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;
}
};
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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);
}
}
};
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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;
}
};
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为ajax请求增加跨域头
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// rule scheme :
// Ref: https://developer.mozilla.org/en-US/docs/Web/HTTP/Access_control_CORS
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;
}
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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 ;
}
}
};
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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;
}
};
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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 ){
// replace request towards https://www.taobao.com
// to https://www.taobao.com/about/
if( option .hostname == "www.taobao.com" && option .path == "/" ){
option .path = "/about/" ;
}
}
};
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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/*
// to https://www.etao.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" ){
header.location = "https://www.etao.com" ;
}
return header;
}
};
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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) );
}
}
};
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整体结构
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module.exports = {
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
//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;
}
};
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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
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