buffer: backport new buffer constructor APIs #5763

jasnell · 2016-03-17T17:40:47Z

Pull Request check-list

Does make -j8 test (UNIX) or vcbuild test nosign (Windows) pass with
this change (including linting)?
Is the commit message formatted according to [CONTRIBUTING.md][0]?
If this change fixes a bug (or a performance problem), is a regression
test (or a benchmark) included?
Is a documentation update included (if this change modifies
existing APIs, or introduces new ones)?

Affected core subsystem(s)

buffer

Description of change

This backports the new Buffer.alloc(), Buffer.allocUnsafe(), and Buffer.from() APIs for v5.

Also included in this backport is the change that allows fill('') to zero-fill (as opposed to doing nothing) and the additional byteOffset and length arguments for Buffer(arrayBuffer) and
Buffer.from(arrayBuffer).

This backport includes the new test cases.

This backport does not update all of the internal uses of the existing Buffer() constructor.

This backport also does not include the soft deprecation of the existing Buffer() constructor.

Refs: #5744
/cc: @Fishrock123 @trevnorris @nodejs/ctc @nodejs/lts

jasnell · 2016-03-17T17:43:23Z

lib/buffer.js

-    return fromString(arg, encoding);
+    if (typeof encodingOrOffset === 'string') {
+      throw new Error(
+        'If encoding is specified then the first argument must be a string'


Note: this particular bit is a semver-major change that was landed in master. I included it in the backport to ensure that the new api behavior in master would match what is backported. I can pull this new throw back out, however.

yeah let's keep this purely additive

Ok, pulled that throw back out and another. It's still not 100% "purely additive" in that it includes the change to fill('') to ensure it zero-fills as opposed to doing nothing.

jasnell · 2016-03-21T22:17:50Z

@nodejs/collaborators ... ping

trevnorris · 2016-03-21T23:33:06Z

Don't remember the discussion about back porting to v5.x, but assuming we did. LGTM.

jasnell · 2016-03-22T15:38:00Z

Adding this to CTC Agenda for 2016-03-23 just to make sure there are no @nodejs/ctc objections to backporting the API changes to v5 and v4 and the --zero-fill-buffers flag back to v5, v4, v0.12 and v0.10. The plan discussed by the LTS WG is that the the --zero-fill-buffers and API backports could be landed in the lts staging branches but that the releases wouldn't happen until around the time v6 is cut.

jasnell · 2016-03-23T21:34:58Z

Discussion on the CTC was to go ahead with in v5 but to hold off on backporting further back.

jasnell · 2016-03-23T21:48:49Z

@nodejs/ctc @nodejs/collaborators ... have one LGTM on this and no objections from CTC. However, it would be good to get some additional sign off. I'll give it 24 more hours for review then land tomorrow.

This backports the new `Buffer.alloc()`, `Buffer.allocUnsafe()`, and `Buffer.from()` APIs for v5. Also included in this backport is the change that allows fill('') to zero-fill (as opposed to doing nothing) and the additional `byteOffset` and `length` arguments for `Buffer(arrayBuffer)` and `Buffer.from(arrayBuffer)`. This backport includes the new test cases. This backport *does not* update all of the internal uses of the existing `Buffer()` constructor. This backport also *does not* include the soft deprecation of the existing `Buffer()` constructor.

jasnell · 2016-03-23T21:50:43Z

New CI: https://ci.nodejs.org/job/node-test-pull-request/2048/

jasnell · 2016-03-23T23:48:12Z

CI is green except for one unrelated failure.

This backports the new `Buffer.alloc()`, `Buffer.allocUnsafe()`, and `Buffer.from()` APIs for v5. Also included in this backport is the change that allows fill('') to zero-fill (as opposed to doing nothing) and the additional `byteOffset` and `length` arguments for `Buffer(arrayBuffer)` and `Buffer.from(arrayBuffer)`. This backport includes the new test cases. This backport *does not* update all of the internal uses of the existing `Buffer()` constructor. This backport also *does not* include the soft deprecation of the existing `Buffer()` constructor. PR-URL: #5763 Reviewed-By: Trevor Norris <trev.norris@gmail.com>

jasnell · 2016-03-24T20:37:30Z

Landed in v5.x in c1534e7

Notable changes: * buffer: * make byteLength work with ArrayBuffer & DataView (Jackson Tian) [#5255](#5255) * backport --zero-fill-buffers command line option (James M Snell) [#5744](#5744) * backport new buffer constructor APIs (James M Snell) [#5763](#5763) * add swap16() and swap32() methods (James M Snell) [#5724](#5724) * fs: add the fs.mkdtemp() function. (Florian MARGAINE) [#5333](#5333) * net: emit host in lookup event (HUANG Wei) [#5598](#5598) * node: --no-browser-globals configure flag (Fedor Indutny) [#5853](#5853) * npm: Upgrade to v3.8.3. (Forrest L Norvell) * repl: support standalone blocks (Prince J Wesley) [#5581](#5581) * src: override v8 thread defaults using cli options (Tom Gallacher) [#4344](#4344)

Notable changes: * buffer: * make byteLength work with ArrayBuffer & DataView (Jackson Tian) [#5255](#5255) * backport --zero-fill-buffers command line option (James M Snell) [#5744](#5744) * backport new buffer constructor APIs (James M Snell) [#5763](#5763) * add swap16() and swap32() methods (James M Snell) [#5724](#5724) * fs: add the fs.mkdtemp() function. (Florian MARGAINE) [#5333](#5333) * net: emit host in lookup event (HUANG Wei) [#5598](#5598) * node: --no-browser-globals configure flag (Fedor Indutny) [#5853](#5853) * npm: Upgrade to v3.8.3. Fixes a security flaw in the use of authentication tokens in HTTP requests that would allow an attacker to set up a server that could collect tokens from users of the command-line interface. Authentication tokens have previously been sent with every request made by the CLI for logged-in users, regardless of the destination of the request. This update fixes this by only including those tokens for requests made against the registry or registries used for the current install. (Forrest L Norvell) [npm#6](npm#6) * repl: support standalone blocks (Prince J Wesley) [#5581](#5581) * src: override v8 thread defaults using cli options (Tom Gallacher) [#4344](#4344)

Notable changes: * buffer: * make byteLength work with ArrayBuffer & DataView (Jackson Tian) [#5255](#5255) * backport --zero-fill-buffers command line option (James M Snell) [#5744](#5744) * backport new buffer constructor APIs (James M Snell) [#5763](#5763) * add swap16() and swap32() methods (James M Snell) [#5724](#5724) * fs: add the fs.mkdtemp() function. (Florian MARGAINE) [#5333](#5333) * net: emit host in lookup event (HUANG Wei) [#5598](#5598) * node: --no-browser-globals configure flag (Fedor Indutny) [#5853](#5853) * npm: Upgrade to v3.8.3. Fixes a security flaw in the use of authentication tokens in HTTP requests that would allow an attacker to set up a server that could collect tokens from users of the command-line interface. Authentication tokens have previously been sent with every request made by the CLI for logged-in users, regardless of the destination of the request. This update fixes this by only including those tokens for requests made against the registry or registries used for the current install. (Forrest L Norvell) [npm#6](npm#6) * repl: support standalone blocks (Prince J Wesley) [#5581](#5581) * src: override v8 thread defaults using cli options (Tom Gallacher) [#4344](#4344) PR-URL: #5970

c0b · 2016-04-24T18:07:13Z

doc/api/buffer.markdown

 ## Buffers and ES6 iteration

 Buffers can be iterated over using the ECMAScript 2015 (ES6) `for..of` syntax:

 ```js
-const buf = new Buffer([1, 2, 3]);
+const buf = Buffer(.from[1, 2, 3]);


this seems to be a typo; should be Buffer.from([1, 2, 3]); ??

ChALkeR · 2016-05-05T17:46:36Z

@jasnell This missed the #5833 (well, because this PR was created earilier), this creates a minor inconsistency between 5.x and 6.x in the new API.

jasnell · 2016-05-05T17:48:50Z

Yeah, as far as I know #5833 hasn't been backported yet to v5. I'll open a PR for that soon

feross · 2016-05-30T06:16:27Z

@jasnell Any chance we can also backport to Node.js v4? Once v0.10 and and v0.12 are unsupported at the end of the year, it would be nice to start advising people to use only the new Buffer APIs (Buffer.from, etc.) in new code.

If we have support in v4, that would make shims like safe-buffer unnecessary and make it a no-brainer best practice.

jasnell added buffer Issues and PRs related to the buffer subsystem. semver-minor PRs that contain new features and should be released in the next minor version. v5.x labels Mar 17, 2016

jasnell reviewed Mar 17, 2016
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jasnell added the ctc-agenda label Mar 22, 2016

rvagg mentioned this pull request Mar 23, 2016

Node.js Foundation Core Technical Committee (CTC) Meeting 2016-03-23 #5866

Closed

jasnell removed the ctc-agenda label Mar 23, 2016

jasnell added 2 commits March 23, 2016 14:49

Pull out new throws

c04c7bd

jasnell force-pushed the v5.x-new-buffer-api branch from 6c5bc34 to c04c7bd Compare March 23, 2016 21:49

jasnell closed this Mar 24, 2016

evanlucas mentioned this pull request Mar 31, 2016

v5.10.0 Release Proposal #5970

Closed

c0b reviewed Apr 24, 2016
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ChALkeR mentioned this pull request May 5, 2016

buffer: replace SlowBuffer with Buffer.allocUnsafeSlow(size) #5833

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buffer: backport new buffer constructor APIs #5763

buffer: backport new buffer constructor APIs #5763

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buffer: backport new buffer constructor APIs #5763

buffer: backport new buffer constructor APIs #5763

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jasnell commented Mar 17, 2016

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