From 52ceb99661b363262b2261b2c2e1e5a90b0a6608 Mon Sep 17 00:00:00 2001
From: Cameron Dale <camrdale@gmail.com>
Date: Wed, 27 Feb 2008 12:05:30 -0800
Subject: [PATCH] Add appropriate piece strings to the DHT.

---
 apt_dht/apt_dht.py | 31 +++++++++++++++++++++++++++++--
 1 file changed, 29 insertions(+), 2 deletions(-)

diff --git a/apt_dht/apt_dht.py b/apt_dht/apt_dht.py
index 1896494..151e3db 100644
--- a/apt_dht/apt_dht.py
+++ b/apt_dht/apt_dht.py
@@ -1,7 +1,7 @@
 
 from binascii import b2a_hex
 from urlparse import urlunparse
-import os, re
+import os, re, sha
 
 from twisted.internet import defer, reactor
 from twisted.web2 import server, http, http_headers, static
@@ -17,6 +17,9 @@ from Hash import HashObject
 from db import DB
 from util import findMyIPAddr, compact
 
+DHT_PIECES = 4
+TORRENT_PIECES = 70
+
 download_dir = 'cache'
 
 class AptDHT:
@@ -182,6 +185,17 @@ class AptDHT:
         if self.my_contact and hash and new_hash and (hash.expected() is not None or forceDHT):
             key = hash.norm(bits = config.getint(config.get('DEFAULT', 'DHT'), 'HASH_LENGTH'))
             value = {'c': self.my_contact}
+            pieces = hash.pieceDigests()
+            if len(pieces) <= 1:
+                pass
+            elif len(pieces) <= DHT_PIECES:
+                value['t'] = {'t': ''.join(pieces)}
+            elif len(pieces) <= TORRENT_PIECES:
+                s = sha.new().update(''.join(pieces))
+                value['h'] = s.digest()
+            else:
+                s = sha.new().update(''.join(pieces))
+                value['l'] = s.digest()
             storeDefer = self.dht.storeValue(key, value)
             storeDefer.addCallback(self.store_done, hash)
             return storeDefer
@@ -189,4 +203,17 @@ class AptDHT:
 
     def store_done(self, result, hash):
         log.msg('Added %s to the DHT: %r' % (hash.hexdigest(), result))
-        
\ No newline at end of file
+        pieces = hash.pieceDigests()
+        if len(pieces) > DHT_PIECES and len(pieces) <= TORRENT_PIECES:
+            s = sha.new().update(''.join(pieces))
+            key = s.digest()
+            value = {'t': ''.join(pieces)}
+            storeDefer = self.dht.storeValue(key, value)
+            storeDefer.addCallback(self.store_torrent_done, key)
+            return storeDefer
+        return result
+
+    def store_torrent_done(self, result, key):
+        log.msg('Added torrent string %s to the DHT: %r' % (b2ahex(key), result))
+        return result
+    
\ No newline at end of file
-- 
2.39.5