http: fix no dumping after `maybeReadMore`

When `maybeReadMore` kicks in on a first bytes of incoming data, the
`req.read(0)` will be invoked and the `req._consuming` will be set to
`true`. This seemingly harmless property leads to a dire consequences:
the server won't call `req._dump()` and the whole HTTP/1.1 pipeline will
hang (single connection).

PR-URL: https://github.com/nodejs/node/pull/7211
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

1 files changed, 51 insertions, 0 deletions

diff --git a/test/parallel/test-http-no-read-no-dump.js b/test/parallel/test-http-no-read-no-dump.js
new file mode 100644
index 0000000000..c509146c0a
--- /dev/null
+++ b/test/parallel/test-http-no-read-no-dump.js
@@ -0,0 +1,51 @@
+'use strict';
+const common = require('../common');
+const http = require('http');
+
+let onPause = null;
+
+const server = http.createServer((req, res) => {
+  if (req.method === 'GET')
+    return res.end();
+
+  res.writeHead(200);
+  res.flushHeaders();
+
+  req.connection.on('pause', () => {
+    res.end();
+    onPause();
+  });
+}).listen(common.PORT, common.mustCall(() => {
+  const agent = new http.Agent({
+    maxSockets: 1,
+    keepAlive: true
+  });
+
+  const post = http.request({
+    agent: agent,
+    method: 'POST',
+    port: common.PORT,
+  }, common.mustCall((res) => {
+    res.resume();
+
+    post.write(Buffer.alloc(16 * 1024).fill('X'));
+    onPause = () => {
+      post.end('something');
+    };
+  }));
+
+  /* What happens here is that the server `end`s the response before we send
+   * `something`, and the client thought that this is a green light for sending
+   * next GET request
+   */
+  post.write('initial');
+
+  http.request({
+    agent: agent,
+    method: 'GET',
+    port: common.PORT,
+  }, common.mustCall((res) => {
+    server.close();
+    res.connection.end();
+  })).end();
+}));