added prefix support

lib/index.js

@@ -10,10 +10,18 @@ var NOTFOUND = -1;
 var IDTOKEN = '{:id}';
 
 var defaults = {
-  stripTrailingSlash: true
+  stripTrailingSlash: true,
+  prefix: undefined
 };
 
 
+function stripPrefix(path, prefix) {
+  if (path.indexOf(prefix) === 0) {
+    return path.substring(prefix.length);
+  }
+  return path;
+}
+
 function stripTrailingSlash(path) {
   // single slash '/' is a valid path, it should be ignored
   var lastIndex = path.length - 1;
@@ -89,8 +97,11 @@ module.exports = function(dbname, inAcl, callback, options) {
     debug('method: %s url: %s path: %s', req.method, req.url, req.path);
 
     var path = req.path;
+    if (options.prefix) {
+      path = stripPrefix(path, options.prefix);
+    }
     if (options.stripTrailingSlash) {
-      path = stripTrailingSlash(req.path);
+      path = stripTrailingSlash(path);
     }
 
     if (!req.connection.pskRole) {

test/test-prefix.js

@@ -0,0 +1,110 @@
+'use strict';
+
+var request = require('supertest'),
+  express = require('express'),
+  fspath = require('path'),
+  colors = require('colors'),
+  assert = require('assert');
+
+var lib = require(fspath.join(__dirname, '../lib/index'));
+
+function genericHandlers(router) {
+  var handlers = require('./handlers2');
+  router.get('*', handlers.get);
+  return router;
+}
+
+var acl = [{
+  'role': 'user',
+  'paths': [
+    {
+      'path': '/',
+      'verbs': ['GET']
+    },
+    {
+      'path': '/foo',
+      'verbs': ['GET']
+    }
+  ]
+}];
+
+describe('test-prefix.js - should let all through', function() {
+  describe('strip prefix - true', function() {
+    var app, router;
+    app = express();
+    router = express.Router();
+
+    before(function() {
+      router.all('*', function(req, res, next) {
+        req.connection.pskRole = 'user';
+        next();
+      });
+      router.all(
+        '*',
+        lib('foobar', acl, function(){}, {
+          prefix: '/fit'
+        })
+      );
+      app.use('/', genericHandlers(router));
+    });
+    it('/ should be 200', function(done) {
+      request(app)
+        .get('/')
+        .expect(200, done);
+    });
+    it('/fit/ should be 200', function(done) {
+      request(app)
+        .get('/fit/')
+        .expect(200, done);
+    });
+    it('/foo should be 200', function(done) {
+      request(app)
+        .get('/foo')
+        .expect(200, done);
+    });
+    it('/fit/foo should be 200', function(done) {
+      request(app)
+        .get('/fit/foo')
+        .expect(200, done);
+    });
+  });
+  describe('strip trailing slash - false', function() {
+    var app, router;
+    app = express();
+    router = express.Router();
+
+    before(function() {
+      router.all('*', function(req, res, next) {
+        req.connection.pskRole = 'user';
+        next();
+      })
+      router.all(
+        '*',
+        lib('foobar', acl, function(){}, {
+          prefix: undefined
+        })
+      );
+      app.use('/', genericHandlers(router));
+    });
+    it('/ should be 200', function(done) {
+      request(app)
+        .get('/')
+        .expect(200, done);
+    });
+    it('/fit/ should be 401', function(done) {
+      request(app)
+        .get('/fit/')
+        .expect(401, done);
+    });
+    it('/foo should be 200', function(done) {
+      request(app)
+        .get('/foo')
+        .expect(200, done);
+    });
+    it('/fit/foo should be 401', function(done) {
+      request(app)
+        .get('/fit/foo')
+        .expect(401, done);
+    });
+  });
+});