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cilame 2021-10-21 20:11:15 +08:00
parent 1d3731a5d8
commit 82dc7a18e6
5 changed files with 47 additions and 7 deletions
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2
background.html
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@ -4,6 +4,8 @@
<title></title>
<meta charset="utf-8">
<script src="./tools/babel_asttool.js"></script>
<script src="./tools/cheerio.js"></script>
<script src="./tools/replacer.js"></script>
<script src="background.js"></script>
</head>
<body>

22
background.js
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@ -32,13 +32,23 @@ chrome.debugger.onEvent.addListener(function (source, method, params){
sendCommand("Fetch.failRequest", { requestId: params.requestId, errorReason: params.responseErrorReason }, source);
break; }
sendCommand("Fetch.getResponseBody", { requestId: params.requestId }, source, function(result){
var fillfunc = fillresponse.bind(null, params, source)
if (result.body !== undefined){ // 收到的 result.body 是 base64(代码) 的代码，使用时需要解码一下
chrome.storage.local.get(["config-fetch_hook"], function (res) {
try{ fillresponse.bind(null, params, source)(btoa(eval((res["config-fetch_hook"]||'')+';fetch_hook')(atob(result.body), params.resourceType, params.request.url))) }
catch(e){ fillresponse.bind(null, params, source)(result.body) }
try{
var respboby = atob(result.body)
var replacer = eval((res["config-fetch_hook"]||'')+';fetch_hook')
if (params.resourceType == 'Script'){ var replbody = btoa(replacer(respboby, params.request.url)) }
if (params.resourceType == 'Document'){ var replbody = btoa(html_script_replacer(respboby, replacer, params.request.url)) }
fillfunc(replbody)
}
catch(e){
// hook 修改失败，将错误信息传入前端，直接在前端反馈错误信息
fillfunc(result.body)
}
})
return }
fillresponse.bind(null, params, source)(result.body) // body 只能传 base64(指定代码)
fillfunc(result.body) // body 只能传 base64(指定代码)
});
break; }
}
@ -53,11 +63,11 @@ function AttachDebugger() {
function (tabs) {
var currtab = { tabId: tabs[0].id };
chrome.debugger.attach(currtab, "1.2", function () {
// Document, Stylesheet, Image, Media, Font, Script, TextTrack, XHR, Fetch, EventSource, WebSocket, Manifest, SignedExchange, Ping, CSPViolationReport, Preflight, Other
sendCommand("Network.enable", {}, currtab, function(){ sendCommand("Network.setCacheDisabled", {cacheDisabled: true}, currtab)} ) // 确保 Fetch.getResponseBody 一定能收到东西
sendCommand("Fetch.enable", { patterns: [
{urlPattern:"*",resourceType:"Script",requestStage:"Response"}, // 暂时先只 hook Script 类型的脚本
// {urlPattern:"*",resourceType:"Document",requestStage:"Response"},
// Document, Stylesheet, Image, Media, Font, Script, TextTrack, XHR, Fetch, EventSource, WebSocket, Manifest, SignedExchange, Ping, CSPViolationReport, Preflight, Other
{urlPattern:"*",resourceType:"Script",requestStage:"Response"}, // 暂时先只 hook 少量携带 js 数据类型的请求
{urlPattern:"*",resourceType:"Document",requestStage:"Response"},
] }, currtab);
});
}

2
options.html
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@ -115,7 +115,7 @@
<div>能直接用插件的方式实现 ast 修改代码，用处还是非常大的。</div>
<HR>
<div>
请定义一个名字为 fetch_hook 函数，接受参数为 1.代码 2.类型 3.url，return 修改后的代码
请定义一个名字为 fetch_hook 函数，接受参数为 1.代码 2.url，return 修改后的代码
</div>
<textarea id='fetch_hook' data-key="config-fetch_hook" style="width: 100%; height: 500px"></textarea>
</section>

1
tools/cheerio.js Normal file
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File diff suppressed because one or more lines are too long

27
tools/replacer.js Normal file
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@ -0,0 +1,27 @@
function html_script_replacer(body, replacer, url){
var html = cheerio.load(body)
var scripts = html("script");
if (!scripts.length){
return
}
for (var i = 0; i < scripts.length; i++) {
var script = scripts[i]
if (script.attribs.src){
continue
}
if (!script.children.length){
continue
}
var jscode = ''
for (var i = 0; i < script.children.length; i++) {
jscode += script.children[i].data
}
if (!jscode){
return
}
var newscript = cheerio.load("<script>" + replacer(jscode, url) + "</script>")("script");
newscript.attribs = script.attribs;
html(script).replaceWith(newscript);
}
return html.html()
}