Use wrapper for queries
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@ -1,63 +1,22 @@
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import ivm from "isolated-vm"
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import env from "../environment"
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import { IsolatedVM } from "../jsRunner/vm"
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const JS_TIMEOUT_MS = 1000
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class ScriptRunner {
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vm: IsolatedVM
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#code
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constructor(script: string, context: any) {
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const code = `let fn = () => {\n${script}\n}; results.out = fn();`
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this.vm = new IsolatedVM({ memoryLimit: 8 })
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this.vm.context = {
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...context,
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results: { out: "" },
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}
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this.vm.code = code
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this.#code = `let fn = () => {\n${script}\n}; results.out = fn();`
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}
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execute() {
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this.vm.runScript()
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const results = this.vm.getValue("results")
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return results.out
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}
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}
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class IsolatedVM {
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isolate: ivm.Isolate
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vm: ivm.Context
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#jail: ivm.Reference
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script: any
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constructor({ memoryLimit }: { memoryLimit: number }) {
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this.isolate = new ivm.Isolate({ memoryLimit })
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this.vm = this.isolate.createContextSync()
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this.#jail = this.vm.global
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this.#jail.setSync("global", this.#jail.derefInto())
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}
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getValue(key: string) {
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const ref = this.vm.global.getSync(key, { reference: true })
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const result = ref.copySync()
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ref.release()
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const vm = new IsolatedVM({
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memoryLimit: env.JS_RUNNER_MEMORY_LIMIT,
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timeout: JS_TIMEOUT_MS,
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}).withHelpers()
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const result = vm.execute(this.#code)
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return result
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}
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set context(context: Record<string, any>) {
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for (let key in context) {
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this.#jail.setSync(key, this.copyRefToVm(context[key]))
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}
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}
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set code(code: string) {
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this.script = this.isolate.compileScriptSync(code)
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}
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runScript() {
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this.script.runSync(this.vm, { timeout: JS_TIMEOUT_MS })
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}
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copyRefToVm(value: Object): ivm.Copy<Object> {
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return new ivm.ExternalCopy(value).copyInto({ release: true })
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}
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}
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export default ScriptRunner
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