changed code example formatting

Author: Leon Strauss

README.md

@@ -6,7 +6,9 @@ Simple plug & play HTTP basic auth middleware for Express.
 
 Just run
 
-    npm install express-basic-auth
+```shell
+npm install express-basic-auth
+```
 
 add the `--save` option to add it to the `dependencies` in your `package.json` as well
 
@@ -15,12 +17,14 @@ add the `--save` option to add it to the `dependencies` in your `package.json` a
 The module will export a function, that you can call with an options object to
 get the middleware:
 
-    var app = require('express')();
-    var basicAuth = require('express-basic-auth');
+```js
+var app = require('express')();
+var basicAuth = require('express-basic-auth');
 
-    app.use(basicAuth({
-        users: { 'admin': 'supersecret' }
-    }));
+app.use(basicAuth({
+    users: { 'admin': 'supersecret' }
+}));
+```
 
 The middleware will now check incoming requests to match the credentials
 `admin:supersecret`.
@@ -38,13 +42,15 @@ containing an object with `user` and `password` properties, filled with the cred
 If you simply want to check basic auth against one or multiple static credentials,
 you can pass those credentials as in the example above:
 
-    app.use(basicAuth({
-        users: {
-            'admin': 'supersecret',
-            'adam': 'password1234',
-            'eve': 'asdfghjkl'
-        }
-    }));
+```js
+app.use(basicAuth({
+    users: {
+        'admin': 'supersecret',
+        'adam': 'password1234',
+        'eve': 'asdfghjkl'
+    }
+}));
+```
 
 The middleware will check incoming requests to have a basic auth header matching
 one of the three passed credentials.
@@ -55,11 +61,13 @@ Alternatively, you can pass your own `authorizer` function, to check the credent
 however you want. It will be called with a username and password and is expected to
 return `true` or `false` to indicate that the credentials were approved or not:
 
-    app.use(basicAuth( { authorizer: myAuthorizer } ));
+```js
+app.use(basicAuth( { authorizer: myAuthorizer } ));
 
-    function myAuthorizer(username, password) {
-        return username.startsWith('A') && password.startsWith('secret');
-    }
+function myAuthorizer(username, password) {
+    return username.startsWith('A') && password.startsWith('secret');
+}
+```
 
 This will authorize all requests with credentials where the username begins with
 `'A'` and the password begins with `'secret'`. In an actual application you would
@@ -74,17 +82,19 @@ as the third parameter, which is expected to be called by standard node conventi
 with an error and a boolean to indicate if the credentials have been approved or not.
 Let's look at the same authorizer again, but this time asynchronous:
 
-    app.use(basicAuth({
-        authorizer: myAsyncAuthorizer,
-        authorizeAsync: true
-    }));
+```js
+app.use(basicAuth({
+    authorizer: myAsyncAuthorizer,
+    authorizeAsync: true
+}));
 
-    function myAsyncAuthorizer(username, password, cb) {
-        if(username.startsWith('A') && password.startsWith('secret'))
-            return cb(null, true);
-        else
-            return cb(null, false)
-    }
+function myAsyncAuthorizer(username, password, cb) {
+    if(username.startsWith('A') && password.startsWith('secret'))
+        return cb(null, true);
+    else
+        return cb(null, false)
+}
+```
 
 ### Challenge
 
@@ -93,18 +103,22 @@ responses of unauthorized requests. You can enable that by adding `challenge: tr
 to the options object. This will cause most browsers to show a popup to enter credentials
 on unauthorized responses:
 
-    app.use(basicAuth({
-        users: { 'someuser': 'somepassword' },
-        challenge: true
-    }));
+```js
+app.use(basicAuth({
+    users: { 'someuser': 'somepassword' },
+    challenge: true
+}));
+```
 
 ## Try it
 
 The repository contains an `example.js` that you can run to play around and try
 the middleware. To use it just put it somewhere (or leave it where it is), run
 
-    npm install express express-basic-auth
-    node example.js
+```shell
+npm install express express-basic-auth
+node example.js
+```
 
 This will start a small express server listening at port 8080. Just look at the file,
 try out the requests and play around with the options.