如何在Angular 7中使用BLOB下载任何文件类型(DGN，DOCX等)

Question

am返回API的字节数组。我的要求是下载所有文件类型。在下载DGN文件或其他类型

时，请错误(无法加载PDF文档(

可以将字节数组转换为blob并下载PDF文件。

 download(): void {
        this._service.download().subscribe(data => {
            this.downloadFile(this.byteToBlob(data, 'application/octet-stream', 512));
        },
            error => console.log("Error downloading the file."),
            () => console.log('Completed file download.'));
    }

    downloadFile(data: any): void {
        const blob = new Blob([data], { type: 'application/pdf' });
        const url = window.URL.createObjectURL(blob);
        window.open(url);
    }

在下载非PDF文件时获取错误"无法加载PDF文档"

Answer 1

希望您的后端应该喜欢如下

let file = fs.readFileSync(tmpFilePath)
res.setHeader('Content-disposition', `attachment; filename=temp_file.jpg;status=OK`)
res.send(file)

Angular Service

downloadMedia(): Observable<any> {
return this.http.get<any>(`/api/event/medias/download/image`, {responseType: 'blob' as 'json'})

}

组件

this.service.downloadMedia().subscribe(result => {
    let imageFormat = result.type.toString()
    saveAs(result, 'temp_file.jpg');
  }