---
order: 2
title: 压缩
---

通过 `pushUrl` 可以快速将URL资源写入 Zip 实例。

```ts
import { NzMessageService } from 'ng-zorro-antd';
import { Component } from '@angular/core';
import { ZipService } from '@delon/abc';
import * as JSZip from 'jszip';

@Component({
  selector: 'app-demo',
  template: `
  <div *ngIf="instance">
    <button nz-button (click)="data.push({})" [nzType]="'primary'">new</button>
    <button nz-button (click)="download()" class="ml-sm">download</button>
    <nz-table [nzData]="data" [nzFrontPagination]="false" [nzShowPagination]="false" class="mt-sm">
      <thead>
        <tr>
          <th><span>path</span></th>
          <th><span>url</span></th>
        </tr>
      </thead>
      <tbody>
        <tr *ngFor="let i of data; let index = index">
          <td><input nz-input [(ngModel)]="i.path" name="path{{index}}"></td>
          <td><input nz-input [(ngModel)]="i.url" name="url{{index}}"></td>
        </tr>
      </tbody>
    </nz-table>
  </div>
  `
})
export class DemoComponent {
  instance: JSZip | null = null;
  data: { path: string, url: string }[] = [
    { path: 'demo.docx', url: 'https://ng-alain.com/assets/demo.docx' },
    { path: 'img/zorro.svg', url: 'https://ng.ant.design/assets/img/zorro.svg' },
    { path: '小程序标志.zip', url: 'https://wximg.gtimg.com/shake_tv/mina/standard_logo.zip' }
  ];

  constructor(private zip: ZipService, private msg: NzMessageService) {
    this.zip.create().then(ret => this.instance = ret);
  }

  download() {
    const promises: Promise<any>[] = [];
    this.data.forEach(item => {
      promises.push(this.zip.pushUrl(this.instance, item.path, item.url));
    });
    Promise.all(promises).then(() => {
      this.zip.save(this.instance).then(() => {
        this.msg.success('download success');
        this.data = [];
      });
    }, (error: any) => {
      console.warn(error);
      this.msg.error(JSON.stringify(error));
    });
  }
}
```