bugfix: 修复因 `HttpsAgent` 为单例，导致并发请求时因启用了SSL校验导致 proxy 或 sni 请求失败的问题

packages/mitmproxy/src/lib/interceptor/impl/req/proxy.js

@@ -116,12 +116,16 @@ module.exports = {
     }
 
     if (interceptOpt.sni != null) {
+      let unVerifySsl = rOptions.agent.options.rejectUnauthorized === false
+
       rOptions.servername = interceptOpt.sni
-      if (rOptions.agent && rOptions.agent.options) {
-        rOptions.agent.options.rejectUnauthorized = false
+      if (rOptions.agent.options.rejectUnauthorized && rOptions.agent.unVerifySslAgent) {
+        // rOptions.agent.options.rejectUnauthorized = false // 不能直接在agent上进行修改属性值，因为它采用了单例模式，所有请求共用这个对象的
+        rOptions.agent = rOptions.agent.unVerifySslAgent
+        unVerifySsl = true
       }
-      res.setHeader('DS-Interceptor', `proxy: ${proxyTarget}, sni: ${interceptOpt.sni}`)
-      log.info('proxy intercept: hostname:', originHostname, ', target：', proxyTarget, ', sni replace servername:', rOptions.servername)
+      res.setHeader('DS-Interceptor', `proxy: ${proxyTarget}, sni: ${interceptOpt.sni}`, (unVerifySsl ? ', unVerifySsl' : ''))
+      log.info('proxy intercept: hostname:', originHostname, ', target：', proxyTarget, ', sni replace servername:', rOptions.servername, (unVerifySsl ? ', unVerifySsl' : ''))
     } else {
       res.setHeader('DS-Interceptor', `proxy: ${proxyTarget}`)
       log.info('proxy intercept: hostname:', originHostname, ', target：', proxyTarget)

packages/mitmproxy/src/lib/interceptor/impl/req/sni.js

@@ -4,14 +4,17 @@ module.exports = {
   requestIntercept (context, interceptOpt, req, res, ssl, next) {
     const { rOptions, log } = context
 
+    let unVerifySsl = rOptions.agent.options.rejectUnauthorized === false
+
     rOptions.servername = interceptOpt.sni
-    if (rOptions.agent && rOptions.agent.options) {
-      rOptions.agent.options.rejectUnauthorized = false
+    if (rOptions.agent.options.rejectUnauthorized && rOptions.agent.unVerifySslAgent) {
+      // rOptions.agent.options.rejectUnauthorized = false // 不能直接在agent上进行修改属性值，因为它采用了单例模式，所有请求共用这个对象的
+      rOptions.agent = rOptions.agent.unVerifySslAgent
+      unVerifySsl = true
     }
+    res.setHeader('DS-Interceptor', `sni: ${interceptOpt.sni}`, (unVerifySsl ? ', unVerifySsl' : ''))
 
-    res.setHeader('DS-Interceptor', 'sni: ' + interceptOpt.sni)
-
-    log.info('sni intercept: sni replace servername:', rOptions.hostname, '➜', rOptions.servername)
+    log.info('sni intercept: sni replace servername:', rOptions.hostname, '➜', rOptions.servername, (unVerifySsl ? ', unVerifySsl' : ''))
     return true
   },
   is (interceptOpt) {

packages/mitmproxy/src/lib/proxy/common/util.js

@@ -24,15 +24,27 @@ function getTimeoutConfig (hostname, serverSetting) {
   }
 }
 
-function createHttpsAgent (timeoutConfig) {
+function createHttpsAgent (timeoutConfig, verifySsl) {
   const key = timeoutConfig.timeout + '-' + timeoutConfig.keepAliveTimeout
   if (!httpsAgentCache[key]) {
-    httpsAgentCache[key] = new HttpsAgent({
+    verifySsl = !!verifySsl
+
+    const agent = new HttpsAgent({
+      keepAlive: true,
+      timeout: timeoutConfig.timeout,
+      keepAliveTimeout: timeoutConfig.keepAliveTimeout,
+      rejectUnauthorized: verifySsl
+    })
+
+    agent.unVerifySslAgent = new HttpsAgent({
       keepAlive: true,
       timeout: timeoutConfig.timeout,
       keepAliveTimeout: timeoutConfig.keepAliveTimeout,
       rejectUnauthorized: false
     })
+
+    httpsAgentCache[key] = agent
+    log.info('创建 HttpsAgent 成功, timeoutConfig:', timeoutConfig, ', verifySsl:', verifySsl)
   }
   return httpsAgentCache[key]
 }
@@ -45,13 +57,14 @@ function createHttpAgent (timeoutConfig) {
       timeout: timeoutConfig.timeout,
       keepAliveTimeout: timeoutConfig.keepAliveTimeout
     })
+    log.info('创建 HttpsAgent 成功, timeoutConfig:', timeoutConfig)
   }
   return httpAgentCache[key]
 }
 
-function createAgent (protocol, timeoutConfig) {
+function createAgent (protocol, timeoutConfig, verifySsl) {
   return protocol === 'https:'
-    ? createHttpsAgent(timeoutConfig)
+    ? createHttpsAgent(timeoutConfig, verifySsl)
     : createHttpAgent(timeoutConfig)
 }
 
@@ -110,7 +123,7 @@ util.getOptionsFromRequest = (req, ssl, externalProxy = null, serverSetting) =>
     if (headers.connection !== 'close') {
       const timeoutConfig = getTimeoutConfig(hostname, serverSetting)
       // log.info(`get timeoutConfig '${hostname}':`, timeoutConfig)
-      agent = createAgent(protocol, timeoutConfig)
+      agent = createAgent(protocol, timeoutConfig, serverSetting.verifySsl)
       headers.connection = 'keep-alive'
     } else {
       agent = false

packages/mitmproxy/src/lib/proxy/mitmproxy/createRequestHandler.js

@@ -18,12 +18,6 @@ module.exports = function createRequestHandler (createIntercepts, middlewares, e
     const rOptions = commonUtil.getOptionsFromRequest(req, ssl, externalProxy, setting)
     let url = `${rOptions.method} ➜ ${rOptions.protocol}//${rOptions.hostname}:${rOptions.port}${rOptions.path}`
 
-    if (rOptions.agent) {
-      rOptions.agent.options.rejectUnauthorized = setting.verifySsl
-    } else if (rOptions.agent !== false) {
-      log.error('rOptions.agent 的值有问题:', rOptions)
-    }
-
     if (rOptions.headers.connection === 'close') {
       req.socket.setKeepAlive(false)
     } else if (rOptions.customSocketId != null) { // for NTLM