chiark / gitweb /
467afd60885ce5c50e4ccb5aa751af4307b3834a
[hippotat.git] / 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, req):
63     self._req = req
64     self._ssd = SlipStreamDecoder(queue_inbound)
65     self._log(DBG.HTTP_CTRL, '__init__')
66
67   def _log(self, dflag, msg, **kwargs):
68     log_debug(dflag, 'RC ' + msg, idof=self._req, **kwargs)
69
70   def dataReceived(self, data):
71     try: self._ssd.inputdata(mime_translate(data))
72     except Exception as e: asyncfailure(e)
73
74   def connectionMade(self):
75     self._log(DBG.HTTP_CTRL, 'connectionMade')
76
77   def connectionLost(self, reason):
78     self._log(DBG.HTTP_CTRL, 'connectionLost')
79     if isinstance(reason, twisted.internet.error.ConnectionDone):
80       try: self._ssd.flush()
81       except Exception as e: asyncfailure(e)
82     else:
83       asyncfailure(reason)
84
85 def req_ok(req, resp):
86   rc = ResponseConsumer(req)
87   resp.deliverBody(rc)
88   req_fin()
89
90 def req_err(err):
91   print(err, file=sys.stderr)
92   reactor.callLater(c.http_retry, req_fin)
93
94 def req_fin(*args):
95   global outstanding
96   outstanding -= 1
97   check_outbound()
98
99 def asyncfailure(reason):
100   global outstanding
101   outstanding += 1
102   req_err(reason)
103
104 def check_outbound():
105   global outstanding
106
107   while True:
108     if                          outstanding >= c.max_outstanding   : break
109     if not queue.nonempty() and outstanding >= c.target_outstanding: break
110
111     d = b''
112     def moredata(s): nonlocal d; d += s
113     queue.process((lambda: len(d)),
114                   moredata,
115                   c.max_batch_up)
116     
117     d = mime_translate(d)
118
119     crlf = b'\r\n'
120     lf   =   b'\n'
121     mime = (b'--b'                                        + crlf +
122             b'Content-Type: text/plain; charset="utf-8"'  + crlf +
123             b'Content-Disposition: form-data; name="m"'   + crlf + crlf +
124             str(c.client)             .encode('ascii')    + crlf +
125             password                                      + crlf +
126             str(c.target_outstanding) .encode('ascii')    + crlf +
127           ((
128             b'--b'                                        + crlf +
129             b'Content-Type: application/octet-stream'     + crlf +
130             b'Content-Disposition: form-data; name="d"'   + crlf + crlf +
131             d                                             + crlf
132            ) if len(d) else b'')                               +
133             b'--b--'                                      + crlf)
134
135     #df = open('data.dump.dbg', mode='wb')
136     #df.write(mime)
137     #df.close()
138     # POST -use -c 'multipart/form-data; boundary="b"' http://localhost:8099/ <data.dump.dbg
139
140     log_debug(DBG.HTTP_FULL, 'requesting: ' + str(mime))
141
142     hh = { 'User-Agent': ['hippotat'],
143            'Content-Type': ['multipart/form-data; boundary="b"'],
144            'Content-Length': [str(len(mime))] }
145
146     bytesreader = io.BytesIO(mime)
147     producer = twisted.web.client.FileBodyProducer(bytesreader)
148
149     req = agent.request(b'POST',
150                         c.url,
151                         twisted.web.client.Headers(hh),
152                         producer)
153     req.addTimeout(c.http_timeout, reactor)
154     req.addCallback((lambda resp: req_ok(req, resp)))
155     req.addErrback(req_err)
156     outstanding += 1
157
158 common_startup()
159 process_cfg()
160 start_client()
161 start_ipif(c.ipif_command, outbound)
162 check_outbound()
163 common_run()