client

   1 #!/usr/bin/python3
   2
   3 from hippotat import *
   4
   5 import twisted.web
   6 import twisted.web.client
   7
   8 import io
   9
  10 client_cs = None
  11
  12 def set_client(ci,cs,pw):
  13   global client_cs
  14   global password
  15   assert(client_cs is None)
  16   client_cs = cs
  17   c.client = ci
  18   c.max_outstanding = cfg.getint(cs, 'max_requests_outstanding')
  19   c.target_outstanding = cfg.getint(cs, 'target_requests_outstanding')
  20   password = pw
  21
  22 def process_cfg():
  23   global url
  24   global max_requests_outstanding
  25
  26   process_cfg_common_always()
  27   process_cfg_server()
  28
  29   try:
  30     c.url = cfg.get('server','url')
  31   except NoOptionError:
  32     process_cfg_saddrs()
  33     c.url = c.saddrs[0].url()
  34
  35   process_cfg_clients(set_client)
  36
  37   c.routes = cfg.get('virtual','routes')
  38   c.max_queue_time = cfg.getint(client_cs, 'max_queue_time')
  39   c.max_batch_up   = cfg.getint(client_cs, 'max_batch_up')
  40   c.http_timeout   = cfg.getint(client_cs, 'http_timeout')
  41   c.http_retry     = cfg.getint(client_cs, 'http_retry')
  42
  43   process_cfg_ipif(client_cs,
  44                    (('local', 'client'),
  45                     ('peer',  'server'),
  46                     ('rnets', 'routes')))
  47
  48 outstanding = { }
  49
  50 def log_outstanding():
  51   log_debug(DBG.CTRL_DUMP, 'OS %s' % outstanding)
  52
  53 def start_client():
  54   global queue
  55   global agent
  56   queue = PacketQueue('up', c.max_queue_time)
  57   agent = twisted.web.client.Agent(reactor, connectTimeout = c.http_timeout)
  58
  59 def outbound(packet, saddr, daddr):
  60   #print('OUT ', saddr, daddr, repr(packet))
  61   queue.append(packet)
  62   check_outbound()
  63
  64 class GeneralResponseConsumer(twisted.internet.protocol.Protocol):
  65   def __init__(self, req, desc):
  66     self._req = req
  67     self._desc = desc
  68
  69   def _log(self, dflag, msg, **kwargs):
  70     log_debug(dflag, '%s: %s' % (self._desc, msg), idof=self._req, **kwargs)
  71
  72   def connectionMade(self):
  73     self._log(DBG.HTTP_CTRL, 'connectionMade')
  74
  75 class ResponseConsumer(GeneralResponseConsumer):
  76   def __init__(self, req):
  77     super().__init__(req, 'RC')
  78     ssddesc = '[%s] %s' % (id(req), self._desc)
  79     self._ssd = SlipStreamDecoder(ssddesc, queue_inbound)
  80     self._log(DBG.HTTP_CTRL, '__init__')
  81
  82   def dataReceived(self, data):
  83     self._log(DBG.HTTP_CTRL, 'dataReceived', d=data)
  84     try:
  85       self._ssd.inputdata(data)
  86     except Exception as e:
  87       self._handleexception()
  88
  89   def connectionLost(self, reason):
  90     self._log(DBG.HTTP_CTRL, 'connectionLost ' + str(reason))
  91     if not reason.check(twisted.web.client.ResponseDone):
  92       self.latefailure()
  93       return
  94     try:
  95       self._ssd.flush()
  96       req_fin(req)
  97     except Exception as e:
  98       self._handleexception()
  99
 100   def _handleexception(self):
 101     self._latefailure(traceback.format_exc())
 102
 103   def _latefailure(self, reason):
 104     self._log(DBG.HTTP_CTRL, '_asyncFailure ' + str(reason))
 105     req_err(self._req, reason)
 106
 107 class ErrorResponseConsumer(twisted.internet.protocol.Protocol):
 108   def __init__(self, req, resp):
 109     super().__init__(req, 'ERROR-RC')
 110     self._resp = resp
 111     self._m = b''
 112     try:
 113       self._phrase = resp.phrase.decode('utf-8')
 114     except Exception:
 115       self._phrase = repr(resp.phrase)
 116     self._log(DBG.HTTP_CTRL, '__init__ %d %s' % (resp.code, self._phrase))
 117
 118   def dataReceived(self, data):
 119     self._log(DBG.HTTP_CTRL, 'dataReceived ' + repr(data))
 120     self._m += data
 121
 122   def connectionLost(self, reason):
 123     try:
 124       mbody = self._m.decode('utf-8')
 125     except Exception:
 126       mbody = repr(self._m)
 127     if not reason.check(twisted.web.client.ResponseDone):
 128       mbody += ' || ' + str(reason)
 129     req_err(self._req,
 130             "FAILED %d %s | %s"
 131             % (self._resp.code, self._phrase, mbody))
 132
 133 def req_ok(req, resp):
 134   log_debug(DBG.HTTP_CTRL,
 135             'req_ok %d %s %s' % (resp.code, repr(resp.phrase), str(resp)),
 136             idof=req)
 137   if resp.code == 200:
 138     rc = ResponseConsumer(req)
 139   else:
 140     rc = ErrorResponseConsumer(req, resp)
 141
 142   resp.deliverBody(rc)
 143   # now rc is responsible for calling req_fin
 144
 145 def req_err(req, err):
 146   # called when the Deferred fails, or (if it completes),
 147   # later, by ResponsConsumer or ErrorResponsConsumer
 148   log_debug(DBG.HTTP_CTRL, 'req_err ' + str(err), idof=req)
 149   if isinstance(err, twisted.python.failure.Failure):
 150     err = err.getTraceback()
 151   print(err, file=sys.stderr)
 152   outstanding[req] = 'ERR'
 153   log_outstanding()
 154   reactor.callLater(c.http_retry, (lambda: req_fin(req)))
 155
 156 def req_fin(req):
 157   del outstanding[req]
 158   log_debug(DBG.HTTP_CTRL, 'req_fin OS=%d' % len(outstanding), idof=req)
 159   check_outbound()
 160
 161 def check_outbound():
 162   global outstanding
 163
 164   while True:
 165     if                          len(outstanding) >= c.max_outstanding   : break
 166     if not queue.nonempty() and len(outstanding) >= c.target_outstanding: break
 167
 168     d = b''
 169     def moredata(s): nonlocal d; d += s
 170     queue.process((lambda: len(d)),
 171                   moredata,
 172                   c.max_batch_up)
 173
 174     d = mime_translate(d)
 175
 176     crlf = b'\r\n'
 177     lf   =   b'\n'
 178     mime = (b'--b'                                        + crlf +
 179             b'Content-Type: text/plain; charset="utf-8"'  + crlf +
 180             b'Content-Disposition: form-data; name="m"'   + crlf + crlf +
 181             str(c.client)             .encode('ascii')    + crlf +
 182             password                                      + crlf +
 183             str(c.target_outstanding) .encode('ascii')    + crlf +
 184           ((
 185             b'--b'                                        + crlf +
 186             b'Content-Type: application/octet-stream'     + crlf +
 187             b'Content-Disposition: form-data; name="d"'   + crlf + crlf +
 188             d                                             + crlf
 189            ) if len(d) else b'')                               +
 190             b'--b--'                                      + crlf)
 191
 192     #df = open('data.dump.dbg', mode='wb')
 193     #df.write(mime)
 194     #df.close()
 195     # POST -use -c 'multipart/form-data; boundary="b"' http://localhost:8099/ <data.dump.dbg
 196
 197     log_debug(DBG.HTTP_FULL, 'requesting: ' + str(mime))
 198
 199     hh = { 'User-Agent': ['hippotat'],
 200            'Content-Type': ['multipart/form-data; boundary="b"'],
 201            'Content-Length': [str(len(mime))] }
 202
 203     bytesreader = io.BytesIO(mime)
 204     producer = twisted.web.client.FileBodyProducer(bytesreader)
 205
 206     req = agent.request(b'POST',
 207                         c.url,
 208                         twisted.web.client.Headers(hh),
 209                         producer)
 210
 211     outstanding[req] = len(d)
 212     log_debug(DBG.HTTP_CTRL, 'request OS=%d' % len(outstanding), idof=req, d=d)
 213     req.addTimeout(c.http_timeout, reactor)
 214     req.addCallback((lambda resp: req_ok(req, resp)))
 215     req.addErrback((lambda err: req_err(req, err)))
 216
 217   log_outstanding()
 218
 219 common_startup()
 220 process_cfg()
 221 start_client()
 222 start_ipif(c.ipif_command, outbound)
 223 check_outbound()
 224 common_run()