puppeteer 拦截页面请求
Posted ajanuw
tags:
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page.setRequestInterception(true) 开启拦截
req.respond() 返回一个自定义响应
req.continue() 继续请求
注意:
- 监听的请求的类型有： document，stylesheet，image，media，font，script，texttrack，xhr，fetch，eventsource，websocket，manifest，other
- 拦截请求需要开启 await page.setRequestInterception(true);
- await req.respond()和await req.continue() 不能同时调用
- 使用await req.respond() 拦截返回值注意跨域
- 使用await req.respond() 拦截返回值注意返回json或字符串
main.js
const pptr = require('puppeteer');
async function bootstrap() {
const browser = await pptr.launch({
headless: false,
slowMo: 250,
});
const page = await browser.newPage();
page.on('console', m => {
// console.log(m.text());
});
await page.setRequestInterception(true);
page.on('request', async req => {
if (req.resourceType() === 'xhr') {
console.log(req.url());
await req.respond({
status: 200,
headers: {
'Access-Control-Allow-Origin': '*',
},
contentType: 'application/json; charset=utf-8',
body: JSON.stringify({ code: 0, data: 'hello puppeteer' }),
});
// await req.continue();
} else {
await req.continue();
}
});
page.on('response', async res => {
if (res.url().indexOf('/header') >= 0) {
console.log(res.status());
// 原本接口返回的数据 {"code":0,"data":"hello ajanuw"}
console.log(await res.text());
// await browser.close();
}
});
page.on('requestfinished', req => {
console.log(`请求完成: ${req.url()}`);
});
page.on('requestfailed', req => {
console.log(`请求失败: ${req.url()}`);
});
await page.goto('http://127.0.0.1:5500/index.html');
}
bootstrap();index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>Document</title>
</head>
<body>
<div id="app">
<button @click="get()">click get</button>
<p>{{ data | json }}</p>
</div>
<script src="https://unpkg.com/[email protected]/dist/vue.min.js"></script>
<script src="https://unpkg.com/[email protected]/dist/axios.min.js"></script>
<script>
const http = axios.create({
baseURL: 'http://127.0.0.1:5000',
});
new Vue({
el: '#app',
data() {
return {
data: ''
};
},
methods: {
get() {
http('/header').then(({ data }) => {
console.log(typeof data.data);
this.data = data
});
},
},
mounted() {},
});
</script>
</body>
</html>接口
@Get('/header')
@Header('Access-Control-Allow-Origin', '*')
test() {
return {
code: 0,
data: 'hello ajanuw',
};
}以上是关于puppeteer 拦截页面请求的主要内容，如果未能解决你的问题，请参考以下文章
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