zlib: add ArrayBuffer support

doc/api/zlib.md

@@ -286,6 +286,9 @@ Compression strategy.
 <!-- YAML
 added: v0.11.1
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/16042
+    description: The `dictionary` option can be an ArrayBuffer.
   - version: v8.0.0
     pr-url: https://github.com/nodejs/node/pull/12001
     description: The `dictionary` option can be an Uint8Array now.
@@ -308,8 +311,8 @@ ignored by the decompression classes.
 * `level` {integer} (compression only)
 * `memLevel` {integer} (compression only)
 * `strategy` {integer} (compression only)
-* `dictionary` {Buffer|TypedArray|DataView} (deflate/inflate only, empty dictionary by
-  default)
+* `dictionary` {Buffer|TypedArray|DataView|ArrayBuffer} (deflate/inflate only,
+  empty dictionary by default)
 * `info` {boolean} (If `true`, returns an object with `buffer` and `engine`)
 
 See the description of `deflateInit2` and `inflateInit2` at
@@ -511,9 +514,10 @@ Creates and returns a new [Unzip][] object with the given [options][].
 
 <!--type=misc-->
 
-All of these take a [`Buffer`][], [`TypedArray`][], [`DataView`][], or string as
-the first argument, an optional second argument to supply options to the `zlib`
-classes and will call the supplied callback with `callback(error, result)`.
+All of these take a [`Buffer`][], [`TypedArray`][], [`DataView`][],
+[`ArrayBuffer`][] or string as the first argument, an optional second argument
+to supply options to the `zlib` classes and will call the supplied callback
+with `callback(error, result)`.
 
 Every method has a `*Sync` counterpart, which accept the same arguments, but
 without a callback.
@@ -522,6 +526,9 @@ without a callback.
 <!-- YAML
 added: v0.6.0
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/16042
+    description: The `buffer` parameter can be an ArrayBuffer.
   - version: v8.0.0
     pr-url: https://github.com/nodejs/node/pull/12223
     description: The `buffer` parameter can be any TypedArray or DataView now.
@@ -533,6 +540,9 @@ changes:
 <!-- YAML
 added: v0.11.12
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/16042
+    description: The `buffer` parameter can be an ArrayBuffer.
   - version: v8.0.0
     pr-url: https://github.com/nodejs/node/pull/12223
     description: The `buffer` parameter can be any TypedArray or DataView now.
@@ -541,7 +551,7 @@ changes:
     description: The `buffer` parameter can be an Uint8Array now.
 -->
 
-- `buffer` {Buffer|TypedArray|DataView|string}
+- `buffer` {Buffer|TypedArray|DataView|ArrayBuffer|string}
 
 Compress a chunk of data with [Deflate][].
 
@@ -560,6 +570,9 @@ changes:
 <!-- YAML
 added: v0.11.12
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/16042
+    description: The `buffer` parameter can be an ArrayBuffer.
   - version: v8.0.0
     pr-url: https://github.com/nodejs/node/pull/12223
     description: The `buffer` parameter can be any TypedArray or DataView now.
@@ -568,14 +581,17 @@ changes:
     description: The `buffer` parameter can be an Uint8Array now.
 -->
 
-- `buffer` {Buffer|TypedArray|DataView|string}
+- `buffer` {Buffer|TypedArray|DataView|ArrayBuffer|string}
 
 Compress a chunk of data with [DeflateRaw][].
 
 ### zlib.gunzip(buffer[, options], callback)
 <!-- YAML
 added: v0.6.0
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/16042
+    description: The `buffer` parameter can be an ArrayBuffer.
   - version: v8.0.0
     pr-url: https://github.com/nodejs/node/pull/12223
     description: The `buffer` parameter can be any TypedArray or DataView now.
@@ -587,6 +603,9 @@ changes:
 <!-- YAML
 added: v0.11.12
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/16042
+    description: The `buffer` parameter can be an ArrayBuffer.
   - version: v8.0.0
     pr-url: https://github.com/nodejs/node/pull/12223
     description: The `buffer` parameter can be any TypedArray or DataView now.
@@ -595,14 +614,17 @@ changes:
     description: The `buffer` parameter can be an Uint8Array now.
 -->
 
-- `buffer` {Buffer|TypedArray|DataView|string}
+- `buffer` {Buffer|TypedArray|DataView|ArrayBuffer|string}
 
 Decompress a chunk of data with [Gunzip][].
 
 ### zlib.gzip(buffer[, options], callback)
 <!-- YAML
 added: v0.6.0
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/16042
+    description: The `buffer` parameter can be an ArrayBuffer.
   - version: v8.0.0
     pr-url: https://github.com/nodejs/node/pull/12223
     description: The `buffer` parameter can be any TypedArray or DataView now.
@@ -614,6 +636,9 @@ changes:
 <!-- YAML
 added: v0.11.12
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/16042
+    description: The `buffer` parameter can be an ArrayBuffer.
   - version: v8.0.0
     pr-url: https://github.com/nodejs/node/pull/12223
     description: The `buffer` parameter can be any TypedArray or DataView now.
@@ -622,14 +647,17 @@ changes:
     description: The `buffer` parameter can be an Uint8Array now.
 -->
 
-- `buffer` {Buffer|TypedArray|DataView|string}
+- `buffer` {Buffer|TypedArray|DataView|ArrayBuffer|string}
 
 Compress a chunk of data with [Gzip][].
 
 ### zlib.inflate(buffer[, options], callback)
 <!-- YAML
 added: v0.6.0
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/16042
+    description: The `buffer` parameter can be an ArrayBuffer.
   - version: v8.0.0
     pr-url: https://github.com/nodejs/node/pull/12223
     description: The `buffer` parameter can be any TypedArray or DataView now.
@@ -641,6 +669,9 @@ changes:
 <!-- YAML
 added: v0.11.12
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/16042
+    description: The `buffer` parameter can be an ArrayBuffer.
   - version: v8.0.0
     pr-url: https://github.com/nodejs/node/pull/12223
     description: The `buffer` parameter can be any TypedArray or DataView now.
@@ -649,14 +680,17 @@ changes:
     description: The `buffer` parameter can be an Uint8Array now.
 -->
 
-- `buffer` {Buffer|TypedArray|DataView|string}
+- `buffer` {Buffer|TypedArray|DataView|ArrayBuffer|string}
 
 Decompress a chunk of data with [Inflate][].
 
 ### zlib.inflateRaw(buffer[, options], callback)
 <!-- YAML
 added: v0.6.0
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/16042
+    description: The `buffer` parameter can be an ArrayBuffer.
   - version: v8.0.0
     pr-url: https://github.com/nodejs/node/pull/12223
     description: The `buffer` parameter can be any TypedArray or DataView now.
@@ -668,6 +702,9 @@ changes:
 <!-- YAML
 added: v0.11.12
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/16042
+    description: The `buffer` parameter can be an ArrayBuffer.
   - version: v8.0.0
     pr-url: https://github.com/nodejs/node/pull/12223
     description: The `buffer` parameter can be any TypedArray or DataView now.
@@ -676,14 +713,17 @@ changes:
     description: The `buffer` parameter can be an Uint8Array now.
 -->
 
-- `buffer` {Buffer|TypedArray|DataView|string}
+- `buffer` {Buffer|TypedArray|DataView|ArrayBuffer|string}
 
 Decompress a chunk of data with [InflateRaw][].
 
 ### zlib.unzip(buffer[, options], callback)
 <!-- YAML
 added: v0.6.0
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/16042
+    description: The `buffer` parameter can be an ArrayBuffer.
   - version: v8.0.0
     pr-url: https://github.com/nodejs/node/pull/12223
     description: The `buffer` parameter can be any TypedArray or DataView now.
@@ -695,6 +735,9 @@ changes:
 <!-- YAML
 added: v0.11.12
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/16042
+    description: The `buffer` parameter can be an ArrayBuffer.
   - version: v8.0.0
     pr-url: https://github.com/nodejs/node/pull/12223
     description: The `buffer` parameter can be any TypedArray or DataView now.
@@ -703,12 +746,13 @@ changes:
     description: The `buffer` parameter can be an Uint8Array now.
 -->
 
-- `buffer` {Buffer|TypedArray|DataView|string}
+- `buffer` {Buffer|TypedArray|DataView|ArrayBuffer|string}
 
 Decompress a chunk of data with [Unzip][].
 
 [`.flush()`]: #zlib_zlib_flush_kind_callback
 [`Accept-Encoding`]: https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.3
+[`ArrayBuffer`]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer
 [`Buffer`]: buffer.html#buffer_class_buffer
 [`Content-Encoding`]: https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.11
 [`DataView`]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView

lib/zlib.js

@@ -24,6 +24,7 @@
 const errors = require('internal/errors');
 const Transform = require('_stream_transform');
 const { _extend } = require('util');
+const { isAnyArrayBuffer } = process.binding('util');
 const { isArrayBufferView } = require('internal/util/types');
 const binding = process.binding('zlib');
 const assert = require('assert').ok;
@@ -67,6 +68,8 @@ function zlibBuffer(engine, buffer, callback) {
   if (isArrayBufferView(buffer) &&
       Object.getPrototypeOf(buffer) !== Buffer.prototype) {
     buffer = Buffer.from(buffer.buffer, buffer.byteOffset, buffer.byteLength);
+  } else if (isAnyArrayBuffer(buffer)) {
+    buffer = Buffer.from(buffer);
   }
   engine.buffers = null;
   engine.nread = 0;
@@ -114,9 +117,14 @@ function zlibBufferSync(engine, buffer) {
   if (typeof buffer === 'string') {
     buffer = Buffer.from(buffer);
   } else if (!isArrayBufferView(buffer)) {
-    throw new errors.TypeError('ERR_INVALID_ARG_TYPE',
-                               'buffer',
-                               ['string', 'Buffer', 'TypedArray', 'DataView']);
+    if (isAnyArrayBuffer(buffer)) {
+      buffer = Buffer.from(buffer);
+    } else {
+      throw new errors.TypeError('ERR_INVALID_ARG_TYPE',
+                                 'buffer',
+                                 ['string', 'Buffer', 'TypedArray', 'DataView',
+                                  'ArrayBuffer']);
+    }
   }
   buffer = processChunkSync(engine, buffer, engine._finishFlushFlag);
   if (engine._info)
@@ -245,9 +253,13 @@ function Zlib(opts, mode) {
 
     dictionary = opts.dictionary;
     if (dictionary !== undefined && !isArrayBufferView(dictionary)) {
-      throw new errors.TypeError('ERR_INVALID_OPT_VALUE',
-                                 'dictionary',
-                                 dictionary);
+      if (isAnyArrayBuffer(dictionary)) {
+        dictionary = Buffer.from(dictionary);
+      } else {
+        throw new errors.TypeError('ERR_INVALID_OPT_VALUE',
+                                   'dictionary',
+                                   dictionary);
+      }
     }
 
     if (opts.encoding || opts.objectMode || opts.writableObjectMode) {

test/common/README.md

@@ -124,6 +124,13 @@ Checks if `pathname` exists
 
 Returns an instance of all possible `ArrayBufferView`s of the provided Buffer.
 
+### getBufferSources(buf)
+* `buf` [<Buffer>]
+* return [<BufferSource[]>]
+
+Returns an instance of all possible `BufferSource`s of the provided Buffer,
+consisting of all `ArrayBufferView` and an `ArrayBuffer`.
+
 ### getCallSite(func)
 * `func` [<Function>]
 * return [<String>]

test/common/index.js

@@ -805,6 +805,10 @@ exports.getArrayBufferViews = function getArrayBufferViews(buf) {
   return out;
 };
 
+exports.getBufferSources = function getBufferSources(buf) {
+  return [...exports.getArrayBufferViews(buf), new Uint8Array(buf).buffer];
+};
+
 // Crash the process on unhandled rejections.
 exports.crashOnUnhandledRejection = function() {
   process.on('unhandledRejection',

test/parallel/test-zlib-convenience-methods.js

@@ -43,7 +43,7 @@ const optsInfo = {
 for (const [type, expect] of [
   ['string', expectStr],
   ['Buffer', expectBuf],
-  ...common.getArrayBufferViews(expectBuf).map((obj) =>
+  ...common.getBufferSources(expectBuf).map((obj) =>
     [obj[Symbol.toStringTag], obj]
   )
 ]) {

test/parallel/test-zlib-dictionary.js

@@ -167,7 +167,7 @@ function deflateRawResetDictionaryTest(spdyDict) {
   });
 }
 
-for (const dict of [spdyDict, ...common.getArrayBufferViews(spdyDict)]) {
+for (const dict of [spdyDict, ...common.getBufferSources(spdyDict)]) {
   basicDictionaryTest(dict);
   deflateResetDictionaryTest(dict);
   rawDictionaryTest(dict);

test/parallel/test-zlib-not-string-or-buffer.js

@@ -13,7 +13,7 @@ const zlib = require('zlib');
       code: 'ERR_INVALID_ARG_TYPE',
       type: TypeError,
       message: 'The "buffer" argument must be one of type string, Buffer, ' +
-               'TypedArray, or DataView'
+               'TypedArray, DataView, or ArrayBuffer'
     }
   );
 });