add wilcard middleware

Author: felicienfrancois

examples/wildcard.js

@@ -0,0 +1,17 @@
+'use strict';
+
+var port = 8081;
+
+var Proxy = require('../');
+var proxy = Proxy();
+
+proxy.use(Proxy.wildcard);
+
+proxy.onError(function(ctx, err, errorKind) {
+  // ctx may be null
+  var url = (ctx && ctx.clientToProxyRequest) ? ctx.clientToProxyRequest.url : '';
+  console.error(errorKind + ' on ' + url + ':', err);
+});
+
+proxy.listen({ port: port });
+console.log('listening on ' + port);

lib/middleware/wildcard.js

@@ -0,0 +1,18 @@
+'use strict';
+
+module.exports = {
+   
+  onCertificateRequired: function (hostname, callback) {
+    var self = this;
+    var wildcardHost = hostname.replace(/^(.+)(\.[^\.]{4,}(\.[^\.]{1,3})*\.[^\.]+)$/, function(match, group1, group2) {
+      return group1.replace(/[^\.]+/g, '*') + group2;
+    });
+    var fileName = wildcardHost.replace(/\*/g, '_');
+    return callback(null, {
+      keyFile: self.sslCaDir + '/keys/' + fileName + '.key',
+      certFile: self.sslCaDir + '/certs/' + fileName + '.pem',
+      hosts: [wildcardHost]
+    });
+    return this;
+  }
+};

lib/proxy.js

@@ -21,6 +21,7 @@ module.exports = function() {
 
 
 module.exports.gunzip = require('./middleware/gunzip');
+module.exports.wildcard = require('./middleware/wildcard');
 
 var Proxy = function() {
   this.onRequestHandlers = [];