string.length !== Buffer.byteLength(string)

lib/buffer.js

@@ -111,6 +111,9 @@ function Buffer (subject, encoding, legacy, slice_legacy) {
         break;
 
       case 'string':
+        length = Buffer.byteLength(subject);
+        break;
+
       case 'object': // Assume object is an array
         length = subject.length;
         break;
@@ -186,7 +189,7 @@ Buffer.prototype.set = function set (i, v) {
 };
 
 
-// write(string, offset = 0, encoding = 'uft8')
+// write(string, offset = 0, encoding = 'utf8')
 Buffer.prototype.write = function write (string, offset, encoding) {
   if (!isFinite(offset)) {
     var swap = encoding;
@@ -195,11 +198,12 @@ Buffer.prototype.write = function write (string, offset, encoding) {
   }
 
   offset   || (offset   = 0);
-  encoding || (encoding = 'uft8');
+  encoding || (encoding = 'utf8');
 
   // Make sure we are not going to overflow
   var max_length = this.length - offset;
-  if (string.length > max_length) {
+  if (Buffer.byteLength(string) > max_length) {
+    // FIXME: Char length !== byte length
     string = string.slice(0, max_length);
   }