Add keep-alive handling.

src/http.cc

@@ -23,6 +23,7 @@
 
 #define STATUS_CODE_SYMBOL String::NewSymbol("status_code")
 #define HTTP_VERSION_SYMBOL String::NewSymbol("http_version")
+#define SHOULD_KEEP_ALIVE_SYMBOL String::NewSymbol("should_keep_alive")
 
 using namespace v8;
 using namespace node;
@@ -163,6 +164,11 @@ HTTPConnection::on_headers_complete (http_parser *parser)
           ); 
   message_handler->Set(HTTP_VERSION_SYMBOL, String::New(version));
 
+  // SHOULD KEEP ALIVE
+  message_handler->Set( SHOULD_KEEP_ALIVE_SYMBOL
+                      , http_parser_should_keep_alive(&connection->parser_) ? True() : False()
+                      );
+
 
   Local<Value> on_headers_complete_v = message_handler->Get(ON_HEADERS_COMPLETE_SYMBOL);
   if (on_headers_complete_v->IsFunction() == false) return 0;

src/http.js

@@ -154,8 +154,15 @@ node.http.Server = function (RequestHandler, options) {
           }
         }
 
-        if (sent_connection_header == false)
-          header += "Connection: keep-alive\r\n";
+        // keep-alive logic 
+        if (sent_connection_header == false) {
+          if (this.should_keep_alive) {
+            header += "Connection: keep-alive\r\n";
+          } else {
+            connection_close = true;
+            header += "Connection: close\r\n";
+          }
+        }
 
         if (sent_content_length_header == false && sent_transfer_encoding_header == false) {
           header += "Transfer-Encoding: chunked\r\n";
@@ -193,12 +200,8 @@ node.http.Server = function (RequestHandler, options) {
           responses.shift();
         }
 
-        if (responses.length == 0) {
+        if (responses.length == 0 && connection_close) {
           connection.fullClose();
-          // TODO keep-alive logic 
-          //  if http/1.0 without "Connection: keep-alive" header - yes
-          //  if http/1.1 if the request was not GET or HEAD - yes
-          //  if http/1.1 without "Connection: close" header - yes
         }
       };
     }
@@ -239,6 +242,7 @@ node.http.Server = function (RequestHandler, options) {
       this.onHeadersComplete = function () {
         req.http_version = this.http_version;
         req.method = this.method;
+        res.should_keep_alive = this.should_keep_alive;
         return req.onHeadersComplete();
       };