UnhandledPromiseRejectionWarning: Error: Protocol error (Runtime.callFunctionOn): Target closed. (Puppeteer)
UnhandledPromiseRejectionWarning: Error: Protocol error (Runtime.callFunctionOn): Target closed. (Puppeteer)
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();
})();
下面是详细的错误消息:
(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.
https://github.com/GoogleChromeLabs/puppeteer-examples run perfectly fine so I don't believe I need to use the fixes mentioned here 中的其他示例。感谢您的帮助。
正如 Sven 在评论中提到的那样,您应该在每个 page
函数上使用 await
returns 在关闭浏览器之前承诺(几乎所有这些)。
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();
})();
感谢您的回复。使函数异步绝对是一个更好的改变。我的问题是我没有将 OpenAjax javascript 库注入加载的页面。一旦我用 puppeteer 的 page.addScriptTag 函数做到了这一点,事情就很好了。
如果您使用的是开玩笑,只需在
上添加“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
};
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();
})();
下面是详细的错误消息:
(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.
https://github.com/GoogleChromeLabs/puppeteer-examples run perfectly fine so I don't believe I need to use the fixes mentioned here 中的其他示例。感谢您的帮助。
正如 Sven 在评论中提到的那样,您应该在每个 page
函数上使用 await
returns 在关闭浏览器之前承诺(几乎所有这些)。
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();
})();
感谢您的回复。使函数异步绝对是一个更好的改变。我的问题是我没有将 OpenAjax javascript 库注入加载的页面。一旦我用 puppeteer 的 page.addScriptTag 函数做到了这一点,事情就很好了。
如果您使用的是开玩笑,只需在
上添加“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
};