docs: fix headings & syntax highlighting (#313)

Author: dflock

recipes/modify-post.md

@@ -1,4 +1,4 @@
-##Modify Post Parameters:
+## Modify Post Parameters:
 The code example below illustrates how to modify POST body data prior to forwarding to the proxy target.
 Key to this example is the *"OnProxyReq"* event handler  that creates a new POST body that can be manipulated to format the POST data as required.  For example: inject new POST parameters that should only be visible server side.
 
@@ -8,67 +8,69 @@ Since this only modifys the request body stream the original POST body parameter
 
 ## Example:
 
-    'use strict';
-    
-    var express = require('express');
-    var ProxyMiddleware = require('http-proxy-middleware');
-    var router = express.Router();
-    
-    var proxy_filter = function (path, req) {
-        return path.match('^/docs') && ( req.method === 'GET' || req.method === 'POST' );
-    };
-    
-    var proxy_options = {
-        target: 'http://localhost:8080',
-        pathRewrite: {
-            '^/docs' : '/java/rep/server1' // Host path & target path conversion
-        },
-        onError(err, req, res) {
-            res.writeHead(500, {
-                'Content-Type': 'text/plain'
-            });
-            res.end('Something went wrong. And we are reporting a custom error message.' + err);
-        },
-        onProxyReq(proxyReq, req, res) {
-            if ( req.method == "POST" && req.body ) {
-                // Add req.body logic here if needed....
-    
-               // ....
-    
-                // Remove body-parser body object from the request
-                if ( req.body ) delete req.body;
-    
-                // Make any needed POST parameter changes
-                let body = new Object();
-    
-                body.filename = 'reports/statistics/summary_2016.pdf';
-                body.routeid = 's003b012d002';
-                body.authid = 'bac02c1d-258a-4177-9da6-862580154960';
-    
-                // URI encode JSON object
-                body = Object.keys( body ).map(function( key ) {
-                    return encodeURIComponent( key ) + '=' + encodeURIComponent( body[ key ])
-                }).join('&');
-    
-                // Update header
-                proxyReq.setHeader( 'content-type', 'application/x-www-form-urlencoded' );
-                proxyReq.setHeader( 'content-length', body.length );
-    
-                // Write out body changes to the proxyReq stream
-                proxyReq.write( body );
-                proxyReq.end();
-            }
+```js
+'use strict';
+
+var express = require('express');
+var ProxyMiddleware = require('http-proxy-middleware');
+var router = express.Router();
+
+var proxy_filter = function (path, req) {
+    return path.match('^/docs') && ( req.method === 'GET' || req.method === 'POST' );
+};
+
+var proxy_options = {
+    target: 'http://localhost:8080',
+    pathRewrite: {
+        '^/docs' : '/java/rep/server1' // Host path & target path conversion
+    },
+    onError(err, req, res) {
+        res.writeHead(500, {
+            'Content-Type': 'text/plain'
+        });
+        res.end('Something went wrong. And we are reporting a custom error message.' + err);
+    },
+    onProxyReq(proxyReq, req, res) {
+        if ( req.method == "POST" && req.body ) {
+            // Add req.body logic here if needed....
+
+           // ....
+
+            // Remove body-parser body object from the request
+            if ( req.body ) delete req.body;
+
+            // Make any needed POST parameter changes
+            let body = new Object();
+
+            body.filename = 'reports/statistics/summary_2016.pdf';
+            body.routeid = 's003b012d002';
+            body.authid = 'bac02c1d-258a-4177-9da6-862580154960';
+
+            // URI encode JSON object
+            body = Object.keys( body ).map(function( key ) {
+                return encodeURIComponent( key ) + '=' + encodeURIComponent( body[ key ])
+            }).join('&');
+
+            // Update header
+            proxyReq.setHeader( 'content-type', 'application/x-www-form-urlencoded' );
+            proxyReq.setHeader( 'content-length', body.length );
+
+            // Write out body changes to the proxyReq stream
+            proxyReq.write( body );
+            proxyReq.end();
         }
-    };
-    
-    // Proxy configuration
-    var proxy = ProxyMiddleware( proxy_filter, proxy_options );
-    
-    /* GET home page. */
-    router.get('/', function(req, res, next) {
-        res.render('index', { title: 'Node.js Express Proxy Test' });
-    });
-    
-    router.all('/docs', proxy );
-    
-    module.exports = router;
+    }
+};
+
+// Proxy configuration
+var proxy = ProxyMiddleware( proxy_filter, proxy_options );
+
+/* GET home page. */
+router.get('/', function(req, res, next) {
+    res.render('index', { title: 'Node.js Express Proxy Test' });
+});
+
+router.all('/docs', proxy );
+
+module.exports = router;
+```