Messagepack support.

src/com/cognitect/transit_with_msgpack.js

@@ -0,0 +1,35 @@
+
+"use strict";
+
+goog.require("com.cognitect.transit");
+
+var transit = com.cognitect.transit,
+    org_reader_func = transit.reader,
+    org_writer_func = transit.writer;
+
+transit.reader = function (type, opts) {
+    if (type === "msgpack") {
+        var json_reader = org_reader_func("json", opts),
+            old_read_func = json_reader.read;
+        json_reader.read = function (bytes) {
+            var unpacked = msgpack.unpack(bytes),
+                unpacked_string = JSON.stringify(unpacked);
+            return old_read_func.call(json_reader, unpacked_string);
+        };
+        return json_reader;
+    }
+    return org_reader_func(type, opts);
+};
+
+transit.writer = function (type, opts) {
+    if (type === "msgpack") {
+        var json_writer = opts === undefined ? org_writer_func("json") : org_writer_func("json", opts),
+            old_write_func = json_writer.write;
+        json_writer.write = function (obj, opts_i) {
+            var transit_json = opts_i === undefined ? old_write_func.call(json_writer, obj) : old_write_func.call(json_writer, obj, opts_i);
+            return msgpack.pack(JSON.parse(transit_json));
+        };
+        return json_writer;
+    }
+    return org_writer_func(type, opts);
+};