← Back to branch summary

~bzr-pqm/bzr/bzr.dev

« back to all changes in this revision

Viewing changes to effbot/org/http_manager.py

  • Committer: Martin Pool
  • Date: 2005-05-15 02:36:04 UTC
  • Revision ID: mbp@sourcefrog.net-20050515023603-7328f6cbabd2b09a
- Merge aaron's merge command

Show diffs side-by-side

added added

removed removed

Lines of Context:
effbot/org/http_manager.py
1
 
# $Id: http_manager.py 270 2004-10-09 10:38:54Z fredrik $
2
 
# effnews http
3
 
#
4
 
# manage a set of http clients
5
 
#
6
 
# Copyright (c) 2001-2004 by Fredrik Lundh.  All rights reserved.
7
 
#
8
 
 
9
 
import asyncore, time
10
 
import http_client
11
 
 
12
 
class http_manager:
13
 
 
14
 
    max_connections = 8
15
 
    max_size = 1000000
16
 
    max_time = 60
17
 
 
18
 
    def __init__(self):
19
 
        self.queue = []
20
 
 
21
 
    def request(self, uri, consumer, extra_headers=None):
22
 
        self.queue.append((uri, consumer, extra_headers))
23
 
 
24
 
    def priority_request(self, uri, consumer, extra_headers=None):
25
 
        self.queue.insert(0, (uri, consumer, extra_headers))
26
 
 
27
 
    def purge(self):
28
 
        for channel in asyncore.socket_map.values():
29
 
            channel.close()
30
 
        del self.queue[:]
31
 
 
32
 
    def prioritize(self, priority_uri):
33
 
        i = 0
34
 
        for uri, consumer, extra_headers in self.queue:
35
 
            if uri == priority_uri:
36
 
                del self.queue[i]
37
 
                self.priority_request(uri, consumer, extra_headers)
38
 
                return
39
 
            i = i + 1
40
 
 
41
 
    def poll(self, timeout=0.1):
42
 
        # sanity checks
43
 
        now = time.time()
44
 
        for channel in asyncore.socket_map.values():
45
 
            if channel.bytes_in > self.max_size:
46
 
                channel.close() # too much data
47
 
                try:
48
 
                    channel.consumer.http(
49
 
                        0, channel, ("HTTPManager", "too much data", None)
50
 
                        )
51
 
                except:
52
 
                    pass
53
 
            if channel.timestamp and now - channel.timestamp > self.max_time:
54
 
                channel.close() # too slow
55
 
                try:
56
 
                    channel.consumer.http(
57
 
                        0, channel, ("HTTPManager", "timeout", None)
58
 
                        )
59
 
                except:
60
 
                    pass
61
 
        # activate up to max_connections channels
62
 
        while self.queue and len(asyncore.socket_map) < self.max_connections:
63
 
            http_client.do_request(*self.queue.pop(0))
64
 
        # keep the network running
65
 
        asyncore.poll(timeout)
66
 
        # return non-zero if we should keep on polling
67
 
        return len(self.queue) or len(asyncore.socket_map)