feat: abort拦截器，允许自定义响应内容

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

@@ -4,20 +4,75 @@ module.exports = {
   requestIntercept (context, interceptOpt, req, res, ssl, next) {
     const { rOptions, log } = context
 
-    res.writeHead(403, {
-      'Content-Type': 'text/plain; charset=utf-8',
-      'DS-Interceptor': 'abort',
-    })
-    res.write(
-      'DevSidecar 403: Request abort.\n\n'
-      + '  This request is matched by abort intercept.\n'
-      + '  因配置abort拦截器，本请求直接返回403禁止访问。',
-    )
-    res.end()
+    if (interceptOpt.abort === true || interceptOpt.abort === 'true') {
+      res.writeHead(403, {
+        'Content-Type': 'text/plain; charset=utf-8',
+        'DS-Interceptor': 'abort',
+      })
+      res.write(
+        'DevSidecar 403: Request abort.\n\n'
+        + '  This request is matched by abort intercept.\n\n'
+        + '  因配置abort拦截器，本请求直接返回403禁止访问。',
+      )
+      res.end()
 
-    const url = `${rOptions.method} ➜ ${rOptions.protocol}//${rOptions.hostname}:${rOptions.port}${req.url}`
-    log.info('abort intercept:', url)
-    return true // true代表请求结束
+      const url = `${rOptions.method} ➜ ${rOptions.protocol}//${rOptions.hostname}:${rOptions.port}${req.url}`
+      log.info('abort intercept:', url)
+      return true // true代表请求结束
+    } else {
+      const response = interceptOpt.abort
+
+      // status
+      const status = response.status || 403
+      response.status = status
+
+      // body
+      const body = response.html || response.json || response.script || response.css || response.text || response.body
+        || `DevSidecar ${status}: Request abort.\n\n`
+        + '  This request is matched by abort intercept.\n\n'
+        + `  因配置abort拦截器，本请求直接返回${status}禁止访问。`
+
+      // headers
+      const headers = response.headers || {}
+      response.headers = headers
+      headers['DS-Interceptor'] = 'abort'
+      // headers.Content-Type
+      if (status !== 204) {
+        // （1）如果没有Content-Type，根据response的内容自动设置
+        if (!headers['Content-Type']) {
+          if (response.html != null) {
+            headers['Content-Type'] = 'text/html'
+          } else if (response.json != null) {
+            headers['Content-Type'] = 'application/json'
+          } else if (response.script != null) {
+            headers['Content-Type'] = 'application/javascript'
+          } else if (response.css != null) {
+            headers['Content-Type'] = 'text/css'
+          } else {
+            headers['Content-Type'] = 'text/plain'
+          }
+        }
+        // （2）如果Content-Type没有charset，自动设置为utf-8
+        if (headers['Content-Type'] != null && !headers['Content-Type'].includes('charset')) {
+          headers['Content-Type'] += '; charset=utf-8'
+        }
+      }
+      // headers.Access-Control-Allow-*：避免跨域问题
+      if (rOptions.headers.origin && !headers['Access-Control-Allow-Origin']) {
+        headers['Access-Control-Allow-Credentials'] = 'true'
+        headers['Access-Control-Allow-Origin'] = rOptions.headers.origin
+      }
+
+      res.writeHead(status, headers)
+      if (status !== 204) {
+        res.write(body)
+      }
+      res.end()
+
+      const url = `${rOptions.method} ➜ ${rOptions.protocol}//${rOptions.hostname}:${rOptions.port}${req.url}`
+      log.info('abort intercept:', url, ', response:', JSON.stringify(response))
+      return true // true代表请求结束
+    }
   },
   is (interceptOpt) {
     return !!interceptOpt.abort