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_retry     = cfg.getint(client_cs, 'http_retry')
  41   c.http_timeout = (cfg.getint(client_cs, 'http_timeout') +
  42                     cfg.getint(client_cs, 'http_timeout_grace'))
  43
  44   process_cfg_ipif(client_cs,
  45                    (('local', 'client'),
  46                     ('peer',  'server'),
  47                     ('rnets', 'routes')))
  48
  49 outstanding = { }
  50
  51 def log_outstanding():
  52   log_debug(DBG.CTRL_DUMP, 'OS %s' % outstanding)
  53
  54 def start_client():
  55   global queue
  56   global agent
  57   queue = PacketQueue('up', c.max_queue_time)
  58   agent = twisted.web.client.Agent(reactor, connectTimeout = c.http_timeout)
  59
  60 def outbound(packet, saddr, daddr):
  61   #print('OUT ', saddr, daddr, repr(packet))
  62   queue.append(packet)
  63   check_outbound()
  64
  65 class GeneralResponseConsumer(twisted.internet.protocol.Protocol):
  66   def __init__(self, req, desc):
  67     self._req = req
  68     self._desc = desc
  69
  70   def _log(self, dflag, msg, **kwargs):
  71     log_debug(dflag, '%s: %s' % (self._desc, msg), idof=self._req, **kwargs)
  72
  73   def connectionMade(self):
  74     self._log(DBG.HTTP_CTRL, 'connectionMade')
  75
  76 class ResponseConsumer(GeneralResponseConsumer):
  77   def __init__(self, req):
  78     super().__init__(req, 'RC')
  79     ssddesc = '[%s] %s' % (id(req), self._desc)
  80     self._ssd = SlipStreamDecoder(ssddesc, queue_inbound)
  81     self._log(DBG.HTTP_CTRL, '__init__')
  82
  83   def dataReceived(self, data):
  84     self._log(DBG.HTTP_CTRL, 'dataReceived', d=data)
  85     try:
  86       self._ssd.inputdata(data)
  87     except Exception as e:
  88       self._handleexception()
  89
  90   def connectionLost(self, reason):
  91     self._log(DBG.HTTP_CTRL, 'connectionLost ' + str(reason))
  92     if not reason.check(twisted.web.client.ResponseDone):
  93       self.latefailure()
  94       return
  95     try:
  96       self._ssd.flush()
  97       req_fin(self._req)
  98     except Exception as e:
  99       self._handleexception()
 100
 101   def _handleexception(self):
 102     self._latefailure(traceback.format_exc())
 103
 104   def _latefailure(self, reason):
 105     self._log(DBG.HTTP_CTRL, '_asyncFailure ' + str(reason))
 106     req_err(self._req, reason)
 107
 108 class ErrorResponseConsumer(twisted.internet.protocol.Protocol):
 109   def __init__(self, req, resp):
 110     super().__init__(req, 'ERROR-RC')
 111     self._resp = resp
 112     self._m = b''
 113     try:
 114       self._phrase = resp.phrase.decode('utf-8')
 115     except Exception:
 116       self._phrase = repr(resp.phrase)
 117     self._log(DBG.HTTP_CTRL, '__init__ %d %s' % (resp.code, self._phrase))
 118
 119   def dataReceived(self, data):
 120     self._log(DBG.HTTP_CTRL, 'dataReceived ' + repr(data))
 121     self._m += data
 122
 123   def connectionLost(self, reason):
 124     try:
 125       mbody = self._m.decode('utf-8')
 126     except Exception:
 127       mbody = repr(self._m)
 128     if not reason.check(twisted.web.client.ResponseDone):
 129       mbody += ' || ' + str(reason)
 130     req_err(self._req,
 131             "FAILED %d %s | %s"
 132             % (self._resp.code, self._phrase, mbody))
 133
 134 def req_ok(req, resp):
 135   log_debug(DBG.HTTP_CTRL,
 136             'req_ok %d %s %s' % (resp.code, repr(resp.phrase), str(resp)),
 137             idof=req)
 138   if resp.code == 200:
 139     rc = ResponseConsumer(req)
 140   else:
 141     rc = ErrorResponseConsumer(req, resp)
 142
 143   resp.deliverBody(rc)
 144   # now rc is responsible for calling req_fin
 145
 146 def req_err(req, err):
 147   # called when the Deferred fails, or (if it completes),
 148   # later, by ResponsConsumer or ErrorResponsConsumer
 149   try:
 150     log_debug(DBG.HTTP_CTRL, 'req_err ' + str(err), idof=req)
 151     if isinstance(err, twisted.python.failure.Failure):
 152       err = err.getTraceback()
 153     print('[%#x] %s' % (id(req), err), file=sys.stderr)
 154     if not isinstance(outstanding[req], int):
 155       raise RuntimeError('[%#x] previously %s' % (id(req), outstanding[req]))
 156     outstanding[req] = err
 157     log_outstanding()
 158     reactor.callLater(c.http_retry, partial(req_fin, req))
 159   except Exception as e:
 160     crash(traceback.format_exc() + '\n----- handling -----\n' + err)
 161
 162 def req_fin(req):
 163   del outstanding[req]
 164   log_debug(DBG.HTTP_CTRL, 'req_fin OS=%d' % len(outstanding), idof=req)
 165   check_outbound()
 166
 167 class Errb:
 168   def __init__(self, req):
 169     self._req = req
 170   def call(self, err):
 171     req_err(self._req, err)
 172
 173 def check_outbound():
 174   global outstanding
 175
 176   while True:
 177     if                          len(outstanding) >= c.max_outstanding   : break
 178     if not queue.nonempty() and len(outstanding) >= c.target_outstanding: break
 179
 180     d = b''
 181     def moredata(s): nonlocal d; d += s
 182     queue.process((lambda: len(d)),
 183                   moredata,
 184                   c.max_batch_up)
 185
 186     d = mime_translate(d)
 187
 188     crlf = b'\r\n'
 189     lf   =   b'\n'
 190     mime = (b'--b'                                        + crlf +
 191             b'Content-Type: text/plain; charset="utf-8"'  + crlf +
 192             b'Content-Disposition: form-data; name="m"'   + crlf + crlf +
 193             str(c.client)             .encode('ascii')    + crlf +
 194             password                                      + crlf +
 195             str(c.target_outstanding) .encode('ascii')    + crlf +
 196             str(c.http_timeout)       .encode('ascii')    + crlf +
 197           ((
 198             b'--b'                                        + crlf +
 199             b'Content-Type: application/octet-stream'     + crlf +
 200             b'Content-Disposition: form-data; name="d"'   + crlf + crlf +
 201             d                                             + crlf
 202            ) if len(d) else b'')                               +
 203             b'--b--'                                      + crlf)
 204
 205     #df = open('data.dump.dbg', mode='wb')
 206     #df.write(mime)
 207     #df.close()
 208     # POST -use -c 'multipart/form-data; boundary="b"' http://localhost:8099/ <data.dump.dbg
 209
 210     log_debug(DBG.HTTP_FULL, 'requesting: ' + str(mime))
 211
 212     hh = { 'User-Agent': ['hippotat'],
 213            'Content-Type': ['multipart/form-data; boundary="b"'],
 214            'Content-Length': [str(len(mime))] }
 215
 216     bytesreader = io.BytesIO(mime)
 217     producer = twisted.web.client.FileBodyProducer(bytesreader)
 218
 219     req = agent.request(b'POST',
 220                         c.url,
 221                         twisted.web.client.Headers(hh),
 222                         producer)
 223
 224     outstanding[req] = len(d)
 225     log_debug(DBG.HTTP_CTRL, 'request OS=%d' % len(outstanding), idof=req, d=d)
 226     req.addTimeout(c.http_timeout, reactor)
 227     req.addCallback(partial(req_ok, req))
 228     req.addErrback(partial(req_err, req))
 229
 230   log_outstanding()
 231
 232 common_startup()
 233 process_cfg()
 234 start_client()
 235 start_ipif(c.ipif_command, outbound)
 236 check_outbound()
 237 common_run()