fix: make sure that callbacks are called only once

multiformats · Jan 10, 2017 · 12a43d3 · 12a43d3
1 parent 8032ab8
commit 12a43d3
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diff --git a/package.json b/package.json
@@ -46,6 +46,7 @@
     "interface-connection": "^0.3.0",
     "lodash.isfunction": "^3.0.8",
     "lodash.range": "^3.2.0",
+    "once": "^1.4.0",
     "pull-handshake": "^1.1.4",
     "pull-length-prefixed": "^1.2.0",
     "pull-stream": "^3.5.0",

diff --git a/src/dialer/index.js b/src/dialer/index.js
@@ -6,6 +6,7 @@ const pullLP = require('pull-length-prefixed')
 const Connection = require('interface-connection').Connection
 const util = require('../util')
 const select = require('../select')
+const once = require('once')
 
 const PROTOCOL_ID = require('./../constants').PROTOCOL_ID
 
@@ -31,6 +32,7 @@ class Dialer {
    */
   handle (rawConn, callback) {
     this.log('dialer handle conn')
+    callback = once(callback)
     const s = select(PROTOCOL_ID, (err, conn) => {
       if (err) {
         return callback(err)