UnhandledPromiseRejectionWarning:错误:协议错误(Runtime.callFunctionOn)：目标已关闭。(木偶戏演员)
UnhandledPromiseRejectionWarning:错误:协议错误(Runtime.callFunctionOn)：目标已关闭。(木偶戏演员)
提问于 2018-06-01 22:09:39
我是Puppeteer和Node的新手，在尝试执行以下代码时遇到此错误：
'use strict';
const puppeteer = require('puppeteer');
const evalLib = require('./oaa_a11y_evaluation.js');
function evaluateRules() {
var ruleset = OpenAjax.a11y.RulesetManager.getRuleset("ARIA_STRICT");
var evaluator_factory = OpenAjax.a11y.EvaluatorFactory.newInstance();
evaluator_factory.setParameter('ruleset', ruleset);
evaluator_factory.setFeature('eventProcessing', 'fae-util');
evaluator_factory.setFeature('groups', 7);
var evaluator = evaluator_factory.newEvaluator();
var evaluation = evaluator.evaluate(window.document, document.title, document.location.href);
// var out = evaluation.toJSON(true);
return;
}
(async() => {
const browser = await puppeteer.launch();
var page = await browser.newPage();
await page.goto('http://mihirkumar.com/', {waitUntil: 'load'});
page.evaluate(evaluateRules);
await browser.close();
})();以下是完整详细的错误消息：
(node:27876) UnhandledPromiseRejectionWarning: Error: Protocol error (Runtime.callFunctionOn): Target closed.
at Promise (C:\Users\Mihir\fae\node_modules\puppeteer\lib\Connection.js:200:56)
at new Promise (<anonymous>)
at CDPSession.send (C:\Users\Mihir\fae\node_modules\puppeteer\lib\Connection.js:199:12)
at ExecutionContext.evaluateHandle (C:\Users\Mihir\fae\node_modules\puppeteer\lib\ExecutionContext.js:79:75)
at ExecutionContext.evaluate (C:\Users\Mihir\fae\node_modules\puppeteer\lib\ExecutionContext.js:46:31)
at Frame.evaluate (C:\Users\Mihir\fae\node_modules\puppeteer\lib\FrameManager.js:326:20)
at <anonymous>
at process._tickCallback (internal/process/next_tick.js:188:7)
(node:27876) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:27876) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.来自https://github.com/GoogleChromeLabs/puppeteer-examples的其他示例运行得非常好，所以我不认为我需要使用提到的here修复。谢谢你的帮助。
回答 3
Stack Overflow用户
回答已采纳
发布于 2018-06-28 08:20:39
感谢您的回复。使函数异步无疑是一个更好的改变。我的问题是我没有将OpenAjax javascript库注入到加载的页面中。一旦我用木偶人的page.addScriptTag函数做到了这一点，事情就运行得很好了。
Stack Overflow用户
发布于 2018-06-28 05:32:38
正如斯文在评论中提到的，在关闭浏览器之前，您应该在每个返回promise (几乎是所有的)的page函数上使用await。
试试这个：
'use strict';
const puppeteer = require('puppeteer');
const evalLib = require('./oaa_a11y_evaluation.js');
async function evaluateRules() {
var ruleset = OpenAjax.a11y.RulesetManager.getRuleset("ARIA_STRICT");
var evaluator_factory = OpenAjax.a11y.EvaluatorFactory.newInstance();
evaluator_factory.setParameter('ruleset', ruleset);
evaluator_factory.setFeature('eventProcessing', 'fae-util');
evaluator_factory.setFeature('groups', 7);
var evaluator = evaluator_factory.newEvaluator();
var evaluation = evaluator.evaluate(window.document, document.title, document.location.href);
// var out = evaluation.toJSON(true);
return;
}
(async() => {
const browser = await puppeteer.launch();
var page = await browser.newPage();
await page.goto('http://mihirkumar.com/', {waitUntil: 'load'});
await page.evaluate(evaluateRules); // <-- await here
await browser.close();
})();
Stack Overflow用户
发布于 2021-12-07 21:26:01
如果你使用的是jest，只需添加"exitOnPageError: false
module.exports = {
server: {
command: "PORT=3005 BROWSER=none react-scripts start",
port: 3005,
launchTimeout: 30000,
},
launch: {
headless: process.env.HEADLESS !== "false",
devtools: true,
},
exitOnPageError: false
};页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/50645321
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