--- /dev/null
+
+"""Manage the multiple mirrors that may be requested.
+
+@var aptpkg_dir: the name of the directory to use for mirror files
+"""
+
+from urlparse import urlparse
+import os
+
+from twisted.python import log
+from twisted.python.filepath import FilePath
+from twisted.internet import defer
+from twisted.trial import unittest
+from twisted.web2.http import splitHostPort
+
+from AptPackages import AptPackages
+
+aptpkg_dir='apt-packages'
+
+class MirrorError(Exception):
+ """Exception raised when there's a problem with the mirror."""
+
+class MirrorManager:
+ """Manages all requests for mirror information.
+
+ @type cache_dir: L{twisted.python.filepath.FilePath}
+ @ivar cache_dir: the directory to use for storing all files
+ @type unload_delay: C{int}
+ @ivar unload_delay: the time to wait before unloading the apt cache
+ @type apt_caches: C{dictionary}
+ @ivar apt_caches: the avaliable mirrors
+ """
+
+ def __init__(self, cache_dir, unload_delay):
+ self.cache_dir = cache_dir
+ self.unload_delay = unload_delay
+ self.apt_caches = {}
+
+ def extractPath(self, url):
+ """Break the full URI down into the site, base directory and path.
+
+ Site is the host and port of the mirror. Base directory is the
+ directory to the mirror location (usually just '/debian'). Path is
+ the remaining path to get to the file.
+
+ E.g. http://ftp.debian.org/debian/dists/sid/binary-i386/Packages.bz2
+ would return ('ftp.debian.org:80', '/debian',
+ '/dists/sid/binary-i386/Packages.bz2').
+
+ @param url: the URI of the file's location on the mirror
+ @rtype: (C{string}, C{string}, C{string})
+ @return: the site, base directory and path to the file
+ """
+ # Extract the host and port
+ parsed = urlparse(url)
+ host, port = splitHostPort(parsed[0], parsed[1])
+ site = host + ":" + str(port)
+ path = parsed[2]
+
+ # Try to find the base directory (most can be found this way)
+ i = max(path.rfind('/dists/'), path.rfind('/pool/'))
+ if i >= 0:
+ baseDir = path[:i]
+ path = path[i:]
+ else:
+ # Uh oh, this is not good
+ log.msg("Couldn't find a good base directory for path: %s" % (site + path))
+
+ # Try to find an existing cache that starts with this one
+ # (fallback to using an empty base directory)
+ baseDir = ''
+ if site in self.apt_caches:
+ longest_match = 0
+ for base in self.apt_caches[site]:
+ base_match = ''
+ for dirs in path.split('/'):
+ if base.startswith(base_match + '/' + dirs):
+ base_match += '/' + dirs
+ else:
+ break
+ if len(base_match) > longest_match:
+ longest_match = len(base_match)
+ baseDir = base_match
+ log.msg("Settled on baseDir: %s" % baseDir)
+
+ return site, baseDir, path
+
+ def init(self, site, baseDir):
+ """Make sure an L{AptPackages} exists for this mirror."""
+ if site not in self.apt_caches:
+ self.apt_caches[site] = {}
+
+ if baseDir not in self.apt_caches[site]:
+ site_cache = self.cache_dir.child(aptpkg_dir).child('mirrors').child(site + baseDir.replace('/', '_'))
+ site_cache.makedirs
+ self.apt_caches[site][baseDir] = AptPackages(site_cache, self.unload_delay)
+
+ def updatedFile(self, url, file_path):
+ """A file in the mirror has changed or been added.
+
+ @see: L{AptPackages.PackageFileList.update_file}
+ """
+ site, baseDir, path = self.extractPath(url)
+ self.init(site, baseDir)
+ self.apt_caches[site][baseDir].file_updated(path, file_path)
+
+ def findHash(self, url):
+ """Find the hash for a given url.
+
+ @param url: the URI of the file's location on the mirror
+ @rtype: L{twisted.internet.defer.Deferred}
+ @return: a deferred that will fire with the returned L{Hash.HashObject}
+ """
+ site, baseDir, path = self.extractPath(url)
+ if site in self.apt_caches and baseDir in self.apt_caches[site]:
+ return self.apt_caches[site][baseDir].findHash(path)
+ d = defer.Deferred()
+ d.errback(MirrorError("Site Not Found"))
+ return d
+
+ def cleanup(self):
+ for site in self.apt_caches.keys():
+ for baseDir in self.apt_caches[site].keys():
+ self.apt_caches[site][baseDir].cleanup()
+ del self.apt_caches[site][baseDir]
+ del self.apt_caches[site]
+
+class TestMirrorManager(unittest.TestCase):
+ """Unit tests for the mirror manager."""
+
+ timeout = 20
+ pending_calls = []
+ client = None
+
+ def setUp(self):
+ self.client = MirrorManager(FilePath('/tmp/.apt-p2p'), 300)
+
+ def test_extractPath(self):
+ """Test extracting the site and base directory from various mirrors."""
+ site, baseDir, path = self.client.extractPath('http://ftp.us.debian.org/debian/dists/unstable/Release')
+ self.failUnless(site == "ftp.us.debian.org:80", "no match: %s" % site)
+ self.failUnless(baseDir == "/debian", "no match: %s" % baseDir)
+ self.failUnless(path == "/dists/unstable/Release", "no match: %s" % path)
+
+ site, baseDir, path = self.client.extractPath('http://ftp.us.debian.org:16999/debian/pool/d/dpkg/dpkg_1.2.1-1.tar.gz')
+ self.failUnless(site == "ftp.us.debian.org:16999", "no match: %s" % site)
+ self.failUnless(baseDir == "/debian", "no match: %s" % baseDir)
+ self.failUnless(path == "/pool/d/dpkg/dpkg_1.2.1-1.tar.gz", "no match: %s" % path)
+
+ site, baseDir, path = self.client.extractPath('http://debian.camrdale.org/dists/unstable/Release')
+ self.failUnless(site == "debian.camrdale.org:80", "no match: %s" % site)
+ self.failUnless(baseDir == "", "no match: %s" % baseDir)
+ self.failUnless(path == "/dists/unstable/Release", "no match: %s" % path)
+
+ def verifyHash(self, found_hash, path, true_hash):
+ self.failUnless(found_hash.hexexpected() == true_hash,
+ "%s hashes don't match: %s != %s" % (path, found_hash.hexexpected(), true_hash))
+
+ def test_findHash(self):
+ """Tests finding the hash of an index file, binary package, source package, and another index file."""
+ # Find the largest index files that are for 'main'
+ self.packagesFile = os.popen('ls -Sr /var/lib/apt/lists/ | grep -E "_main_.*Packages$" | tail -n 1').read().rstrip('\n')
+ self.sourcesFile = os.popen('ls -Sr /var/lib/apt/lists/ | grep -E "_main_.*Sources$" | tail -n 1').read().rstrip('\n')
+
+ # Find the Release file corresponding to the found Packages file
+ for f in os.walk('/var/lib/apt/lists').next()[2]:
+ if f[-7:] == "Release" and self.packagesFile.startswith(f[:-7]):
+ self.releaseFile = f
+ break
+
+ # Add all the found files to the mirror
+ self.client.updatedFile('http://' + self.releaseFile.replace('_','/'),
+ FilePath('/var/lib/apt/lists/' + self.releaseFile))
+ self.client.updatedFile('http://' + self.releaseFile[:self.releaseFile.find('_dists_')+1].replace('_','/') +
+ self.packagesFile[self.packagesFile.find('_dists_')+1:].replace('_','/'),
+ FilePath('/var/lib/apt/lists/' + self.packagesFile))
+ self.client.updatedFile('http://' + self.releaseFile[:self.releaseFile.find('_dists_')+1].replace('_','/') +
+ self.sourcesFile[self.sourcesFile.find('_dists_')+1:].replace('_','/'),
+ FilePath('/var/lib/apt/lists/' + self.sourcesFile))
+
+ lastDefer = defer.Deferred()
+
+ # Lookup a Packages.bz2 file
+ idx_hash = os.popen('grep -A 3000 -E "^SHA1:" ' +
+ '/var/lib/apt/lists/' + self.releaseFile +
+ ' | grep -E " main/binary-i386/Packages.bz2$"'
+ ' | head -n 1 | cut -d\ -f 2').read().rstrip('\n')
+ idx_path = 'http://' + self.releaseFile.replace('_','/')[:-7] + 'main/binary-i386/Packages.bz2'
+
+ d = self.client.findHash(idx_path)
+ d.addCallback(self.verifyHash, idx_path, idx_hash)
+
+ # Lookup the binary 'dpkg' package
+ pkg_hash = os.popen('grep -A 30 -E "^Package: dpkg$" ' +
+ '/var/lib/apt/lists/' + self.packagesFile +
+ ' | grep -E "^SHA1:" | head -n 1' +
+ ' | cut -d\ -f 2').read().rstrip('\n')
+ pkg_path = 'http://' + self.releaseFile[:self.releaseFile.find('_dists_')+1].replace('_','/') + \
+ os.popen('grep -A 30 -E "^Package: dpkg$" ' +
+ '/var/lib/apt/lists/' + self.packagesFile +
+ ' | grep -E "^Filename:" | head -n 1' +
+ ' | cut -d\ -f 2').read().rstrip('\n')
+
+ d = self.client.findHash(pkg_path)
+ d.addCallback(self.verifyHash, pkg_path, pkg_hash)
+
+ # Lookup the source 'dpkg' package
+ src_dir = os.popen('grep -A 30 -E "^Package: dpkg$" ' +
+ '/var/lib/apt/lists/' + self.sourcesFile +
+ ' | grep -E "^Directory:" | head -n 1' +
+ ' | cut -d\ -f 2').read().rstrip('\n')
+ src_hashes = os.popen('grep -A 20 -E "^Package: dpkg$" ' +
+ '/var/lib/apt/lists/' + self.sourcesFile +
+ ' | grep -A 4 -E "^Files:" | grep -E "^ " ' +
+ ' | cut -d\ -f 2').read().split('\n')[:-1]
+ src_paths = os.popen('grep -A 20 -E "^Package: dpkg$" ' +
+ '/var/lib/apt/lists/' + self.sourcesFile +
+ ' | grep -A 4 -E "^Files:" | grep -E "^ " ' +
+ ' | cut -d\ -f 4').read().split('\n')[:-1]
+
+ for i in range(len(src_hashes)):
+ src_path = 'http://' + self.releaseFile[:self.releaseFile.find('_dists_')+1].replace('_','/') + src_dir + '/' + src_paths[i]
+ d = self.client.findHash(src_path)
+ d.addCallback(self.verifyHash, src_path, src_hashes[i])
+
+ # Lookup a Sources.bz2 file
+ idx_hash = os.popen('grep -A 3000 -E "^SHA1:" ' +
+ '/var/lib/apt/lists/' + self.releaseFile +
+ ' | grep -E " main/source/Sources.bz2$"'
+ ' | head -n 1 | cut -d\ -f 2').read().rstrip('\n')
+ idx_path = 'http://' + self.releaseFile.replace('_','/')[:-7] + 'main/source/Sources.bz2'
+
+ d = self.client.findHash(idx_path)
+ d.addCallback(self.verifyHash, idx_path, idx_hash)
+
+ d.addBoth(lastDefer.callback)
+ return lastDefer
+
+ def tearDown(self):
+ for p in self.pending_calls:
+ if p.active():
+ p.cancel()
+ self.client.cleanup()
+ self.client = None
+
\ No newline at end of file
projects / quix0rs-apt-p2p.git / blobdiff