aboutsummaryrefslogtreecommitdiff
blob: 58a44a1f19bfa7375d2e3fd986d9a1f4c5689f12 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
#!/usr/bin/env python
#-*- coding:utf-8 -*-

"""Mirrorselect 2.x
 Tool for selecting Gentoo source and rsync mirrors.

Copyright 2005-2012 Gentoo Foundation

	Copyright (C) 2005 Colin Kingsley <tercel@gentoo.org>
	Copyright (C) 2008 Zac Medico <zmedico@gentoo.org>
	Copyright (C) 2009 Sebastian Pipping <sebastian@pipping.org>
	Copyright (C) 2009 Christian Ruppert <idl0r@gentoo.org>
	Copyright (C) 2012 Brian Dolbec <dolsen@gentoo.org>

Distributed under the terms of the GNU General Public License v2
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, version 2 of the License.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.

"""

import math
import signal
import socket
import ssl
import subprocess
import sys
import time
import hashlib

if sys.version_info[0] >= 3:
	import urllib.request, urllib.parse, urllib.error
	url_parse = urllib.parse.urlparse
	url_unparse = urllib.parse.urlunparse
	url_open = urllib.request.urlopen
	HTTPError = urllib.error.HTTPError
	import http.client
	IncompleteRead = http.client.IncompleteRead
else:
	import urllib2
	import urlparse
	url_parse = urlparse.urlparse
	url_unparse = urlparse.urlunparse
	url_open = urllib2.urlopen
	HTTPError = urllib2.HTTPError
	import httplib
	IncompleteRead = httplib.IncompleteRead


from mirrorselect.output import encoder, get_encoding, decode_selection


class Shallow(object):
	"""handles rapid server selection via netselect"""

	def __init__(self, hosts, options, output):
		self.output = output
		self.urls = []

		if options.blocksize is not None:
			self.netselect_split(hosts, options.servers,
					options.blocksize)
		else:
			self.netselect(hosts, options.servers)

		if len(self.urls) == 0:
			self.output.print_err('Netselect failed to return any mirrors.'
					' Try again using block mode.')


	def netselect(self, hosts, number, quiet=False):
		"""
		Uses Netselect to choose the closest hosts, _very_ quickly
		"""
		if not quiet:
			hosts = [host[0] for host in hosts]
		top_host_dict = {}
		top_hosts = []

		if not quiet:
			self.output.print_info('Using netselect to choose the top '
				'%d mirrors...' % number)

		host_string = ' '.join(hosts)

		self.output.write('\nnetselect(): running "netselect -s%d %s"\n'
			% (int(number), host_string), 2)

		proc = subprocess.Popen( ['netselect', '-s%d' % (number,)] + hosts,
			stdout=subprocess.PIPE, stderr=subprocess.PIPE)

		out, err = proc.communicate()

		if err:
			self.output.write('netselect(): netselect stderr: %s\n' % err, 2)

		for line in out.splitlines():
			line = line.split()
			if len(line) < 2:
				continue
			top_hosts.append(line[1])
			top_host_dict[line[0]] = line[1]

		if not quiet:
			self.output.write('Done.\n')

		self.output.write('\nnetselect(): returning %s and %s\n' % (top_hosts,
			top_host_dict), 2)

		if quiet:
			return top_hosts, top_host_dict
		else:
			self.urls = top_hosts


	def netselect_split(self, hosts, number, block_size):
		"""
		This uses netselect to test mirrors in chunks,
		each at most block_size in length.
		This is done in a tournament style.
		"""
		hosts = [host[0] for host in hosts]

		self.output.write('netselect_split() got %s hosts.\n' % len(hosts), 2)

		host_blocks = self.host_blocks(hosts, block_size)

		self.output.write(' split into %s blocks\n' % len(host_blocks), 2)

		top_hosts = []
		ret_hosts = {}

		block_index = 0
		for block in host_blocks:
			self.output.print_info('Using netselect to choose the top '
			'%d hosts, in blocks of %s. %s of %s blocks complete.'
			% (number, block_size, block_index, len(host_blocks)))

			host_dict = self.netselect(block, len(block), quiet=True)[1]

			self.output.write('ran netselect(%s, %s), and got %s\n'
				% (block, len(block), host_dict), 2)

			for key in list(host_dict.keys()):
				ret_hosts[key] = host_dict[key]
			block_index += 1

		sys.stderr.write('\rUsing netselect to choose the top'
		'%d hosts, in blocks of %s. %s of %s blocks complete.\n'
		% (number, block_size, block_index, len(host_blocks)))

		host_ranking_keys = list(ret_hosts.keys())
		host_ranking_keys.sort()

		for rank in host_ranking_keys[:number]:
			top_hosts.append(ret_hosts[rank])

		self.output.write('netselect_split(): returns %s\n' % top_hosts, 2)

		self.urls = top_hosts


	def host_blocks(self, hosts, block_size):
		"""
		Takes a list of hosts and a block size,
		and returns an list of lists of URLs.
		Each of the sublists is at most block_size in length.
		"""
		host_array = []
		mylist = []

		while len(hosts) > block_size:
			while (len(mylist) < block_size):
				mylist.append(hosts.pop())
			host_array.append(mylist)
			mylist = []
		host_array.append(hosts)

		self.output.write('\n_host_blocks(): returns '
			'%s blocks, each about %s in size\n'
			% (len(host_array), len(host_array[0])), 2)

		return host_array


class TimeoutException(Exception):
	pass


def timeout_handler(signum, frame):
	raise TimeoutException()


class Deep(object):
	"""handles deep mode mirror selection."""

	def __init__(self, hosts, options, output):
		self.output = output
		self.urls = []
		self._hosts = hosts
		self._number = options.servers
		self._dns_timeout = options.timeout
		self._connect_timeout = options.timeout
		self._download_timeout = options.timeout
		self.test_file = options.file
		self.test_md5 = options.md5

		addr_families = []
		if options.ipv4:
			addr_families.append(socket.AF_INET)
		elif options.ipv6:
			addr_families.append(socket.AF_INET6)
		else:
			addr_families.append(socket.AF_UNSPEC)

		self._addr_families = addr_families

		self.deeptest()

	def deeptest(self):
		"""
		Takes a list of hosts and returns the fastest, using _deeptime()
		Doesn't waste time finnishing a test that has already taken longer than
		the slowest mirror weve already got.
		"""
		top_hosts = {}
		prog = 0
		maxtime = self._download_timeout
		hosts = [host[0] for host in self._hosts]
		num_hosts = len(hosts)
		self.dl_failures = 0

		for host in hosts:

			prog += 1
			if self.test_file is not 'mirrorselect-test':
				self.output.print_info(
					'Downloading %s files from each mirror... [%s of %s]'
					% (self.test_file, prog, num_hosts) )
			else:
				self.output.print_info(
					'Downloading 100k files from each mirror... [%s of %s]'
					% (prog, num_hosts) )

			mytime, ignore = self.deeptime(host, maxtime)

			if not ignore and mytime < maxtime:
				maxtime, top_hosts = self._list_add((mytime, host), \
						maxtime, top_hosts, self._number)
			else:
				continue

		self.output.write('deeptest(): got %s hosts, and returned %s\n'
			% (num_hosts, str(list(top_hosts.values()))), 2)

		self.output.write('\n')	#this just makes output nicer

		#can't just return the dict.values,
		#because we want the fastest mirror first...
		keys = list(top_hosts.keys())
		keys.sort()

		rethosts = []
		for key in keys:
			#self.output.write('deeptest(): adding rethost '
				#'%s, %s' % (key, top_hosts[key]), 2)
			rethosts.append(top_hosts[key])

		self.output.write('deeptest(): final rethost %s\n' % (rethosts), 2)
		self.output.write('deeptest(): final md5 failures %s of %s\n'
			% (self.dl_failures, num_hosts), 2)
		self.urls = rethosts


	def deeptime(self, url, maxtime):
		"""
		Takes a single url and fetch command, and downloads the test file.
		Can be given an optional timeout, for use with a clever algorithm.
		Like mine.
		"""
		self.output.write('\n_deeptime(): maxtime is %s\n' % maxtime, 2)

		if url.endswith('/'):	#append the path to the testfile to the URL
			url = url + 'distfiles/' + self.test_file
		else:
			url = url + '/distfiles/' + self.test_file

		url_parts = url_parse(url)

		signal.signal(signal.SIGALRM, timeout_handler)

		ips = []
		for addr_family in self._addr_families:
			try:
				try:
					signal.alarm(self._dns_timeout)
					for result in socket.getaddrinfo(
						url_parts.hostname, None, addr_family,
						socket.SOCK_STREAM, 0, socket.AI_ADDRCONFIG):
						family, _, __, ___, sockaddr = result
						ip = sockaddr[0]
						if family == socket.AF_INET6:
							ip = "[%s]" % ip
						ips.append(ip)
				finally:
					signal.alarm(0)
			except socket.error as e:
				self.output.write('deeptime(): dns error for host %s: %s\n'
					% (url_parts.hostname, e), 2)
			except TimeoutException:
				self.output.write('deeptime(): dns timeout for host %s\n'
					% url_parts.hostname, 2)

		if not ips:
			self.output.write('deeptime(): unable to resolve ip for host %s\n'
				% url_parts.hostname, 2)
			return (None, True)

		self.output.write("deeptime(): ip's for host %s: %s\n"
			% (url_parts.hostname, str(ips)), 2)
		delta = 0
		f = None

		for ip in ips:
			test_parts = url_parts._replace(netloc=ip)
			test_url = url_unparse(test_parts)
			self.output.write('deeptime(): testing url: %s\n' % test_url, 2)

			f, test_url, early_out = self._test_connection(test_url, url_parts,
				ip, ips[ips.index(ip):])
			if early_out:
				break

		if f is None:
			self.output.write('deeptime(): unable to ' + \
				'connect to host %s\n' % \
				(url_parts.hostname,), 2)
			return (None, True)

		try:
			# Close the initial "wake up" connection.
			try:
				signal.alarm(self._connect_timeout)
				f.close()
			finally:
				signal.alarm(0)
		except EnvironmentError as e:
			self.output.write(('deeptime(): closing connection to host %s '
				'failed for ip %s: %s\n') % (url_parts.hostname, ip, e), 2)
		except TimeoutException:
			self.output.write(('deeptime(): closing connection to host %s '
				'timed out for ip %s\n') % (url_parts.hostname, ip), 2)

		self.output.write('deeptime(): timing url: %s\n' % test_url, 2)
		try:
			# The first connection serves to "wake up" the route between
			# the local and remote machines. A second connection is used
			# for the timed run.
			try:
				signal.alarm(int(math.ceil(maxtime)))
				stime = time.time()
				f = url_open(test_url)

				md5 = hashlib.md5(f.read()).hexdigest()

				delta = time.time() - stime
				f.close()
				if md5 != self.test_md5:
					self.output.write(
						"\ndeeptime(): md5sum error for file: %s\n"
						% self.test_file +
						"         expected: %s\n" % self.test_md5 +
						"         got.....: %s\n" % md5 +
						"         host....: %s, %s\n"
						% (url_parts.hostname, ip))
					self.dl_failures += 1
					return (None, True)

			finally:
				signal.alarm(0)

		except EnvironmentError as e:
			self.output.write(('\ndeeptime(): download from host %s '
				'failed for ip %s: %s\n') % (url_parts.hostname, ip, e), 2)
			return (None, True)
		except TimeoutException:
			self.output.write(('\ndeeptime(): download from host %s '
				'timed out for ip %s\n') % (url_parts.hostname, ip), 2)
			return (None, True)
		except IncompleteRead as e:
			self.output.write(('\ndeeptime(): download from host %s '
				'failed for ip %s: %s\n') % (url_parts.hostname, ip, e), 2)
			return (None, True)

		signal.signal(signal.SIGALRM, signal.SIG_DFL)

		self.output.write('deeptime(): download completed.\n', 2)
		self.output.write('deeptime(): %s seconds for host %s\n'
			% (delta, url), 2)
		return (delta, False)


	def _test_connection(self, test_url, url_parts, ip, ips):
		"""Tests the url for a connection, will recurse using
		the original url instead of the ip if an HTTPError occurs
		Returns f, test_url, early_out
		"""
		early_out = False
		f = None
		try:
			try:
				signal.alarm(self._connect_timeout)
				f = url_open(test_url)
				early_out = True
			finally:
				signal.alarm(0)
		except HTTPError as e:
			self.output.write('deeptime(): connection to host %s\n'
				'            returned HTTPError: %s for ip %s\n'
				'            Switching back to original url\n'
				% (url_parts.hostname, e, ip), 2)
			if len(ips) == 1:
				test_url = url_unparse(url_parts)
				return self._test_connection(test_url, url_parts, ip, [])
		except (EnvironmentError, ssl.CertificateError) as e:
			self.output.write('deeptime(): connection to host %s '
				'failed for ip %s:\n            %s\n'
				% (url_parts.hostname, ip, e), 2)
		except TimeoutException:
			self.output.write(('deeptime(): connection to host %s '
				'timed out for ip %s\n') % (url_parts.hostname, ip), 2)
		return f, test_url, early_out


	def _list_add(self, time_host, maxtime, host_dict, maxlen):
		"""
		Takes argumets ((time, host), maxtime, host_dict, maxlen)
		Adds a new time:host pair to the dictionary of top hosts.
		If the dictionary is full, the slowest host is removed to make space.
		Returns the new maxtime, be it the specified timeout,
		or the slowest host.
		"""
		if len(host_dict) < maxlen:	#still have room, and host is fast. add it.

			self.output.write('_list_add(): added host %s. with a time of %s\n'
				% (time_host[1], time_host[0]), 2)

			host_dict.update(dict([time_host]))
			times = list(host_dict.keys())
			times.sort()

		else: #We need to make room in the dict before we add. Kill the slowest.
			self.output.write('_list_add(): Adding host %s with a time of %s\n'
				% (time_host[1], time_host[0]), 2)
			times = list(host_dict.keys())
			times.sort()
			self.output.write('_list_add(): removing %s\n'
				% host_dict[times[-1]], 2)
			del host_dict[times[-1]]
			host_dict.update(dict([time_host]))
			#done adding. now return the appropriate time
			times = list(host_dict.keys())
			times.sort()

		if len(host_dict) < maxlen:	#check again to choose new timeout
			self.output.write('_list_add(): host_dict is not full yet.'
					' reusing timeout of %s sec.\n' % maxtime, 2)
			retval = maxtime
		else:
			self.output.write('_list_add(): host_dict is full. '
				'Selecting the best timeout\n', 2)
			if times[-1] < maxtime:
				retval = times[-1]
			else:
				retval = maxtime

		self.output.write('_list_add(): new max time is %s seconds,'
				' and now len(host_dict)= %s\n' % (retval, len(host_dict)), 2)

		return retval, host_dict


class Interactive(object):
	"""Handles interactive host selection."""

	def __init__(self, hosts, options, output):
		self.output = output
		self.urls = []

		self.interactive(hosts, options)
		self.output.write('Interactive.interactive(): self.urls = %s\n'
			% self.urls, 2)

		if not self.urls or len(self.urls[0]) == 0:
			sys.exit(1)


	def interactive(self, hosts, options):
		"""
		Some sort of interactive menu thingy.
		"""
		if options.rsync:
			dialog = ['dialog', '--stdout', '--title', '"Gentoo RSYNC Mirrors"',
				'--radiolist', '"Please select your desired mirror:"',
				'20', '110', '14']
		else:
			dialog = ['dialog', '--separate-output', '--stdout', '--title',
				'"Gentoo Download Mirrors"', '--checklist',
				'"Please select your desired mirrors:']
			if not options.ipv4 and not options.ipv6:
				dialog[-1] += '\n* = supports ipv6'

			dialog.extend(['20', '110', '14'])

		for (url, args) in sorted(hosts, key = lambda x:
				(x[1]['country'].lower(), x[1]['name'].lower()) ):
			marker = ""
			if options.rsync and not url.endswith("/gentoo-portage"):
				url+="/gentoo-portage"
			if (not options.ipv6 and not options.ipv4) and args['ipv6'] == 'y':
				marker = "* "
			if options.ipv6 and ( args['ipv6'] == 'n' ): continue
			if options.ipv4 and ( args['ipv4'] == 'n' ): continue

			#dialog.append('"%s" "%s%s: %s" "OFF"'
				#% ( url, marker, args['country'], args['name']))
			dialog.extend(["%s" %url,
				"%s%s: %s" %(marker, args['country'], args['name']),
				 "OFF"])
		dialog = [encoder(x, get_encoding(sys.stdout)) for x in dialog]
		proc = subprocess.Popen( dialog,
			stdout=subprocess.PIPE, stderr=subprocess.PIPE)

		out, err = proc.communicate()

		self.urls = out.splitlines()

		if self.urls:
			if hasattr(self.urls[0], 'decode'):
				self.urls = decode_selection(
					[x.decode('utf-8').rstrip() for x in self.urls])
			else:
				self.urls = decode_selection([x.rstrip() for x in self.urls])