65 lines
1.9 KiB
JavaScript
65 lines
1.9 KiB
JavaScript
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const {helper, assert, debugError} = require('./helper');
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const {JSHandle, createHandle} = require('./JSHandle');
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class ExecutionContext {
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/**
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* @param {!PageSession} session
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* @param {?Frame} frame
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* @param {string} executionContextId
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*/
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constructor(session, frame, executionContextId) {
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this._session = session;
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this._frame = frame;
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this._executionContextId = executionContextId;
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}
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async evaluateHandle(pageFunction, ...args) {
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if (helper.isString(pageFunction)) {
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const payload = await this._session.send('Page.evaluate', {
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script: pageFunction,
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executionContextId: this._executionContextId,
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});
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return createHandle(this, payload.result, payload.exceptionDetails);
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}
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args = args.map(arg => {
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if (arg instanceof JSHandle)
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return arg._protocolValue;
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if (Object.is(arg, Infinity))
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return {unserializableValue: 'Infinity'};
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if (Object.is(arg, -Infinity))
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return {unserializableValue: '-Infinity'};
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if (Object.is(arg, -0))
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return {unserializableValue: '-0'};
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if (Object.is(arg, NaN))
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return {unserializableValue: 'NaN'};
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return {value: arg};
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});
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const payload = await this._session.send('Page.evaluate', {
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functionText: pageFunction.toString(),
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args,
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executionContextId: this._executionContextId
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});
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return createHandle(this, payload.result, payload.exceptionDetails);
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}
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frame() {
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return this._frame;
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}
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async evaluate(pageFunction, ...args) {
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try {
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const handle = await this.evaluateHandle(pageFunction, ...args);
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const result = await handle.jsonValue();
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await handle.dispose();
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return result;
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} catch (e) {
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if (e.message.includes('cyclic object value') || e.message.includes('Object is not serializable'))
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return undefined;
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throw e;
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}
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}
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}
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module.exports = {ExecutionContext};
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