From cfe296bcc904c589a28a8bd918279ef60ab5357c Mon Sep 17 00:00:00 2001
From: Adria Navarro <adria@budibase.com>
Date: Thu, 30 Jan 2025 10:55:57 +0100
Subject: [PATCH] Add polyfills
---
.../bundles/bson-polyfills.ivm.bundle.js | 52 ++++++++++++++-----
.../server/src/jsRunner/vm/isolated-vm.ts | 14 -----
2 files changed, 40 insertions(+), 26 deletions(-)
diff --git a/packages/server/src/jsRunner/bundles/bson-polyfills.ivm.bundle.js b/packages/server/src/jsRunner/bundles/bson-polyfills.ivm.bundle.js
index e7949042c8..94d08b84ed 100644
--- a/packages/server/src/jsRunner/bundles/bson-polyfills.ivm.bundle.js
+++ b/packages/server/src/jsRunner/bundles/bson-polyfills.ivm.bundle.js
@@ -78,17 +78,45 @@ if (typeof btoa !== "function") {
}
}
-class TextDecoder {
- constructorArgs
-
- constructor(...constructorArgs) {
- this.constructorArgs = constructorArgs
- }
-
- decode(...input) {
- return textDecoderCb({
- constructorArgs: this.constructorArgs,
- functionArgs: input,
- })
+if (typeof TextDecoder === "undefined") {
+ globalThis.TextDecoder = class {
+ constructor(encoding = "utf8") {
+ if (encoding !== "utf8") {
+ throw new Error(
+ `Only UTF-8 is supported in this polyfill. Recieved: ${encoding}`
+ )
+ }
+ }
+ decode(buffer) {
+ return String.fromCharCode(...buffer)
+ }
+ }
+}
+
+if (typeof TextEncoder === "undefined") {
+ globalThis.TextEncoder = class {
+ encode(str) {
+ const utf8 = []
+ for (const i = 0; i < str.length; i++) {
+ const codePoint = str.charCodeAt(i)
+
+ if (codePoint < 0x80) {
+ utf8.push(codePoint)
+ } else if (codePoint < 0x800) {
+ utf8.push(0xc0 | (codePoint >> 6))
+ utf8.push(0x80 | (codePoint & 0x3f))
+ } else if (codePoint < 0x10000) {
+ utf8.push(0xe0 | (codePoint >> 12))
+ utf8.push(0x80 | ((codePoint >> 6) & 0x3f))
+ utf8.push(0x80 | (codePoint & 0x3f))
+ } else {
+ utf8.push(0xf0 | (codePoint >> 18))
+ utf8.push(0x80 | ((codePoint >> 12) & 0x3f))
+ utf8.push(0x80 | ((codePoint >> 6) & 0x3f))
+ utf8.push(0x80 | (codePoint & 0x3f))
+ }
+ }
+ return new Uint8Array(utf8)
+ }
}
}
diff --git a/packages/server/src/jsRunner/vm/isolated-vm.ts b/packages/server/src/jsRunner/vm/isolated-vm.ts
index 3123bcaa44..37ee048dc2 100644
--- a/packages/server/src/jsRunner/vm/isolated-vm.ts
+++ b/packages/server/src/jsRunner/vm/isolated-vm.ts
@@ -161,21 +161,7 @@ export class IsolatedVM implements VM {
const bsonSource = loadBundle(BundleType.BSON)
- // "Polyfilling" text decoder and other utils. `bson.deserialize` requires decoding. We are creating a bridge function so we don't need to inject the full library
const bsonPolyfills = loadBundle(BundleType.BSON_POLYFILLS)
- this.addToContext({
- textDecoderCb: new ivm.Callback(
- (args: {
- constructorArgs: any
- functionArgs: Parameters<InstanceType<typeof TextDecoder>["decode"]>
- }) => {
- const result = new TextDecoder(...args.constructorArgs).decode(
- ...args.functionArgs
- )
- return result
- }
- ),
- })
const script = this.isolate.compileScriptSync(
`${bsonPolyfills};${bsonSource}`