Web (HTTP) Seeding

lib/torrent.js

@@ -256,6 +256,10 @@ Torrent.prototype._onSwarmListening = function () {
   // if full metadata was included in initial torrent id, use it
   if (self.parsedTorrent.info) self._onMetadata(self.parsedTorrent)
 
+  if (self.parsedTorrent.urlList) {
+    self.parsedTorrent.urlList.forEach(self.addWebPeer.bind(self))
+  }
+
   self.emit('listening', self.client.torrentPort)
 }
 
@@ -402,6 +406,16 @@ Torrent.prototype.addPeer = function (peer) {
   }
 }
 
+/**
+ * Add a web peer to the swarm
+ * @param {string} web peer url
+ */
+Torrent.prototype.addWebPeer = function (webPeer) {
+  var self = this
+  self.emit('webPeer', webPeer)
+  self.swarm.addWebPeer(webPeer, self.parsedTorrent)
+}
+
 /**
  * Select a range of pieces to prioritize.
  *

package.json

@@ -67,7 +67,9 @@
     "bittorrent-tracker": "^4.0.0",
     "brfs": "^1.2.0",
     "browserify": "^10.0.0",
+    "finalhandler": "^0.3.6",
     "run-auto": "^1.0.0",
+    "serve-static": "^1.9.3",
     "standard": "^3.1.1",
     "tape": "^4.0.0",
     "uglify-js": "^2.4.15",

test/download-webseed-torrent.js

@@ -0,0 +1,78 @@
+var auto = require('run-auto')
+var fs = require('fs')
+var parseTorrent = require('parse-torrent')
+var test = require('tape')
+var WebTorrent = require('../')
+
+var http = require('http')
+var serveStatic = require('serve-static')
+var finalhandler = require('finalhandler')
+var path = require('path')
+
+var leavesPath = __dirname + '/content/Leaves of Grass by Walt Whitman.epub'
+var leavesFilename = 'Leaves of Grass by Walt Whitman.epub'
+var leavesFile = fs.readFileSync(leavesPath)
+var leavesTorrent = fs.readFileSync(__dirname + '/torrents/leaves.torrent')
+var leavesParsed = parseTorrent(leavesTorrent)
+
+// remove trackers from .torrent file
+leavesParsed.announce = []
+
+test('Download using webseed (via .torrent file)', function (t) {
+  t.plan(5)
+
+  var serve = serveStatic(path.join(__dirname, './content'))
+  var httpServer = http.createServer(function (req, res) {
+    var done = finalhandler(req, res)
+    serve(req, res, done)
+  })
+
+  httpServer.on('error', function (err) {
+    t.fail(err)
+  })
+
+  auto({
+    httpPort: function (cb) {
+      httpServer.listen(function () {
+        var port = httpServer.address().port
+        cb(null, port)
+      })
+    },
+    client1: ['httpPort', function (cb, r) {
+
+      leavesParsed.urlList.push('http://localhost:' + r.httpPort + '/' + leavesFilename)
+
+      var client1 = new WebTorrent({
+        tracker: false,
+        dht: { bootstrap: false }
+      })
+
+      client1.on('error', function (err) { t.fail(err) })
+
+      client1.on('torrent', function (torrent) {
+        torrent.files.forEach(function (file) {
+          file.getBuffer(function (err, buf) {
+            if (err) throw err
+            t.deepEqual(buf, leavesFile, 'downloaded correct content')
+          })
+        })
+
+        torrent.once('done', function () {
+          t.pass('client1 downloaded torrent from webseed')
+          cb(null, client1)
+        })
+      })
+
+      client1.add(leavesParsed)
+
+    }]
+  }, function (err, r) {
+    t.error(err)
+    r.client1.destroy(function () {
+      t.pass('client1 destroyed')
+    })
+    httpServer.close(function () {
+      t.pass('http server closed')
+    })
+  })
+})