chiark / gitweb /
wip, towards target
[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     self._log(DBG.HTTP_CTRL, 'dataReceived', d=data)
72     try:
73       self._ssd.inputdata(mime_translate(data))
74     except Exception as e:
75       self._asyncfailure(e)
76
77   def connectionMade(self):
78     self._log(DBG.HTTP_CTRL, 'connectionMade')
79
80   def connectionLost(self, reason):
81     self._log(DBG.HTTP_CTRL, 'connectionLost ' + str(reason))
82     if reason.check(twisted.web.client.ResponseDone):
83       try: self._ssd.flush()
84       except Exception as e:
85         self._asyncfailure(e)
86     else:
87       self._asyncfailure(reason)
88
89   def _asyncfailure(self, reason):
90     self._log(DBG.HTTP_CTRL, '_asyncFailure ' + str(reason))
91     global outstanding
92     outstanding += 1
93     req_err(self._req, reason)
94
95 def req_ok(req, resp):
96   log_debug(DBG.HTTP_CTRL, 'req_ok ' + str(resp), idof=req)
97   rc = ResponseConsumer(req)
98   resp.deliverBody(rc)
99   req_fin(req)
100
101 def req_err(req, err):
102   log_debug(DBG.HTTP_CTRL, 'req_err ' + str(err), idof=req)
103   print(err, file=sys.stderr)
104   reactor.callLater(c.http_retry, (lambda: req_fin(req)))
105
106 def req_fin(req):
107   log_debug(DBG.HTTP_CTRL, 'req_fin', idof=req)
108   global outstanding
109   outstanding -= 1
110   check_outbound()
111
112 def check_outbound():
113   global outstanding
114
115   while True:
116     if                          outstanding >= c.max_outstanding   : break
117     if not queue.nonempty() and outstanding >= c.target_outstanding: break
118
119     d = b''
120     def moredata(s): nonlocal d; d += s
121     queue.process((lambda: len(d)),
122                   moredata,
123                   c.max_batch_up)
124     
125     d = mime_translate(d)
126
127     crlf = b'\r\n'
128     lf   =   b'\n'
129     mime = (b'--b'                                        + crlf +
130             b'Content-Type: text/plain; charset="utf-8"'  + crlf +
131             b'Content-Disposition: form-data; name="m"'   + crlf + crlf +
132             str(c.client)             .encode('ascii')    + crlf +
133             password                                      + crlf +
134             str(c.target_outstanding) .encode('ascii')    + crlf +
135           ((
136             b'--b'                                        + crlf +
137             b'Content-Type: application/octet-stream'     + crlf +
138             b'Content-Disposition: form-data; name="d"'   + crlf + crlf +
139             d                                             + crlf
140            ) if len(d) else b'')                               +
141             b'--b--'                                      + crlf)
142
143     #df = open('data.dump.dbg', mode='wb')
144     #df.write(mime)
145     #df.close()
146     # POST -use -c 'multipart/form-data; boundary="b"' http://localhost:8099/ <data.dump.dbg
147
148     log_debug(DBG.HTTP_FULL, 'requesting: ' + str(mime))
149
150     hh = { 'User-Agent': ['hippotat'],
151            'Content-Type': ['multipart/form-data; boundary="b"'],
152            'Content-Length': [str(len(mime))] }
153
154     bytesreader = io.BytesIO(mime)
155     producer = twisted.web.client.FileBodyProducer(bytesreader)
156
157     req = agent.request(b'POST',
158                         c.url,
159                         twisted.web.client.Headers(hh),
160                         producer)
161
162     log_debug(DBG.HTTP_CTRL, 'request', idof=req, d=d)
163     req.addTimeout(c.http_timeout, reactor)
164     req.addCallback((lambda resp: req_ok(req, resp)))
165     req.addErrback((lambda err: req_err(req, err)))
166     outstanding += 1
167
168 common_startup()
169 process_cfg()
170 start_client()
171 start_ipif(c.ipif_command, outbound)
172 check_outbound()
173 common_run()