From b38277be266cfd6b6c3cc9e00730898f62a11f6e Mon Sep 17 00:00:00 2001
From: Pavel Lang <langpavel@phpskelet.org>
Date: Tue, 18 Sep 2012 18:26:08 +0200
Subject: [PATCH] http: add response.headersSent property

Boolean property getter. True if headers was sent, false otherwise.
---
 doc/api/http.markdown                | 4 ++++
 lib/http.js                          | 6 ++++++
 test/simple/test-http-header-read.js | 2 ++
 3 files changed, 12 insertions(+)

diff --git a/doc/api/http.markdown b/doc/api/http.markdown
index c6809067ee5..8d5cd138740 100644
--- a/doc/api/http.markdown
+++ b/doc/api/http.markdown
@@ -398,6 +398,10 @@ or
 
     response.setHeader("Set-Cookie", ["type=ninja", "language=javascript"]);
 
+### response.headersSent
+
+Boolean (read-only). True if headers were sent, false otherwise.
+
 ### response.sendDate
 
 When true, the Date header will be automatically generated and sent in 
diff --git a/lib/http.js b/lib/http.js
index e4d0dcd8f3e..c4e0a77aadf 100644
--- a/lib/http.js
+++ b/lib/http.js
@@ -699,6 +699,12 @@ OutgoingMessage.prototype._renderHeaders = function() {
 };
 
 
+Object.defineProperty(OutgoingMessage.prototype, 'headersSent', {
+  configurable: true,
+  enumerable: true,
+  get: function () { return !!this._header; }
+});
+
 
 OutgoingMessage.prototype.write = function(chunk, encoding) {
   if (!this._header) {
diff --git a/test/simple/test-http-header-read.js b/test/simple/test-http-header-read.js
index de20df6044f..e844deafcf2 100644
--- a/test/simple/test-http-header-read.js
+++ b/test/simple/test-http-header-read.js
@@ -30,7 +30,9 @@ var s = http.createServer(function(req, res) {
   var contentType = 'Content-Type';
   var plain = 'text/plain';
   res.setHeader(contentType, plain);
+  assert.ok(!res.headersSent);
   res.writeHead(200);
+  assert.ok(res.headersSent);
   res.end('hello world\n');
   // This checks that after the headers have been sent, getHeader works
   // and does not throw an exception (Issue 752)