Add option mimeTypesForce

README.md

@@ -151,7 +151,17 @@ Default: `null`
 
 This property allows a user to register custom mime types or extension mappings.
 eg. `{ 'text/html': [ 'phtml' ] }`. Please see the documentation for
-[`node-mime`](https://github.com/broofa/node-mime#mimedefine) for more information.
+[`node-mime`](https://github.com/broofa/node-mime#mimedefinetypemap-force--false) for more information.
+
+### mimeTypesForce
+
+Type: `Boolean`  
+Default: `false`
+
+By default node-mime will throw an error if you try to map a type to an extension 
+that is already assigned to another type. Passing `true` will suppress this behavior 
+(overriding any previous mapping). Please see the documentation for
+[`node-mime`](https://github.com/broofa/node-mime#mimedefinetypemap-force--false) for more information.
 
 ### publicPath
 

index.js

@@ -12,6 +12,7 @@ const defaults = {
   logTime: false,
   logger: null,
   mimeTypes: null,
+  mimeTypesForce: false,
   reporter,
   stats: {
     colors: true,
@@ -38,7 +39,7 @@ module.exports = function wdm(compiler, opts) {
 
   // defining custom MIME type
   if (options.mimeTypes) {
-    mime.define(options.mimeTypes);
+    mime.define(options.mimeTypes, options.mimeTypesForce);
   }
 
   const context = createContext(compiler, options);

test/tests/server.js

@@ -245,6 +245,33 @@ describe('Server', () => {
     });
   });
 
+  describe('force option for custom mimeTypes', () => {
+    before((done) => {
+      app = express();
+      const compiler = webpack(webpackClientServerConfig);
+      instance = middleware(compiler, {
+        stats: 'errors-only',
+        logLevel,
+        index: 'Index.phtml',
+        mimeTypesForce: true,
+        mimeTypes: {
+          'text/html': ['phtml']
+        }
+      });
+      app.use(instance);
+      listen = listenShorthand(done);
+      instance.fileSystem.writeFileSync('/Index.phtml', 'welcome');
+    });
+    after(close);
+
+    it('request to Index.phtml', (done) => {
+      request(app).get('/')
+        .expect('welcome')
+        .expect('Content-Type', /text\/html/)
+        .expect(200, done);
+    });
+  });
+
   describe('WebAssembly', () => {
     before((done) => {
       app = express();