added parser() option and doc for .urlencoded()

README.md

@@ -302,6 +302,16 @@ The `verify` option, if supplied, is called as `verify(req, res, buf, encoding)`
 where `buf` is a `Buffer` of the raw request body and `encoding` is the
 encoding of the request. The parsing can be aborted by throwing an error.
 
+##### parser
+
+The `parser` option, if supplied, is used to in place of the default parser to
+convert the request body into a Javascript object. If this option is supplied,
+both the `extended` and `parameterLimit` options are ignored.
+
+```javascript
+parser(body) -> req.body
+```
+
 ## Errors
 
 The middlewares provided by this module create errors using the

lib/types/urlencoded.js

@@ -56,9 +56,11 @@ function urlencoded (options) {
   }
 
   // create the appropriate query parser
-  var queryparse = extended
+  var parser = opts.parser || (
+    extended
     ? extendedparser(opts)
     : simpleparser(opts)
+  )
 
   // create the appropriate type checking function
   var shouldParse = typeof type !== 'function'
@@ -67,7 +69,7 @@ function urlencoded (options) {
 
   function parse (body) {
     return body.length
-      ? queryparse(body)
+      ? parser(body)
       : {}
   }
 

test/urlencoded.js

@@ -25,6 +25,16 @@ describe('bodyParser.urlencoded()', function () {
       .expect(200, '{"user":"tobi"}', done)
   })
 
+  it('should parse x-www-form-urlencoded with custom parser', function (done) {
+    request(createServer({
+      parser: function (input) { return input.toUpperCase() }
+    }))
+    .post('/')
+    .set('Content-Type', 'application/x-www-form-urlencoded')
+    .send('user=tobi')
+    .expect(200, '"USER=TOBI"', done)
+  })
+
   it('should 400 when invalid content-length', function (done) {
     var urlencodedParser = bodyParser.urlencoded()
     var server = createServer(function (req, res, next) {