fixed HTTP duplicated header bug

added test case for HTTP duplicated header bug on keepalive

lib/http.js

@@ -355,11 +355,12 @@ function createIncomingMessageStream (connection, incoming_listener) {
 
   stream.addListener("incoming", incoming_listener);
 
-  var incoming;
-  var field = null, value = null;
+  var incoming, field, value;
 
   connection.addListener("messageBegin", function () {
     incoming = new IncomingMessage(connection);
+    field = null;
+    value = null;
   });
 
   // Only servers will get URI events.

test/mjsunit/test-http-server.js

@@ -23,6 +23,14 @@ http.createServer(function (req, res) {
   if (req.id == 1) {
     assertEquals("POST", req.method);
     assertEquals("/quit", req.uri.path);
+  }
+
+  if (req.id == 2) {
+    assertEquals("foo", req.headers['x-x']);
+  }
+
+  if (req.id == 3) {
+    assertEquals("bar", req.headers['x-x']);
     this.close();
     //puts("server closed");
   }
@@ -49,10 +57,17 @@ c.addListener("receive", function (chunk) {
 
   if (requests_sent == 1) {
     c.send("POST /quit HTTP/1.1\r\n\r\n");
+    requests_sent += 1;
+  }
+
+  if (requests_sent == 2) {
+    c.send("GET / HTTP/1.1\r\nX-X: foo\r\n\r\n"
+          +"GET / HTTP/1.1\r\nX-X: bar\r\n\r\n");
     c.close();
     assertEquals(c.readyState, "readOnly");
-    requests_sent += 1;
+    requests_sent += 2;
   }
+
 });
 
 c.addListener("eof", function () {
@@ -64,8 +79,8 @@ c.addListener("close", function () {
 });
 
 process.addListener("exit", function () {
-  assertEquals(2, request_number);
-  assertEquals(2, requests_sent);
+  assertEquals(4, request_number);
+  assertEquals(4, requests_sent);
 
   var hello = new RegExp("/hello");
   assertTrue(hello.exec(server_response) != null);