"use strict";
/**
* @license
* Copyright 2017 Google Inc.
* SPDX-License-Identifier: Apache-2.0
*/
var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
if (value !== null && value !== void 0) {
if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
var dispose;
if (async) {
if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
dispose = value[Symbol.asyncDispose];
}
if (dispose === void 0) {
if (!Symbol.dispose) throw new TypeError("Symbol.dispose is not defined.");
dispose = value[Symbol.dispose];
}
if (typeof dispose !== "function") throw new TypeError("Object not disposable.");
env.stack.push({ value: value, dispose: dispose, async: async });
}
else if (async) {
env.stack.push({ async: true });
}
return value;
};
var __disposeResources = (this && this.__disposeResources) || (function (SuppressedError) {
return function (env) {
function fail(e) {
env.error = env.hasError ? new SuppressedError(e, env.error, "An error was suppressed during disposal.") : e;
env.hasError = true;
}
function next() {
while (env.stack.length) {
var rec = env.stack.pop();
try {
var result = rec.dispose && rec.dispose.call(rec.value);
if (rec.async) return Promise.resolve(result).then(next, function(e) { fail(e); return next(); });
}
catch (e) {
fail(e);
}
}
if (env.hasError) throw env.error;
}
return next();
};
})(typeof SuppressedError === "function" ? SuppressedError : function (error, suppressed, message) {
var e = new Error(message);
return e.name = "SuppressedError", e.error = error, e.suppressed = suppressed, e;
});
Object.defineProperty(exports, "__esModule", { value: true });
exports.ExecutionContext = void 0;
const CDPSession_js_1 = require("../api/CDPSession.js");
const EventEmitter_js_1 = require("../common/EventEmitter.js");
const LazyArg_js_1 = require("../common/LazyArg.js");
const ScriptInjector_js_1 = require("../common/ScriptInjector.js");
const util_js_1 = require("../common/util.js");
const AsyncIterableUtil_js_1 = require("../util/AsyncIterableUtil.js");
const disposable_js_1 = require("../util/disposable.js");
const Function_js_1 = require("../util/Function.js");
const Mutex_js_1 = require("../util/Mutex.js");
const AriaQueryHandler_js_1 = require("./AriaQueryHandler.js");
const Binding_js_1 = require("./Binding.js");
const ElementHandle_js_1 = require("./ElementHandle.js");
const JSHandle_js_1 = require("./JSHandle.js");
const utils_js_1 = require("./utils.js");
const ariaQuerySelectorBinding = new Binding_js_1.Binding('__ariaQuerySelector', AriaQueryHandler_js_1.ARIAQueryHandler.queryOne, '' // custom init
);
const ariaQuerySelectorAllBinding = new Binding_js_1.Binding('__ariaQuerySelectorAll', (async (element, selector) => {
const results = AriaQueryHandler_js_1.ARIAQueryHandler.queryAll(element, selector);
return await element.realm.evaluateHandle((...elements) => {
return elements;
}, ...(await AsyncIterableUtil_js_1.AsyncIterableUtil.collect(results)));
}), '' // custom init
);
/**
* @internal
*/
class ExecutionContext extends EventEmitter_js_1.EventEmitter {
#client;
#world;
#id;
#name;
#disposables = new disposable_js_1.DisposableStack();
constructor(client, contextPayload, world) {
super();
this.#client = client;
this.#world = world;
this.#id = contextPayload.id;
if (contextPayload.name) {
this.#name = contextPayload.name;
}
const clientEmitter = this.#disposables.use(new EventEmitter_js_1.EventEmitter(this.#client));
clientEmitter.on('Runtime.bindingCalled', this.#onBindingCalled.bind(this));
clientEmitter.on('Runtime.executionContextDestroyed', async (event) => {
if (event.executionContextId === this.#id) {
this[disposable_js_1.disposeSymbol]();
}
});
clientEmitter.on('Runtime.executionContextsCleared', async () => {
this[disposable_js_1.disposeSymbol]();
});
clientEmitter.on('Runtime.consoleAPICalled', this.#onConsoleAPI.bind(this));
clientEmitter.on(CDPSession_js_1.CDPSessionEvent.Disconnected, () => {
this[disposable_js_1.disposeSymbol]();
});
}
// Contains mapping from functions that should be bound to Puppeteer functions.
#bindings = new Map();
// If multiple waitFor are set up asynchronously, we need to wait for the
// first one to set up the binding in the page before running the others.
#mutex = new Mutex_js_1.Mutex();
async #addBinding(binding) {
const env_1 = { stack: [], error: void 0, hasError: false };
try {
if (this.#bindings.has(binding.name)) {
return;
}
const _ = __addDisposableResource(env_1, await this.#mutex.acquire(), false);
try {
await this.#client.send('Runtime.addBinding', this.#name
? {
name: utils_js_1.CDP_BINDING_PREFIX + binding.name,
executionContextName: this.#name,
}
: {
name: utils_js_1.CDP_BINDING_PREFIX + binding.name,
executionContextId: this.#id,
});
await this.evaluate(utils_js_1.addPageBinding, 'internal', binding.name, utils_js_1.CDP_BINDING_PREFIX);
this.#bindings.set(binding.name, binding);
}
catch (error) {
// We could have tried to evaluate in a context which was already
// destroyed. This happens, for example, if the page is navigated while
// we are trying to add the binding
if (error instanceof Error) {
// Destroyed context.
if (error.message.includes('Execution context was destroyed')) {
return;
}
// Missing context.
if (error.message.includes('Cannot find context with specified id')) {
return;
}
}
(0, util_js_1.debugError)(error);
}
}
catch (e_1) {
env_1.error = e_1;
env_1.hasError = true;
}
finally {
__disposeResources(env_1);
}
}
async #onBindingCalled(event) {
if (event.executionContextId !== this.#id) {
return;
}
let payload;
try {
payload = JSON.parse(event.payload);
}
catch {
// The binding was either called by something in the page or it was
// called before our wrapper was initialized.
return;
}
const { type, name, seq, args, isTrivial } = payload;
if (type !== 'internal') {
this.emit('bindingcalled', event);
return;
}
if (!this.#bindings.has(name)) {
this.emit('bindingcalled', event);
return;
}
try {
const binding = this.#bindings.get(name);
await binding?.run(this, seq, args, isTrivial);
}
catch (err) {
(0, util_js_1.debugError)(err);
}
}
get id() {
return this.#id;
}
#onConsoleAPI(event) {
if (event.executionContextId !== this.#id) {
return;
}
this.emit('consoleapicalled', event);
}
#bindingsInstalled = false;
#puppeteerUtil;
get puppeteerUtil() {
let promise = Promise.resolve();
if (!this.#bindingsInstalled) {
promise = Promise.all([
this.#addBindingWithoutThrowing(ariaQuerySelectorBinding),
this.#addBindingWithoutThrowing(ariaQuerySelectorAllBinding),
]);
this.#bindingsInstalled = true;
}
ScriptInjector_js_1.scriptInjector.inject(script => {
if (this.#puppeteerUtil) {
void this.#puppeteerUtil.then(handle => {
void handle.dispose();
});
}
this.#puppeteerUtil = promise.then(() => {
return this.evaluateHandle(script);
});
}, !this.#puppeteerUtil);
return this.#puppeteerUtil;
}
async #addBindingWithoutThrowing(binding) {
try {
await this.#addBinding(binding);
}
catch (err) {
// If the binding cannot be added, then either the browser doesn't support
// bindings (e.g. Firefox) or the context is broken. Either breakage is
// okay, so we ignore the error.
(0, util_js_1.debugError)(err);
}
}
/**
* Evaluates the given function.
*
* @example
*
* ```ts
* const executionContext = await page.mainFrame().executionContext();
* const result = await executionContext.evaluate(() => Promise.resolve(8 * 7))* ;
* console.log(result); // prints "56"
* ```
*
* @example
* A string can also be passed in instead of a function:
*
* ```ts
* console.log(await executionContext.evaluate('1 + 2')); // prints "3"
* ```
*
* @example
* Handles can also be passed as `args`. They resolve to their referenced object:
*
* ```ts
* const oneHandle = await executionContext.evaluateHandle(() => 1);
* const twoHandle = await executionContext.evaluateHandle(() => 2);
* const result = await executionContext.evaluate(
* (a, b) => a + b,
* oneHandle,
* twoHandle
* );
* await oneHandle.dispose();
* await twoHandle.dispose();
* console.log(result); // prints '3'.
* ```
*
* @param pageFunction - The function to evaluate.
* @param args - Additional arguments to pass into the function.
* @returns The result of evaluating the function. If the result is an object,
* a vanilla object containing the serializable properties of the result is
* returned.
*/
async evaluate(pageFunction, ...args) {
return await this.#evaluate(true, pageFunction, ...args);
}
/**
* Evaluates the given function.
*
* Unlike {@link ExecutionContext.evaluate | evaluate}, this method returns a
* handle to the result of the function.
*
* This method may be better suited if the object cannot be serialized (e.g.
* `Map`) and requires further manipulation.
*
* @example
*
* ```ts
* const context = await page.mainFrame().executionContext();
* const handle: JSHandle<typeof globalThis> = await context.evaluateHandle(
* () => Promise.resolve(self)
* );
* ```
*
* @example
* A string can also be passed in instead of a function.
*
* ```ts
* const handle: JSHandle<number> = await context.evaluateHandle('1 + 2');
* ```
*
* @example
* Handles can also be passed as `args`. They resolve to their referenced object:
*
* ```ts
* const bodyHandle: ElementHandle<HTMLBodyElement> =
* await context.evaluateHandle(() => {
* return document.body;
* });
* const stringHandle: JSHandle<string> = await context.evaluateHandle(
* body => body.innerHTML,
* body
* );
* console.log(await stringHandle.jsonValue()); // prints body's innerHTML
* // Always dispose your garbage! :)
* await bodyHandle.dispose();
* await stringHandle.dispose();
* ```
*
* @param pageFunction - The function to evaluate.
* @param args - Additional arguments to pass into the function.
* @returns A {@link JSHandle | handle} to the result of evaluating the
* function. If the result is a `Node`, then this will return an
* {@link ElementHandle | element handle}.
*/
async evaluateHandle(pageFunction, ...args) {
return await this.#evaluate(false, pageFunction, ...args);
}
async #evaluate(returnByValue, pageFunction, ...args) {
const sourceUrlComment = (0, util_js_1.getSourceUrlComment)((0, util_js_1.getSourcePuppeteerURLIfAvailable)(pageFunction)?.toString() ??
util_js_1.PuppeteerURL.INTERNAL_URL);
if ((0, util_js_1.isString)(pageFunction)) {
const contextId = this.#id;
const expression = pageFunction;
const expressionWithSourceUrl = util_js_1.SOURCE_URL_REGEX.test(expression)
? expression
: `${expression}\n${sourceUrlComment}\n`;
const { exceptionDetails, result: remoteObject } = await this.#client
.send('Runtime.evaluate', {
expression: expressionWithSourceUrl,
contextId,
returnByValue,
awaitPromise: true,
userGesture: true,
})
.catch(rewriteError);
if (exceptionDetails) {
throw (0, utils_js_1.createEvaluationError)(exceptionDetails);
}
return returnByValue
? (0, utils_js_1.valueFromRemoteObject)(remoteObject)
: this.#world.createCdpHandle(remoteObject);
}
const functionDeclaration = (0, Function_js_1.stringifyFunction)(pageFunction);
const functionDeclarationWithSourceUrl = util_js_1.SOURCE_URL_REGEX.test(functionDeclaration)
? functionDeclaration
: `${functionDeclaration}\n${sourceUrlComment}\n`;
let callFunctionOnPromise;
try {
callFunctionOnPromise = this.#client.send('Runtime.callFunctionOn', {
functionDeclaration: functionDeclarationWithSourceUrl,
executionContextId: this.#id,
// LazyArgs are used only internally and should not affect the order
// evaluate calls for the public APIs.
arguments: args.some(arg => {
return arg instanceof LazyArg_js_1.LazyArg;
})
? await Promise.all(args.map(arg => {
return convertArgumentAsync(this, arg);
}))
: args.map(arg => {
return convertArgument(this, arg);
}),
returnByValue,
awaitPromise: true,
userGesture: true,
});
}
catch (error) {
if (error instanceof TypeError &&
error.message.startsWith('Converting circular structure to JSON')) {
error.message += ' Recursive objects are not allowed.';
}
throw error;
}
const { exceptionDetails, result: remoteObject } = await callFunctionOnPromise.catch(rewriteError);
if (exceptionDetails) {
throw (0, utils_js_1.createEvaluationError)(exceptionDetails);
}
return returnByValue
? (0, utils_js_1.valueFromRemoteObject)(remoteObject)
: this.#world.createCdpHandle(remoteObject);
async function convertArgumentAsync(context, arg) {
if (arg instanceof LazyArg_js_1.LazyArg) {
arg = await arg.get(context);
}
return convertArgument(context, arg);
}
function convertArgument(context, arg) {
if (typeof arg === 'bigint') {
// eslint-disable-line valid-typeof
return { unserializableValue: `${arg.toString()}n` };
}
if (Object.is(arg, -0)) {
return { unserializableValue: '-0' };
}
if (Object.is(arg, Infinity)) {
return { unserializableValue: 'Infinity' };
}
if (Object.is(arg, -Infinity)) {
return { unserializableValue: '-Infinity' };
}
if (Object.is(arg, NaN)) {
return { unserializableValue: 'NaN' };
}
const objectHandle = arg && (arg instanceof JSHandle_js_1.CdpJSHandle || arg instanceof ElementHandle_js_1.CdpElementHandle)
? arg
: null;
if (objectHandle) {
if (objectHandle.realm !== context.#world) {
throw new Error('JSHandles can be evaluated only in the context they were created!');
}
if (objectHandle.disposed) {
throw new Error('JSHandle is disposed!');
}
if (objectHandle.remoteObject().unserializableValue) {
return {
unserializableValue: objectHandle.remoteObject().unserializableValue,
};
}
if (!objectHandle.remoteObject().objectId) {
return { value: objectHandle.remoteObject().value };
}
return { objectId: objectHandle.remoteObject().objectId };
}
return { value: arg };
}
}
[disposable_js_1.disposeSymbol]() {
this.#disposables.dispose();
this.emit('disposed', undefined);
}
}
exports.ExecutionContext = ExecutionContext;
const rewriteError = (error) => {
if (error.message.includes('Object reference chain is too long')) {
return { result: { type: 'undefined' } };
}
if (error.message.includes("Object couldn't be returned by value")) {
return { result: { type: 'undefined' } };
}
if (error.message.endsWith('Cannot find context with specified id') ||
error.message.endsWith('Inspected target navigated or closed')) {
throw new Error('Execution context was destroyed, most likely because of a navigation.');
}
throw error;
};
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