我想连接到 http://api.themoviedb.org 以便执行GET请求。由于我正在使用浏览器(离子服务 -l)，因此出现 CORS 错误。为了规避 CORS 错误，我尝试使用 JSONP 但没有成功。
这是我所做的：
-
在app.module.ts中：
import { HttpClientModule， HttpClientJsonpModule } from '@angular/common/http';
。
进口： [ 浏览器模块， IonicModule.forRoot(MyApp)， HttpClientModule， HttpClientJsonpModule]，
... -
在组件的.ts文件中：从 '
rxjs/Observable'
导入 { Observable };从 '@angular/common/http' 导入 { HttpClient };
。在课堂
电影中：可观察<任何>;
constructor(public navCtrl： NavController， public navParams： NavParams， public http： HttpClient)
{
const url = "https://api.themoviedb.org/3/movie/550?api_key= [MY_API_KEY]&callback=JSONP_CALLBACK";
this.films = this.http.jsonp(url， 'callback');
}
... -
在组件的.html中：
<ion-content padding> <ion-list> <button ion-item> {{(films | async)?.title}} </button> </ion-list> </ion-content>
我收到一个错误，告诉它无法解析响应：
以下是错误([MY_API_KEY] 是错误代码中的实际API_KEY)：
Uncaught TypeError: ["ng_jsonp_callback_0","JSONP_CALLBACK"] is not a function
at 550?api_key=[MY_API_KEY]&callback=ng_jsonp_callback_0&callback=JSONP_CALLBACK:1
(anonymous) @ 550?api_key=[MY_API_KEY]&callback=ng_jsonp_callback_0&callback=JSONP_CALLBACK:1
core.js:1350 ERROR HttpErrorResponse {headers: HttpHeaders, status: 0, statusText: "JSONP Error", url: "https://api.themoviedb.org/3/movie/550?api_key=303…lback=ng_jsonp_callback_0&callback=JSONP_CALLBACK", ok: false, …}
以下是收到的回复：
["ng_jsonp_callback_0", "JSONP_CALLBACK"]({"adult":false,"backdrop_path":"/87hTDiay2N2qWyX4Ds7ybXi9h8I.jpg","belongs_to_collection":null,"budget":63000000,"genres":[{"id":18,"name":"Drama"}],"homepage":"http://www.foxmovies.com/movies/fight-club","id":550,"imdb_id":"tt0137523","original_language":"en","original_title":"Fight Club","overview":"A ticking-time-bomb insomniac and a slippery soap salesman channel primal male aggression into a shocking new form of therapy. Their concept catches on, with underground "fight clubs" forming in every town, until an eccentric gets in the way and ignites an out-of-control spiral toward oblivion.","popularity":61.167619,"poster_path":"/adw6Lq9FiC9zjYEpOqfq03ituwp.jpg","production_companies":[{"name":"Twentieth Century Fox Film Corporation","id":306},{"name":"Regency Enterprises","id":508},{"name":"Fox 2000 Pictures","id":711},{"name":"Taurus Film","id":20555},{"name":"Linson Films","id":54050},{"name":"Atman Entertainment","id":54051},{"name":"Knickerbocker Films","id":54052}],"production_countries":[{"iso_3166_1":"DE","name":"Germany"},{"iso_3166_1":"US","name":"United States of America"}],"release_date":"1999-10-15","revenue":100853753,"runtime":139,"spoken_languages":[{"iso_639_1":"en","name":"English"}],"status":"Released","tagline":"Mischief. Mayhem. Soap.","title":"Fight Club","video":false,"vote_average":8.300000000000001,"vote_count":11124})
据我所知，它应该返回一个javascript函数的名称来处理数据。但是我传递回调的方式似乎有问题，并且找不到有关如何使用新 HttpClient 执行此操作的示例。
您正在使用 httpClient 模块，您应该像这样调用它：
const url = "https://api.themoviedb.org/3/movie/550?api_key= [MY_API_KEY];//no callback param
this.films = this.http.jsonp(url, 'callback');
函数调用会将 callback= JSONP_CALLBACK添加到您的 url 中。