUT
        connection.request('POST', '/render/local/', postData)
      # Read the response
      response = connection.getresponse()
      assert response.status == 200, "Bad response code %d from %s" % (response.status,server)
      contentType = response.getheader('Content-Type')
      imageData = response.read()
      assert contentType == 'image/png', "Bad content type: \"%s\" from %s" % (contentType,server)
      assert imageData, "Received empty response from %s" % server
      # Wrap things up
      log.rendering('Remotely rendered image on %s in %.6f seconds' % (server,time() - start2))
      log.rendering('Spent a total of %.6f seconds doing remote rendering work' % (time() - start))
      pool.add(connection)
      return imageData
    except:
      log.exception("Exception while attempting remote rendering request on %s" % server)
      log.rendering('Exception while remotely rendering on %s wasted %.6f' % (server,time() - start2))
      continue