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

README.md

@@ -171,6 +171,15 @@ 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 transform the body of a request
+before being set to `req.body`.
+
+```javascript
+parser(body) -> req.body
+```
+
 ### bodyParser.text([options])
 
 Returns middleware that parses all bodies as a string and only looks at

lib/types/raw.js

@@ -39,6 +39,7 @@ function raw (options) {
     : opts.limit
   var type = opts.type || 'application/octet-stream'
   var verify = opts.verify || false
+  var parser = opts.parser || defaultParser
 
   if (verify !== false && typeof verify !== 'function') {
     throw new TypeError('option verify must be function')
@@ -50,7 +51,7 @@ function raw (options) {
     : type
 
   function parse (buf) {
-    return buf
+    return parser(buf)
   }
 
   return function rawParser (req, res, next) {
@@ -90,6 +91,10 @@ function raw (options) {
   }
 }
 
+function defaultParser (buf) {
+  return buf;
+}
+
 /**
  * Get the simple type checker.
  *

test/raw.js

@@ -25,6 +25,16 @@ describe('bodyParser.raw()', function () {
       .expect(200, 'buf:746865207573657220697320746f6269', done)
   })
 
+  it('should parse application/octet-stream with a custom parser', function (done) {
+    request(createServer({
+      parser: function (body) { return body.toString("utf8") }
+    }))
+    .post('/')
+    .set('Content-Type', 'application/octet-stream')
+    .send('the user is tobi')
+    .expect(200, '"the user is tobi"', done)
+  })
+
   it('should 400 when invalid content-length', function (done) {
     var rawParser = bodyParser.raw()
     var server = createServer(function (req, res, next) {