下面是我的Typescript代码,可以从API下载文件
DownloadLM() {
var ID= sessionStorage.getItem("UserID");
return this.http.get(this.baseurl + 'api/DownloadFiles/DownloadLM/' + ID,
{
headers: {
'Content-Type': 'application/json'
},
responseType: 'arraybuffer'
}
)
.subscribe(respData => {
this.downLoad(respData, this.type);
}, error => {
});
}
downLoad(data: any, type: string) {
var blob = new Blob([data], { type: type.toString() });
var url = window.URL.createObjectURL(blob);
var pwa = window.open(url);
if (!pwa || pwa.closed || typeof pwa.closed == 'undefined') {
alert('Please disable your Pop-up blocker and try again.');
}
}
下载Excel File很好,但是它给我不需要的文件一个随机名称,我想在下载时设置自己选择的文件名,
在哪里可以在此处设置文件名? Blob的任何属性?
答案 0 :(得分:5)
您可以将download属性设置为所需的文件名,将href设置为对象url,然后只需单击即可。
var blob = new Blob([data], { type: type.toString() });
var url = window.URL.createObjectURL(blob);
var anchor = document.createElement("a");
anchor.download = "myfile.txt";
anchor.href = blobURL;
anchor.click();
答案 1 :(得分:5)
如果要获取上传文件的确切文件名,请从支持的API流中设置文件名的自定义标头。
您可以这样使用它:我的Excel API响应标头:
content-disposition: inline;filename="salesReport.xls"
content-type: application/octet-stream
date: Wed, 22 Aug 2018 06:47:28 GMT
expires: 0
file-name: salesReport.xls
pragma: no-cache
transfer-encoding: chunked
x-application-context: application:8080
x-content-type-options: nosniff
x-xss-protection: 1; mode=block
Service.ts
excel(data: any) {
return this.httpClient.post(this.config.domain +
`/api/registration/excel/download`,data, {observe: 'response', responseType: 'blob'})
.map((res) => {
let data = {
image: new Blob([res.body], {type: res.headers.get('Content-Type')}),
filename: res.headers.get('File-Name')
}
return data ;
}).catch((err) => {
return Observable.throw(err);
});
}
Component.ts
excelDownload (data) {
this.registration.excel(data).subscribe(
(res) => {
const element = document.createElement('a');
element.href = URL.createObjectURL(res.image);
element.download = res.filename;
document.body.appendChild(element);
element.click();
this.toastr.success("Excel generated successfully");
},
(error) =>{
this.toastr.error('Data Not Found');
});
}
答案 2 :(得分:0)
由于有人要求提供带有承诺的版本,因此您可以使用await和async:
第1部分:从服务器获取Blob:
generateSapExcel(data: GenerateSapExport): Promise<HttpResponse<Blob>> {
return this.http.post(`${this.pathprefix}/GenerateSapExcel`, data, { responseType: 'blob', observe: 'response' })
.toPromise()
.catch((error) => this.handleError(error));
}
第2部分:提取HttpResponse并将其交付给用户:
public downloadFile(data: HttpResponse<Blob>) {
const contentDisposition = data.headers.get('content-disposition');
const filename = this.getFilenameFromContentDisposition(contentDisposition);
const blob = data.body;
const url = window.URL.createObjectURL(blob);
const anchor = document.createElement("a");
anchor.download = filename;
anchor.href = url;
anchor.click();
}
private getFilenameFromContentDisposition(contentDisposition: string): string {
const regex = /filename=(?<filename>[^,;]+);/g;
const match = regex.exec(contentDisposition);
const filename = match.groups.filename;
return filename;
}
第3部分:结合两者:
const blobresponse = await this.dataService.generateSapExcel(dataToSend);
this.downloadService.downloadFile(blobresponse);
第4部分:服务器:
[HttpPost]
[Route(nameof(GenerateSapExcel))]
public async Task<FileStreamResult> GenerateSapExcel(GenerateSapExportDto dto)
{
Stream stream = await _sapKurepoService.GenerateSapExcel(dto);
FileStreamResult result = File(stream, FileHelper.ContentypeExcel, "excel.xlsx");
return result;
}