Javascript 获得'；请求的资源'；尝试在Ionic 3中传递jwt令牌时出错

我正在学习Ionic 3，并且已经成功地实现了身份验证注册等。但是在身份验证过程之后，我无法将存储的令牌发送到任何受保护的页面

这就是我得到的错误

无法加载XMLHttpRequest。不 “Access Control Allow Origin”标头出现在请求的服务器上 资源。因此，不允许使用源“” 通道（索引）：1个错误

这是我正在使用的JWT库

我的Ionic应用程序正在本地主机8100上运行 我的服务器端应用程序正在app.dev上运行

HttpService

import {Injectable} from '@angular/core';
import {Http, Headers} from '@angular/http';
import * as AppConfig from '../../app/app.config';
import {AuthHttp} from 'angular2-jwt';

@Injectable()
export class HttpService {

  post(url, data) {
   return this.authHttp.post(url,JSON.stringify(data));
  }

}


import { Component } from '@angular/core';
import { IonicPage, NavController } from 'ionic-angular';
import {Validators, FormBuilder, FormGroup} from '@angular/forms';
import { HttpService } from  '../../providers/http-service/http-service';
import {Storage} from '@ionic/storage';

/**
 * Generated class for the ProfiePage page.
 *
 * See http://ionicframework.com/docs/components/#navigation for more info
 * on Ionic pages and navigation.
 */
@IonicPage()
@Component({
  selector: 'page-profie',
  templateUrl: 'profie.html',
})

App.modulet.ts

import { BrowserModule } from '@angular/platform-browser';
import { ErrorHandler, NgModule } from '@angular/core';
import { IonicApp, IonicErrorHandler, IonicModule } from 'ionic-angular';
import { SplashScreen } from '@ionic-native/splash-screen';
import { StatusBar } from '@ionic-native/status-bar';
import {Http,HttpModule} from '@angular/http';
import {Storage} from '@ionic/storage';

import { MyApp } from './app.component';
import { HomePage } from '../pages/home/home';
import { AuthServiceProvider } from '../providers/auth-service/auth-service';
import { ProfiePage } from '../pages/profie/profie';
import {AuthHttp, AuthConfig} from 'angular2-jwt';

import {IonicStorageModule} from '@ionic/storage';
import {HttpService} from '../providers/http-service/http-service';

let storage = new Storage({});

export function getAuthHttp(http) {
  return new AuthHttp(new AuthConfig({
    noJwtError: true,
    globalHeaders: [{'Accept': 'application/json'}],
    tokenGetter: (() => storage.get('token')),
  }), http);
}



@NgModule({
  declarations: [
    MyApp,
    HomePage,
    ProfiePage
  ],
  imports: [
    BrowserModule,
    IonicModule.forRoot(MyApp),
    IonicStorageModule.forRoot(),
    HttpModule
  ],
  bootstrap: [IonicApp],
  entryComponents: [
    MyApp,
    HomePage,
    ProfiePage
  ],
  providers: [
    StatusBar,
    SplashScreen,
    {provide: ErrorHandler, useClass: IonicErrorHandler},
    AuthServiceProvider,
    HttpService,
    {
      provide: AuthHttp,
      useFactory: getAuthHttp,
      deps: [Http]
    }
  ]
})

export class AppModule {

}

轮廓组件

export class ProfiePage {

  private formData: FormGroup;
  public error: string = "";

  fname: any;
  lname: any;
  location: any;

  constructor(
    public formBuilder: FormBuilder,
    public httpService: HttpService,
    private storage: Storage
  ) {

    this.formData = this.formBuilder.group({
      fname: ['', Validators.required],
    });


  }

  save() {

    this.httpService.post("http://myapp.dev/api/profile/", {
      fname: this.fname
    }).subscribe(
      data => {
        console.log("success")
      },
      error => {
        console.log("error")
      });


  }

}

---

CORS错误来自后端。不是前端。这不是角度问题，而是后端问题。谢谢你的信息！最后，我把它修好了。正如@trichetriche所说，这是服务器的问题。这篇文章帮了我很大的忙！如果你不介意，请从你的帖子中删除角度标签