stream: add support for deflate-raw format to webstreams compression

this change makes `deflate-raw` a valid parameter for both
CompressionStream and DecompressionStream constructors

it makes node's implementation consistent with what modern browsers
support and what specification calls for

see: https://wicg.github.io/compression/#compression-stream
PR-URL: #50097
Reviewed-By: Yagiz Nizipli <[email protected]>
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Filip Skokan <[email protected]>

Author: pirxpilot

doc/api/webstreams.md

@@ -1416,9 +1416,13 @@ changes:
 
 <!-- YAML
 added: v17.0.0
+changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/50097
+    description: format now accepts `deflate-raw` value.
 -->
 
-* `format` {string} One of either `'deflate'` or `'gzip'`.
+* `format` {string} One of `'deflate'`, `'deflate-raw'`, or `'gzip'`.
 
 #### `compressionStream.readable`
 
@@ -1450,9 +1454,13 @@ changes:
 
 <!-- YAML
 added: v17.0.0
+changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/50097
+    description: format now accepts `deflate-raw` value.
 -->
 
-* `format` {string} One of either `'deflate'` or `'gzip'`.
+* `format` {string} One of `'deflate'`, `'deflate-raw'`, or `'gzip'`.
 
 #### `decompressionStream.readable`
 

lib/internal/webstreams/compression.js

@@ -51,14 +51,17 @@ function isDecompressionStream(value) {
 
 class CompressionStream {
   /**
-   * @param {'deflate'|'gzip'} format
+   * @param {'deflate'|'deflate-raw'|'gzip'} format
    */
   constructor(format) {
     this[kType] = 'CompressionStream';
     switch (format) {
       case 'deflate':
         this[kHandle] = lazyZlib().createDeflate();
         break;
+      case 'deflate-raw':
+        this[kHandle] = lazyZlib().createDeflateRaw();
+        break;
       case 'gzip':
         this[kHandle] = lazyZlib().createGzip();
         break;
@@ -100,14 +103,17 @@ class CompressionStream {
 
 class DecompressionStream {
   /**
-   * @param {'deflate'|'gzip'} format
+   * @param {'deflate'|'deflate-raw'|'gzip'} format
    */
   constructor(format) {
     this[kType] = 'DecompressionStream';
     switch (format) {
       case 'deflate':
         this[kHandle] = lazyZlib().createInflate();
         break;
+      case 'deflate-raw':
+        this[kHandle] = lazyZlib().createInflateRaw();
+        break;
       case 'gzip':
         this[kHandle] = lazyZlib().createGunzip();
         break;

test/parallel/test-whatwg-webstreams-compression.js

@@ -41,7 +41,7 @@ async function test(format) {
   ]);
 }
 
-Promise.all(['gzip', 'deflate'].map((i) => test(i))).then(common.mustCall());
+Promise.all(['gzip', 'deflate', 'deflate-raw'].map((i) => test(i))).then(common.mustCall());
 
 [1, 'hello', false, {}].forEach((i) => {
   assert.throws(() => new CompressionStream(i), {