diff --git a/lib/server.js b/lib/server.js
index 76362d412..de92322cc 100644
--- a/lib/server.js
+++ b/lib/server.js
@@ -241,6 +241,8 @@ exports.start = function(cliOptions, done) {
     preprocess: ['factory', preprocessor.createPreprocessor],
     fileList: ['type', FileList],
     webServer: ['factory', ws.createWebServer],
+    customFileHandlers: ['value', []],
+    customScriptTypes: ['value', []],
     reporter: ['factory', reporter.createReporters],
     capturedBrowsers: ['type', browser.Collection]
   }];
diff --git a/lib/web-server.js b/lib/web-server.js
index 3419b42b6..3a3a41887 100644
--- a/lib/web-server.js
+++ b/lib/web-server.js
@@ -12,7 +12,7 @@ var helper = require('./helper');
 var proxy = require('./proxy');
 var log = require('./logger').create('web server');
 
-var SCRIPT_TAG = '<script type="text/javascript" src="%s"></script>';
+var SCRIPT_TAG = '<script type="%s" src="%s"></script>';
 
 
 var setNoCacheHeaders = function(response) {
@@ -44,10 +44,9 @@ var serveStaticFile = function(file, response, process) {
 
 
 var createKarmaSourceHandler = function(promiseContainer, staticFolder, adapterFolder,
-    baseFolder, urlRoot) {
+    baseFolder, urlRoot, customFileHandlers, customScriptTypes) {
   return function(request, response, next) {
     var requestUrl = request.url.replace(/\?.*/, '');
-
     if (requestUrl === urlRoot.substr(0, urlRoot.length - 1)) {
       response.setHeader('Location', urlRoot);
       response.writeHead(301);
@@ -60,6 +59,15 @@ var createKarmaSourceHandler = function(promiseContainer, staticFolder, adapterF
 
     requestUrl = requestUrl.substring(urlRoot.length - 1);
 
+    // Check if any of the custom file handlers provided by plugins should be
+    // invoked first.
+    for (var i = 0; i < customFileHandlers.length; i++) {
+      if (customFileHandlers[i].urlRegex.test(requestUrl)) {
+        return customFileHandlers[i].handler(request, response, staticFolder,
+            adapterFolder, baseFolder, urlRoot);
+      }
+    }
+
     if (requestUrl === '/') {
       return serveStaticFile(staticFolder + '/client.html', response);
     }
@@ -82,6 +90,13 @@ var createKarmaSourceHandler = function(promiseContainer, staticFolder, adapterF
 
           var scriptTags = files.included.map(function(file) {
             var filePath = file.path;
+            var scriptType = 'text/javascript';
+            customScriptTypes.forEach(function(type) {
+              var extension = '.' + type.extension;
+              if (filePath.indexOf(extension, filePath.length - extension.length) !== -1) {
+                scriptType = type.contentType;
+              }
+            });
 
             if (!file.isUrl) {
               // TODO(vojta): serve these files from within urlRoot as well
@@ -98,7 +113,7 @@ var createKarmaSourceHandler = function(promiseContainer, staticFolder, adapterF
               }
             }
 
-            return util.format(SCRIPT_TAG, filePath);
+            return util.format(SCRIPT_TAG, scriptType, filePath);
           });
 
           var mappings = files.served.map(function(file) {
@@ -175,9 +190,9 @@ var createSourceFileHandler = function(promiseContainer, adapterFolder, baseFold
 
 
 var createHandler = function(promiseContainer, staticFolder, adapterFolder, baseFolder, proxyFn,
-    proxies, urlRoot) {
+    proxies, urlRoot, customFileHandlers, customScriptTypes) {
   var karmaSrcHandler = createKarmaSourceHandler(promiseContainer, staticFolder,
-      adapterFolder, baseFolder, urlRoot);
+      adapterFolder, baseFolder, urlRoot, customFileHandlers, customScriptTypes);
   var proxiedPathsHandler = proxy.createProxyHandler(proxyFn, proxies);
   var sourceFileHandler = createSourceFileHandler(promiseContainer, adapterFolder, baseFolder);
 
@@ -194,7 +209,8 @@ var createHandler = function(promiseContainer, staticFolder, adapterFolder, base
 };
 
 
-exports.createWebServer = function (baseFolder, proxies, urlRoot) {
+exports.createWebServer = function (baseFolder, proxies, urlRoot,
+    customFileHandlers, customScriptTypes) {
   var staticFolder = path.normalize(__dirname + '/../static');
   var adapterFolder = path.normalize(__dirname + '/../adapter');
 
@@ -204,7 +220,8 @@ exports.createWebServer = function (baseFolder, proxies, urlRoot) {
 
   var server = http.createServer(createHandler(promiseContainer,
       helper.normalizeWinPath(staticFolder), helper.normalizeWinPath(adapterFolder), baseFolder,
-      new httpProxy.RoutingProxy({changeOrigin: true}), proxies, urlRoot));
+      new httpProxy.RoutingProxy({changeOrigin: true}), proxies, urlRoot, customFileHandlers,
+      customScriptTypes));
 
   server.updateFilesPromise = function(promise) {
     promiseContainer.promise = promise;
@@ -213,4 +230,5 @@ exports.createWebServer = function (baseFolder, proxies, urlRoot) {
   return server;
 };
 
-exports.createWebServer.$inject = ['config.basePath', 'config.proxies', 'config.urlRoot'];
+exports.createWebServer.$inject = ['config.basePath', 'config.proxies', 'config.urlRoot',
+    'customFileHandlers', 'customScriptTypes'];
diff --git a/test/unit/web-server.spec.coffee b/test/unit/web-server.spec.coffee
index 7dacba37c..63525fe76 100644
--- a/test/unit/web-server.spec.coffee
+++ b/test/unit/web-server.spec.coffee
@@ -71,7 +71,7 @@ describe 'web-server', ->
     beforeEach ->
       servedFiles defaultFiles
       handler = m.createHandler promiseContainer, staticFolderPath, adapterFolderPath, baseFolder, mockProxy,
-          {'/_karma_/': 'http://localhost:9000', '/base/': 'http://localhost:1000'}, '/_karma_/'
+          {'/_karma_/': 'http://localhost:9000', '/base/': 'http://localhost:1000'}, '/_karma_/', [], []
       actualOptions = {}
       response = new responseMock()
       nextSpy = sinon.spy()
@@ -142,7 +142,7 @@ describe 'web-server', ->
       includedFiles defaultFiles
       response = new responseMock
       globals.process.platform = 'darwin'
-      tcularSrcHandler = m.createKarmaSourceHandler promiseContainer, staticFolderPath, adapterFolderPath, baseFolder, '/_karma_/'
+      tcularSrcHandler = m.createKarmaSourceHandler promiseContainer, staticFolderPath, adapterFolderPath, baseFolder, '/_karma_/', [], []
 
 
     it 'should serve client.html', (done) ->
@@ -261,10 +261,48 @@ describe 'web-server', ->
         expect(response.statusCode).to.equal 301
         expect(response.getHeader('Location')).to.equal '/_karma_/'
         done()
-
+      
       tcularSrcHandler new httpMock.ServerRequest('/_karma_'), response, nextSpy
 
 
+
+    it 'should invoke custom handler', (done) ->
+      response.once 'end', ->
+        expect(nextSpy).not.to.have.been.called
+        expect(response.statusCode).to.equal 200
+        expect(response._content.toString()).to.equal 'Hello World'
+        done()
+
+      customHandler =
+        urlRegex: /\/test/,
+        handler: (request, response, staticFolder, adapterFolder, baseFolder, urlRoot) ->
+          response.end 'Hello World'
+
+      tcularSrcHandler = m.createKarmaSourceHandler promiseContainer, staticFolderPath,
+          adapterFolderPath, baseFolder, '/_karma_/', [customHandler], []
+      tcularSrcHandler new httpMock.ServerRequest('/_karma_/test'), response, nextSpy
+
+
+    it 'should set custom script type', (done) ->
+      mocks.fs._touchFile '/tcular/static/context.html', 0, 'CONTEXT\n%SCRIPTS%'
+      includedFiles [{path: 'http://some.url.com/whatever.blah', isUrl: true}]
+
+      response.once 'end', ->
+        expect(response._content.toString()).to.equal  'CONTEXT\n' +
+            '<script type="application/blah" src="http://some.url.com/whatever.blah"></script>'
+        expect(response.statusCode).to.equal 200
+        done()
+
+      customScriptType =
+        extension: 'blah',
+        contentType: 'application/blah'
+
+      tcularSrcHandler = m.createKarmaSourceHandler promiseContainer, staticFolderPath,
+          adapterFolderPath, baseFolder, '/_karma_/', [], [customScriptType]
+
+      tcularSrcHandler new httpMock.ServerRequest('/_karma_/context.html'), response, nextSpy
+
+
   #============================================================================
   # Source Files Handler
   #============================================================================