Add ability to specify paths to ignore

README.md

@@ -77,6 +77,15 @@ history({
 });
 ```
 
+### ignorePaths
+Ignore a list of directories so requests for your assets don't result in a redirect and fetch unwanted content
+
+```javascript
+history({
+  ignorePaths:['/lib/','/app/']
+});
+```
+
 ### rewrites
 Override the index when the request url matches a regex pattern. You can either rewrite to a static string or use a function to transform the incoming request.
 

lib/index.js

@@ -66,13 +66,34 @@ exports = module.exports = function historyApiFallback(options) {
       return next();
     }
 
+    var ignorePaths = options.ignorePaths;
+    if (ignorePaths && pathShouldBeIgnored(parsedUrl, ignorePaths)) {
+      logger(
+        'Not rewriting',
+        req.method,
+        req.url,
+        'because the path is listed as a path that should be ignored. ',
+        ignorePaths
+      );
+      return next();
+    }
+
     rewriteTarget = options.index || '/index.html';
     logger('Rewriting', req.method, req.url, 'to', rewriteTarget);
     req.url = rewriteTarget;
     next();
   };
 };
 
+function pathShouldBeIgnored(parsedUrl, ignoredPaths) {
+  for (var i = 0; i < ignoredPaths.length; i++) {
+    //a little basic because as it's using contains, but probably sufficient.
+    if (parsedUrl.path.indexOf(ignoredPaths[i]) > -1){
+      return true;
+    }
+  }
+}
+
 function evaluateRewriteRule(parsedUrl, match, rule) {
   if (typeof rule === 'string') {
     return rule;