http: docs deprecate ServerResponse.prototype.writeHeader() #11355

jasnell · 2017-02-13T21:02:25Z

The ServerResponse class has an undocumented writeHeader()
API that simply forwards on to the documented writeHead()
method. This adds a docs-only deprecation for the undocumented
method.

TODO: This will need to update the static deprecation identifier before landing

Checklist

make -j4 test (UNIX), or vcbuild test (Windows) passes
documentation is changed or added
commit message follows commit guidelines

Affected core subsystem(s)

http

evanlucas · 2017-02-13T21:09:14Z

-1, searching on github had a bunch of hits. What does 3 lines of code cost us to maintain?

jasnell · 2017-02-13T21:10:54Z

If we keep it, then it should either be docs only deprecated or added to the API documentation.

…

On Mon, Feb 13, 2017 at 1:09 PM Evan Lucas ***@***.***> wrote: -1, searching on github had a bunch of hits. What does 3 lines of code cost us to maintain? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#11355 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAa2ee_1mLv1XanXfk2jt1c5F7rei_t-ks5rcMZ_gaJpZM4L_t8d> .

evanlucas · 2017-02-13T21:13:08Z

+1 to documenting

jasnell · 2017-02-13T21:19:57Z

What about docs-only deprecation? It doesn't make much sense to have two supported methods that do identical things.

evanlucas · 2017-02-13T21:22:45Z

It doesn't make much sense to have two supported methods that do identical things.

Sure it does if it doesn't break working code. I think it should be documented as an alias to writeHead().

bnoordhuis · 2017-02-13T21:52:19Z

I'm inclined to disagree, it increases the cognitive overhead. Imagine you type res.writeH^N (or whatever your editor uses for auto-completion), wouldn't it be nice when it marked one of the suggestions as deprecated? You won't have to spend a second thinking which one you should use.

jasnell · 2017-02-13T22:24:59Z

I have to agree with @bnoordhuis.

mscdex · 2017-02-14T00:37:48Z

doc/api/deprecations.md

@@ -523,6 +523,12 @@ Type: Runtime
 of V8 5.8. It is replaced by Inspector which is activated with `--inspect`
 instead.

+<a id="DEP00XX"></a>


Do these placeholders get replaced when making a release, like with the API version metadata or when landing or ?

It will get replaced before landing. There's no automated check, however

Ok, I just had noticed that one of the other deprecation PRs already had a number assigned, so I was confused...

jasnell · 2017-02-14T22:04:06Z

@nodejs/ctc ... please give this one some thought. Should we deprecate writeHeader or document it as an acceptable alias for writeHead

addaleax · 2017-02-15T15:48:06Z

A documentation-only deprecation sounds fine to me.

ChALkeR · 2017-02-16T14:50:48Z

+1 to documenting as doc-only deprecated for now. I will do a search and perhaps report some issues to the modules that are using that, if needed.

jasnell · 2017-02-16T14:51:54Z

Will change to a docs deprecation! Thanks!

jasnell · 2017-02-16T21:14:06Z

@nodejs/ctc ... PTAL, updated to be a docs-only deprecation for the time being

jasnell · 2017-02-20T15:53:50Z

@evanlucas ... any objections to the docs-only deprecation?

jasnell · 2017-02-24T17:30:58Z

ping @evanlucas :-)

evanlucas · 2017-02-24T18:13:13Z

Fine with me. Thanks!

Doc-only deprecation of the undocumented res.writeHeader() API. Also makes res.writeHeader an alias of res.writeHead since the previous implementation simply deferred to that method.

Doc-only deprecation of the undocumented res.writeHeader() API. Also makes res.writeHeader an alias of res.writeHead since the previous implementation simply deferred to that method. PR-URL: #11355 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Rod Vagg <rod@vagg.org> Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>

jasnell · 2017-02-25T02:08:48Z

Landed in fb71ba4

ChALkeR · 2017-02-26T11:55:11Z

The grep is here: https://gist.github.com/ChALkeR/c153d517454a72f96ab758d7286e5495 =).

http-signature is a false positive (it defines its own .writeHeader(). There are probably more false positives.

That's 426 modules total and 35 modules above 1000 downloads/month.
Excluding tests/examples — 334 modules total and 24 modules above 1000 downloads/month.

res.writeHeader is an undocumented alias to res.writeHead It's docs-deprecated in nodejs/node#11355

ChALkeR · 2017-02-26T12:34:23Z

doc/api/deprecations.md

@@ -523,6 +523,17 @@ Type: Runtime
 of V8 5.8. It is replaced by Inspector which is activated with `--inspect`
 instead.

+<a id="DEP0063"></a>
+#### DEP0063: ServerResponse.prototype.writeHeader()


This should have been ### probably, atm its style is different from all the other deprecation entries on that page.

@ChALkeR

res.writeHeader is an undocumented alias to res.writeHead It's docs-deprecated in nodejs/node#11355 PR-URL: #15874 Credit: @ChALkeR Reviewed-By: @zkat

@ChALkeR

res.writeHeader is an undocumented alias to res.writeHead It's docs-deprecated in nodejs/node#11355 PR-URL: #15874 Credit: @ChALkeR Reviewed-By: @zkat

@ChALkeR

res.writeHeader is an undocumented alias to res.writeHead It's docs-deprecated in nodejs/node#11355 PR-URL: #15874 Credit: @ChALkeR Reviewed-By: @zkat

* **Async Hooks** * The `async_hooks` module has landed in core [[`4a7233c178`](nodejs@4a7233c178)] [nodejs#12892](nodejs#12892). * **Buffer** * Using the `--pending-deprecation` flag will cause Node.js to emit a deprecation warning when using `new Buffer(num)` or `Buffer(num)`. [[`d2d32ea5a2`](nodejs@d2d32ea5a2)] [nodejs#11968](nodejs#11968). * `new Buffer(num)` and `Buffer(num)` will zero-fill new `Buffer` instances [[`7eb1b4658e`](nodejs@7eb1b4658e)] [nodejs#12141](nodejs#12141). * Many `Buffer` methods now accept `Uint8Array` as input [[`beca3244e2`](nodejs@beca3244e2)] [nodejs#10236](nodejs#10236). * **Child Process** * Argument and kill signal validations have been improved [[`97a77288ce`](nodejs@97a77288ce)] [nodejs#12348](nodejs#12348), [[`d75fdd96aa`](nodejs@d75fdd96aa)] [nodejs#10423](nodejs#10423). * Child Process methods accept `Uint8Array` as input [[`627ecee9ed`](nodejs@627ecee9ed)] [nodejs#10653](nodejs#10653). * **Console** * Error events emitted when using `console` methods are now supressed. [[`f18e08d820`](nodejs@f18e08d820)] [nodejs#9744](nodejs#9744). * **Dependencies** * The npm client has been updated to 5.0.0 [[`3c3b36af0f`](nodejs@3c3b36af0f)] [nodejs#12936](nodejs#12936). * V8 has been updated to 5.8 with forward ABI stability to 6.0 [[`60d1aac8d2`](nodejs@60d1aac8d2)] [nodejs#12784](nodejs#12784). * **Domains** * Native `Promise` instances are now `Domain` aware [[`84dabe8373`](nodejs@84dabe8373)] [nodejs#12489](nodejs#12489). * **Errors** * We have started assigning static error codes to errors generated by Node.js. This has been done through multiple commits and is still a work in progress. * **File System** * The utility class `fs.SyncWriteStream` has been deprecated [[`7a55e34ef4`](nodejs@7a55e34ef4)] [nodejs#10467](nodejs#10467). * The deprecated `fs.read()` string interface has been removed [[`3c2a9361ff`](nodejs@3c2a9361ff)] [nodejs#9683](nodejs#9683). * **HTTP** * Improved support for userland implemented Agents [[`90403dd1d0`](nodejs@90403dd1d0)] [nodejs#11567](nodejs#11567). * Outgoing Cookie headers are concatenated into a single string [[`d3480776c7`](nodejs@d3480776c7)] [nodejs#11259](nodejs#11259). * The `httpResponse.writeHeader()` method has been deprecated [[`fb71ba4921`](nodejs@fb71ba4921)] [nodejs#11355](nodejs#11355). * New methods for accessing HTTP headers have been added to `OutgoingMessage` [[`3e6f1032a4`](nodejs@3e6f1032a4)] [nodejs#10805](nodejs#10805). * **Lib** * All deprecation messages have been assigned static identifiers [[`5de3cf099c`](nodejs@5de3cf099c)] [nodejs#10116](nodejs#10116). * The legacy `linkedlist` module has been removed [[`84a23391f6`](nodejs@84a23391f6)] [nodejs#12113](nodejs#12113). * **N-API** * Experimental support for the new N-API API has been added [[`56e881d0b0`](nodejs@56e881d0b0)] [nodejs#11975](nodejs#11975). * **Process** * Process warning output can be redirected to a file using the `--redirect-warnings` command-line argument [[`03e89b3ff2`](nodejs@03e89b3ff2)] [nodejs#10116](nodejs#10116). * Process warnings may now include additional detail [[`dd20e68b0f`](nodejs@dd20e68b0f)] [nodejs#12725](nodejs#12725). * **REPL** * REPL magic mode has been deprecated [[`3f27f02da0`](nodejs@3f27f02da0)] [nodejs#11599](nodejs#11599). * **Src** * `NODE_MODULE_VERSION` has been updated to 57 (nodejs@ec7cbaf266)] [nodejs#12995](nodejs#12995). * Add `--pending-deprecation` command-line argument and `NODE_PENDING_DEPRECATION` environment variable [[`a16b570f8c`](nodejs@a16b570f8c)] [nodejs#11968](nodejs#11968). * The `--debug` command-line argument has been deprecated. Note that using `--debug` will enable the *new* Inspector-based debug protocol as the legacy Debugger protocol previously used by Node.js has been removed. [[`010f864426`](nodejs@010f864426)] [nodejs#12949](nodejs#12949). * Throw when the `-c` and `-e` command-line arguments are used at the same time [[`a5f91ab230`](nodejs@a5f91ab230)] [nodejs#11689](nodejs#11689). * Throw when the `--use-bundled-ca` and `--use-openssl-ca` command-line arguments are used at the same time. [[`8a7db9d4b5`](nodejs@8a7db9d4b5)] [nodejs#12087](nodejs#12087). * **Stream** * `Stream` now supports `destroy()` and `_destroy()` APIs [[`b6e1d22fa6`](nodejs@b6e1d22fa6)] [nodejs#12925](nodejs#12925). * `Stream` now supports the `_final()` API [[`07c7f198db`](nodejs@07c7f198db)] [nodejs#12828](nodejs#12828). * **TLS** * The `rejectUnauthorized` option now defaults to `true` [[`348cc80a3c`](nodejs@348cc80a3c)] [nodejs#5923](nodejs#5923). * The `tls.createSecurePair()` API now emits a runtime deprecation [[`a2ae08999b`](nodejs@a2ae08999b)] [nodejs#11349](nodejs#11349). * A runtime deprecation will now be emitted when `dhparam` is less than 2048 bits [[`d523eb9c40`](nodejs@d523eb9c40)] [nodejs#11447](nodejs#11447). * **URL** * The WHATWG URL implementation is now a fully-supported Node.js API [[`d080ead0f9`](nodejs@d080ead0f9)] [nodejs#12710](nodejs#12710). * **Util** * `Symbol` keys are now displayed by default when using `util.inspect()` [[`5bfd13b81e`](nodejs@5bfd13b81e)] [nodejs#9726](nodejs#9726). * `toJSON` errors will be thrown when formatting `%j` [[`455e6f1dd8`](nodejs@455e6f1dd8)] [nodejs#11708](nodejs#11708). * Convert `inspect.styles` and `inspect.colors` to prototype-less objects [[`aab0d202f8`](nodejs@aab0d202f8)] [nodejs#11624](nodejs#11624). * The new `util.promisify()` API has been added [[`99da8e8e02`](nodejs@99da8e8e02)] [nodejs#12442](nodejs#12442). * **Zlib** * Support `Uint8Array` in Zlib convenience methods [[`91383e47fd`](nodejs@91383e47fd)] [nodejs#12001](nodejs#12001). * Zlib errors now use `RangeError` and `TypeError` consistently [[`b514bd231e`](nodejs@b514bd231e)] [nodejs#11391](nodejs#11391).

* **Async Hooks** * The `async_hooks` module has landed in core [[`4a7233c178`](4a7233c178)] [#12892](#12892). * **Buffer** * Using the `--pending-deprecation` flag will cause Node.js to emit a deprecation warning when using `new Buffer(num)` or `Buffer(num)`. [[`d2d32ea5a2`](d2d32ea5a2)] [#11968](#11968). * `new Buffer(num)` and `Buffer(num)` will zero-fill new `Buffer` instances [[`7eb1b4658e`](7eb1b4658e)] [#12141](#12141). * Many `Buffer` methods now accept `Uint8Array` as input [[`beca3244e2`](beca3244e2)] [#10236](#10236). * **Child Process** * Argument and kill signal validations have been improved [[`97a77288ce`](97a77288ce)] [#12348](#12348), [[`d75fdd96aa`](d75fdd96aa)] [#10423](#10423). * Child Process methods accept `Uint8Array` as input [[`627ecee9ed`](627ecee9ed)] [#10653](#10653). * **Console** * Error events emitted when using `console` methods are now supressed. [[`f18e08d820`](f18e08d820)] [#9744](#9744). * **Dependencies** * The npm client has been updated to 5.0.0 [[`3c3b36af0f`](3c3b36af0f)] [#12936](#12936). * V8 has been updated to 5.8 with forward ABI stability to 6.0 [[`60d1aac8d2`](60d1aac8d2)] [#12784](#12784). * **Domains** * Native `Promise` instances are now `Domain` aware [[`84dabe8373`](84dabe8373)] [#12489](#12489). * **Errors** * We have started assigning static error codes to errors generated by Node.js. This has been done through multiple commits and is still a work in progress. * **File System** * The utility class `fs.SyncWriteStream` has been deprecated [[`7a55e34ef4`](7a55e34ef4)] [#10467](#10467). * The deprecated `fs.read()` string interface has been removed [[`3c2a9361ff`](3c2a9361ff)] [#9683](#9683). * **HTTP** * Improved support for userland implemented Agents [[`90403dd1d0`](90403dd1d0)] [#11567](#11567). * Outgoing Cookie headers are concatenated into a single string [[`d3480776c7`](d3480776c7)] [#11259](#11259). * The `httpResponse.writeHeader()` method has been deprecated [[`fb71ba4921`](fb71ba4921)] [#11355](#11355). * New methods for accessing HTTP headers have been added to `OutgoingMessage` [[`3e6f1032a4`](3e6f1032a4)] [#10805](#10805). * **Lib** * All deprecation messages have been assigned static identifiers [[`5de3cf099c`](5de3cf099c)] [#10116](#10116). * The legacy `linkedlist` module has been removed [[`84a23391f6`](84a23391f6)] [#12113](#12113). * **N-API** * Experimental support for the new N-API API has been added [[`56e881d0b0`](56e881d0b0)] [#11975](#11975). * **Process** * Process warning output can be redirected to a file using the `--redirect-warnings` command-line argument [[`03e89b3ff2`](03e89b3ff2)] [#10116](#10116). * Process warnings may now include additional detail [[`dd20e68b0f`](dd20e68b0f)] [#12725](#12725). * **REPL** * REPL magic mode has been deprecated [[`3f27f02da0`](3f27f02da0)] [#11599](#11599). * **Src** * `NODE_MODULE_VERSION` has been updated to 57 (ec7cbaf266)] [#12995](#12995). * Add `--pending-deprecation` command-line argument and `NODE_PENDING_DEPRECATION` environment variable [[`a16b570f8c`](a16b570f8c)] [#11968](#11968). * The `--debug` command-line argument has been deprecated. Note that using `--debug` will enable the *new* Inspector-based debug protocol as the legacy Debugger protocol previously used by Node.js has been removed. [[`010f864426`](010f864426)] [#12949](#12949). * Throw when the `-c` and `-e` command-line arguments are used at the same time [[`a5f91ab230`](a5f91ab230)] [#11689](#11689). * Throw when the `--use-bundled-ca` and `--use-openssl-ca` command-line arguments are used at the same time. [[`8a7db9d4b5`](8a7db9d4b5)] [#12087](#12087). * **Stream** * `Stream` now supports `destroy()` and `_destroy()` APIs [[`b6e1d22fa6`](b6e1d22fa6)] [#12925](#12925). * `Stream` now supports the `_final()` API [[`07c7f198db`](07c7f198db)] [#12828](#12828). * **TLS** * The `rejectUnauthorized` option now defaults to `true` [[`348cc80a3c`](348cc80a3c)] [#5923](#5923). * The `tls.createSecurePair()` API now emits a runtime deprecation [[`a2ae08999b`](a2ae08999b)] [#11349](#11349). * A runtime deprecation will now be emitted when `dhparam` is less than 2048 bits [[`d523eb9c40`](d523eb9c40)] [#11447](#11447). * **URL** * The WHATWG URL implementation is now a fully-supported Node.js API [[`d080ead0f9`](d080ead0f9)] [#12710](#12710). * **Util** * `Symbol` keys are now displayed by default when using `util.inspect()` [[`5bfd13b81e`](5bfd13b81e)] [#9726](#9726). * `toJSON` errors will be thrown when formatting `%j` [[`455e6f1dd8`](455e6f1dd8)] [#11708](#11708). * Convert `inspect.styles` and `inspect.colors` to prototype-less objects [[`aab0d202f8`](aab0d202f8)] [#11624](#11624). * The new `util.promisify()` API has been added [[`99da8e8e02`](99da8e8e02)] [#12442](#12442). * **Zlib** * Support `Uint8Array` in Zlib convenience methods [[`91383e47fd`](91383e47fd)] [#12001](#12001). * Zlib errors now use `RangeError` and `TypeError` consistently [[`b514bd231e`](b514bd231e)] [#11391](#11391).

jasnell added the semver-major PRs that contain breaking changes and should be released in the next major version. label Feb 13, 2017

nodejs-github-bot added the http Issues or PRs related to the http subsystem. label Feb 13, 2017

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jasnell force-pushed the deprecate-writeheader branch from 65f0887 to 76d7771 Compare February 16, 2017 21:13

jasnell changed the title ~~http: deprecate ServerResponse.prototype.writeHeader()~~ http: docs deprecate ServerResponse.prototype.writeHeader() Feb 16, 2017

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ChALkeR self-requested a review February 19, 2017 09:29

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Node.js Foundation Core Technical Committee (CTC) Meeting 2017-02-22 nodejs/CTC#71

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http: docs-only deprecation of res.writeHeader()

d326364

Doc-only deprecation of the undocumented res.writeHeader() API. Also makes res.writeHeader an alias of res.writeHead since the previous implementation simply deferred to that method.

jasnell force-pushed the deprecate-writeheader branch from fd7229d to d326364 Compare February 25, 2017 02:03

jasnell closed this Feb 25, 2017

ChALkeR added a commit to ChALkeR/npm that referenced this pull request Feb 26, 2017

test: don't use undocumented res.writeHeader alias

1653c7e

res.writeHeader is an undocumented alias to res.writeHead It's docs-deprecated in nodejs/node#11355

ChALkeR mentioned this pull request Feb 26, 2017

test: don't use undocumented res.writeHeader alias npm/npm#15874

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8.0.0 Release Proposal #12220

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meta: handling of undocumented endpoint #14679

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