From 7b7f84ba45097a82f05cc007d4d6c146c39ed37e Mon Sep 17 00:00:00 2001
From: Sebastian Beltran <bjohansebas@gmail.com>
Date: Thu, 7 Nov 2024 10:45:35 -0500
Subject: [PATCH 1/2] ci: add CodeQL (SAST) (#204)

---
 .github/workflows/codeql.yml | 66 ++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 .github/workflows/codeql.yml

diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
new file mode 100644
index 0000000..cd41192
--- /dev/null
+++ b/.github/workflows/codeql.yml
@@ -0,0 +1,66 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+on:
+  push:
+    branches: ["master"]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: ["master"]
+  schedule:
+    - cron: "0 0 * * 1"
+
+permissions:
+  contents: read
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+
+      # Initializes the CodeQL tools for scanning.
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@662472033e021d55d94146f66f6058822b0b39fd # v3.27.0
+        with:
+          languages: javascript
+          # If you wish to specify custom queries, you can do so here or in a config file.
+          # By default, queries listed here will override any specified in a config file.
+          # Prefix the list here with "+" to use these queries and those in the config file.
+
+      # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+      # If this step fails, then you should remove it and run the build manually (see below)
+      # - name: Autobuild
+      #   uses: github/codeql-action/autobuild@662472033e021d55d94146f66f6058822b0b39fd # v3.27.0
+
+      # ℹ️ Command-line programs to run using the OS shell.
+      # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
+
+      #   If the Autobuild fails above, remove it and uncomment the following three lines.
+      #   modify them (or add more) to build your code if your project, please refer to the EXAMPLE below for guidance.
+
+      # - run: |
+      #   echo "Run, Build Application using script"
+      #   ./location_of_script_within_repo/buildscript.sh
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@662472033e021d55d94146f66f6058822b0b39fd # v3.27.0
+        with:
+          category: "/language:javascript"
\ No newline at end of file

From 8e5641c188f766750900858da96bf596851f77ca Mon Sep 17 00:00:00 2001
From: maritz <maritz@users.noreply.github.com>
Date: Sat, 9 Nov 2024 18:28:00 +0100
Subject: [PATCH 2/2] Use headersSent instead of  _header (#129)

* fix: change usage of _header to headersSernt

* improve logic

* update history

---------

Co-authored-by: Sebastian Beltran <bjohansebas@gmail.com>
---
 HISTORY.md |  4 ++++
 index.js   | 18 ++++++++++++++++--
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/HISTORY.md b/HISTORY.md
index 7f625d0..3d224ed 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,3 +1,7 @@
+unreleased
+==========
+  * Use `res.headersSent` when available
+
 1.7.5 / 2024-10-31
 ==========
 
diff --git a/index.js b/index.js
index c7494e7..332e4ab 100644
--- a/index.js
+++ b/index.js
@@ -80,7 +80,7 @@ function compression (options) {
         return false
       }
 
-      if (!this._header) {
+      if (!headersSent(res)) {
         this._implicitHeader()
       }
 
@@ -94,7 +94,7 @@ function compression (options) {
         return false
       }
 
-      if (!this._header) {
+      if (!headersSent(res)) {
         // estimate the length
         if (!this.getHeader('Content-Length')) {
           length = chunkLength(chunk, encoding)
@@ -281,3 +281,17 @@ function toBuffer (chunk, encoding) {
     ? chunk
     : Buffer.from(chunk, encoding)
 }
+
+/**
+ * Determine if the response headers have been sent.
+ *
+ * @param {object} res
+ * @returns {boolean}
+ * @private
+ */
+
+function headersSent (res) {
+  return typeof res.headersSent !== 'boolean'
+    ? Boolean(res._header)
+    : res.headersSent
+}