Fixing timeout detection in Node.js environment

Fixes axios#2710
Reverts axios#1752

lib/adapters/http.js

@@ -19,10 +19,14 @@ var isHttps = /https:?/;
 /*eslint consistent-return:0*/
 module.exports = function httpAdapter(config) {
   return new Promise(function dispatchHttpRequest(resolvePromise, rejectPromise) {
+    var timer;
+
     var resolve = function resolve(value) {
+      clearTimeout(timer);
       resolvePromise(value);
     };
     var reject = function reject(value) {
+      clearTimeout(timer);
       rejectPromise(value);
     };
     var data = config.data;
@@ -250,16 +254,22 @@ module.exports = function httpAdapter(config) {
     });
 
     // Handle request timeout
+    //
+    // There are many types of timeouts:
+    // DNS Timeout, Connect Timeout, Read/Write Timeout (idle timeout), and Call Timeout.
+    // Call Timeout measures from DNS Lookup to response body receiving completion.
+    //
+    // Currently, `timeout` option in Browser XHR indicates "Call Timeout".
+    // Create internal timer to match browser-side behavior.
     if (config.timeout) {
-      // Sometime, the response will be very slow, and does not respond, the connect event will be block by event loop system.
-      // And timer callback will be fired, and abort() will be invoked before connection, then get "socket hang up" and code ECONNRESET.
-      // At this time, if we have a large number of request, nodejs will hang up some socket on background. and the number will up and up.
-      // And then these socket which be hang up will devoring CPU little by little.
-      // ClientRequest.setTimeout will be fired on the specify milliseconds, and can make sure that abort() will be fired after connect.
-      req.setTimeout(config.timeout, function handleRequestTimeout() {
+      // Set internal timer to detect "Call Timeout"
+      // @see https://github.com/axios/axios/issues/2710#issuecomment-605693456
+      timer = setTimeout(function handleReadTimeout() {
+        // Stop receiving remaining bytes and close socket
         req.abort();
-        reject(createError('timeout of ' + config.timeout + 'ms exceeded', config, 'ECONNABORTED', req));
-      });
+
+        reject(createError('timeout of ' + config.timeout + 'ms exceeded', config, 'ETIMEDOUT', req));
+      }, config.timeout);
     }
 
     if (config.cancelToken) {