X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=apt_dht%2Fapt_dht.py;h=9fc72ffedafe871cef7faed2967395adb2ce6de2;hb=842adfabdd1ea04a07998c0bfbbb21ffa6ecbfad;hp=d30f0b86e1d186634a4b35da6d02dfabc6dbf481;hpb=dd75e47b4d4ee40dae492753a226d5a42ac73c1c;p=quix0rs-apt-p2p.git

diff --git a/apt_dht/apt_dht.py b/apt_dht/apt_dht.py
index d30f0b8..9fc72ff 100644
--- a/apt_dht/apt_dht.py
+++ b/apt_dht/apt_dht.py
@@ -1,24 +1,193 @@
 
+from binascii import b2a_hex
+import os, re
+
+from twisted.internet import defer
 from twisted.web2 import server, http, http_headers
+from twisted.python import log
 
 from apt_dht_conf import config
+from PeerManager import PeerManager
 from HTTPServer import TopLevel
+from MirrorManager import MirrorManager
+from Hash import HashObject
 
 class AptDHT:
-    def __init__(self):
-        self.http_server = TopLevel(config.defaults()['cache_dir'], self)
+    def __init__(self, dht):
+        log.msg('Initializing the main apt_dht application')
+        self.dht = dht
+        self.dht.loadConfig(config, config.get('DEFAULT', 'DHT'))
+        self.dht.join().addCallbacks(self.joinComplete, self.joinError)
+        self.http_server = TopLevel(config.get('DEFAULT', 'cache_dir'), self)
         self.http_site = server.Site(self.http_server)
+        self.peers = PeerManager()
+        self.mirrors = MirrorManager(config.get('DEFAULT', 'cache_dir'), self)
+        self.my_addr = None
+        self.isLocal = re.compile('^(192\.168\.[0-9]{1,3}\.[0-9]{1,3})|'+
+                                  '(10\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})|'+
+                                  '(172\.0?([1][6-9])|([2][0-9])|([3][0-1])\.[0-9]{1,3}\.[0-9]{1,3})|'+
+                                  '(127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})$')
     
     def getSite(self):
         return self.http_site
+
+    def joinComplete(self, addrs):
+        log.msg("got addrs: %r" % (addrs,))
+        
+        try:
+            ifconfig = os.popen("/sbin/ifconfig |/bin/grep inet|"+
+                                "/usr/bin/awk '{print $2}' | "+
+                                "sed -e s/.*://", "r").read().strip().split('\n')
+        except:
+            ifconfig = []
+
+        # Get counts for all the non-local addresses returned
+        addr_count = {}
+        for addr in ifconfig:
+            if not self.isLocal.match(addr):
+                addr_count.setdefault(addr, 0)
+                addr_count[addr] += 1
+        
+        local_addrs = addr_count.keys()    
+        if len(local_addrs) == 1:
+            self.my_addr = local_addrs[0]
+            log.msg('Found remote address from ifconfig: %r' % (self.my_addr,))
+        
+        # Get counts for all the non-local addresses returned
+        addr_count = {}
+        port_count = {}
+        for addr in addrs:
+            if not self.isLocal.match(addr[0]):
+                addr_count.setdefault(addr[0], 0)
+                addr_count[addr[0]] += 1
+                port_count.setdefault(addr[1], 0)
+                port_count[addr[1]] += 1
+        
+        # Find the most popular address
+        popular_addr = []
+        popular_count = 0
+        for addr in addr_count:
+            if addr_count[addr] > popular_count:
+                popular_addr = [addr]
+                popular_count = addr_count[addr]
+            elif addr_count[addr] == popular_count:
+                popular_addr.append(addr)
+        
+        # Find the most popular port
+        popular_port = []
+        popular_count = 0
+        for port in port_count:
+            if port_count[port] > popular_count:
+                popular_port = [port]
+                popular_count = port_count[port]
+            elif port_count[port] == popular_count:
+                popular_port.append(port)
+                
+        port = config.getint(config.get('DEFAULT', 'DHT'), 'PORT')
+        if len(port_count.keys()) > 1:
+            log.msg('Problem, multiple ports have been found: %r' % (port_count,))
+            if port not in port_count.keys():
+                log.msg('And none of the ports found match the intended one')
+        elif len(port_count.keys()) == 1:
+            port = port_count.keys()[0]
+        else:
+            log.msg('Port was not found')
+
+        if len(popular_addr) == 1:
+            log.msg('Found popular address: %r' % (popular_addr[0],))
+            if self.my_addr and self.my_addr != popular_addr[0]:
+                log.msg('But the popular address does not match: %s != %s' % (popular_addr[0], self.my_addr))
+            self.my_addr = popular_addr[0]
+        elif len(popular_addr) > 1:
+            log.msg('Found multiple popular addresses: %r' % (popular_addr,))
+            if self.my_addr and self.my_addr not in popular_addr:
+                log.msg('And none of the addresses found match the ifconfig one')
+        else:
+            log.msg('No non-local addresses found: %r' % (popular_addr,))
+            
+        if not self.my_addr:
+            log.err(RuntimeError("Remote IP Address could not be found for this machine"))
+
+    def ipAddrFromChicken(self):
+        import urllib
+        ip_search = re.compile('\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}')
+        try:
+             f = urllib.urlopen("http://www.ipchicken.com")
+             data = f.read()
+             f.close()
+             current_ip = ip_search.findall(data)
+             return current_ip
+        except Exception:
+             return []
+
+    def joinError(self, failure):
+        log.msg("joining DHT failed miserably")
+        log.err(failure)
     
     def check_freshness(self, path, modtime, resp):
-        return resp
+        log.msg('Checking if %s is still fresh' % path)
+        d = self.peers.get([path], "HEAD", modtime)
+        d.addCallback(self.check_freshness_done, path, resp)
+        return d
+    
+    def check_freshness_done(self, resp, path, orig_resp):
+        if resp.code == 304:
+            log.msg('Still fresh, returning: %s' % path)
+            return orig_resp
+        else:
+            log.msg('Stale, need to redownload: %s' % path)
+            return self.get_resp(path)
     
     def get_resp(self, path):
-        return http.Response(
-            200,
-            {'content-type': http_headers.MimeType('text', 'html')},
-            """<html><body>
-            <h2>Statistics</h2>
-            <p>TODO: eventually this will cause a P2P lookup.</body></html>""")
+        d = defer.Deferred()
+        
+        log.msg('Trying to find hash for %s' % path)
+        findDefer = self.mirrors.findHash(path)
+        
+        findDefer.addCallbacks(self.findHash_done, self.findHash_error, 
+                               callbackArgs=(path, d), errbackArgs=(path, d))
+        findDefer.addErrback(log.err)
+        return d
+    
+    def findHash_error(self, failure, path, d):
+        log.err(failure)
+        self.findHash_done(HashObject(), path, d)
+        
+    def findHash_done(self, hash, path, d):
+        if hash.expected() is None:
+            log.msg('Hash for %s was not found' % path)
+            self.download_file([path], hash, path, d)
+        else:
+            log.msg('Found hash %s for %s' % (hash.hexexpected(), path))
+            # Lookup hash from DHT
+            key = hash.normexpected(bits = config.getint(config.get('DEFAULT', 'DHT'), 'HASH_LENGTH'))
+            lookupDefer = self.dht.getValue(key)
+            lookupDefer.addCallback(self.lookupHash_done, hash, path, d)
+            
+    def lookupHash_done(self, locations, hash, path, d):
+        if not locations:
+            log.msg('Peers for %s were not found' % path)
+            self.download_file([path], hash, path, d)
+        else:
+            log.msg('Found peers for %s: %r' % (path, locations))
+            # Download from the found peers
+            self.download_file(locations, hash, path, d)
+            
+    def download_file(self, locations, hash, path, d):
+        getDefer = self.peers.get(locations)
+        getDefer.addCallback(self.mirrors.save_file, hash, path)
+        getDefer.addErrback(self.mirrors.save_error, path)
+        getDefer.addCallbacks(d.callback, d.errback)
+        
+    def download_complete(self, hash, url, file_path):
+        assert file_path.startswith(config.get('DEFAULT', 'cache_dir'))
+        directory = file_path[:len(config.get('DEFAULT', 'cache_dir'))]
+        url_path = file_path[len(config.get('DEFAULT', 'cache_dir')):]
+        if url_path[0] == '/':
+            url_path = url_path[1:]
+        top_directory = url_path.split('/',1)[0]
+        url_path = url_path[len(top_directory):]
+        http_dir = os.path.join(directory, top_directory)
+        new_top = self.http_server.addDirectory(http_dir)
+        url_path = '/' + new_top + url_path
+        log.msg('now avaliable at %s: %s' % (url_path, url))