Don't use parseUri for HTTP server

The big parseUri RE was showing up often in profiles - this is simpler and
yields better performance by taking advantage of the C http parser.

doc/api.txt

@@ -665,7 +665,7 @@ The request method as a string. Read only. Example:
 
 +request.uri+ ::
 Request URI Object. This contains only the parameters that are
-present in the actual HTTP request. That is, if the request is
+present in the actual HTTP request. If the request is
 +
 ----------------------------------------
 GET /status?name=ryan HTTP/1.1\r\n
@@ -676,23 +676,12 @@ Accept: text/plain\r\n
 Then +request.uri+ will be
 +
 ----------------------------------------
-{ path: "/status",
-  file: "status",
-  directory: "/",
-  params: { "name" : "ryan" }
+{ full: "/status?name=ryan",
+  path: "/status",
+  queryString: "name=ryan",
+  fragment: ""
 }
 ----------------------------------------
-+
-In particular, note that +request.uri.protocol+ is
-+undefined+. This is because there was no URI protocol given
-in the actual HTTP Request.
-+
-Here is what's available: +request.uri.anchor+, +request.uri.query+,
-+request.uri.file+, +request.uri.directory+, +request.uri.path+,
-+request.uri.relative+, +request.uri.port+, +request.uri.host+,
-+request.uri.password+, +request.uri.user+, +request.uri.authority+,
-+request.uri.protocol+, +request.uri.params+, +request.uri.toString()+,
-+request.uri.source+
 
 
 +request.headers+ ::

lib/http.js

@@ -125,7 +125,13 @@ function IncomingMessage (connection) {
   this.headers = {};
 
   // request (server) only
-  this.uri = "";
+  this.uri = {
+    full: "",
+    queryString: "",
+    fragment: "",
+    path: ""
+  };
+
   this.method = null;
 
   // response (client) only
@@ -338,7 +344,19 @@ function createIncomingMessageStream (connection, incoming_listener) {
 
   // Only servers will get URI events.
   connection.addListener("uri", function (data) {
-    incoming.uri += data;
+    incoming.uri.full += data;
+  });
+
+  connection.addListener("path", function (data) {
+    incoming.uri.path += data;
+  });
+
+  connection.addListener("fragment", function (data) {
+    incoming.uri.fragment += data;
+  });
+
+  connection.addListener("queryString", function (data) {
+    incoming.uri.queryString += data;
   });
 
   connection.addListener("headerField", function (data) {
@@ -372,7 +390,6 @@ function createIncomingMessageStream (connection, incoming_listener) {
     if (info.method) {
       // server only
       incoming.method = info.method;
-      incoming.uri = exports.parseUri(incoming.uri); // TODO parse the URI lazily?
     } else {
       // client only
       incoming.statusCode = info.statusCode;

src/http.cc

@@ -95,6 +95,39 @@ HTTPConnection::on_uri (http_parser *parser, const char *buf, size_t len)
   return 0;
 }
 
+int
+HTTPConnection::on_query_string (http_parser *parser, const char *buf, size_t len)
+{
+  HandleScope scope;
+  HTTPConnection *connection = static_cast<HTTPConnection*>(parser->data);
+  assert(connection->attached_);
+  Local<Value> argv[1] = { String::New(buf, len) };
+  connection->Emit("queryString", 1, argv);
+  return 0;
+}
+
+int
+HTTPConnection::on_path (http_parser *parser, const char *buf, size_t len)
+{
+  HandleScope scope;
+  HTTPConnection *connection = static_cast<HTTPConnection*>(parser->data);
+  assert(connection->attached_);
+  Local<Value> argv[1] = { String::New(buf, len) };
+  connection->Emit("path", 1, argv);
+  return 0;
+}
+
+int
+HTTPConnection::on_fragment (http_parser *parser, const char *buf, size_t len)
+{
+  HandleScope scope;
+  HTTPConnection *connection = static_cast<HTTPConnection*>(parser->data);
+  assert(connection->attached_);
+  Local<Value> argv[1] = { String::New(buf, len) };
+  connection->Emit("fragment", 1, argv);
+  return 0;
+}
+
 int
 HTTPConnection::on_header_field (http_parser *parser, const char *buf, size_t len)
 {

src/http.h

@@ -24,6 +24,9 @@ protected:
     http_parser_init (&parser_, type);
     parser_.on_message_begin    = on_message_begin;
     parser_.on_uri              = on_uri;
+    parser_.on_path             = on_path;
+    parser_.on_fragment         = on_fragment;
+    parser_.on_query_string     = on_query_string;
     parser_.on_header_field     = on_header_field;
     parser_.on_header_value     = on_header_value;
     parser_.on_headers_complete = on_headers_complete;
@@ -36,6 +39,9 @@ protected:
 
   static int on_message_begin (http_parser *parser);
   static int on_uri (http_parser *parser, const char *at, size_t length);
+  static int on_query_string (http_parser *parser, const char *at, size_t length);
+  static int on_path (http_parser *parser, const char *at, size_t length);
+  static int on_fragment (http_parser *parser, const char *at, size_t length);
   static int on_header_field (http_parser *parser, const char *buf, size_t len);
   static int on_header_value (http_parser *parser, const char *buf, size_t len);
   static int on_headers_complete (http_parser *parser);