.Net Core实现下载多个文件并压缩打包
一、本示例使用环境:Net Core3.1、WebAPI、Linux
二、使用核心类:ZipFile
三、示例代码(亲测有效)
using System.Net.Http; using System.IO.Compression;
[HttpGet,Route("DownFile")] [Authorize] public async Task<ApiResponse<string>> DownFile() { //自定义的返回结果类 ApiResponse<string> result = new ApiResponse<string>(); try { //远程下载多个文件的地址 List<string> filePaths = new List<string>() { "http://model.netai.vip/myupfiles/u4f/201029115909/cover-fece024a-af02-4e75-b78b-ce6b0b2c697f.jpg", "http://model.netai.vip/myupfiles/u4f/201029115909/obj-d7074dca-cead-4bd0-965a-fc60b02db5ce.obj", "http://model.netai.vip/myupfiles/u4f/201029115909/material-3ac7911f-64c0-4765-bf0f-26c0972023aa.mtl", "http://model.netai.vip/myupfiles/u4f/201029115909/handpaint-118835d2-6286-49b5-9cc3-b7e123a41bbd.aim" }; //多个文件的重命名 List<string> fileNames = new List<string>() { "cover.jpg", "obj.obj", "material.mtl", "handpaint.aim" }; //先判断是否保存有上次打包的压缩文件 if (System.IO.File.Exists(Directory.GetCurrentDirectory() + "/wwwroot/ziliao.zip")) { System.IO.File.Delete(Directory.GetCurrentDirectory() + "/wwwroot/ziliao.zip"); } //准备用来存放下载的多个文件流目录 string pathZip = Directory.GetCurrentDirectory() + "/wwwroot/downfile/"; for (int i = 0; i < filePaths.Count; i++) { string newPath = pathZip + "dir"+i; if (!Directory.Exists(newPath)) { Directory.CreateDirectory(newPath); } string path = filePaths[i]; HttpClient client = new HttpClient(); client.BaseAddress = new Uri(path); //根据文件信息中的文件地址获取远程服务器,返回文件流 var stream = await client.GetStreamAsync(path); var fils = File(stream, "application/vnd.android.package-archive", Path.GetFileName(path)); //创建文件流(文件路径,文件操作.创建) using (FileStream fs = new FileStream(newPath + "/" + fileNames[i], FileMode.Create)) { //复制文件流 fils.FileStream.CopyTo(fs); } } //对多个文件流所在的目录进行压缩 ZipFile.CreateFromDirectory(Directory.GetCurrentDirectory() + "/wwwroot/downfile/", Directory.GetCurrentDirectory() + "/wwwroot/" + "ziliao.zip"); //删除目录以及目录下的子文件 //存在即删除 if (Directory.Exists(pathZip)) { Directory.Delete(pathZip, true); } //result.code = flag ? StatusCodes.Status200OK : StatusCodes.Status417ExpectationFailed; result.message = "压缩成功"; } catch (Exception ex) { result.message = "上传异常,原因:" + ex.Message; } return result; }
注意:示例中的多个文件下载地址已不可用,需要替换成你们自己的文件所在地址
压缩完成后,可前往项目下的/wwwroot/downfile/目录查看压缩好的ziliao.zip文件,并且压缩文件的目录结构可以随自己的实际情况进行改动
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