Angular Interceptor修改头部变更请求方法

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

@Injectable()
export class CustomInterceptor implements HttpInterceptor {
  intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    // 修改请求头部信息
    const modifiedRequest = request.clone({
      setHeaders: {
        'Content-Type': 'application/json',
        'Authorization': 'Bearer your_token_here'
      }
    });

    // 修改请求方法
    modifiedRequest.method = 'PUT';

    // 继续处理修改后的请求
    return next.handle(modifiedRequest);
  }
}

import { HTTP_INTERCEPTORS } from '@angular/common/http';
import { CustomInterceptor } from './custom-interceptor';

@NgModule({
  // ...
  providers: [
    {
      provide: HTTP_INTERCEPTORS,
      useClass: CustomInterceptor,
      multi: true
    }
  ],
  // ...
})
export class AppModule { }