Added possibility to use reroutes

README.md

@@ -59,6 +59,8 @@ This will install `http-server` globally so that it may be run from the command
 
 `-r` or `--robots` Provide a /robots.txt (whose content defaults to 'User-agent: *\nDisallow: /')
 
+`-R` or `--reroute` Reroute file. json array with objects containing `match`, `replace`, `abortOnMatch` [`true`], match should contain two keys: `regexp` (regexp string) and `flags` (string with flags)
+
 `-h` or `--help` Print this list and exit.
 
 # Development

bin/http-server

@@ -7,6 +7,7 @@ var colors     = require('colors/safe'),
     httpServer = require('../lib/http-server'),
     portfinder = require('portfinder'),
     opener     = require('opener'),
+    fs         = require('fs'),
     argv       = require('optimist')
       .boolean('cors')
       .argv;
@@ -39,6 +40,8 @@ if (argv.h || argv.help) {
     '  -K --key     Path to ssl key file (default: key.pem).',
     '',
     '  -r --robots  Respond to /robots.txt [User-agent: *\\nDisallow: /]',
+    '  -R --reroute Reroute file. json array with objects containing match, replace, abortOnMatch[true]',
+    '                  match should contain two keys: regexp (regexp string) and flags (string with flags)',
     '  -h --help    Print this list and exit.'
   ].join('\n'));
   process.exit();
@@ -49,6 +52,7 @@ var port = argv.p || parseInt(process.env.PORT, 10),
     ssl = !!argv.S || !!argv.ssl,
     proxy = argv.P || argv.proxy,
     utc = argv.U || argv.utc,
+    reroutes,
     logger;
 
 if (!argv.s && !argv.silent) {
@@ -70,6 +74,10 @@ if (!argv.s && !argv.silent) {
           req.headers['user-agent']
         );
       }
+    },
+    reroute: function (prevUrl, newUrl) {
+      var date = utc ? new Date().toUTCString() : new Date();
+      logger.info('[%s] Rerouted "%s" to "%s"', date, colors.cyan(prevUrl), colors.cyan(newUrl));
     }
   };
 }
@@ -91,6 +99,27 @@ else {
   listen(port);
 }
 
+if (argv.R || argv.reroute) {
+  reroutes = JSON.parse(fs.readFileSync(argv.R || argv.reroute));
+  if (!Array.isArray(reroutes)) {
+    throw new Error('Reroute file must be an array.');
+  }
+  reroutes.forEach(function (elem) {
+    if (elem.match && elem.replace) {
+      elem.match = new RegExp(elem.match.regexp, elem.match.flags || '');
+      if (elem.replace.charAt(0) !== '/' && !argv.s && !argv.silent) {
+        logger.info(colors.red("URL:s not starting with slash won't be found: " + elem.replace));
+      }
+    }
+    else {
+      throw new Error('Each reroute must have the match key and replace key');
+    }
+    if (typeof elem.abortOnMatch === 'undefined') {
+      elem.abortOnMatch = true;
+    }
+  });
+}
+
 function listen(port) {
   var options = {
     root: argv._[0],
@@ -101,7 +130,9 @@ function listen(port) {
     robots: argv.r || argv.robots,
     ext: argv.e || argv.ext,
     logFn: logger.request,
-    proxy: proxy
+    logReroute: logger.reroute,
+    proxy: proxy,
+    reroutes: reroutes
   };
 
   if (argv.cors) {

lib/http-server.js

@@ -57,6 +57,25 @@ function HttpServer(options) {
 
   var before = options.before ? options.before.slice() : [];
 
+  if (options.reroutes) {
+    before.push(function (req, res) {
+      for (var i = 0; i < options.reroutes.length; i++) {
+        var reroute = options.reroutes[i];
+        var prevUrl = req.url;
+        req.url = req.url.replace(reroute.match, reroute.replace);
+        if (prevUrl !== req.url) {
+          if (options.logReroute) {
+            options.logReroute(prevUrl, req.url);
+          }
+          if (reroute.abortOnMatch) {
+            break;
+          }
+        }
+      }
+      res.emit('next');
+    });
+  }
+
   before.push(function (req, res) {
     if (options.logFn) {
       options.logFn(req, res);

public/index.html

@@ -7,6 +7,9 @@
     <h1>Serving up static files like they were turtles strapped to rockets.</h1>
 
     <img src="./img/turtle.png"/>
+
+    <h2>Tip: try adding -R public/reroutes.json to the command and see what happens to the turtle image!</h2>
+    <p>You might have to hit ctrl+f5 to refresh the page</p>
   </body>
 </html>
 

public/reroutes.json

@@ -0,0 +1,6 @@
+[
+  {
+    "match": {"regexp":"/img/([a-z]+).png", "flags":"i"},
+    "replace": "/img/$1_reroute.png"
+  }
+]