From 9b2adc97d075d3fe4f41f77cfcb88a6a25b9ecfa Mon Sep 17 00:00:00 2001
From: Sebastian Hengst <aryx.github@gmx-topmail.de>
Date: Thu, 18 Jan 2024 19:52:08 +0100
Subject: [PATCH] Bug 1875340 - use JavaScript's DecompressionStream instead of
 'pako' package

---
 package.json                  |  1 -
 tests/ui/helpers/gzip_test.js | 12 ------------
 ui/helpers/gzip.js            | 16 ++++++++--------
 ui/job-view/pushes/Push.jsx   |  3 +--
 4 files changed, 9 insertions(+), 23 deletions(-)
 delete mode 100644 tests/ui/helpers/gzip_test.js

diff --git a/package.json b/package.json
index 9a1c0762173..f1d2203bd82 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,6 @@
     "mobx": "6.10.2",
     "moment": "2.29.4",
     "numeral": "2.0.6",
-    "pako": "2.0.4",
     "prop-types": "15.7.2",
     "query-string": "7.0.1",
     "react": "17.0.2",
diff --git a/tests/ui/helpers/gzip_test.js b/tests/ui/helpers/gzip_test.js
deleted file mode 100644
index 02f67411cac..00000000000
--- a/tests/ui/helpers/gzip_test.js
+++ /dev/null
@@ -1,12 +0,0 @@
-import { gzip } from 'pako';
-
-import decompress from '../../../ui/helpers/gzip';
-
-describe('gzip related functions', () => {
-  test('compress and decompress', async () => {
-    const str = JSON.stringify({ foo: 'bar' });
-    const compressed = await gzip(str);
-    const decompressed = await decompress(compressed);
-    expect(JSON.stringify(decompressed)).toBe(str);
-  });
-});
diff --git a/ui/helpers/gzip.js b/ui/helpers/gzip.js
index 38daa01d273..7817e0dcbf2 100644
--- a/ui/helpers/gzip.js
+++ b/ui/helpers/gzip.js
@@ -1,8 +1,8 @@
-import { inflate } from 'pako';
-
-export const unGzip = async (binData) => {
-  const decompressed = await inflate(binData, { to: 'string' });
-  return JSON.parse(decompressed);
-};
-
-export default unGzip;
+export default async function unGzip(blob) {
+  const decompressionStream = new DecompressionStream('gzip');
+  const decompressedStream = blob.stream().pipeThrough(decompressionStream);
+  const payloadText = await (
+    await new Response(decompressedStream).blob()
+  ).text();
+  return JSON.parse(payloadText);
+}
diff --git a/ui/job-view/pushes/Push.jsx b/ui/job-view/pushes/Push.jsx
index d28ff045c48..8a3b4c679af 100644
--- a/ui/job-view/pushes/Push.jsx
+++ b/ui/job-view/pushes/Push.jsx
@@ -79,8 +79,7 @@ const fetchGeckoDecisionArtifact = async (project, revision, filePath) => {
   if (url.endsWith('.gz')) {
     if ([200, 303, 304].includes(response.status)) {
       const blob = await response.blob();
-      const binData = await blob.arrayBuffer();
-      artifactContents = await decompress(binData);
+      artifactContents = await decompress(blob);
     }
   } else if (url.endsWith('.json')) {
     if ([200, 303, 304].includes(response.status)) {