chrome插件webRequest拦截请求并获取post请求体requestBody数据raw内容,解决中文乱码问题

前端 0

详细使用说明可以看官方文档:https://developer.chrome.com/docs/extensions/reference/api/webRequest?hl=zh-cn

拦截操作 

想要通过浏览器插件拦截请求的话,需要在manifest.json里面添加webRequet权限:

拦截请求代码放在background.js里面:(下面代码解析中文乱码

export {}console.log(    'Live now; make now always the most precious time. Now will never come again.')// 监听发送请求chrome.webRequest.onBeforeRequest.addListener(    function (details) {        console.log('请求详情', details)        if (details.method == 'POST') {            var postedString = decodeURIComponent(                String.fromCharCode.apply(                    null,                    new Uint8Array(details.requestBody.raw[0].bytes)                )            )            console.log('请求体内容', postedString)        }        return { cancel: false }    },    { urls: ['<all_urls>'] },    ['requestBody'])

 拦截到的post请求详情是:

可以看到requestBody内容是raw格式数据: 里面是bytes字节类型

想要看到原始内容,需要解析raw数据:(这种方式会中文乱码

        if (details.method == 'POST') {            var postedString = decodeURIComponent(                String.fromCharCode.apply(                    null,                    new Uint8Array(details.requestBody.raw[0].bytes)                )            )            console.log('请求体内容', postedString)        }

解析后的数据就是明文了: 

解决中文乱码

中文乱码主要出现是因为 String.fromCharCode.apply 引起的。想要解决中文乱码就要换一种解码方式,使用TextDecoder解码就可以了:

            const decoder = new TextDecoder('utf-8')            var postedString = decoder.decode(                new Uint8Array(details?.requestBody?.raw[0].bytes)            )            console.log('请求体内容', postedString)

可以看到中文正常显示了: 

 总的代码在background.js里面:

import { escape } from 'querystring'export {}console.log(    'Live now; make now always the most precious time. Now will never come again.')// 监听发送请求chrome.webRequest.onBeforeRequest.addListener(    function (details) {        console.log('请求详情', details)        if (details.method == 'POST') {            const decoder = new TextDecoder('utf-8')            var postedString = decoder.decode(                new Uint8Array(details?.requestBody?.raw[0].bytes)            )            console.log('请求体内容', postedString)        }        return { cancel: false }    },    { urls: ['<all_urls>'] },    ['requestBody'])

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