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Coverage for /Users/yunong/workspace/node-restify/lib/server.js : 90%

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  // Copyright 2012 Mark Cavage, Inc.  All rights reserved.
  
  var domain = require('domain');
  var EventEmitter = require('events').EventEmitter;
  var http = require('http');
  var https = require('https');
  var util = require('util');
  
  var assert = require('assert-plus');
  var mime = require('mime');
  var once = require('once');
  var spdy = require('spdy');
  var uuid = require('node-uuid');
  
  var dtrace = require('./dtrace');
  var errors = require('./errors');
  var formatters = require('./formatters');
  var shallowCopy = require('./utils').shallowCopy;
  var upgrade = require('./upgrade');
  
  var semver = require('semver');
  var maxSatisfying = semver.maxSatisfying;
  
  // Ensure these are loaded
  require('./request');
  require('./response');
  
  
  ///--- Globals
  
  var sprintf = util.format;
  
  var ResourceNotFoundError = errors.ResourceNotFoundError;
  
  var PROXY_EVENTS = [
      'clientError',
      'close',
      'connection',
      'error',
      'listening',
      'secureConnection'
  ];
  
  
  ///--- Helpers
  
  function argumentsToChain(args, start) {
      assert.ok(args);
  
      args = Array.prototype.slice.call(args, start);
  
      if (args.length < 0)
          throw new TypeError('handler (function) required');
  
      var chain = [];
  
      function process(handlers) {
          for (var i = 0; i < handlers.length; i++) {
              if (Array.isArray(handlers[i])) {
                  process(handlers[i], 0);
              } else {
                  assert.func(handlers[i], 'handler');
                  chain.push(handlers[i]);
              }
          }
  
          return (chain);
      }
  
      return (process(args));
  }
  
  
  function mergeFormatters(fmt) {
      var arr = [];
      var defaults = Object.keys(formatters).length;
      var i = 0;
      var obj = {};
  
      function addFormatter(src, k) {
          assert.func(src[k], 'formatter');
  
          var q;
          var t = k;
          if (k.indexOf(';') !== -1) {
              /* JSSTYLED */
              var tmp = k.split(/\s*;\s*/);
              t = tmp[0];
              if (tmp[1].indexOf('q=') !== -1) {
                  q = parseFloat(tmp[1].split('=')[1]) * 10;
              }
          }
  
          if (k.indexOf('/') === -1)
              k = mime.lookup(k);
  
          obj[t] = src[k];
          arr.push({
              q: q || (i + defaults),
              t: t
          });
          i++;
      }
  
      Object.keys(formatters).forEach(addFormatter.bind(this, formatters));
      Object.keys(fmt || {}).forEach(addFormatter.bind(this, fmt || {}));
  
      arr = arr.sort(function (a, b) {
          return (b.q - a.q);
      }).map(function (a) {
              return (a.t);
          });
  
      return ({
          formatters: obj,
          acceptable: arr
      });
  }
  
  
  function ifError(n) {
      function _ifError(err) {
          if (err) {
              err._restify_next = n;
              throw err;
          }
      }
  
      return (_ifError);
  }
  
  
  function emitRouteError(server, req, res, err) {
      var name;
      if (err.name === 'ResourceNotFoundError') {
          name = 'NotFound';
      } else if (err.name === 'InvalidVersionError') {
          name = 'VersionNotAllowed';
      } else {
          name = err.name.replace(/Error$/, '');
      }
  
      req.log.trace({name: name, err: err}, 'entering emitRouteError');
      if (server.listeners(name).length > 0) {
          server.emit(name, req, res, err, once(function () {
              server.emit('after', req, res, null);
          }));
      } else {
          res.send(err);
          server.emit('after', req, res, null);
      }
  }
  
  
  function optionsError(err, req, res) {
      var code = err.statusCode;
      var ok = false;
  
      if (code === 404 && req.method === 'OPTIONS' && req.url === '*') {
          res.send(200);
          ok = true;
      }
  
      return (ok);
  }
  
  
  ///--- API
  
  function Server(options) {
      assert.object(options, 'options');
      assert.object(options.log, 'options.log');
      assert.object(options.router, 'options.router');
  
      var self = this;
  
      EventEmitter.call(this);
  
      this.before = [];
      this.chain = [];
      this.log = options.log;
      this.name = options.name || 'restify';
      this.router = options.router;
      this.routes = {};
      this.secure = false;
      this.versions = options.versions || options.version || [];
      this.socketio = options.socketio || false;
  
      var fmt = mergeFormatters(options.formatters);
      this.acceptable = fmt.acceptable;
      this.formatters = fmt.formatters;
  
      if (options.spdy) {
          this.spdy = true;
          this.server = spdy.createServer(options.spdy);
      } else if ((options.cert || options.certificate) && options.key) {
          this.ca = options.ca;
          this.certificate = options.certificate || options.cert;
          this.key = options.key;
          this.passphrase = options.passphrase || null;
          this.secure = true;
  
          this.server = https.createServer({
              ca: self.ca,
              cert: self.certificate,
              key: self.key,
              passphrase: self.passphrase,
              rejectUnauthorized: options.rejectUnauthorized,
              requestCert: options.requestCert,
              ciphers: options.ciphers
          });
      } else if (options.httpsServerOptions) {
          this.server = https.createServer(options.httpsServerOptions);
      } else {
          this.server = http.createServer();
      }
  
      this.router.on('mount', this.emit.bind(this, 'mount'));
  
      if (!options.handleUpgrades && PROXY_EVENTS.indexOf('upgrade') === -1)
          PROXY_EVENTS.push('upgrade');
      PROXY_EVENTS.forEach(function (e) {
          self.server.on(e, self.emit.bind(self, e));
      });
  
      // Now the things we can't blindly proxy
      this.server.on('checkContinue', function onCheckContinue(req, res) {
          if (self.listeners('checkContinue').length > 0) {
              self.emit('checkContinue', req, res);
              return;
          }
  
          if (!options.noWriteContinue)
              res.writeContinue();
  
          self._setupRequest(req, res);
          self._handle(req, res, true);
      });
  
      if (options.handleUpgrades) {
          this.server.on('upgrade', function onUpgrade(req, socket, head) {
              req._upgradeRequest = true;
              var res = upgrade.createResponse(req, socket, head);
              self._setupRequest(req, res);
              self._handle(req, res);
          });
      }
  
      this.server.on('request', function onRequest(req, res) {
          self.emit('request', req, res);
          if (options.socketio && (/^\/socket\.io.*/).test(req.url))
               return;
  
          self._setupRequest(req, res);
          self._handle(req, res);
      });
  
      this.__defineGetter__('maxHeadersCount', function () {
          return (self.server.maxHeadersCount);
      });
  
      this.__defineSetter__('maxHeadersCount', function (c) {
          self.server.maxHeadersCount = c;
          return (c);
      });
  
      this.__defineGetter__('url', function () {
          if (self.socketPath)
              return ('http://' + self.socketPath);
  
          var addr = self.address();
          var str = '';
          if (self.spdy) {
              str += 'spdy://';
          } else if (self.secure) {
              str += 'https://';
          } else {
              str += 'http://';
          }
  
          if (addr) {
              str += addr.family === 'IPv6' ?
                  '[' + addr.address + ']' : addr.address;
              str += ':';
              str += addr.port;
          } else {
              str += '169.254.0.1:0000';
          }
  
          return (str);
      });
  }
  util.inherits(Server, EventEmitter);
  module.exports = Server;
  
  
  Server.prototype.address = function address() {
      return (this.server.address());
  };
  
  /**
   * Gets the server up and listening.
   *
   * You can call like:
   *  server.listen(80)
   *  server.listen(80, '127.0.0.1')
   *  server.listen('/tmp/server.sock')
   *
   * @param {Function} callback optionally get notified when listening.
   * @throws {TypeError} on bad input.
   */
  Server.prototype.listen = function listen() {
      var args = Array.prototype.slice.call(arguments);
      return (this.server.listen.apply(this.server, args));
  };
  
  
  /**
   * Shuts down this server, and invokes callback (optionally) when done.
   *
   * @param {Function} callback optional callback to invoke when done.
   */
  Server.prototype.close = function close(callback) {
      if (callback)
          assert.func(callback, 'callback');
  
      this.server.once('close', function onClose() {
          return (callback ? callback() : false);
      });
  
      return (this.server.close());
  };
  
  
  // Register all the routing methods
  /**
   * Mounts a chain on the given path against this HTTP verb
   *
   * @param {Object} options the URL to handle, at minimum.
   * @return {Route} the newly created route.
   */
  [
      'del',
      'get',
      'head',
      'opts',
      'post',
      'put',
      'patch'
  ].forEach(function (method) {
          Server.prototype[method] = function (opts) {
              if (opts instanceof RegExp || typeof (opts) === 'string') {
                  opts = {
                      path: opts
                  };
              } else if (typeof (opts) === 'object') {
                  opts = shallowCopy(opts);
              } else {
                  throw new TypeError('path (string) required');
              }
  
              if (arguments.length < 2)
                  throw new TypeError('handler (function) required');
  
              var chain = [];
              var route;
              var self = this;
  
              function addHandler(h) {
                  assert.func(h, 'handler');
  
                  chain.push(h);
              }
  
              if (method === 'del')
                  method = 'DELETE';
              if (method === 'opts')
                  method = 'OPTIONS';
              opts.method = method.toUpperCase();
              opts.versions = opts.versions || opts.version || self.versions;
              if (!Array.isArray(opts.versions))
                  opts.versions = [opts.versions];
  
              if (!opts.name) {
                  opts.name = method + '-' + (opts.path || opts.url);
                  if (opts.versions.length > 0) {
                      opts.name += '-' + opts.versions.join('--');
                  }
  
                  opts.name = opts.name.replace(/\W/g, '').toLowerCase();
                  if (this.router.mounts[opts.name]) // GH-401
                      opts.name += uuid.v4().substr(0, 7);
              } else {
                  opts.name = opts.name.replace(/\W/g, '').toLowerCase();
              }
  
  
              if (!(route = this.router.mount(opts)))
                  return (false);
  
              this.chain.forEach(addHandler);
              argumentsToChain(arguments, 1).forEach(addHandler);
              this.routes[route] = chain;
  
              return (route);
          };
      });
  
  
  /**
   * Minimal port of the functionality offered by Express.js Route Param
   * Pre-conditions
   * @link http://expressjs.com/guide.html#route-param%20pre-conditions
   *
   * This basically piggy-backs on the `server.use` method. It attaches a
   * new middleware function that only fires if the specified parameter exists
   * in req.params
   *
   * Exposes an API:
   *   server.param("user", function (req, res, next) {
   *     // load the user's information here, always making sure to call next()
   *   });
   *
   * @param {String} The name of the URL param to respond to
   * @param {Function} The middleware function to execute
   */
  Server.prototype.param = function param(name, fn) {
      this.use(function _param(req, res, next) {
          if (req.params && req.params[name]) {
              fn.call(this, req, res, next, req.params[name], name);
          } else {
              next();
          }
      });
  
      return (this);
  };
  
  
  /**
   * Piggy-backs on the `server.use` method. It attaches a new middleware
   * function that only fires if the specified version matchtes the request.
   *
   * Note that if the client does not request a specific version, the middleware
   * function always fires. If you don't want this set a default version with a
   * pre handler on requests where the client omits one.
   *
   * Exposes an API:
   *   server.versionedUse("version", function (req, res, next, ver) {
   *     // do stuff that only applies to routes of this API version
   *   });
   *
   * @param {String|Array} The version or versions of the URL to respond to
   * @param {Function} The middleware function to execute, the fourth parameter
   *                   will be the selected version
   */
  Server.prototype.versionedUse = function versionedUse(versions, fn) {
      if (!Array.isArray(versions))
          versions = [versions];
      assert.arrayOfString(versions, 'versions');
  
      versions.forEach(function (v) {
          if (!semver.valid(v))
              throw new TypeError('%s is not a valid semver', v);
      });
  
      this.use(function _versionedUse(req, res, next) {
          var ver;
          if (req.version() === '*' ||
              (ver = maxSatisfying(versions,
                  req.version()) || false)) {
              fn.call(this, req, res, next, ver);
          } else {
              next();
          }
      });
  
      return (this);
  };
  
  
  /**
   * Removes a route from the server.
   *
   * You  pass in the route 'blob' you got from a mount call.
   *
   * @param {String} name the route name.
   * @return {Boolean} true if route was removed, false if not.
   * @throws {TypeError} on bad input.
   */
  Server.prototype.rm = function rm(route) {
      var r = this.router.unmount(route);
      if (r && this.routes[r])
          delete this.routes[r];
  
      return (r);
  };
  
  
  /**
   * Installs a list of handlers to run _before_ the "normal" handlers of all
   * routes.
   *
   * You can pass in any combination of functions or array of functions.
   *
   * @throws {TypeError} on input error.
   */
  Server.prototype.use = function use() {
      var self = this;
  
      (argumentsToChain(arguments) || []).forEach(function (h) {
          self.chain.push(h);
      });
  
      return (this);
  };
  
  
  /**
   * Gives you hooks to run _before_ any routes are located.  This gives you
   * a chance to intercept the request and change headers, etc., that routing
   * depends on.  Note that req.params will _not_ be set yet.
   */
  Server.prototype.pre = function pre() {
      var self = this;
  
      argumentsToChain(arguments).forEach(function (h) {
          self.before.push(h);
      });
  
      return (this);
  };
  
  
  Server.prototype.toString = function toString() {
      var LINE_FMT = '\t%s: %s\n';
      var SUB_LINE_FMT = '\t\t%s: %s\n';
      var self = this;
      var str = '';
  
      function handlersToString(arr) {
          var s = '[' + arr.map(function (b) {
              return (b.name || 'function');
          }).join(', ') + ']';
  
          return (s);
      }
  
      str += sprintf(LINE_FMT, 'Accepts', this.acceptable.join(', '));
      str += sprintf(LINE_FMT, 'Name', this.name);
      str += sprintf(LINE_FMT, 'Pre', handlersToString(this.before));
      str += sprintf(LINE_FMT, 'Router', this.router.toString());
      str += sprintf(LINE_FMT, 'Routes', '');
      Object.keys(this.routes).forEach(function (k) {
          var handlers = handlersToString(self.routes[k]);
          str += sprintf(SUB_LINE_FMT, k, handlers);
      });
      str += sprintf(LINE_FMT, 'Secure', this.secure);
      str += sprintf(LINE_FMT, 'Url', this.url);
      str += sprintf(LINE_FMT, 'Version', this.versions.join());
  
      return (str);
  };
  
  
  ///--- Private methods
  
  Server.prototype._handle = function _handle(req, res) {
      var self = this;
  
      function routeAndRun() {
          self._route(req, res, function (route, context) {
              req.context = req.params = context;
              req.route = route.spec;
  
              var r = route ? route.name : null;
              var chain = self.routes[r];
  
              self._run(req, res, route, chain, function done(e) {
                  self.emit('after', req, res, route, e);
              });
          });
      }
  
      if (this.before.length > 0) {
          this._run(req, res, null, this.before, function (err) {
              if (!err) {
                  routeAndRun();
              }
          });
      } else {
          routeAndRun();
      }
  };
  
  
  Server.prototype._route = function _route(req, res, name, cb) {
      var self = this;
  
      if (typeof (name) === 'function') {
          cb = name;
          name = null;
  
          this.router.find(req, res, function onRoute(err, route, ctx) {
              var r = route ? route.name : null;
              if (err) {
                  if (optionsError(err, req, res)) {
                      self.emit('after', req, res, err);
                  } else {
                      emitRouteError(self, req, res, err);
                  }
              } else if (r === 'preflight') {
                  res.writeHead(200);
                  res.end();
                  self.emit('after', req, res, null);
              } else if (!r || !self.routes[r]) {
                  err = new ResourceNotFoundError(req.path());
                  emitRouteError(self, res, res, err);
              } else {
                  cb(route, ctx);
              }
          });
      } else {
          this.router.get(name, req, function (err, route, ctx) {
              if (err) {
                  emitRouteError(self, req, res, err);
              } else {
                  cb(route, ctx);
              }
          });
      }
  };
  
  
  // The goofy checks in next() are to make sure we fire the DTrace
  // probes after an error might have been sent, as in a handler
  // return next(new Error) is basically shorthand for sending an
  // error via res.send(), so we do that before firing the dtrace
  // probe (namely so the status codes get updated in the
  // response).
  //
  // Callers can stop the chain from proceding if they do
  // return next(false); This is useful for non-errors, but where
  // a response was sent and you don't want the chain to keep
  // going
  Server.prototype._run = function _run(req, res, route, chain, cb) {
      var d;
      var i = -1;
      var id = dtrace.nextId();
      req._dtraceId = id;
      if (!req._anonFuncCount) {
          // Counter used to keep track of anonymous functions. Used when a
          // handler function is anonymous. This ensures we're using a
          // monotonically increasing int for anonymous handlers through out the
          // the lifetime of this request
          req._anonFuncCount = 0;
      }
      var log = this.log;
      var self = this;
      var handlerName = null;
      var errName;
      var emittedError = false;
      if (cb)
          cb = once(cb);
  
      function next(arg) {
          var done = false;
          if (arg) {
              if (arg instanceof Error) {
                  errName = arg.name.replace(/Error$/, '');
                  log.trace({err: arg, errName: errName}, 'next(err=%s)',
                      (arg.name || 'Error'));
                  if (self.listeners(errName).length > 0) {
                      self.emit(errName, req, res, arg, once(function () {
                          res.send(arg);
                          return (cb ? cb(arg) : true);
                      }));
                      emittedError = true;
                  } else {
                      res.send(arg);
                  }
                  done = true;
              } else if (typeof (arg) === 'string') { // GH-193, allow redirect
                  if (req._rstfy_chained_route) {
                      var _e = new errors.InternalError();
                      log.error({
                          err: _e
                      }, 'Multiple next("chain") calls not ' +
                          'supported');
                      res.send(_e);
                      return (false);
                  }
  
                  // Stop running the rest of this route since we're redirecting
                  return self._route(req, res, arg, function (r, ctx) {
                      req.context = req.params = ctx;
                      req.route = r.spec;
  
                      var _c = chain.slice(0, i + 1);
  
                      function _uniq(fn) {
                          return (_c.indexOf(fn) === -1);
                      }
  
                      var _routes = self.routes[r.name] || [];
                      var _chain = _routes.filter(_uniq);
  
                      req._rstfy_chained_route = true;
                      // Need to fire DTrace done for previous handler here too.
                      if ((i + 1) > 0 && chain[i] && !chain[i]._skip) {
                          req.endHandlerTimer(handlerName);
                      }
                      self._run(req, res, r, _chain, cb);
                  });
              }
          }
  
          if (arg === false)
              done = true;
  
          // Fire DTrace done for the previous handler.
          if ((i + 1) > 0 && chain[i] && !chain[i]._skip) {
              req.endHandlerTimer(handlerName);
          }
  
          // Run the next handler up
          if (!done && chain[++i]) {
              if (chain[i]._skip)
                  return (next());
  
              if (log.trace())
                  log.trace('running %s', chain[i].name || '?');
  
              req._currentRoute = (route !== null ? route.name : 'pre');
              handlerName = (chain[i].name ||
                             ('handler-' + req._anonFuncCount++));
              req._currentHandler = handlerName;
              req.startHandlerTimer(handlerName);
  
              var n = once(next);
              n.ifError = ifError(n);
              return (chain[i].call(self, req, res, n));
          }
  
          dtrace._rstfy_probes['route-done'].fire(function () {
              return ([
                  self.name,
                  route !== null ? route.name : 'pre',
                  id,
                  res.statusCode || 200,
                  res.headers()
              ]);
          });
  
          if (route === null) {
              self.emit('preDone', req, res);
          } else {
              self.emit('done', req, res, route);
          }
  
          // Don't return cb here if we emit an error since we will cb after the
          // handler fires.
          if (!emittedError) {
              return (cb ? cb(arg) : true);
          } else {
              return (true);
          }
      }
  
      var n1 = once(next);
      n1.ifError = ifError(n1);
  
      dtrace._rstfy_probes['route-start'].fire(function () {
          return ([
              self.name,
              route !== null ? route.name : 'pre',
              id,
              req.method,
              req.href(),
              req.headers
          ]);
      });
  
      d = domain.create();
      d.add(req);
      d.add(res);
      d.on('error', function onError(err) {
          if (err._restify_next) {
              err._restify_next(err);
          } else {
              log.trace({err: err}, 'uncaughtException');
              self.emit('uncaughtException', req, res, route, err);
          }
      });
      d.run(n1);
  };
  
  
  Server.prototype._setupRequest = function _setupRequest(req, res) {
      req.log = res.log = this.log;
      req._time = res._time = Date.now();
      req.serverName = this.name;
  
      res.acceptable = this.acceptable;
      res.formatters = this.formatters;
      res.req = req;
      res.serverName = this.name;
      res.version = this.router.versions[this.router.versions.length - 1];
  };
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