Remove type checking on type check option

README.md

@@ -67,7 +67,7 @@ Controls the maximum request body size. If this is a number, then the value spec
 
 #### type
 
-The expected `Content-Type` of the XML request to be parsed. Overrides the default content types, can be a String or Array of Strings.
+The type option is used to determine what media type the middleware will parse. This option can be a string, array of strings, or a function. If not a function, type option is passed directly to the type-is library and this can be an extension name (like xml), a mime type (like application/xml), or a mime type with a wildcard (like */* or */xml). If a function, the type option is called as fn(req) and the request is parsed if it returns a truthy value. Defaults to `['*/xml', '+xml']`.
 
 #### verify
 

index.js

@@ -15,9 +15,6 @@ module.exports = function(bodyParser) {
     options = options || {};
 
     options.type = options.type || DEFAULT_TYPES;
-    if(!Array.isArray(options.type)) {
-      options.type = [options.type];
-    }
 
     var textParser = bodyParser.text(options);
     return function xmlParser(req, res, next) {

test.js

@@ -55,7 +55,7 @@ describe('XML Body Parser', function() {
   });
 
   it('should accept xmlParseOptions', function(done) {
-   createServer({
+    createServer({
       xmlParseOptions: {
         normalize: true,     // Trim whitespace inside text nodes
         normalizeTags: true, // Transform tags to lowercase
@@ -91,6 +91,16 @@ describe('XML Body Parser', function() {
         .expect(200, { parsed: { customer: { name: ['Bob'] } } }, done);
   });
 
+  it('should accept custom ContentType as function', function(done) {
+    createServer({
+      type: function() { return true }
+    });
+    request(app)
+        .post('/')
+        .send('<customer><name>Bob</name></customer>')
+        .expect(200, { parsed: { customer: { name: ['Bob'] } } }, done);
+  });
+
   it('should ignore non-XML', function(done) {
     createServer();