可以高度定制的代理服务器anyproxy
简介
anyproxy是一款可以高度定制的代理服务器,基于nodejs。
特征
支持https明文代理 支持低网速模拟 支持二次开发,可以用javascript控制代理的全部流程,搭建前端个性化调试环境 提供web版界面,观测请求情况
设计
anyproxy把http通信过程中的各个阶段进行抽离,分解成三个阶段:
收到来自客户端请求之后,允许开发者直接从本地提供返回 在转发请求到服务器前,允许开发者对发送的请求进行修改 在收到服务器响应之后,允许开发者对响应内容进行修改,再返回给客户端
对于上述每个阶段,anyproxy都提供了API接口,引入开发者编写自己的规则代码,实时干预通信过程,以此满足各类自定义需求。
具体地,我们提供的接口包括:
收到用户请求之后
shouldUseLocalResponse ,是否在本地直接发送响应(不再向服务器发出请求) dealLocalResponse 如果shouldUseLocalResponse返回true,会调用这个函数来获取本地响应内容(异步接口) 向服务端发出请求之前
replaceRequestProtocol 替换向服务器发出的请求协议,支持http和https的替换 replaceRequestOption 替换向服务器发出的请求参数,即nodeJS中的 request option replaceRequestData 替换请求的body 向用户返回服务端的响应之前
replaceResponseStatusCode 替换服务器响应的http状态码 replaceResponseHeader 替换服务器响应的http头 replaceServerResDataAsync 替换服务器响应的数据(异步接口) pauseBeforeSendingResponse 在请求返回给用户前的延迟时间
快速开始
安装
安装Nodejs npm install -g anyproxy,有可能需要sudo python可选安装
启动
默认启动anyproxy 定制启动端口anyproxy --port 8001 使用某个规则文件anyproxy --rule ./rule_sample/rule_allow_CORS.js 代理https请求anyproxy --intercept(需要安装证书,详情见下文) 其他命令可以通过anyproxy -h查看
加载网页界面
访问https://127.0.0.1:8002,你会在浏览器里看到实时的请求。 要确保是现代浏览器
HTTPS相关教程
生成RootCA
命令行执行 sudo anyproxy –root 找到RootCA文件
方法一: 执行完成之后,会打开证书的安装路径,即可看到 rootCA.crt 文件 方法二: 启动anyproxy,浏览器打开 https://localhost:8002/fetchCrtFile ,也能获取rootCA.crt文件 方法三:启动anyproxy,https://localhost:8002/qr_root 可以获取证书路径的二维码,移动端安装时会比较便捷 打开上述rootCA.crt文件 根据操作系统提示,信任rootCA
其他
如果在访问时出现UNAUTHORIZED_CERTIFICATE一类的安全警告,请重新检查证书的安装情况 证书只需生成一次,使用前每个终端都需要信任它
明文解析HTTPS
需要解析HTTPS时,用intercept参数来启动anyproxy anyproxy --intercept 为终端设置代理,在UI界面就能看到明文的HTTPS请求数据了,带把小锁的就是HTTPS请求
进阶 - 用rule来手动处理https请求(如:代理文件到本地)
AnyProxy默认不会解析https请求,你需要引入shouldInterceptHttpsReq这个函数来显式指定解析哪个请求。具体可以参照这份sample : rule_intercept_some_https_requests.js
其他
anyproxy --clear可以清除所有已生成的证书。清除后,各终端需要重新安装证书。 日常开发中,不要使用anyproxy --type https来调试。AnyProxy使用https over http的方法来进行代理,而这条命令启动的是一个https代理服务器,两者使用场景完全不同。
AnyProxy规则文件样例
修改请求头:防止CDN返回304
以“防止CDN返回304”这个需求为例,最直接的方案是拦截请求,在发送到CDN前删除header中的if-modified-since字段。在AnyProxy中,配置replaceRequestOption接口,3行代码就能实现这个自定义功能:
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// rule file module.exports = { //在向服务器发出请求前,AnyProxy会调用这个接口,可以在此时修改发送请求的参数 replaceRequestOption : function (req, option ){ var newOption = option ; delete newOption.headers[ 'if-modified-since' ]; return newOption; } }; |
修改响应数据
再举个例子,如果你想修改响应数据,在所有html文件最后加个”Hello World”,就需要调用replaceServerResDataAsync接口,并结合content-type字段来进行修改,大约需要8行代码。
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// rule file module.exports = { replaceServerResDataAsync: function (req,res,serverResData,callback){ //append "hello world" to all web pages if(/html/i.test(res.headers[ 'content-type' ])){ var newDataStr = serverResData.toString(); newDataStr += "hello world!" ; callback(newDataStr); } else { callback(serverResData); } } }; |
把所有的响应延迟1500毫秒
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module.exports = { pauseBeforeSendingResponse : function (req,res){ //delay all the response for 1500ms return 1500; } }; |
为ajax请求增加跨域头
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// rule scheme : module.exports = { shouldUseLocalResponse : function (req,reqBody){ //intercept all options request if(req.method == "OPTIONS" ){ return true ; } else { return false ; } }, dealLocalResponse : function (req,reqBody,callback){ if(req.method == "OPTIONS" ){ callback(200,mergeCORSHeader(req.headers), "" ); } }, replaceResponseHeader: function (req,res,header){ return mergeCORSHeader(req.headers, header); } }; function mergeCORSHeader(reqHeader,originHeader){ var targetObj = originHeader || {}; delete targetObj[ "Access-Control-Allow-Credentials" ]; delete targetObj[ "Access-Control-Allow-Origin" ]; delete targetObj[ "Access-Control-Allow-Methods" ]; delete targetObj[ "Access-Control-Allow-Headers" ]; targetObj[ "access-control-allow-credentials" ] = "true" ; targetObj[ "access-control-allow-origin" ] = reqHeader[ 'origin' ] || "-___-||" ; targetObj[ "access-control-allow-methods" ] = "GET, POST, PUT" ; targetObj[ "access-control-allow-headers" ] = reqHeader[ 'access-control-request-headers' ] || "-___-||" ; return targetObj; } |
截获github.com的https请求,再在最后加点文字
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module.exports = { replaceServerResDataAsync: function (req,res,serverResData,callback){ // add "hello github" to all github pages if(req.headers.host == "github.com" ){ serverResData += "hello github" ; } callback(serverResData); }, shouldInterceptHttpsReq : function (req){ //intercept https://github.com/ //otherwise, all the https traffic will not go through this proxy // return true ; if(req.headers.host == "github.com" ){ return true ; } else { return false ; } } }; |
去除响应头里缓存相关的头
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// rule scheme : module.exports = { replaceRequestOption : function (req, option ){ var newOption = option ; delete newOption.headers[ 'if-none-match' ]; delete newOption.headers[ 'if-modified-since' ]; return newOption; }, replaceResponseHeader: function (req,res,header){ header = header || {}; header[ "Cache-Control" ] = "no-cache, no-store, must-revalidate" ; header[ "Pragma" ] = "no-cache" ; header[ "Expires" ] = 0; return header; } }; |
在请求发送到服务端前对参数做一些调整
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module.exports = { replaceRequestOption : function (req, option ){ /* option scheme: { hostname : "www.taobao.com" port : 80 path : "/" method : "GET" headers : {cookie:""} } */ if( option .hostname == "www.taobao.com" && option .path == "/" ){ option .path = "/about/" ; } } }; |
改变服务端响应的http状态码
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module.exports = { replaceResponseStatusCode: function (req,res,statusCode){ //redirect requests toward https://www.taobao.com/* //using 302 if(req.headers.host == "www.taobao.com" ){ statusCode = 302; } return statusCode; }, replaceResponseHeader: function (req,res,header){ if(req.headers.host == "www.taobao.com" ){ } return header; } }; |
把响应映射到本地
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// replace all the images with local one var fs = require( "fs" ); var LOCAL_IMAGE = "/Users/path/to/image.png" ; module.exports = { summary: function (){ return "replace all the images with local one" ; }, //mark if use local response shouldUseLocalResponse : function (req,reqBody){ if(/\.(png|gif|jpg|jpeg)$/.test(req.url)){ req.replaceLocalFile = true ; return true ; } else { return false ; } }, dealLocalResponse : function (req,reqBody,callback){ if(req.replaceLocalFile){ callback(200, { "content-type" : "image/png" }, fs.readFileSync(LOCAL_IMAGE) ); } } }; |
整体结构
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/* read the following wiki before using rule file */ module.exports = { /* These functions will overwrite the default ones, write your own when necessary. Comments in Chinese are nothing but a translation of key points. Be relax if you dont understand. 致中文用户:中文注释都是只摘要,必要时请参阅英文文档。欢迎提出修改建议。 */ summary: function (){ return "this is a blank rule for AnyProxy" ; }, //======================= // when getting a request from user //收到用户请求之后 //======================= //是否截获https请求 //should intercept https request, or it will be forwarded to real server shouldInterceptHttpsReq : function (req){ return false ; }, //是否在本地直接发送响应(不再向服务器发出请求) //whether to intercept this request by local logic //if the return value is true , anyproxy will call dealLocalResponse to get response data and will not send request to remote server anymore //req is the user 's request sent to the proxy server shouldUseLocalResponse : function(req,reqBody){ return false; }, //如果shouldUseLocalResponse返回true,会调用这个函数来获取本地响应内容 //you may deal the response locally instead of sending it to server //this function be called when shouldUseLocalResponse returns true //callback(statusCode,resHeader,responseData) //e.g. callback(200,{"content-type":"text/html"},"hello world") dealLocalResponse : function(req,reqBody,callback){ callback(statusCode,resHeader,responseData) }, //======================= //when ready to send a request to server //向服务端发出请求之前 //======================= //替换向服务器发出的请求协议(http和https的替换) //replace the request protocol when sending to the real server //protocol : "http" or "https" replaceRequestProtocol:function(req,protocol){ var newProtocol = protocol; return newProtocol; }, //替换向服务器发出的请求参数(option) //option is the configuration of the http request sent to remote server. You may refers to https://nodejs.org/api/http.html#http_http_request_options_callback //you may return a customized option to replace the original one //you should not overwrite content-length header in options, since anyproxy will handle it for you replaceRequestOption : function(req,option){ var newOption = option; return newOption; }, //替换请求的body //replace the request body replaceRequestData: function(req,data){ return data; }, //======================= //when ready to send the response to user after receiving response from server //向用户返回服务端的响应之前 //======================= //替换服务器响应的http状态码 //replace the statusCode before it' s sent to the user replaceResponseStatusCode: function (req,res,statusCode){ var newStatusCode = statusCode; return newStatusCode; }, //替换服务器响应的http头 // replace the httpHeader before it 's sent to the user //Here header == res.headers replaceResponseHeader: function(req,res,header){ var newHeader = header; return newHeader; }, //替换服务器响应的数据 //replace the response from the server before it' s sent to the user //you may return either a Buffer or a string //serverResData is a Buffer. for those non-unicode reponse , serverResData.toString() should not be your first choice. replaceServerResDataAsync: function (req,res,serverResData,callback){ callback(serverResData); }, //Deprecated // replaceServerResData: function (req,res,serverResData){ // return serverResData; // }, //在请求返回给用户前的延迟时间 // add a pause before sending response to user pauseBeforeSendingResponse : function (req,res){ var timeInMS = 1; //delay all requests for 1ms return timeInMS; } }; |
AnyProxy其他特性
支持Https的中间人(man-in-the-middle)代理,同时提供便捷的根证书安装路径,方便移动端导入证书 低网速网速模拟,协助调试2G/3G下的表现 可以导出所有请求记录,供后期数据分析使用 可以进行模块化调用,做二次封装,合并到现有的前端集成开发环境中,个性化搭建自己的调试环境
文档和支持
HTTPS相关配置的中文文档
What is rule file and how to write one
代理服务器的新轮子:anyproxy
转载:https://www.2cto.com/kf/201707/654139.html