kibana去掉丑陋的basic验证框，用自定义验证代替。

最近在改写kibana，碰到了验证登录的问题。问题是这样子的，nginx设置了basic认证，然后客户端访问kibana的时候总是会弹出登录框，输入用户名和密码，现在要改写这个登陆框，用bootstrap来模拟一下登录验证。

最终效果：

解决方案：首先看到请求的返回status是401，也就是未授权，可以自己百度一下 `basic authentication`。我们需要在node端把401的错误码改成其他的，我这里改成了403。红色部分是我后来加上的，文件路径: `src/server/plugins/elasticsearch/lib/create_proxy.js`。这样就不会弹出难看的认证框了。

var createAgent = require('./create_agent');
var mapUri = require('./map_uri');
module.exports = function createProxy(server, method, route, opts) {
  opts = opts || {};
  var options = {
    method: method,
    path: route,
    handler: {
      proxy: {
        mapUri: mapUri(server, opts.prefix),
        passThrough: true,
        agent: createAgent(server),
        onResponse:function(err, res, request, reply, settings, ttl){
          if(res.statusCode==401){
            res.statusCode =403;
          }
          reply(res);
        }
      }
    }
  };
  if (opts && opts.config) options.config = opts.config;
  server.route(options);
};

解决了nodejs端的状态码问题，现在该处理前端的展示方面了。

看了kibana源码，这里引用了angularjs，那就好办了，我们可以利用$httpProvider这个服务来写一个拦截器。然后在request的时候，把本地存储的用户名和密码写到header中去，就模拟了basic验证。文件路径：src/kibana/plugins/kibana/index.js

// ensure that the kibana module requires ui.bootstrap
require('modules')
.get('kibana', ['ui.bootstrap','ngCookies'])
.config(function ($tooltipProvider) {
  $tooltipProvider.setTriggers({ 'mouseenter': 'mouseleave click' });
})
.factory('HttpInterceptorFactory', ['$rootScope', '$cookieStore', '$q', function ($rootScope, $cookieStore, $q) {
      return {
          'request': function (httpConfig) {
              var up = $cookieStore.get('usernameandpassword');

              up && (httpConfig.headers.Authorization = "Basic " + up);

              return httpConfig;
          }
      };
  }])
.config(['$httpProvider', function ($httpProvider) {
      $httpProvider.interceptors.push('HttpInterceptorFactory');
  }])
.controller('LoginController',function($scope,$cookieStore,$modalInstance){
  $scope.username="";
  $scope.password="";  
  $scope.ok = function (user,psw) {
    $cookieStore.put("usernameandpassword", btoa(user +":"+psw));
    location.reload();
  };
})
.directive('kibana', function (Private, $rootScope,$timeout, $cookieStore,$injector, Promise, config, kbnSetup,$modal) {
  return {
    template: require('text!plugins/kibana/kibana.html'),
    controllerAs: 'kibana',
    controller: function ($scope) {
      var _ = require('lodash');
      var self = $rootScope.kibana = this;
      var notify = new Notifier({ location: 'Kibana' });

      // this is the only way to handle uncaught route.resolve errors
      $rootScope.$on('$routeChangeError', function (event, next, prev, err) {
        if(err.origError.status==403){
          // location.hash="#/passport/login";
          self.doLogin();
          return;
        }
        notify.fatal(err);
      });

      self.doLogin = function(){
        var modalInstance = $modal.open({
            template: require('text!plugins/kibana/login.html'),
            controller: 'LoginController',
            size: 'sm',
            backdrop:'static'
          });
         modalInstance.result.then(function (selectedItem) {

          }, function () {
            $log.info('Modal dismissed at: ' + new Date());
          });
      }

      // run init functions before loading the mixins, so that we can ensure that
      // the environment is ready for them to get and use their dependencies
      self.ready = Promise.all([ kbnSetup(), config.init() ])
      .then(function () {
        // load some "mixins"
        var mixinLocals = { $scope: $scope, notify: notify };
        $injector.invoke(require('plugins/kibana/_init'), self, mixinLocals);
        $injector.invoke(require('plugins/kibana/_apps'), self, mixinLocals);
        $injector.invoke(require('plugins/kibana/_timepicker'), self, mixinLocals);

        $scope.setupComplete = true;
      });
    }
  };
});

<div class="modal-header">
            <h3 class="modal-title">Login In</h3>
        </div>

        <div class="modal-body">
            <div class="form-group">
                <label >Username</label>
                <input style="border:1px solid;" type="text" ng-model="username" class="form-control" placeholder="Username">
              </div>
              <div class="form-group">
                <label >Password</label>
                <input style="border:1px solid;" type="password" ng-model="password" class="form-control" placeholder="Password">
              </div>
        </div>
        <div class="modal-footer">
            <button class="btn btn-primary" ng-click="ok(username,password)">Login</button>
        </div>

大功告成。我使用的kibana的版本是4.2.0，enjoy it。