（systemjs）xhr錯誤（404找不到）正在加載

Question

我在Angular 2應用程序中使用了服務，並且出現了下面附加的錯誤。

我開始使用克隆爲「my-proj」的「Angular 2 QuickStart」這個項目。

Error screenshot

systemjs.config.js

/** 
* System configuration for Angular samples 
* Adjust as necessary for your application needs. 
*/ 
(function (global) { 
System.config({ 
paths: { 
    // paths serve as alias 
    'npm:': 'node_modules/' 
    }, 
    // map tells the System loader where to look for things 
    map: { 
    // our app is within the app folder 
    app: 'app', 

    // angular bundles 
    '@angular/core': 'npm:@angular/core/bundles/core.umd.js', 
    '@angular/common': 'npm:@angular/common/bundles/common.umd.js', 
    '@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js', 
    '@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js', 
    '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js', 
    '@angular/http': 'npm:@angular/http/bundles/http.umd.js', 
    '@angular/router': 'npm:@angular/router/bundles/router.umd.js', 
    '@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js', 
    '@angular/upgrade': 'npm:@angular/upgrade/bundles/upgrade.umd.js', 

    // other libraries 
    'rxjs':      'npm:rxjs', 
    'angular-in-memory-web-api': 'npm:angular-in-memory-web-api', 
}, 
// packages tells the System loader how to load when no filename and/or no extension 
packages: { 
    app: { 
    main: './main.js', 
    defaultExtension: 'js' 
    }, 
    rxjs: { 
    defaultExtension: 'js' 
    }, 
    'angular-in-memory-web-api': { 
    main: './index.js', 
    defaultExtension: 'js' 
    } 
} 
}); 
})(this); 

app.module.ts

import { NgModule }  from '@angular/core'; 
import { BrowserModule } from '@angular/platform-browser'; 
import { HttpModule, JsonpModule } from '@angular/http'; 

import { AppComponent } from './app.component'; 
import { ProfileComponent } from './components/profile.component'; 

@NgModule({ 
imports: [ BrowserModule,HttpModule,JsonpModule ], 
declarations: [ AppComponent,ProfileComponent ], 
bootstrap: [ AppComponent ] 
}) 
export class AppModule { } 

profile.component.ts

個

import { Component } from '@angular/core'; 
import {GithubService} from '../services/github.service'; 
import 'rxjs/add/operator/map'; 
@Component({ 
moduleId:module.id, 
selector: 'profile', 
templateUrl:'profile.component.html' 
}) 
export class ProfileComponent { 

constructor(private githubService:GithubService){ 
    this.githubService.getUser().subscribe(user => { 
     console.log(user); 
    }); 
} 
} 

github.service.ts

import { Injectable } from '@angular/core'; 
import {Http,Headers} from '@angular/Http'; 
import 'rxjs/add/operator/map'; 
@Injectable() 

export class GithubService{ 
private username:string; 

constructor(private http:Http){ 
    console.log('Github Service Ready...'); 
    this.username='bradtraversy'; 
} 

getUser(){ 
    return this.http.get('http://api.github.com/users'+this.username).map(res => res.json); 
} 
} 

Answer 1

在github.service.ts，改變

import {Http,Headers} from '@angular/Http' 

到

import {Http,Headers} from '@angular/http' 

可能的幫助。