# How to solve this error angular http **URL:** \ **Category:** ionic-v3\ **Created:** [December 1, 2017, 7:56am UTC](https://forum.ionicframework.com/t/how-to-solve-this-error-angular-http/114028 "2017-12-01T07:56:00Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![nagarajsabhahith](https://sea1.discourse-cdn.com/ionicframework/user_avatar/forum.ionicframework.com/nagarajsabhahith/32/133450_2.png) [@nagarajsabhahith](https://forum.ionicframework.com/u/nagarajsabhahith)\ **Post date:** [December 1, 2017, 7:56am UTC](https://forum.ionicframework.com/t/how-to-solve-this-error-angular-http/114028/1 "2017-12-01T07:56:00Z")
Response for preflight has invalid HTTP status code 401 I have started with super app from ionic and i have changed example url to my url My code is post(endpoint: string, body: any, reqOpts?: any) { reqOpts = { headers: new HttpHeaders().set(‘Authorization’,‘Basic V2FwcHlVSTp3QVBQWXVpQE5T’) }; return this.http.post(this.url + ‘/’ + endpoint, body, reqOpts); } and my error is ![error](https://global.discourse-cdn.com/ionicframework/original/3X/e/2/e2568a2ffecf9686d3fae6b96ee19c282f3af762.png) but i am getting response in postman ---
**Author:** ![nagarajsabhahith](https://sea1.discourse-cdn.com/ionicframework/user_avatar/forum.ionicframework.com/nagarajsabhahith/32/133450_2.png) [@nagarajsabhahith](https://forum.ionicframework.com/u/nagarajsabhahith)\ **Post date:** [December 1, 2017, 9:14am UTC](https://forum.ionicframework.com/t/how-to-solve-this-error-angular-http/114028/2 "2017-12-01T09:14:24Z")
Guys please help me out ---
**Author:** ![wthijmen](https://sea1.discourse-cdn.com/ionicframework/user_avatar/forum.ionicframework.com/wthijmen/32/113686_2.png) [@wthijmen](https://forum.ionicframework.com/u/wthijmen)\ **Post date:** [December 1, 2017, 9:15am UTC](https://forum.ionicframework.com/t/how-to-solve-this-error-angular-http/114028/3 "2017-12-01T09:15:48Z")
> [@nagarajsabhahith](#): > > Guys please help me out Read this forum post, about facing the same problem (Unauthorized). > [@401 (Unauthorized) \[SOLVED\]](https://forum.ionicframework.com/t/401-unauthorized-solved/87929): > > Hi, friends! When consuming the service it displays the following error: http://localhost:8080/Api/webresources/v1/usuario/mguillen. Response for preflight has invalid HTTP status code 401 (Unauthorized) ApiRest.ts import { Injectable } from '@angular/core'; import { Http, Headers, RequestOptions } from '@angular/http'; import 'rxjs/add/operator/map'; @Injectable() export class ApiRest { constructor(public http: Http) { } public getUsuarioInventiva(usuario: string) { let … ---
**Author:** ![nagarajsabhahith](https://sea1.discourse-cdn.com/ionicframework/user_avatar/forum.ionicframework.com/nagarajsabhahith/32/133450_2.png) [@nagarajsabhahith](https://forum.ionicframework.com/u/nagarajsabhahith)\ **Post date:** [December 2, 2017, 10:10am UTC](https://forum.ionicframework.com/t/how-to-solve-this-error-angular-http/114028/4 "2017-12-02T10:10:09Z")
I have tried a lot of code changes with different different angular versions, unfortunately still i am not able to solve this issue… My request is send as OPTIONS instead of POST when i will add Authorization in headers if i remove all the headers then request is on POST with this Http, Headers, RequestOptions its working in @angular/ 2.2.1 but i am not able to solve this in angular 4.4.6 and 5.0.5 ---
**Author:** ![Thavarajan](https://sea1.discourse-cdn.com/ionicframework/user_avatar/forum.ionicframework.com/thavarajan/32/103608_2.png) [@Thavarajan](https://forum.ionicframework.com/u/Thavarajan)\ **Post date:** [December 2, 2017, 11:05am UTC](https://forum.ionicframework.com/t/how-to-solve-this-error-angular-http/114028/5 "2017-12-02T11:05:14Z")
did you notice the double slash before get categories ---
**Author:** ![nagarajsabhahith](https://sea1.discourse-cdn.com/ionicframework/user_avatar/forum.ionicframework.com/nagarajsabhahith/32/133450_2.png) [@nagarajsabhahith](https://forum.ionicframework.com/u/nagarajsabhahith)\ **Post date:** [December 2, 2017, 4:06pm UTC](https://forum.ionicframework.com/t/how-to-solve-this-error-angular-http/114028/6 "2017-12-02T16:06:25Z")
ya i have noticed that and corrected but issue is still same… I have removed Authorization in my server and tested without headers in http.post, response is coming but when i will add Authorization, that time request method will automatically changing from POST to OPTIONS ---
**Author:** ![nagarajsabhahith](https://sea1.discourse-cdn.com/ionicframework/user_avatar/forum.ionicframework.com/nagarajsabhahith/32/133450_2.png) [@nagarajsabhahith](https://forum.ionicframework.com/u/nagarajsabhahith)\ **Post date:** [December 2, 2017, 4:42pm UTC](https://forum.ionicframework.com/t/how-to-solve-this-error-angular-http/114028/7 "2017-12-02T16:42:12Z")
I have added android platform and build apk… i got the response in real device but i didn’t get response in browser with headers… ---
**Author:** ![mhartington](https://sea1.discourse-cdn.com/ionicframework/user_avatar/forum.ionicframework.com/mhartington/32/137757_2.png) [@mhartington](https://forum.ionicframework.com/u/mhartington)\ **Post date:** [July 19, 2021, 10:01pm UTC](https://forum.ionicframework.com/t/how-to-solve-this-error-angular-http/114028/8 "2021-07-19T22:01:11Z")
Closed on July 19, 2021, 10:01pm UTC