使用 Angular 1.x 可以使用以下代码拦截所有 ajax 请求：
$httpProvider.interceptors.push('interceptRequests');
...
var app_services = angular.module('app.services', []);
app_services.factory('interceptRequests', [function () {
var authInterceptorServiceFactory = {};
var _request = function (config) {
//do something here
};
var _responseError = function (rejection) {
//do something here
}
authInterceptorServiceFactory.request = _request;
authInterceptorServiceFactory.responseError = _responseError;
return authInterceptorServiceFactory;
}]);
Angular 2 中有类似的（或开箱即用的）东西吗？
一种方法可能是延长HTTP拦截调用的对象：
@Injectable()
export class CustomHttp extends Http {
request(url: string | Request, options?: RequestOptionsArgs): Observable<Response> {
console.log('request...');
return super.request(url, options).catch(res => {
// do something
});
}
get(url: string, options?: RequestOptionsArgs): Observable<Response> {
console.log('get...');
return super.get(url, options).catch(res => {
// do something
});
}
}
并按如下所述注册：
bootstrap(AppComponent, [HTTP_PROVIDERS,
new Provider(Http, {
useFactory: (backend: XHRBackend, defaultOptions: RequestOptions) => new CustomHttp(backend, defaultOptions),
deps: [XHRBackend, RequestOptions]
})
]);
例如，您可以利用catch运算符捕获错误并在全局范围内处理它们...
看看这个笨蛋：https://plnkr.co/edit/ukcJRuZ7QKlV73jiUDd1?p=preview https://plnkr.co/edit/ukcJRuZ7QKlV73jiUDd1?p=preview.
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