Push falsey values, and also emit the bytesRead for strings when emit…

…ting the "data" event.

lib/ejsgi/stream.js

@@ -17,7 +17,7 @@ function Stream () {
   this.write = function (data) {
     if (buffer.closed) throw new Error("Cannot write after EOF.");
     if (data === null) buffer.closed = true;
-    if (data || data === null) buffer.push(data);
+    buffer.push(data);
     flow(this, buffer);
   };
   this.close = function () {
@@ -35,7 +35,7 @@ function flow (emitter, buffer) {
     return;
   }
   var chunk = buffer.shift();
-  emitter.emit("data", chunk);
+  emitter.emit("data", chunk, (typeof(chunk) === "string" ? chunk.length : undefined));
   if (chunk === null) {
     emitter.emit("eof");
     return;