mdw@git.distorted.org.uk Git - hippotat/blob - 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 = 0
  49
  50 def start_client():
  51   global queue
  52   global agent
  53   queue = PacketQueue('up', c.max_queue_time)
  54   agent = twisted.web.client.Agent(reactor, connectTimeout = c.http_timeout)
  55
  56 def outbound(packet, saddr, daddr):
  57   #print('OUT ', saddr, daddr, repr(packet))
  58   queue.append(packet)
  59   check_outbound()
  60
  61 class ResponseConsumer(twisted.internet.protocol.Protocol):
  62   def __init__(self):
  63     self._ssd = SlipStreamDecoder(queue_inbound)
  64   def dataReceived(self, data):
  65     try: self._ssd.inputdata(mime_translate(data))
  66     except Exception as e: asyncfailure(e)
  67   def connectionMade(self): pass
  68   def connectionLost(self, reason):
  69     if isinstance(reason, twisted.internet.error.ConnectionDone):
  70       try: self._ssd.flush()
  71       except Exception as e: asyncfailure(e)
  72     else:
  73       asyncfailure(reason)
  74
  75 def req_ok(resp):
  76   resp.deliverBody(ResponseConsumer())
  77   req_fin()
  78
  79 def req_err(err):
  80   print(err, file=sys.stderr)
  81   reactor.callLater(c.http_retry, req_fin)
  82
  83 def req_fin(*args):
  84   global outstanding
  85   outstanding -= 1
  86   check_outbound()
  87
  88 def asyncfailure(reason):
  89   global outstanding
  90   outstanding += 1
  91   req_err(reason)
  92
  93 def check_outbound():
  94   global outstanding
  95
  96   while True:
  97     if                          outstanding >= c.max_outstanding   : break
  98     if not queue.nonempty() and outstanding >= c.target_outstanding: break
  99
 100     d = b''
 101     def moredata(s): nonlocal d; d += s
 102     queue.process((lambda: len(d)),
 103                   moredata,
 104                   c.max_batch_up)
 105
 106     crlf = b'\r\n'
 107     lf   =   b'\n'
 108     mime = (b'--b'                                        + crlf +
 109             b'Content-Type: text/plain; charset="utf-8"'  + crlf +
 110             b'Content-Disposition: form-data; name="m"'   + crlf + crlf +
 111             str(c.client)             .encode('ascii')    + crlf +
 112             password                                      + crlf +
 113             str(c.target_outstanding) .encode('ascii')    + crlf +
 114           ((
 115             b'--b'                                        + crlf +
 116             b'Content-Type: application/octet-stream'     + crlf +
 117             b'Content-Disposition: form-data; name="d"'   + crlf + crlf +
 118             mime_translate(d)                             + crlf
 119            ) if len(d) else b'')                               +
 120             b'--b--'                                      + crlf)
 121
 122     #df = open('data.dump.dbg', mode='wb')
 123     #df.write(mime)
 124     #df.close()
 125     # POST -use -c 'multipart/form-data; boundary="b"' http://localhost:8099/ <data.dump.dbg
 126
 127     log_debug(DBG.HTTP_FULL, 'requesting: ' + str(mime))
 128
 129     hh = { 'User-Agent': ['hippotat'],
 130            'Content-Type': ['multipart/form-data; boundary="b"'],
 131            'Content-Length': [str(len(mime))] }
 132
 133     bytesreader = io.BytesIO(mime)
 134     producer = twisted.web.client.FileBodyProducer(bytesreader)
 135
 136     req = agent.request(b'POST',
 137                         c.url,
 138                         twisted.web.client.Headers(hh),
 139                         producer)
 140     req.addTimeout(c.http_timeout, reactor)
 141     req.addCallbacks(req_ok, req_err)
 142     outstanding += 1
 143
 144 common_startup()
 145 process_cfg()
 146 start_client()
 147 start_ipif(c.ipif_command, outbound)
 148 check_outbound()
 149 common_run()