implement bandwidth throttling, fixes #189
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defbbf290f
commit
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3 changed files with 76 additions and 27 deletions
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@ -1,3 +1,6 @@
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from time import time
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import settings
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import state
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from websocket import trigger_event
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@ -5,25 +8,76 @@ import logging
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logger = logging.getLogger(__name__)
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class Bandwidth(object):
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up = 0
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down = 0
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_last = {}
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def __init__(self):
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self._upload = Bucket('uploadRate')
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self._download = Bucket('downloadRate')
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self.update()
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def update(self):
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bandwidth = {'up': self.up, 'down': self.down}
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bandwidth = {
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'up': self._upload.rate,
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'down': self._download.rate
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}
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if bandwidth != self._last:
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trigger_event('bandwidth', bandwidth)
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self._last = bandwidth
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self.up = 0
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self.down = 0
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state.main.call_later(1, self.update)
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def download(self, amount):
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self.down += amount
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return self._download.consume(amount)
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def upload(self, amount):
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self.up += amount
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return self._upload.consume(amount)
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class Bucket(object):
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_rate = 0
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fill_rate = None
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def __init__(self, pref):
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self._pref = pref
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self.update()
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self.timestamp = time()
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self.rate_timestamp = time()
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def update(self):
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rate = settings.preferences.get(self._pref, '')
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if rate and rate.isdigit():
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rate = max(float(rate) * 1024, 0)
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if rate != self.fill_rate:
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self.capacity = max(rate, 2*16*1024)
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self._tokens = rate
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self.fill_rate = rate
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else:
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self.fill_rate = None
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def consume(self, tokens):
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self.update()
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if self.fill_rate is None:
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self._rate += tokens
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return True
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if tokens <= self.tokens:
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self._tokens -= tokens
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self._rate += tokens
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else:
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return False
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return True
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def get_tokens(self):
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now = time()
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if self._tokens < self.capacity:
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delta = self.fill_rate * (now - self.timestamp)
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self._tokens = min(self.capacity, self._tokens + delta)
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self.timestamp = now
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return self._tokens
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tokens = property(get_tokens)
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def get_rate(self):
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now = time()
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rate = self._rate * (now - self.rate_timestamp)
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self._rate = 0
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self.rate_timestamp = now
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return rate
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rate = property(get_rate)
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@ -1,6 +1,5 @@
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# -*- coding: utf-8 -*-
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# vi:si:et:sw=4:sts=4:ts=4
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from datetime import datetime
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from socketserver import ThreadingMixIn
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from threading import Thread
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import base64
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@ -12,6 +11,7 @@ import json
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import os
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import socket
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import socketserver
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import time
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from Crypto.PublicKey import RSA
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from Crypto.Util.asn1 import DerSequence
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@ -70,6 +70,7 @@ class TLSTCPServer(socketserver.TCPServer):
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pass
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class NodeServer(ThreadingMixIn, TLSTCPServer):
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_running = True
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allow_reuse_address = True
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@ -151,19 +152,18 @@ class Handler(http.server.SimpleHTTPRequestHandler):
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self.send_header('X-Node-Protocol', settings.NODE_PROTOCOL)
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self.send_header('Content-Length', str(os.path.getsize(path)))
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self.end_headers()
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ct = datetime.utcnow()
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chunk_size = 16*1024
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with open(path, 'rb') as f:
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size = 0
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while 1:
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data = f.read(16384)
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data = f.read(chunk_size)
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if not data:
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break
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size += len(data)
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self.wfile.write(data)
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if state.bandwidth:
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since_ct = (datetime.utcnow() - ct).total_seconds()
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state.bandwidth.upload(size/since_ct)
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size = 0
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while not state.bandwidth.upload(chunk_size) and self.server._running:
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time.sleep(0.1)
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else:
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self.send_response(200, 'OK')
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self.send_header('Content-type', 'text/plain')
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@ -278,6 +278,7 @@ class Server(Thread):
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def stop(self):
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if self.http_server:
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self.http_server._running = False
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self.http_server.shutdown()
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self.http_server.socket.close()
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return Thread.join(self)
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20
oml/nodes.py
20
oml/nodes.py
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@ -312,7 +312,7 @@ class Node(Thread):
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logger.debug('download %s', url)
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self._opener.addheaders = list(zip(self.headers.keys(), self.headers.values()))
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try:
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r = self._opener.open(url, timeout=self.TIMEOUT*2)
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r = self._opener.open(url, timeout=self.TIMEOUT*5)
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except:
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logger.debug('openurl failed %s', url, exc_info=1)
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return False
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@ -324,7 +324,8 @@ class Node(Thread):
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content = b''
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ct = datetime.utcnow()
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size = 0
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for chunk in iter(lambda: fileobj.read(16*1024), b''):
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chunk_size = 16*1024
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for chunk in iter(lambda: fileobj.read(chunk_size), b''):
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content += chunk
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size += len(chunk)
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since_ct = (datetime.utcnow() - ct).total_seconds()
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@ -335,25 +336,18 @@ class Node(Thread):
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# transfer was canceled
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return False
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else:
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t.progress = len(content) / item.info['size']
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t.progress = size / item.info['size']
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t.save()
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trigger_event('transfer', {
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'id': item.id, 'progress': t.progress
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})
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if state.bandwidth:
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state.bandwidth.download(size/since_ct)
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size = 0
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'''
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content = fileobj.read()
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'''
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if state.bandwidth:
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state.bandwidth.download(size/since_ct)
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size = 0
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while not state.bandwidth.download(chunk_size) and self._running:
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time.sleep(0.1)
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t2 = datetime.utcnow()
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duration = (t2-t1).total_seconds()
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if duration:
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self.download_speed = len(content) / duration
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self.download_speed = size / duration
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return item.save_file(content)
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except:
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logger.debug('download failed %s', url, exc_info=1)
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