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
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
|
# author: Jonathan Dieter <jdieter@gmail.com>
#
# mostly taken from yumRepo.py (part of yum) with a few minor modifications
#
# 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; either version 2 of the License, or
# (at your option) any later version.
#
# 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 Library 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# Copyright 2005 Duke University
import os
import re
import time
import types
import urlparse
from yum import Errors
from urlgrabber.grabber import URLGrabber
import urlgrabber.mirror
from urlgrabber.grabber import URLGrabError
from yum.repos import Repository
from yum import repoMDObject
from yum import parser
from yum import config
from yum import misc
class PrestoRepository(Repository):
"""
This is an actual repository object
Configuration attributes are pulled in from config.RepoConf.
"""
def __init__(self, repo, conduit):
Repository.__init__(self, repo.id)
# If there's a specific deltarpm url, use that
is_different = False
if conduit.confString(repo.id, 'deltaurl'):
self.baseurl = [conduit.confString(repo.id, 'deltaurl')]
is_different = True
conduit.info(5, 'Manual url set from presto.conf: %s' % self.baseurl)
elif repo.deltaurl != []:
self.baseurl = repo.deltaurl
is_different = True
conduit.info(5, 'Manual url set from repository conf file: %s' % self.baseurl)
else:
self.baseurl = repo.baseurl
# If there's a specific mirrorlist, use that
if conduit.confString(repo.id, 'deltamirrorlist'):
self.mirrorlist = conduit.confString(repo.id, 'deltamirrorlist')
self.baseurl = None
is_different = True
conduit.info(5, 'Manual mirrorlist set from presto.conf: %s' % self.mirrorlist)
elif repo.deltamirrorlist != None:
self.mirrorlist = repo.deltamirrorlist
self.baseurl = None
is_different = True
conduit.info(5, 'Manual mirrorlist set from repository conf file: %s' % self.mirrorlist)
else:
if self.baseurl == repo.baseurl:
self.mirrorlist = repo.mirrorlist
else:
self.mirrorlist = None
self.conduit = conduit
self.urls = []
self.is_different = is_different
if is_different:
self.repoMDFile = 'repodata/prestomd.xml'
self.metadata_cookie_fn = 'presto_cachecookie'
else:
self.repoMDFile = 'repodata/repomd.xml'
self.metadata_cookie_fn = 'cachecookie'
self.repoXML = None
self.cache = 0
self.mirrorlistparsed = 0
self.yumvar = {} # empty dict of yumvariables for $string replacement
self._proxy_dict = {}
self.http_headers = {}
# throw in some stubs for things that will be set by the config class
self.basecachedir = ""
self.cachedir = ""
self.pkgdir = ""
self.hdrdir = ""
self.enabled = True
# holder for stuff we've grabbed
self.retrieved = { 'deltas':0 }
# callbacks
self.keepalive = repo.keepalive
self.bandwidth = repo.bandwidth
self.retries = repo.retries
self.throttle = repo.throttle
self.proxy = repo.proxy
self.proxy_username = repo.proxy_username
self.proxy_password = repo.proxy_password
self.timeout = repo.timeout
self.http_caching = repo.http_caching
self.failovermethod = repo.failovermethod
self.metadata_expire = repo.metadata_expire
self.basecachedir = repo.basecachedir
self.callback = repo.callback
self.failure_obj = repo.failure_obj
self.mirror_failure_obj = repo.mirror_failure_obj
self.interrupt_callback = repo.interrupt_callback
self.drpm_list = {}
self.parent = repo
repo.p_repo = self
def __getProxyDict(self):
self.doProxyDict()
if self._proxy_dict:
return self._proxy_dict
return None
# consistent access to how proxy information should look (and ensuring
# that it's actually determined for the repo)
proxy_dict = property(__getProxyDict)
def ready(self):
"""Returns true if this repository is setup and ready for use."""
return self.repoXML is not None
def __cmp__(self, other):
if self.id > other.id:
return 1
elif self.id < other.id:
return -1
else:
return 0
def __str__(self):
return self.id
def _checksum(self, sumtype, file, CHUNK=2**16):
"""takes filename, hand back Checksum of it
sumtype = md5 or sha
filename = /path/to/file
CHUNK=65536 by default"""
try:
return misc.checksum(sumtype, file, CHUNK)
except (Errors.MiscError, EnvironmentError), e:
raise Errors.RepoError, 'Error opening file for checksum: %s' % e
def dump(self):
output = '[%s]\n' % self.id
vars = ['id', 'bandwidth', 'enabled',
'keepalive', 'proxy',
'proxy_password', 'proxy_username',
'retries', 'throttle', 'timeout', 'mirrorlist',
'cachedir' ]
vars.sort()
for attr in vars:
output = output + '%s = %s\n' % (attr, getattr(self, attr))
output = output + 'baseurl ='
for url in self.urls:
output = output + ' %s\n' % url
return output
def check(self):
"""self-check the repo information - if we don't have enough to move
on then raise a repo error"""
if len(self.urls) < 1:
raise Errors.RepoError, \
'Cannot find a valid deltaurl for repo: %s' % self.id
def doProxyDict(self):
if self._proxy_dict:
return
self._proxy_dict = {} # zap it
proxy_string = None
if self.proxy not in [None, '_none_']:
proxy_string = '%s' % self.proxy
if self.proxy_username is not None:
proxy_parsed = urlparse.urlsplit(self.proxy, allow_fragments=0)
proxy_proto = proxy_parsed[0]
proxy_host = proxy_parsed[1]
proxy_rest = proxy_parsed[2] + '?' + proxy_parsed[3]
proxy_string = '%s://%s@%s%s' % (proxy_proto,
self.proxy_username, proxy_host, proxy_rest)
if self.proxy_password is not None:
proxy_string = '%s://%s:%s@%s%s' % (proxy_proto,
self.proxy_username, self.proxy_password,
proxy_host, proxy_rest)
if proxy_string is not None:
self._proxy_dict['http'] = proxy_string
self._proxy_dict['https'] = proxy_string
self._proxy_dict['ftp'] = proxy_string
def __headersListFromDict(self):
"""Convert our dict of headers to a list of 2-tuples for urlgrabber."""
headers = []
keys = self.http_headers.keys()
for key in keys:
headers.append((key, self.http_headers[key]))
return headers
def setupGrab(self):
"""sets up the grabber functions with the already stocked in urls for
the mirror groups"""
if self.failovermethod == 'roundrobin':
mgclass = urlgrabber.mirror.MGRandomOrder
else:
mgclass = urlgrabber.mirror.MirrorGroup
headers = tuple(self.__headersListFromDict())
self.grabfunc = URLGrabber(keepalive=self.keepalive,
bandwidth=self.bandwidth,
retry=self.retries,
throttle=self.throttle,
progress_obj=self.callback,
proxies = self.proxy_dict,
failure_callback=self.failure_obj,
interrupt_callback=self.interrupt_callback,
timeout=self.timeout,
http_headers=headers,
reget='simple')
self.grab = mgclass(self.grabfunc, self.urls,
failure_callback=self.mirror_failure_obj)
def dirSetup(self):
"""make the necessary dirs, if possible, raise on failure"""
cachedir = os.path.join(self.parent.basecachedir, self.id)
deltasdir = os.path.join(cachedir, 'deltas')
self.parent.setAttribute('deltasdir', deltasdir)
self.setAttribute('cachedir', cachedir)
cookie = cachedir + '/' + self.metadata_cookie_fn
self.setAttribute('metadata_cookie', cookie)
for dir in [cachedir, self.parent.deltasdir]:
if self.cache == 0:
if os.path.exists(dir) and os.path.isdir(dir):
continue
else:
try:
os.makedirs(dir, mode=0755)
except OSError, e:
raise Errors.RepoError, \
"Error making cache directory: %s error was: %s" % (dir, e)
else:
if not os.path.exists(dir):
raise Errors.RepoError, \
"Cannot access repository dir %s" % dir
def baseurlSetup(self):
"""go through the baseurls and mirrorlists and populate self.urls
with valid ones, run self.check() at the end to make sure it worked"""
goodurls = []
if self.mirrorlist and not self.mirrorlistparsed:
mirrorurls = getMirrorList(self.mirrorlist, self.proxy_dict)
self.mirrorlistparsed = 1
for url in mirrorurls:
url = parser.varReplace(url, self.yumvar)
self.baseurl.append(url)
for url in self.baseurl:
url = parser.varReplace(url, self.yumvar)
(s,b,p,q,f,o) = urlparse.urlparse(url)
if s not in ['http', 'ftp', 'file', 'https']:
print 'not using ftp, http[s], or file for repos, skipping - %s' % (url)
continue
else:
goodurls.append(url)
self.setAttribute('urls', goodurls)
self.check()
self.setupGrab() # update the grabber for the urls
def __get(self, url=None, relative=None, local=None, start=None, end=None,
copy_local=0, checkfunc=None, text=None, reget='simple', cache=True):
"""retrieve file from the mirrorgroup for the repo
relative to local, optionally get range from
start to end, also optionally retrieve from a specific baseurl"""
# if local or relative is None: raise an exception b/c that shouldn't happen
# if url is not None - then do a grab from the complete url - not through
# the mirror, raise errors as need be
# if url is None do a grab via the mirror group/grab for the repo
# return the path to the local file
# Turn our dict into a list of 2-tuples
headers = self.__headersListFromDict()
# We will always prefer to send no-cache.
if not (cache or self.http_headers.has_key('Pragma')):
headers.append(('Pragma', 'no-cache'))
headers = tuple(headers)
if local is None or relative is None:
raise Errors.RepoError, \
"get request for Repo %s, gave no source or dest" % self.id
if self.cache == 1:
if os.path.exists(local): # FIXME - we should figure out a way
return local # to run the checkfunc from here
else: # ain't there - raise
raise Errors.RepoError, \
"Caching enabled but no local cache of %s from %s" % (local,
self)
if url is not None:
ug = URLGrabber(keepalive = self.keepalive,
bandwidth = self.bandwidth,
retry = self.retries,
throttle = self.throttle,
progress_obj = self.callback,
copy_local = copy_local,
reget = reget,
proxies = self.proxy_dict,
failure_callback = self.failure_obj,
interrupt_callback=self.interrupt_callback,
timeout=self.timeout,
checkfunc=checkfunc,
http_headers=headers,
)
remote = url + '/' + relative
try:
result = ug.urlgrab(remote, local,
text=text,
range=(start, end),
)
except URLGrabError, e:
raise Errors.RepoError, \
"failed to retrieve %s from %s\nerror was %s" % (relative, self.id, e)
else:
try:
result = self.grab.urlgrab(relative, local,
text = text,
range = (start, end),
copy_local=copy_local,
reget = reget,
checkfunc=checkfunc,
http_headers=headers,
)
except URLGrabError, e:
raise Errors.RepoError, "failure: %s from %s: %s" % (relative, self.id, e)
return result
def getPackage(self, package, checkfunc = None, text = None, cache = True):
remote = package.returnSimple('relativepath')
local = package.localPkg()
basepath = package.returnSimple('basepath')
return self.__get(url=basepath,
relative=remote,
local=local,
checkfunc=checkfunc,
text=text,
cache=cache
)
def metadataCurrent(self):
"""Check if there is a metadata_cookie and check its age. If the
age of the cookie is less than metadata_expire time then return true
else return False"""
val = False
if os.path.exists(self.metadata_cookie):
cookie_info = os.stat(self.metadata_cookie)
if cookie_info[8] + self.metadata_expire > time.time():
val = True
# WE ARE FROM THE FUTURE!!!!
elif cookie_info[8] > time.time():
val = False
return val
def setMetadataCookie(self):
"""if possible, set touch the metadata_cookie file"""
check = self.metadata_cookie
if not os.path.exists(self.metadata_cookie):
check = self.cachedir
if os.access(check, os.W_OK):
fo = open(self.metadata_cookie, 'w+')
fo.close()
del fo
def setup(self, cache):
try:
self.cache = cache
self.baseurlSetup()
self.dirSetup()
except Errors.RepoError, e:
raise
try:
self._loadRepoXML(text=self)
except Errors.RepoError, e:
raise Errors.RepoError, ('Cannot open/read %s file for repository: %s' % (self.repoMDFile, self))
def _loadRepoXML(self, text=None):
"""retrieve/check/read in repomd.xml from the repository"""
remote = self.repoMDFile
if self.is_different:
local = self.cachedir + '/prestomd.xml'
else:
local = self.cachedir + '/repomd.xml'
if self.repoXML is not None:
return
if self.cache or self.metadataCurrent():
if not os.path.exists(local):
raise Errors.RepoError, 'Cannot find %s file for %s' % (self.repoMDFile, self)
else:
result = local
else:
checkfunc = (self._checkRepoXML, (), {})
try:
result = self.__get(relative=remote,
local=local,
copy_local=1,
text=text,
reget=None,
checkfunc=checkfunc,
cache=self.http_caching == 'all')
except URLGrabError, e:
raise Errors.RepoError, 'Error downloading file %s: %s' % (local, e)
# if we have a 'fresh' repomd.xml then update the cookie
self.setMetadataCookie()
try:
self.repoXML = repoMDObject.RepoMD(self.id, result)
except Errors.RepoMDError, e:
raise Errors.RepoError, 'Error importing %s from %s: %s' % (self.repoMDFile, self, e)
def _checkRepoXML(self, fo):
if type(fo) is types.InstanceType:
filepath = fo.filename
else:
filepath = fo
try:
repoMDObject.RepoMD(self.id, filepath)
except Errors.RepoMDError, e:
raise URLGrabError(-1, 'Error importing %s for %s: %s' % (self.repoMDFile, self, e))
def checkMD(self, fn, mdtype):
"""check the metadata type against its checksum"""
thisdata = self.repoXML.getData(mdtype)
(r_ctype, r_csum) = thisdata.checksum # get the remote checksum
if type(fn) == types.InstanceType: # this is an urlgrabber check
file = fn.filename
else:
file = fn
try:
l_csum = self._checksum(r_ctype, file) # get the local checksum
except Errors.RepoError, e:
raise URLGrabError(-3, 'Error performing checksum')
if l_csum == r_csum:
return 1
else:
raise URLGrabError(-1, 'Metadata file does not match checksum')
def retrieveMD(self, mdtype):
"""base function to retrieve metadata files from the remote url
returns the path to the local metadata file of a 'mdtype'
mdtype must be 'deltas'."""
try:
thisdata = self.repoXML.getData(mdtype)
except Errors.RepoMDError:
self.enabled = False
self.conduit.info(5, "No drpms available for %s" % self.id)
return
(r_base, remote) = thisdata.location
fname = os.path.basename(remote)
local = self.cachedir + '/' + fname
if self.retrieved.has_key(mdtype):
if self.retrieved[mdtype]: # got it, move along
return local
if self.cache == 1:
if os.path.exists(local):
try:
self.checkMD(local, mdtype)
except URLGrabError, e:
raise Errors.RepoError, \
"Caching enabled and local cache: %s does not match checksum" % local
else:
return local
else: # ain't there - raise
raise Errors.RepoError, \
"Caching enabled but no local cache of %s from %s" % (local,
self)
if os.path.exists(local):
try:
self.checkMD(local, mdtype)
except URLGrabError, e:
pass
else:
self.retrieved[mdtype] = 1
return local # it's the same return the local one
try:
checkfunc = (self.checkMD, (mdtype,), {})
local = self.__get(relative=remote, local=local, copy_local=1,
checkfunc=checkfunc, reget=None,
cache=self.http_caching == 'all')
except URLGrabError, e:
raise Errors.RepoError, \
"Could not retrieve %s matching remote checksum from %s" % (local, self)
else:
self.retrieved[mdtype] = 1
return local
def getPrestoXML(self):
"""this gets you the path to the primary.xml file, retrieving it if we
need a new one"""
return self.retrieveMD('deltas')
def setCallback(self, callback):
self.callback = callback
self.setupGrab()
def setFailureObj(self, failure_obj):
self.failure_obj = failure_obj
self.setupGrab()
def setMirrorFailureObj(self, failure_obj):
self.mirror_failure_obj = failure_obj
self.setupGrab()
def setInterruptCallback(self, callback):
self.interrupt_callback = callback
self.setupGrab()
def getMirrorList(mirrorlist, pdict = None):
"""retrieve an up2date-style mirrorlist file from a url,
we also s/$ARCH/$BASEARCH/ and move along
returns a list of the urls from that file"""
returnlist = []
if hasattr(urlgrabber.grabber, 'urlopen'):
urlresolver = urlgrabber.grabber
else:
import urllib
urlresolver = urllib
scheme = urlparse.urlparse(mirrorlist)[0]
if scheme == '':
url = 'file://' + mirrorlist
else:
url = mirrorlist
try:
fo = urlresolver.urlopen(url, proxies=pdict)
except urlgrabber.grabber.URLGrabError, e:
print "Could not retrieve mirrorlist %s error was\n%s" % (url, e)
fo = None
if fo is not None:
content = fo.readlines()
for line in content:
if re.match('^\s*\#.*', line) or re.match('^\s*$', line):
continue
mirror = re.sub('\n$', '', line) # no more trailing \n's
(mirror, count) = re.subn('\$ARCH', '$BASEARCH', mirror)
returnlist.append(mirror)
return returnlist
|