implemented HTTP 301 redirect with glob matching

bin/goldilocks.js

@@ -155,7 +155,7 @@ function readConfigAndRun(args) {
 
         if (ports.length === 0) {
           // I don't think we want to prevent the rest of the app from running in
-          // this case like we do for TCP, do don't call reject.
+          // this case like we do for TCP, so don't call reject.
           console.warn('could not bind to the desired ports for DNS');
           Object.keys(failed).forEach(function (key) {
             console.log('[error bind]', key, failed[key].code);

goldilocks.example.yml

@@ -22,6 +22,12 @@ http:
   allow_insecure: false
   primary_domain: localhost.foo.daplie.me
   modules:
+    - name: redirect
+      domains:
+        - localhost.beta.daplie.me
+      status: 301
+      from: /old/path/*/other/*
+      to: /path/new/:2/something/:1
     - name: proxy
       domains:
         - localhost.daplie.me

lib/domain-utils.js

@@ -0,0 +1,30 @@
+'use strict';
+
+module.exports.match = function (pattern, domainname) {
+  // Everything matches '*'
+  if (pattern === '*') {
+    return true;
+  }
+
+  if (/^\*./.test(pattern)) {
+    // get rid of the leading "*." to more easily check the servername against it
+    pattern = pattern.slice(2);
+    return pattern === domainname.slice(-pattern.length);
+  }
+
+  // pattern doesn't contains any wildcards, so exact match is required
+  return pattern === domainname;
+};
+
+module.exports.separatePort = function (fullHost) {
+  var match = /^(.*?)(:\d+)?$/.exec(fullHost);
+
+  if (match[2]) {
+    match[2] = match[2].replace(':', '');
+  }
+
+  return {
+    host: match[1]
+  , port: match[2]
+  };
+};

lib/match-domain.js

@@ -1,17 +0,0 @@
-'use strict';
-
-module.exports.match = function (pattern, servername) {
-  // Everything matches '*'
-  if (pattern === '*') {
-    return true;
-  }
-
-  if (/^\*./.test(pattern)) {
-    // get rid of the leading "*." to more easily check the servername against it
-    pattern = pattern.slice(2);
-    return pattern === servername.slice(-pattern.length);
-  }
-
-  // pattern doesn't contains any wildcards, so exact match is required
-  return pattern === servername;
-};

lib/modules/http.js

@@ -4,7 +4,8 @@ module.exports.create = function (deps, conf, greenlockMiddleware) {
   var express = require('express');
   var app = express();
   var adminApp = require('./admin').create(deps, conf);
-  var domainMatches = require('../match-domain').match;
+  var domainMatches = require('../domain-utils').match;
+  var separatePort = require('../domain-utils').separatePort;
   var proxyRoutes = [];
 
   var adminDomains = [
@@ -14,8 +15,16 @@ module.exports.create = function (deps, conf, greenlockMiddleware) {
   , /\balpha\.localhost\./
   ];
 
+  function moduleMatchesHost(req, mod) {
+    var host = separatePort(req.headers.host).host;
+
+    return mod.domains.some(function (pattern) {
+      return domainMatches(pattern, host);
+    });
+  }
+
   function verifyHost(fullHost) {
-    var host = /^(.*?)(:\d+)?$/.exec(fullHost)[1];
+    var host = separatePort(fullHost).host;
 
     if (host === 'localhost') {
       return fullHost.replace(host, 'localhost.daplie.me');
@@ -50,7 +59,7 @@ module.exports.create = function (deps, conf, greenlockMiddleware) {
       return;
     }
 
-    var port = (/:(\d+)$/.exec(req.headers.host) || [])[1];
+    var port = separatePort(req.headers.host).port;
     if (!redirecters[port]) {
       redirecters[port] = require('redirect-https')({
         port: port
@@ -115,24 +124,14 @@ module.exports.create = function (deps, conf, greenlockMiddleware) {
 
     return {
       web: function (req, res, next) {
-        var hostname = req.headers.host.split(':')[0];
-        var relevant = mod.domains.some(function (pattern) {
-          return domainMatches(pattern, hostname);
-        });
-
-        if (relevant) {
+        if (moduleMatchesHost(req, mod)) {
           proxy.web(req, res);
         } else {
           next();
         }
       }
     , ws: function (req, socket, head, next) {
-        var hostname = req.headers.host.split(':')[0];
-        var relevant = mod.domains.some(function (pattern) {
-          return domainMatches(pattern, hostname);
-        });
-
-        if (relevant) {
+        if (moduleMatchesHost(req, mod)) {
           proxy.ws(req, socket, head);
         } else {
           next();
@@ -141,6 +140,36 @@ module.exports.create = function (deps, conf, greenlockMiddleware) {
     };
   }
 
+  function createRedirectRoute(mod) {
+    // Escape any characters that (can) have special meaning in regular expression
+    // but that aren't the special characters we have interest in.
+    var from = mod.from.replace(/[-\/\\^$+?.()|[\]{}]/g, '\\$&');
+    // Then modify the characters we are interested in so they do what we want in
+    // the regular expression after being compiled.
+    from = from.replace(/\*/g, '(.*)');
+    var fromRe = new RegExp('^' + from + '/?$');
+
+    return function (req, res, next) {
+      if (!moduleMatchesHost(req, mod)) {
+        next();
+        return;
+      }
+
+      var match = fromRe.exec(req.url);
+      if (!match) {
+        next();
+        return;
+      }
+
+      var to = mod.to;
+      match.slice(1).forEach(function (globMatch, index) {
+        to = to.replace(':'+(index+1), globMatch);
+      });
+      res.writeHead(mod.status, { 'Location': to });
+      res.end();
+    };
+  }
+
   function createStaticRoute(mod) {
     var getStaticApp, staticApp;
     if (/:hostname/.test(mod.root)) {
@@ -160,13 +189,8 @@ module.exports.create = function (deps, conf, greenlockMiddleware) {
     }
 
     return function (req, res, next) {
-      var hostname = req.headers.host.split(':')[0];
-      var relevant = mod.domains.some(function (pattern) {
-        return domainMatches(pattern, hostname);
-      });
-
-      if (relevant) {
-        getStaticApp(hostname)(req, res, next);
+      if (moduleMatchesHost(req, mod)) {
+        getStaticApp(separatePort(req.headers.host).host)(req, res, next);
       } else {
         next();
       }
@@ -183,6 +207,9 @@ module.exports.create = function (deps, conf, greenlockMiddleware) {
       proxyRoutes.push(proxyRoute);
       app.use(proxyRoute.web);
     }
+    else if (mod.name === 'redirect') {
+      app.use(createRedirectRoute(mod));
+    }
     else if (mod.name === 'static') {
       app.use(createStaticRoute(mod));
     }

lib/modules/tls.js

@@ -5,7 +5,7 @@ module.exports.create = function (deps, config, netHandler) {
   var parseSni = require('sni');
   var greenlock = require('greenlock');
   var localhostCerts = require('localhost.daplie.me-certificates');
-  var domainMatches = require('../match-domain').match;
+  var domainMatches = require('../domain-utils').match;
 
   function extractSocketProp(socket, propName) {
     // remoteAddress, remotePort... ugh... https://github.com/nodejs/node/issues/8854