HttpInterceptor不会截获

import { Injectable } from '@angular/core';
import { HttpInterceptor, HttpRequest, HttpHandler, HttpEvent } from '@angular/common/http';
import { Observable } from 'rxjs';

@Injectable()
export class MyHttpInterceptor implements HttpInterceptor {
  intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    // 在发送请求之前进行处理
    // 可以修改请求头、请求参数等信息

    // 调用next.handle方法将请求传递给下一个拦截器或最终的HTTP处理程序
    return next.handle(request);
  }
}

import { NgModule } from '@angular/core';
import { HttpClientModule, HTTP_INTERCEPTORS } from '@angular/common/http';
import { MyHttpInterceptor } from './my-http-interceptor';

@NgModule({
  imports: [HttpClientModule],
  providers: [
    { provide: HTTP_INTERCEPTORS, useClass: MyHttpInterceptor, multi: true }
  ]
})
export class AppModule { }