使用Angular下载zip文件 [英] Download zip file using Angular

问题描述

到目前为止，已经有几个小时了，因为我试图弄清楚如何使用Angular下载zip文件.下载的文件小于原始文件.我点击了此链接如何使用Angular2下载文件

It has been hours now, since I am trying to figure out how to download a zip file using Angular. The file downloaded is smaller than the original file. I followed this link How do I download a file with Angular2.

出于身份验证的原因，我并不是简单地使用< a> 标记进行下载.

I am not simply using the <a> tag for the download for authentication reason.

服务

 downloadfile(filePath: string){
        return this.http
            .get( URL_API_REST + 'downloadMaj?filePath='+ filePath)
            .map(res => new Blob([res], {type: 'application/zip'}))
    }

组件

downloadfileComponent(filePath: string){
        this.appService.downloadfile(filePath)
            .subscribe(data => this.getZipFile(data)),
                error => console.log("Error downloading the file."),
                () => console.log('Completed file download.');
    }


getZipFile(data: any){
        var a: any = document.createElement("a");
        document.body.appendChild(a);

        a.style = "display: none";
        var blob = new Blob([data], { type: 'application/zip' });

        var url= window.URL.createObjectURL(blob);

        a.href = url;
        a.download = "test.zip";
        a.click();
        window.URL.revokeObjectURL(url);

    }

REST API

public void downloadMaj(@RequestParam(value = "filePath") String filePath, HttpServletResponse response) {

        System.out.println("downloadMaj");
        File fichierZip = new File(filePath);

        try {
            System.out.println("nom du fichier:" + fichierZip.getName());
            InputStream inputStream = new FileInputStream(fichierZip);

            response.addHeader("Content-Disposition", "attachment; filename="+fichierZip.getName());
            response.setHeader("Content-Type", "application/octet-stream");

            org.apache.commons.io.IOUtils.copy(inputStream, response.getOutputStream());
            response.getOutputStream().flush();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

任何人都可以知道为什么未下载所有文件吗?

Anyone could tell why all the file is not downloaded?

已解决

downloadfile(filePath: string) {
        return this.http
          .get( URL_API_REST + 'download?filePath=' + filePath, {responseType: ResponseContentType.ArrayBuffer})
          .map(res =>  res)
      }

private getZipFile(data: any) {
    const blob = new Blob([data['_body']], { type: 'application/zip' });

    const a: any = document.createElement('a');
    document.body.appendChild(a);

    a.style = 'display: none';    
    const url = window.URL.createObjectURL(blob);
    a.href = url;
    a.download = test.zip;
    a.click();
    window.URL.revokeObjectURL(url);

  }

推荐答案

1. 在responseType中，您需要分配一个字符串，在这种情况下，该字符串是 arraybuffer ( Angular 5 + )

downloadFile(filename: string) {
  return this.http.get(URL_API_REST + 'download?filename=' + filename, {
    responseType: 'arraybuffer'
  });
}

1. 我们可以创建一个窗口，使用下一个代码直接下载文件:

this.myService.downloadFile(filename).subscribe(data => {
  const blob = new Blob([data], {
    type: 'application/zip'
  });
  const url = window.URL.createObjectURL(blob);
  window.open(url);
});

这篇关于使用Angular下载zip文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！