r9131: started adding the server side code for "AJAJ" (asynchronous javascript and javascript)

This is rather like AJAX, but passes around javascript objects between
the client and server, taking advantage of the fact that we have the
same language on both client and server.
(This used to be commit 5f9e00fb7f36f3351f40da93acfe47c911f6f65f)

1 files changed, 100 insertions, 0 deletions

diff --git a/source4/scripting/libjs/encoder.js b/source4/scripting/libjs/encoder.js
new file mode 100644
index 0000000000..65b2854d30
--- /dev/null
+++ b/source4/scripting/libjs/encoder.js
@@ -0,0 +1,100 @@
+/*
+	server side js functions for encoding/decoding objects into linear strings
+
+	Copyright Andrew Tridgell 2005
+	released under the GNU GPL Version 2 or later
+*/
+/*
+	usage:
+
+	  enc = encodeObject(obj);
+	  obj = decodeObject(enc);
+
+       The encoded format of the object is a string that is safe to
+       use in URLs
+
+       Note that only data elements are encoded, not functions
+*/
+
+function __count_members(o) {
+	var i, count = 0;
+	for (i in o) { 
+		count++;  
+	}
+	return count;
+}
+
+function __replace(str, old, rep) {
+	var s = string_init();
+	var a = s.split(old, str);
+	var j = s.join(rep, a);
+	return s.join(rep, a);
+}
+
+function encodeObject(o) {
+	var s = string_init();
+	var i, r = s.sprintf("%u:", __count_members(o));
+	for (i in o) {
+		var t = typeof(o[i]);
+		if (t == 'object' && o[i] == null) {
+			t = 'null';
+		}
+		if (t == 'object') {
+			r = s.sprintf("%s%s:%s:%s", r, i, t, encodeObject(o[i]));
+		} else if (t == "string") {
+			var enc = s.encodeURIComponent(o[i]);
+			var rep = __replace(enc, '%', '#');
+			r = s.sprintf("%s%s:%s:%s:", 
+				      r, i, t, __replace(s.encodeURIComponent(o[i]),'%','#'));
+		} else if (t == "boolean" || t == "number") {
+			r = s.sprintf("%s%s:%s:%s:", r, i, t, "" + o[i]);
+		} else if (t == "undefined" || t == "null") {
+			r = s.sprintf("%s%s:%s:", r, i, t);
+		} else {
+			println("Unable to linearise type " + t);
+		}
+	}
+	return r;
+}
+
+function decodeObjectArray(a) {
+	var s = string_init();
+	var o = new Object();
+	var i, count = a[a.i]; a.i++;
+	for (i=0;i<count;i++) {
+		var name  = a[a.i]; a.i++;
+		var type  = a[a.i]; a.i++;
+		var value;
+		if (type == 'object') {
+			o[name] = decodeObjectArray(a);
+		} else if (type == "string") {
+			value = s.decodeURIComponent(__replace(a[a.i],'#','%')); a.i++;
+			o[name] = value;
+		} else if (type == "boolean") {
+			value = a[a.i]; a.i++;
+			if (value == 'true') {
+				o[name] = true;
+			} else {
+				o[name] = false;
+			}
+		} else if (type == "undefined") {
+			o[name] = undefined;
+		} else if (type == "null") {
+			o[name] = null;
+		} else if (type == "number") {
+			value = a[a.i]; a.i++;
+			o[name] = value + 0;
+		} else {
+			println("Unable to delinearise type " + t);
+			assert(t == "supported type");
+		}
+	}
+	return o;
+}
+
+function decodeObject(str) {
+	var s = string_init();
+	var a = s.split(':', str);
+	a.i = 0;
+	return decodeObjectArray(a);
+}