feat: update

package-lock.json

@@ -8320,11 +8320,6 @@
         }
       }
     },
-    "ngx-logger": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/ngx-logger/-/ngx-logger-1.1.2.tgz",
-      "integrity": "sha1-//QiCP9KTHqmIf7z9nOgCHW9Yts="
-    },
     "ngx-perfect-scrollbar": {
       "version": "5.2.0",
       "resolved": "https://registry.npmjs.org/ngx-perfect-scrollbar/-/ngx-perfect-scrollbar-5.2.0.tgz",

package.json

@@ -47,7 +47,6 @@
     "ng2-cookies": "^1.0.12",
     "ngx-bootstrap": "^1.6.6",
     "ngx-layer": "0.0.4",
-    "ngx-logger": "^1.1.2",
     "ngx-perfect-scrollbar": "5.2.0",
     "ngx-progressbar": "^2.1.1",
     "node": "^9.3.0",

src/app/elements/iframe/iframe.component.ts

@@ -25,7 +25,7 @@ export class ElementIframeComponent implements OnInit {
   ngOnInit() {
     // /guacamole/api/tokens will redirect to http://guacamole/api/tokens
     let options = new RequestOptions();
-    options.headers.append('Content-Type', 'application/x-www-form-urlencoded');
+    options.headers.set('Content-Type', 'application/x-www-form-urlencoded');
     this._http.get('/guacamole/api/tokens?username=' + User.name + '&password=zheng&asset_id=' +
       this.host.id + '&system_user_id=' + this.userid, options
     ).map(res => res.json())