Misc Fixes

Makefile

@@ -10,6 +10,12 @@ pretest:
 test:
 	sam local invoke --template _/amazon/template.yml --event _/amazon/events/example.com.json node20
 
+test16:
+	sam local invoke --template _/amazon/template.yml --event _/amazon/events/example.com.json node16
+
+test18:
+	sam local invoke --template _/amazon/template.yml --event _/amazon/events/example.com.json node18
+
 %.zip:
 	npm install --fund=false --package-lock=false
 	npm run build

README.md

@@ -204,6 +204,50 @@ From what I can tell, `headless_shell` does not seem to include support for the
 
 Try marking this package as an external. Ref: https://webpack.js.org/configuration/externals/
 
+### I'm experiencing timeouts or failures closing Chromium
+
+This is a common issue. Chromium sometimes opens up more pages than you ask for. You can try the following
+
+```typescript
+for (const page of await browser.pages()) {
+  await page.close();
+}
+await browser.close();
+```
+
+You can also try the following if one of the calls is hanging for some reason.
+
+```typescript
+await Promise.race([browser.close(), browser.close(), browser.close()]);
+```
+
+Always `await browser.close()`, even if your script is returning an error.
+
+### I need Accessible pdf files
+
+This is due to the way @sparticuz/chromium is built. If you require accessible pdf's, you'll need to
+recompile chromium yourself with the following patch. You can then use that binary with @sparticuz/chromium-min.
+
+_Note_: This will increase the time required to generate a PDF.
+
+```patch
+diff --git a/_/ansible/plays/chromium.yml b/_/ansible/plays/chromium.yml
+index b42c740..49111d7 100644
+--- a/_/ansible/plays/chromium.yml
++++ b/_/ansible/plays/chromium.yml
+@@ -249,8 +249,9 @@
+           blink_symbol_level = 0
+           dcheck_always_on = false
+           disable_histogram_support = false
+-          enable_basic_print_dialog = false
+           enable_basic_printing = true
++          enable_pdf = true
++          enable_tagged_pdf = true
+           enable_keystone_registration_framework = false
+           enable_linux_installer = false
+           enable_media_remoting = false
+```
+
 ## Fonts
 
 The Amazon Linux 2 AWS Lambda runtime is not provisioned with any font faces.
@@ -260,8 +304,8 @@ By default, this package uses `swiftshader`/`angle` to do CPU acceleration for W
 | `args`                              | `Array<string>`   | Provides a list of recommended additional [Chromium flags](https://github.com/GoogleChrome/chrome-launcher/blob/master/docs/chrome-flags-for-tools.md). |
 | `defaultViewport`                   | `Object`          | Returns a sensible default viewport for serverless.                                                                                                     |
 | `executablePath(location?: string)` | `Promise<string>` | Returns the path the Chromium binary was extracted to.                                                                                                  |
-| `setHeadlessMode`                   | `void`            | Sets the headless mode to either `true` or `"shell"`                                                                                                      |
-| `headless`                          | `true \| "shell"`   | Returns `true` or `"shell"` depending on what version of chrome's headless you are running                                                                |
+| `setHeadlessMode`                   | `void`            | Sets the headless mode to either `true` or `"shell"`                                                                                                    |
+| `headless`                          | `true \| "shell"` | Returns `true` or `"shell"` depending on what version of chrome's headless you are running                                                              |
 | `setGraphicsMode`                   | `void`            | Sets the graphics mode to either `true` or `false`                                                                                                      |
 | `graphics`                          | `boolean`         | Returns a boolean depending on whether webgl is enabled or disabled                                                                                     |
 

_/amazon/handlers/index.js

@@ -1,5 +1,5 @@
-const { ok } = require("assert");
-const { createHash } = require("crypto");
+const { ok } = require("node:assert");
+const { createHash } = require("node:crypto");
 const puppeteer = require("puppeteer-core");
 const chromium = require("@sparticuz/chromium");
 
@@ -18,15 +18,8 @@ exports.handler = async (event, context) => {
 
     console.log("Chromium version", await browser.version());
 
-    const contexts = [browser.defaultBrowserContext()];
-
-    while (contexts.length < event.length) {
-      contexts.push(await browser.createBrowserContext());
-    }
-
-    for (let context of contexts) {
-      const job = event.shift();
-      const page = await context.newPage();
+    for (let job of event) {
+      const page = await browser.newPage();
 
       if (job.hasOwnProperty("url") === true) {
         await page.goto(job.url, { waitUntil: ["domcontentloaded", "load"] });
@@ -68,6 +61,9 @@ exports.handler = async (event, context) => {
     throw error.message;
   } finally {
     if (browser !== null) {
+      for (const page of await browser.pages()) {
+        await page.close();
+      }
       await browser.close();
     }
   }

package.json

@@ -40,13 +40,13 @@
     "tar-fs": "^3.0.5"
   },
   "devDependencies": {
-    "@tsconfig/node16": "^16.1.1",
-    "@tsconfig/strictest": "^2.0.3",
+    "@tsconfig/node20": "^20.1.4",
+    "@tsconfig/strictest": "^2.0.5",
     "@types/follow-redirects": "^1.14.4",
-    "@types/node": "^20.11.30",
+    "@types/node": "^20.12.3",
     "@types/tar-fs": "^2.0.4",
     "clean-modules": "^3.0.5",
-    "typescript": "^5.4.2"
+    "typescript": "^5.4.3"
   },
   "engines": {
     "node": ">= 16"

source/index.ts

@@ -240,9 +240,11 @@ class Chromium {
     ];
 
     // https://chromium.googlesource.com/chromium/src/+/main/docs/gpu/swiftshader.md
-    this.graphics
-      ? graphicsFlags.push("--use-gl=angle", "--use-angle=swiftshader")
-      : graphicsFlags.push("--disable-webgl");
+    // Blocked by https://github.com/Sparticuz/chromium/issues/247
+    //this.graphics
+    //  ? graphicsFlags.push("--use-gl=angle", "--use-angle=swiftshader")
+    //  : graphicsFlags.push("--disable-webgl");
+    graphicsFlags.push("--use-gl=angle", "--use-angle=swiftshader");
 
     const insecureFlags = [
       "--allow-running-insecure-content", // https://source.chromium.org/search?q=lang:cpp+symbol:kAllowRunningInsecureContent&ss=chromium

source/lambdafs.ts

@@ -72,4 +72,4 @@ class LambdaFS {
   }
 }
 
-export = LambdaFS;
+export default LambdaFS;

tsconfig.json

@@ -1,10 +1,10 @@
 {
-  "extends": ["@tsconfig/node16/tsconfig", "@tsconfig/strictest"],
+  "extends": ["@tsconfig/node20/tsconfig", "@tsconfig/strictest"],
   "compilerOptions": {
     "declaration": true,
-    "lib": ["dom", "ES2021"],
-    "module": "Node16",
-    "moduleResolution": "Node16",
+    "lib": ["dom", "ES2023"],
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
     "outDir": "build"
   },
   "include": ["source"]