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 class GeneralResponseConsumer(twisted.internet.protocol.Protocol):
  11   def __init__(self, cl, req, desc):
  12     self._cl = cl
  13     self._req = req
  14     self._desc = desc
  15
  16   def _log(self, dflag, msg, **kwargs):
  17     self._cl.log(dflag, '%s: %s' % (self._desc, msg), idof=self._req, **kwargs)
  18
  19   def connectionMade(self):
  20     self._log(DBG.HTTP_CTRL, 'connectionMade')
  21
  22 class ResponseConsumer(GeneralResponseConsumer):
  23   def __init__(self, cl, req):
  24     super().__init__(cl, req, 'RC')
  25     ssddesc = '[%s] %s' % (id(req), self._desc)
  26     self._ssd = SlipStreamDecoder(ssddesc, cl.queue_inbound)
  27     self._log(DBG.HTTP_CTRL, '__init__')
  28     self._success_reported = False
  29
  30   def dataReceived(self, data):
  31     self._log(DBG.HTTP, 'dataReceived', d=data)
  32     try:
  33       self._ssd.inputdata(data)
  34     except Exception as e:
  35       self._handleexception()
  36
  37   def connectionLost(self, reason):
  38     self._log(DBG.HTTP_CTRL, 'connectionLost ' + str(reason))
  39     if not reason.check(twisted.web.client.ResponseDone):
  40       self.latefailure()
  41       return
  42     try:
  43       self._log(DBG.HTTP, 'ResponseDone')
  44       self._ssd.flush()
  45       self._cl.req_fin(self._req)
  46     except Exception as e:
  47       self._handleexception()
  48     if not self._success_reported:
  49       log.info(cl.desc + 'running OK', dflag=False)
  50       self._success_reported = True
  51
  52   def _handleexception(self):
  53     self._latefailure(traceback.format_exc())
  54
  55   def _latefailure(self, reason):
  56     self._log(DBG.HTTP_CTRL, '_latefailure ' + str(reason))
  57     self._cl.req_err(self._req, reason)
  58
  59 class ErrorResponseConsumer(GeneralResponseConsumer):
  60   def __init__(self, cl, req, resp):
  61     super().__init__(cl, req, 'ERROR-RC')
  62     self._resp = resp
  63     self._m = b''
  64     try:
  65       self._phrase = resp.phrase.decode('utf-8')
  66     except Exception:
  67       self._phrase = repr(resp.phrase)
  68     self._log(DBG.HTTP_CTRL, '__init__ %d %s' % (resp.code, self._phrase))
  69
  70   def dataReceived(self, data):
  71     self._log(DBG.HTTP_CTRL, 'dataReceived ' + repr(data))
  72     self._m += data
  73
  74   def connectionLost(self, reason):
  75     try:
  76       mbody = self._m.decode('utf-8')
  77     except Exception:
  78       mbody = repr(self._m)
  79     if not reason.check(twisted.web.client.ResponseDone):
  80       mbody += ' || ' + str(reason)
  81     self._cl.req_err(self._req,
  82             "FAILED %d %s | %s"
  83             % (self._resp.code, self._phrase, mbody))
  84
  85 class Client():
  86   def __init__(cl, c,ss,cs):
  87     cl.c = c
  88     cl.outstanding = { }
  89     cl.desc = '[%s %s] ' % (ss,cs)
  90     log.info(cl.desc + 'setting up', dflag=False)
  91
  92   def log(cl, dflag, msg, **kwargs):
  93     log_debug(dflag, cl.desc + msg, **kwargs)
  94
  95   def log_outstanding(cl):
  96     cl.log(DBG.CTRL_DUMP, 'OS %s' % cl.outstanding)
  97
  98   def start(cl):
  99     cl.queue = PacketQueue('up', cl.c.max_queue_time)
 100     cl.agent = twisted.web.client.Agent(
 101       reactor, connectTimeout = cl.c.http_timeout)
 102
 103   def outbound(cl, packet, saddr, daddr):
 104     #print('OUT ', saddr, daddr, repr(packet))
 105     cl.queue.append(packet)
 106     cl.check_outbound()
 107
 108   def req_ok(cl, req, resp):
 109     cl.log(DBG.HTTP_CTRL,
 110             'req_ok %d %s %s' % (resp.code, repr(resp.phrase), str(resp)),
 111             idof=req)
 112     if resp.code == 200:
 113       rc = ResponseConsumer(cl, req)
 114     else:
 115       rc = ErrorResponseConsumer(cl, req, resp)
 116
 117     resp.deliverBody(rc)
 118     # now rc is responsible for calling req_fin
 119
 120   def req_err(cl, req, err):
 121     # called when the Deferred fails, or (if it completes),
 122     # later, by ResponsConsumer or ErrorResponsConsumer
 123     try:
 124       cl.log(DBG.HTTP_CTRL, 'req_err ' + str(err), idof=req)
 125       if isinstance(err, twisted.python.failure.Failure):
 126         err = err.getTraceback()
 127       print('[%#x] %s' % (id(req), err), file=sys.stderr)
 128       if not isinstance(cl.outstanding[req], int):
 129         raise RuntimeError('[%#x] previously %s' %
 130                            (id(req), cl.outstanding[req]))
 131       cl.outstanding[req] = err
 132       cl.log_outstanding()
 133       reactor.callLater(cl.c.http_retry, partial(cl.req_fin, req))
 134     except Exception as e:
 135       crash(traceback.format_exc() + '\n----- handling -----\n' + err)
 136
 137   def req_fin(cl, req):
 138     del cl.outstanding[req]
 139     cl.log(DBG.HTTP_CTRL, 'req_fin OS=%d' % len(cl.outstanding), idof=req)
 140     cl.check_outbound()
 141
 142   def check_outbound(cl):
 143     while True:
 144       if len(cl.outstanding) >= cl.c.max_outstanding:
 145         break
 146
 147       if (not cl.queue.nonempty() and
 148           len(cl.outstanding) >= cl.c.target_requests_outstanding):
 149         break
 150
 151       d = b''
 152       def moredata(s): nonlocal d; d += s
 153       cl.queue.process((lambda: len(d)),
 154                     moredata,
 155                     cl.c.max_batch_up)
 156
 157       d = mime_translate(d)
 158
 159       crlf = b'\r\n'
 160       lf   =   b'\n'
 161       mime = (b'--b'                                        + crlf +
 162               b'Content-Type: text/plain; charset="utf-8"'  + crlf +
 163               b'Content-Disposition: form-data; name="m"'   + crlf + crlf +
 164               str(cl.c.client)            .encode('ascii')  + crlf +
 165               cl.c.password                                 + crlf +
 166               str(cl.c.target_requests_outstanding)
 167                                           .encode('ascii')  + crlf +
 168               str(cl.c.http_timeout)      .encode('ascii')  + crlf +
 169             ((
 170               b'--b'                                        + crlf +
 171               b'Content-Type: application/octet-stream'     + crlf +
 172               b'Content-Disposition: form-data; name="d"'   + crlf + crlf +
 173               d                                             + crlf
 174              ) if len(d) else b'')                               +
 175               b'--b--'                                      + crlf)
 176
 177       #df = open('data.dump.dbg', mode='wb')
 178       #df.write(mime)
 179       #df.close()
 180       # POST -use -c 'multipart/form-data; boundary="b"' http://localhost:8099/ <data.dump.dbg
 181
 182       cl.log(DBG.HTTP_FULL, 'requesting: ' + str(mime))
 183
 184       hh = { 'User-Agent': ['hippotat'],
 185              'Content-Type': ['multipart/form-data; boundary="b"'],
 186              'Content-Length': [str(len(mime))] }
 187
 188       bytesreader = io.BytesIO(mime)
 189       producer = twisted.web.client.FileBodyProducer(bytesreader)
 190
 191       req = cl.agent.request(b'POST',
 192                           cl.c.url,
 193                           twisted.web.client.Headers(hh),
 194                           producer)
 195
 196       cl.outstanding[req] = len(d)
 197       cl.log(DBG.HTTP_CTRL,
 198              'request OS=%d' % len(cl.outstanding),
 199              idof=req, d=d)
 200       req.addTimeout(cl.c.http_timeout, reactor)
 201       req.addCallback(partial(cl.req_ok, req))
 202       req.addErrback(partial(cl.req_err, req))
 203
 204     cl.log_outstanding()
 205
 206 clients = [ ]
 207
 208 def process_cfg(putative_servers, putative_clients):
 209   global clients
 210
 211   for ss in putative_servers.values():
 212     for (ci,cs) in putative_clients.items():
 213       c = ConfigResults()
 214
 215       sections = cfg_process_client_common(c,ss,cs,ci)
 216       if not sections: continue
 217
 218       def srch(getter,key): return cfg_search(getter,key,sections)
 219
 220       c.http_timeout   += srch(cfg.getint, 'http_timeout_grace')
 221       c.max_outstanding = srch(cfg.getint, 'max_requests_outstanding')
 222       c.max_batch_up    = srch(cfg.getint, 'max_batch_up')
 223       c.http_retry      = srch(cfg.getint, 'http_retry')
 224       c.max_queue_time  = srch(cfg.getint, 'max_queue_time')
 225       c.vroutes         = srch(cfg.get,    'vroutes')
 226
 227       try: c.url = srch(cfg.get,'url')
 228       except NoOptionError:
 229         cfg_process_saddrs(c, ss)
 230         c.url = c.saddrs[0].url()
 231
 232       c.client = ci
 233
 234       cfg_process_vaddr(c,ss)
 235
 236       cfg_process_ipif(c,
 237                        sections,
 238                        (('local','client'),
 239                         ('peer', 'vaddr'),
 240                         ('rnets','vroutes')))
 241
 242       clients.append(Client(c,ss,cs))
 243
 244 common_startup(process_cfg)
 245
 246 for cl in clients:
 247   cl.start()
 248   start_ipif(cl.c.ipif_command, cl.outbound)
 249   cl.check_outbound()
 250
 251 common_run()