From c337122ccba3ee2ad40521bd7f5fa90707e893b2 Mon Sep 17 00:00:00 2001
From: Sebastian Schubotz <me@sibbl.net>
Date: Sat, 24 Apr 2021 15:22:17 +0200
Subject: [PATCH] Add option to ignore certificate errors #9

---
 README.md |  1 +
 config.js |  2 ++
 index.js  | 19 ++++++++++++++-----
 3 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index e81efd2..4f3f55e 100644
--- a/README.md
+++ b/README.md
@@ -49,3 +49,4 @@ Some advanced variables for local usage which shouldn't be necessary when using
 - `OUTPUT_PATH=./output.png` (destination of rendered image. `OUTPUT_2`, `OUTPUT_3`, ... is also supported)
 - `PORT=5000` (port of server, which returns the last image)
 - `USE_IMAGE_MAGICK=false` (use ImageMagick instead of GraphicsMagick)
+- `UNSAFE_IGNORE_CERTIFICATE_ERRORS=true` (ignore certificate errors of e.g. self-signed certificates at your own risk)
diff --git a/config.js b/config.js
index a3b588a..322d8cc 100644
--- a/config.js
+++ b/config.js
@@ -42,4 +42,6 @@ module.exports = {
   renderingTimeout: process.env.RENDERING_TIMEOUT || 10000,
   language: process.env.LANGUAGE || "en",
   debug: process.env.DEBUG === "true",
+  ignoreCertificateErrors:
+    process.env.UNSAFE_IGNORE_CERTIFICATE_ERRORS === "true",
 };
diff --git a/index.js b/index.js
index 574f99d..55e7140 100644
--- a/index.js
+++ b/index.js
@@ -26,7 +26,8 @@ const gm = require("gm");
       "--disable-dev-shm-usage",
       "--no-sandbox",
       `--lang=${config.language}`,
-    ],
+      config.ignoreCertificateErrors && "--ignore-certificate-errors",
+    ].filter((x) => x),
     headless: config.debug !== true,
   });
 
@@ -76,9 +77,9 @@ const gm = require("gm");
       pageNumber.length > config.pages.length ||
       pageNumber < 1
     ) {
-      console.error('Invalid page requested: ' + pageNumber);
+      console.error("Invalid page requested: " + pageNumber);
       response.writeHead(400);
-      response.end('Invalid page');
+      response.end("Invalid page");
       return;
     }
     try {
@@ -113,7 +114,11 @@ async function renderAndConvertAsync(browser) {
     await renderUrlToImageAsync(browser, pageConfig, url, tempPath);
 
     console.log(`Converting rendered screenshot of ${url} to grayscale png...`);
-    await convertImageToKindleCompatiblePngAsync(pageConfig, tempPath, outputPath);
+    await convertImageToKindleCompatiblePngAsync(
+      pageConfig,
+      tempPath,
+      outputPath
+    );
 
     fs.unlink(tempPath);
     console.log(`Finished ${url}`);
@@ -181,7 +186,11 @@ async function renderUrlToImageAsync(browser, pageConfig, url, path) {
   }
 }
 
-function convertImageToKindleCompatiblePngAsync(pageConfig, inputPath, outputPath) {
+function convertImageToKindleCompatiblePngAsync(
+  pageConfig,
+  inputPath,
+  outputPath
+) {
   return new Promise((resolve, reject) => {
     gm(inputPath)
       .options({