Drop Node version < 8

After more testing the 'async-hooks' polyfill shown to not work properly
for Node version prior to 8.

Author: Danilo Resende

.travis.yml

@@ -1,7 +1,6 @@
 language: node_js
 node_js:
-  - "4"
-  - "5"
+  - "8"
   - "stable"
 
 sudo: required

lib/async-context.js

@@ -0,0 +1,28 @@
+'use strict';
+
+const asyncHooks = require('async_hooks');
+
+class AsyncContext {
+  constructor() {
+    this.map = new Map();
+    asyncHooks.createHook({
+      init: (id, _type, triggerId) => {
+        if (this.map.has(triggerId))
+          this.map.set(id, this.map.get(triggerId));
+      },
+      destroy: (id) => this.map.delete(id)
+    }).enable();
+  }
+
+  get() {
+    const id = asyncHooks.executionAsyncId();
+    if (this.map.has(id))
+      return this.map.get(id);
+  }
+
+  set(val) {
+    this.map.set(asyncHooks.executionAsyncId(), val);
+  }
+}
+
+module.exports = new AsyncContext();

lib/middlewares/express.js

@@ -1,16 +1,21 @@
 'use strict';
 
+const asyncContext = require('../async-context');
+
 module.exports = {
   buildMiddleware: function(provider) {
     return function(req, res, next) {
       provider.handler(req, res, next);
     };
   },
-  mainMiddleware: function(enable, authorize, handleRequest) {
+  mainMiddleware: function(enable, authorize, handleRequest, cls) {
     return function(req, res, next) {
       handleRequest(enable, authorize, req, res).then((handled) => {
         res.locals.miniprofiler = req.miniprofiler;
 
+        asyncContext.set(req.miniprofiler);
+        Object.defineProperty(req, 'miniprofiler', { get: () => asyncContext.get() });
+
         var render = res.render;
         res.render = function() {
           var renderArguments = arguments;
@@ -24,4 +29,4 @@ module.exports = {
       }).catch(next);
     };
   }
-};
+};

lib/middlewares/hapi.js

@@ -1,5 +1,7 @@
 'use strict';
 
+const asyncContext = require('../async-context');
+
 module.exports = {
   buildMiddleware: function(provider) {
     var plugin = {
@@ -25,7 +27,9 @@ module.exports = {
       register: (server, options, next) => {
         server.ext('onRequest', function(request, reply) {
           handleRequest(enable, authorize, request.raw.req, request.raw.res).then((handled) => {
-            request.app.miniprofiler = request.raw.req.miniprofiler;
+            asyncContext.set(request.raw.req.miniprofiler);
+            Object.defineProperty(request.app, 'miniprofiler', { get: () => asyncContext.get() });
+            Object.defineProperty(request.raw.req, 'miniprofiler', { get: () => asyncContext.get() });
 
             if (!handled)
               reply.continue();

lib/middlewares/koa.js

@@ -1,5 +1,7 @@
 'use strict';
 
+const asyncContext = require('../async-context');
+
 module.exports = {
   buildMiddleware: function(provider) {
     return function *(next) {
@@ -12,7 +14,10 @@ module.exports = {
   mainMiddleware: function(enable, authorize, handleRequest) {
     return function *(next) {
       var handled = yield handleRequest(enable, authorize, this.req, this.res);
-      this.state.miniprofiler = this.req.miniprofiler;
+
+      asyncContext.set(this.req.miniprofiler);
+      Object.defineProperty(this.state, 'miniprofiler', { get: () => asyncContext.get() });
+      Object.defineProperty(this.req, 'miniprofiler', { get: () => asyncContext.get() });
 
       if (this.render) {
         var render = this.render;

lib/miniprofiler.js

@@ -15,7 +15,6 @@
  var url = require('url');
  var ui = require('./ui.js');
  var clientParser = require('./client-parser.js');
- var ContinuationLocalStorage = require('asyncctx').ContinuationLocalStorage;
 
  const hostname = require('os').hostname;
 var ignoredPaths = [];
@@ -28,7 +27,6 @@ var ignoredPaths = [];
   RedisStorage: require('./storages/redis.js')
 };
 
-var cls = new ContinuationLocalStorage();
 var storage = new exports.storage.InMemoryStorage({ max: 100, maxAge: 1000 * 60 * 60 });
 
 exports.configure = configure;
@@ -280,8 +278,7 @@ function include(id) {
     return enabled && authorized ? include(currentRequestExtension.id) : '';
   };
 
-  cls.setContext(currentRequestExtension);
-  Object.defineProperty(request, 'miniprofiler', { get: () => cls.getContext() });
+  request.miniprofiler = currentRequestExtension;
 
   return currentRequestExtension;
 }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "miniprofiler",
-  "version": "1.2.3",
+  "version": "2.0.0",
   "description": "A simple but effective mini-profiler.",
   "main": "lib/miniprofiler.js",
   "scripts": {
@@ -26,7 +26,6 @@
   "license": "Apache-2.0",
   "readmeFilename": "README.md",
   "dependencies": {
-    "asyncctx": "^1.1.0",
     "lru-cache": "^4.0.1"
   },
   "tags": [