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