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buffer: implement Buffer.prototype.toJSON()

Returns an Array-representation of the Buffer.
Closes #3905.
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TooTallNate committed Sep 8, 2012
1 parent 8e0c830 commit a4ef01df07ce1d1365eec057911131c6212444f4
Showing with 28 additions and 0 deletions.
  1. +19 −0 doc/api/buffer.markdown
  2. +5 −0 lib/buffer.js
  3. +4 −0 test/simple/test-buffer.js
@@ -108,6 +108,25 @@ Decodes and returns a string from buffer data encoded with `encoding`
See `buffer.write()` example, above.


### buf.toJSON()

Returns a JSON-representation of the Buffer instance, which is identical to the
output for JSON Arrays. `JSON.stringify` implictly calls this function when
stringifying a Buffer instance.

Example:

var buf = new Buffer('test');
var json = JSON.stringify(buf);

console.log(json);
// '[116,101,115,116]'

var copy = new Buffer(JSON.parse(json));

console.log(copy);
// <Buffer 74 65 73 74>

### buf[index]

<!--type=property-->
@@ -411,6 +411,11 @@ Buffer.prototype.write = function(string, offset, length, encoding) {
};


Buffer.prototype.toJSON = function() {
return Array.prototype.slice.call(this, 0);
};


// toString(encoding, start=0, end=buffer.length)
Buffer.prototype.toString = function(encoding, start, end) {
encoding = String(encoding || 'utf8').toLowerCase();
@@ -748,3 +748,7 @@ Buffer(Buffer(0), 0, 0);
'new gnu gun' ].forEach(function(enc) {
assert.equal(Buffer.isEncoding(enc), false);
});


// GH-3905
assert.equal(JSON.stringify(Buffer('test')), '[116,101,115,116]');

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