我有一个ionic3应用程序项目,当应用程序从服务器收到响应时添加拦截器,当响应的状态等于401然后应用程序跳到登录页面时,我使用app.getRootNav()。setRoot(LoginPage)。但是,当带有Toast的页面收到401响应时,仍然会出现toast,这是意外的
intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
this.rest = this.inj.get(RestProvider);
return next.handle(req).do(
res => {
...
},
err => {
if (err instanceof HttpErrorResponse) {
if (err.status == 401) {
this.app.getRootNav().setRoot(LoginPage);
super.showToast(this.toastCtrl, "sorry, due to authorization, you must login again")
return;
} else {
throw err;
}
}
})
}
然后当我的http请求像这样:
this.http.post(this.baseUrl + "/recvUsername",param)
.subscribe(
res => {
this.initRecvUsernames(res["data"]);
},
err => {
console.error("get receive user error:" + err.message);
super.showToast(this.toast, "get receive user error");
}
)
然后请求页面上的toast将显示当我跳到登录页面时,如何在请求页面终止吐司?谢谢答案!
您可以在http参数中传递一个标志并在拦截器中将其删除
const params = req.params;
const isPreventToast = params.has('preventToast');
params.delete('preventToast')
const newReq = req.clone({ params });
return next.handle(newReq).do(..., err => { if(!isPreventToast) ... })