preserve backwards compatibility

Author: feross

README.md

@@ -111,13 +111,14 @@ var Server = require('bittorrent-tracker').Server
 var server = new Server({
   udp: true, // enable udp server? [default=true]
   http: true, // enable http server? [default=true]
-  filter: function (params) {
+  filter: function (infoHash, params) {
     // black/whitelist for disallowing/allowing torrents [default=allow all]
     // this example only allows this one torrent
-    return params.info_hash === 'aaa67059ed6bd08362da625b3ae77f6f4a075aaa'
-    
+    return infoHash === 'aaa67059ed6bd08362da625b3ae77f6f4a075aaa'
+
     // you can also block by peer id (whitelisting torrent clients) or by
-    // secret key, as you get full access to the original http request
+    // secret key, as you get full access to the original http GET
+    // request parameters in `params`
   })
 })
 

server.js

@@ -111,8 +111,9 @@ Server.prototype.close = function (cb) {
 
 Server.prototype.getSwarm = function (infoHash, params) {
   var self = this
-  if (Buffer.isBuffer(infoHash)) infoHash = params.info_hash = infoHash.toString('hex')
-  if (self._filter && !self._filter(params)) return null
+  if (!params) params = {}
+  if (Buffer.isBuffer(infoHash)) infoHash = infoHash.toString('hex')
+  if (self._filter && !self._filter(infoHash, params)) return null
   var swarm = self.torrents[infoHash]
   if (!swarm) swarm = self.torrents[infoHash] = new Swarm(infoHash, this)
   return swarm