use encode/decodeURIComponent for cookie encoding/decoding

Some server stacks touch cookies in inappropriate ways. Instead of
reading the RFC and escaping only what should be escaped many things
just escape everything. So under the guise of "interoperability", we
will use URI encoding and decoding of the cookie strings. This will also
support cookies that are properly escaped and then some.

See: senchalabs/connect#604

index.js

@@ -50,32 +50,8 @@ var parse = function(str) {
     return obj;
 };
 
-var encode = function(str) {
-    return str.replace(/[ ",;/]/g, function(val) {
-        switch(val) {
-        case ' ': return '%20';
-        case '"': return '%22';
-        case ',': return '%2c';
-        case '/': return '%2f';
-        case ';': return '%3b';
-        }
-    });
-};
-
-var decode = function(str) {
-    return str.replace(/(%2[02cfCF])|(%3[bB])/g, function(val) {
-        switch(val) {
-        case '%20': return ' ';
-        case '%22': return '"';
-        case '%2C':
-        case '%2c': return ',';
-        case '%2F':
-        case '%2f': return '/';
-        case '%3B':
-        case '%3b': return ';';
-        }
-    });
-};
+var encode = encodeURIComponent;
+var decode = decodeURIComponent;
 
 module.exports.serialize = serialize;
 module.exports.parse = parse;

test/serialize.js

@@ -45,7 +45,7 @@ test('maxAge', function() {
 });
 
 test('escaping', function() {
-    assert.deepEqual('cat=+%20', cookie.serialize('cat', '+ '));
+    assert.deepEqual('cat=%2B%20', cookie.serialize('cat', '+ '));
 });
 
 test('parse->serialize', function() {