buffer: add .from(), .alloc() and .allocUnsafe()

Several changes:

* Soft-Deprecate Buffer() constructors
* Add `Buffer.from()`, `Buffer.alloc()`, and `Buffer.allocUnsafe()`
* Add `--zero-fill-buffers` command line option
* Add byteOffset and length to `new Buffer(arrayBuffer)` constructor
* buffer.fill('') previously had no effect, now zero-fills
* Update the docs

PR-URL: https://github.com/nodejs/node/pull/4682
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>

1 files changed, 3 insertions, 6 deletions

diff --git a/test/parallel/test-https-resume-after-renew.js b/test/parallel/test-https-resume-after-renew.js
index 23626ccb40..6a1238f6e8 100644
--- a/test/parallel/test-https-resume-after-renew.js
+++ b/test/parallel/test-https-resume-after-renew.js
@@ -14,17 +14,14 @@ var server = https.createServer(options, function(req, res) {
   res.end('hello');
 });
 
-var aes = new Buffer(16);
-aes.fill('S');
-var hmac = new Buffer(16);
-hmac.fill('H');
+var aes = Buffer.alloc(16, 'S');
+var hmac = Buffer.alloc(16, 'H');
 
 server._sharedCreds.context.enableTicketKeyCallback();
 server._sharedCreds.context.onticketkeycallback = function(name, iv, enc) {
   if (enc) {
-    var newName = new Buffer(16);
+    var newName = Buffer.alloc(16, 'A');
     var newIV = crypto.randomBytes(16);
-    newName.fill('A');
   } else {
     // Renew
     return [ 2, hmac, aes ];