angular – 如何使用ng2-file-upload返回响应

import { Component } from '@angular/core';
import {FileUploader,FileItem,ParsedResponseHeaders} from "ng2-file-upload";

@Component({
    selector: 'upload-file',template: `
    <input type="file" ng2FileSelect [uploader]="uploader">    
    `,})
export class UploadFileComponent {
    uploader:FileUploader;
    ngOnInit(): void {
        this.uploader = new FileUploader({
            url: 'http://url.to/upload',headers: [{name:'Accept',value:'application/json'}],autoUpload: true,});
        this.uploader.onErrorItem = (item,response,status,headers) => this.onErrorItem(item,headers);
        this.uploader.onSuccessItem = (item,headers) => this.onSuccessItem(item,headers);
    }

    onSuccessItem(item: FileItem,response: string,status: number,headers: ParsedResponseHeaders): any {
        let data = JSON.parse(response); //success server response
    }

    onErrorItem(item: FileItem,headers: ParsedResponseHeaders): any {
        let error = JSON.parse(response); //error server response
    }
}