http: ignore multiple abort

Author: ronag

lib/_http_client.js

@@ -312,10 +312,12 @@ ClientRequest.prototype._implicitHeader = function _implicitHeader() {
 };
 
 ClientRequest.prototype.abort = function abort() {
-  if (!this.aborted) {
-    process.nextTick(emitAbortNT.bind(this));
+  if (this.aborted) {
+    return;
   }
+
   this.aborted = true;
+  process.nextTick(emitAbortNT.bind(this));
 
   // If we're aborting, we don't care about any more response data.
   if (this.res) {

test/parallel/test-http-client-abort2.js

@@ -30,7 +30,9 @@ const server = http.createServer(common.mustCall((req, res) => {
 server.listen(0, common.mustCall(() => {
   const options = { port: server.address().port };
   const req = http.get(options, common.mustCall((res) => {
+    res._dump = common.mustCall(res._dump.bind(res));
     res.on('data', (data) => {
+      req.abort();
       req.abort();
       server.close();
     });