`choise/index.js` 的代码简单调整一下。

packages/mitmproxy/src/lib/choice/index.js

@@ -25,40 +25,44 @@ class ChoiceCache {
 class DynamicChoice {
   constructor (key) {
     this.key = key
-    this.count = {}
+    this.countMap = {} /* ip -> count { value, total, error, keepErrorCount, successRate }  */
+    this.value = null // 当前使用的host
+    this.backupList = [] // 备选host列表
     this.createTime = new Date()
   }
 
   doRank () {
-    // 将count里面根据权重排序
-    const list = []
-    for (const key in this.count) {
-      list.push(this.count[key])
+    // 将count里面根据成功率排序
+    const countList = []
+    for (const key in this.countMap) {
+      countList.push(this.countMap[key])
     }
-    list.sort((a, b) => {
+
+    // 将countList根据成功率排序
+    countList.sort((a, b) => {
       return b.successRate - a.successRate
     })
-    log.info('do rank', JSON.stringify(list))
-    const backup = list.map(item => item.value)
 
-    this.setBackupList(backup)
+    log.info('Do rank:', JSON.stringify(countList))
+
+    const newBackupList = countList.map(item => item.value)
+    this.setBackupList(newBackupList)
   }
 
   /**
    * 设置新的backup列表
-   * @param backupList
+   * @param newBackupList 新的backupList
    */
-  setBackupList (backupList) {
-    this.backup = backupList
-    let defaultTotal = backupList.length
-    for (const item of backupList) {
-      if (this.count[item]) {
-        continue
+  setBackupList (newBackupList) {
+    this.backupList = newBackupList
+    let defaultTotal = newBackupList.length
+    for (const ip of newBackupList) {
+      if (!this.countMap[ip]) {
+        this.countMap[ip] = { value: ip, total: defaultTotal, error: 0, keepErrorCount: 0, successRate: 0.5 }
+        defaultTotal--
       }
-      this.count[item] = { value: item, total: defaultTotal, error: 0, keepErrorCount: 0, successRate: 0.5 }
-      defaultTotal--
     }
-    this.value = backupList.shift()
+    this.value = newBackupList.shift()
     this.doCount(this.value, false)
   }
 
@@ -67,45 +71,52 @@ class DynamicChoice {
   }
 
   /**
-     * 换下一个
-     * @param count
-     */
+   * 换下一个
+   * @param count 计数器
+   */
   changeNext (count) {
-    log.info('切换backup', count, this.backup)
+    log.info('切换backup', count, this.backupList)
     count.keepErrorCount = 0 // 清空连续失败
     count.total = 0
     count.error = 0
-    if (this.backup.length > 0) {
-      this.value = this.backup.shift()
+
+    const valueBackup = this.value
+    if (this.backupList.length > 0) {
+      this.value = this.backupList.shift()
+      log.info(`切换backup完成: ${this.key}, ip: ${valueBackup} ➜ ${this.value}, this:`, this)
     } else {
       this.value = null
+      log.info(`切换backup完成: ${this.key}, backupList为空了，设置this.value: from '${valueBackup}' to null. this:`, this)
     }
-    log.info('切换backup完成', this.value, this.backup)
   }
 
   /**
-     * 记录使用次数或错误次数
-     * @param value
-     * @param isError
-     */
-  doCount (value, isError) {
-    let count = this.count[value]
+   * 记录使用次数或错误次数
+   * @param ip
+   * @param isError
+   */
+  doCount (ip, isError) {
+    let count = this.countMap[ip]
     if (count == null) {
-      count = this.count[value] = { value: value, total: 5, error: 0, keepErrorCount: 0, successRate: 1 }
+      count = this.countMap[ip] = { value: ip, total: 5, error: 0, keepErrorCount: 0, successRate: 1 }
     }
+
     if (isError) {
+      // 失败次数+1，累计连续失败次数+1
       count.error++
       count.keepErrorCount++
     } else {
-      count.total += 1
+      // 总次数+1
+      count.total++
     }
+    // 计算成功率
     count.successRate = 1.0 - (count.error / count.total)
-    if (isError && this.value === value) {
+    if (isError && this.value === ip) {
       // 连续错误3次，切换下一个
       if (count.keepErrorCount >= 3) {
         this.changeNext(count)
       }
-      // 成功率小于50%,切换下一个
+      // 成功率小于40%,切换下一个
       if (count.successRate < 0.4) {
         this.changeNext(count)
       }

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

@@ -50,7 +50,7 @@ module.exports = function createConnectHandler (sslConnectInterceptor, middlewar
 function connect (req, cltSocket, head, hostname, port, dnsConfig/* , sniRegexpMap */) {
   // tunneling https
   // log.info('connect:', hostname, port)
-  const start = new Date().getTime()
+  const start = new Date()
   let isDnsIntercept = null
   const hostport = `${hostname}:${port}`
   // const replaceSni = matchUtil.matchHostname(sniRegexpMap, hostname, 'sni')
@@ -102,13 +102,13 @@ function connect (req, cltSocket, head, hostname, port, dnsConfig/* , sniRegexpM
       log.error(`cltSocket error:   ${hostport}, errorMsg: ${e.message}`)
     })
     proxySocket.on('timeout', () => {
-      const end = new Date().getTime()
-      log.info('代理socket timeout：', hostname, port, (end - start) + 'ms')
+      const cost = new Date() - start
+      log.info('代理socket timeout：', hostname, port, cost + 'ms')
     })
     proxySocket.on('error', (e) => {
       // 连接失败，可能被GFW拦截，或者服务端拥挤
-      const end = new Date().getTime()
-      log.error('代理连接失败：', e.message, hostname, port, (end - start) + 'ms')
+      const cost = new Date() - start
+      log.error('代理连接失败：', e.message, hostname, port, cost + 'ms')
       cltSocket.destroy()
       if (isDnsIntercept) {
         const { dns, ip, hostname } = isDnsIntercept

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

@@ -109,7 +109,7 @@ module.exports = function createRequestHandler (createIntercepts, middlewares, e
 
         function onFree () {
           const url = `${rOptions.protocol}//${rOptions.hostname}:${rOptions.port}${rOptions.path}`
-          const start = new Date().getTime()
+          const start = new Date()
           log.info('代理请求:', url, rOptions.method, rOptions.servername ? ', sni: ' + rOptions.servername : '')
           let isDnsIntercept
           if (dnsConfig) {
@@ -147,8 +147,7 @@ module.exports = function createRequestHandler (createIntercepts, middlewares, e
           // log.debug('agent:', rOptions.agent)
           // log.debug('agent.options:', rOptions.agent.options)
           proxyReq = (rOptions.protocol === 'https:' ? https : http).request(rOptions, (proxyRes) => {
-            const end = new Date().getTime()
-            const cost = end - start
+            const cost = new Date() - start
             if (rOptions.protocol === 'https:') {
               log.info('代理请求返回:', url, cost + 'ms')
             }
@@ -161,8 +160,7 @@ module.exports = function createRequestHandler (createIntercepts, middlewares, e
 
           // 代理请求的事件监听
           proxyReq.on('timeout', () => {
-            const end = new Date().getTime()
-            const cost = end - start
+            const cost = new Date() - start
             log.error('代理请求超时', rOptions.protocol, rOptions.hostname, rOptions.path, cost + 'ms')
             countSlow(isDnsIntercept, 'to slow  ' + cost + 'ms')
             proxyReq.end()
@@ -172,15 +170,13 @@ module.exports = function createRequestHandler (createIntercepts, middlewares, e
             reject(error)
           })
           proxyReq.on('error', (e) => {
-            const end = new Date().getTime()
-            const cost = end - start
+            const cost = new Date() - start
             log.error('代理请求错误', e.code, e.message, rOptions.hostname, rOptions.path, cost + 'ms')
             countSlow(isDnsIntercept, 'error:' + e.message)
             reject(e)
           })
           proxyReq.on('aborted', () => {
-            const end = new Date().getTime()
-            const cost = end - start
+            const cost = new Date() - start
             log.error('代理请求被取消', rOptions.hostname, rOptions.path, cost + 'ms')
 
             if (cost > MAX_SLOW_TIME) {

packages/mitmproxy/src/lib/proxy/tls/tlsUtils.js

@@ -24,7 +24,7 @@ utils.createCA = function (CN) {
   const cert = pki.createCertificate()
   cert.publicKey = keys.publicKey
   cert.serialNumber = (new Date()).getTime() + ''
-  cert.validity.notBefore = new Date(new Date().getTime() - (60 * 60 * 1000))
+  cert.validity.notBefore = new Date(new Date() - (60 * 60 * 1000))
   cert.validity.notAfter = new Date()
   cert.validity.notAfter.setFullYear(cert.validity.notAfter.getFullYear() + 20)
   const attrs = [{