bugfix: OPTIONS 拦截器，在正式请求中缺少响应头 `'Access-Control-Allow-Credentials': 'true'` 的问题修复。

packages/mitmproxy/src/lib/interceptor/impl/res/AfterOPTIONSHeaders.js

@@ -1,24 +1,28 @@
 const responseReplaceApi = require('./responseReplace')
 
 module.exports = {
-  name: 'OPTIONSHeaders',
+  name: 'AfterOPTIONSHeaders',
   desc: '开启了options.js功能时，正常请求时，会需要增加响应头 `Access-Control-Allow-Origin: xxx`',
   priority: 201,
   responseIntercept (context, interceptOpt, req, res, proxyReq, proxyRes, ssl, next) {
     const { rOptions, log } = context
 
-    if (rOptions.method === 'OPTIONS') {
+    if (rOptions.method === 'OPTIONS' || rOptions.headers.origin == null) {
       return
     }
 
     const headers = {
+      'Access-Control-Allow-Credentials': 'true',
       'Access-Control-Allow-Origin': rOptions.headers.origin,
     }
 
+    res.setHeader('DS-AfterOPTIONSHeaders-Interceptor', '1')
+
     // 替换响应头
     if (responseReplaceApi.replaceResponseHeaders({ ...headers }, res, proxyRes)) {
-      res.setHeader('DS-AfterOPTIONSHeaders-Interceptor', rOptions.headers.origin)
       log.info('AfterOPTIONSHeaders intercept:', JSON.stringify(headers))
+    } else {
+      res.setHeader('DS-AfterOPTIONSHeaders-Interceptor', '0')
     }
   },
   is (interceptOpt) {

packages/mitmproxy/src/lib/interceptor/impl/res/responseReplace.js

@@ -5,7 +5,10 @@ const REMOVE = '[remove]'
 
 // 替换响应头
 function replaceResponseHeaders (newHeaders, res, proxyRes) {
-  if (newHeaders && !lodash.isEmpty(newHeaders)) {
+  if (!newHeaders || lodash.isEmpty(newHeaders)) {
+    return null
+  }
+
   // 响应头Key统一转小写
   for (const headerKey in newHeaders) {
     if (headerKey === headerKey.toLowerCase()) {
@@ -58,9 +61,6 @@ function replaceResponseHeaders (newHeaders, res, proxyRes) {
   }
   // 返回原先响应头
   return preHeaders
-  }
-
-  return null
 }
 
 module.exports = {

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

@@ -15,7 +15,7 @@ const unVerifySsl = require('./impl/req/unVerifySsl')
 const baiduOcr = require('./impl/req/baiduOcr')
 
 // response interceptor impls
-const OPTIONSHeaders = require('./impl/res/AfterOPTIONSHeaders')
+const AfterOPTIONSHeaders = require('./impl/res/AfterOPTIONSHeaders')
 const cacheRes = require('./impl/res/cacheRes')
 const responseReplace = require('./impl/res/responseReplace')
 
@@ -30,6 +30,6 @@ module.exports = [
   baiduOcr,
 
   // response interceptor impls
-  OPTIONSHeaders, cacheRes, responseReplace,
+  AfterOPTIONSHeaders, cacheRes, responseReplace,
   script,
 ]

packages/mitmproxy/test/lib/interceptor/impl/res/responseReplaceTest.js

@@ -13,8 +13,8 @@ const proxyRes = {
     'Content-Length', '2',
     'ETag', 'W/"2"',
     'Date', 'Thu, 01 Jan 1970 00:00:00 GMT',
-    'Connection', 'keep-alive'
-  ]
+    'Connection', 'keep-alive',
+  ],
 }
 
 const newHeaders = {