Javascript 无数据响应从iTunes api获取数据-角度
在我的Angular应用程序中,api返回的数据中没有响应?下面的代码,有什么想法吗?我得到的结果计数为0,什么时候应该是50 proxy.conf.jsonJavascript 无数据响应从iTunes api获取数据-角度,javascript,angular,typescript,http,Javascript,Angular,Typescript,Http,在我的Angular应用程序中,api返回的数据中没有响应?下面的代码,有什么想法吗?我得到的结果计数为0,什么时候应该是50 proxy.conf.json { "api": { "target": "https://itunes.apple.com/search?term=drake", "secure": true, "changeOrigin": true } } 服务.ts import { Injectable } from '@
{
"api": {
"target": "https://itunes.apple.com/search?term=drake",
"secure": true,
"changeOrigin": true
}
}
服务.ts
import { Injectable } from '@angular/core';
import { HttpClient, HttpEventType, HttpHeaders, HttpRequest, HttpResponse, HttpErrorResponse } from '@angular/common/http';
import { Observable, of, throwError } from 'rxjs';
import { catchError, retry } from 'rxjs/operators';
@Injectable({
providedIn: 'root'
})
export class ApiService {
api: string = 'api';
constructor(
private http: HttpClient,
) { }
getAll(): Observable<any> {
return this.http.get<any>(this.api)
.pipe(
catchError(this.handleError)
);
}
private handleError(error: HttpErrorResponse) {
if (error.error instanceof ErrorEvent) {
console.log(error.error.message)
} else {
console.log(error.status)
}
return throwError(
console.log('Something is wrong!'));
};
}
import { Component, OnInit } from '@angular/core';
import { HttpClient, HttpEventType, HttpHeaders, HttpRequest, HttpResponse } from '@angular/common/http';
import { ApiService } from '../../../services/api.service';
@Component({
selector: 'app-content',
templateUrl: './content.component.html',
styleUrls: ['./content.component.scss']
})
export class ContentComponent implements OnInit {
public results = [];
public data = [];
constructor(private service: ApiService) { }
private http: HttpClient
ngOnInit() {
this.getApi();
}
private getApi() {
this.service.getAll().subscribe((results) => {
console.log('JSON Response = ', JSON.stringify(results));
this.data = results.results;
})
}
}
JSON api结构
{
"resultCount":50,
"results":[
{
"wrapperType":"track",
"kind":"song",
"artistId":271256
},
]
}
尝试将实际的API端点插入到http调用中,看看是否得到任何结果。从外观上看,您正在尝试执行对“api”的HTTP请求,我怀疑这是否可行。我知道你有一个代理设置,但也许这就是你的问题所在。这也不意味着你在做任何有结果的事情。您正在捕获eorr,但没有其他内容。问题是,如果我将api设置为'api:string=''';'它向我提供了从源“”访问“”处XMLHttpRequest的CORS issueAccess已被CORS策略阻止:请求的资源上不存在“Access Control Allow origin”标头。代理不会修复此问题。他们正在阻止这一切。你可能必须向他们注册你的应用程序,这样你的url就会被列入白名单。我假设他们给了你某种类型的API密钥。@大多数情况下,CORS错误表明API是要从服务器上命中的,客户端不允许。