导入支持zip实现

 

using Microsoft.AspNetCore.Http;
using Microsoft.Net.Http.Headers;
using System;
using System.Collections.Generic;
using System.IO.Compression;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Volo.Abp.DependencyInjection;
using YuYunAbp.Core.Km;
using YuYunAbp.Application.Dtos;
using Microsoft.AspNetCore.Mvc.ModelBinding;
using YuYunAbp.Core.Km.Extensions;
using Microsoft.AspNetCore.Http.Features;
using Microsoft.AspNetCore.Mvc;

namespace YuYunAbp.Application.Authorization
{

public class CustomFileUploadDtoBinder : IModelBinder
{
public async Task BindModelAsync(ModelBindingContext bindingContext)
{
if (IsMultipartRequest(bindingContext.HttpContext.Request))
{
// 使用默认绑定
var model = new FileUpLoadDto();
var form = bindingContext.HttpContext.Request.Form;

model.useHeaderRow = Convert.ToBoolean(form["useHeaderRow"]);
model.FileType = (UploadContentType)Convert.ToInt32(form["FileType"]);
var files = form.Files;
var processedFiles = await ProcessFilesAsync(files);
model.uploadedFile = processedFiles.FirstOrDefault();
bindingContext.Result = ModelBindingResult.Success(model);
}

}

private async Task<IFormFileCollection> ProcessFilesAsync(IFormFileCollection files)
{
var processedFiles = new FormFileCollection();

foreach (var file in files)
{
if (IsZipFile(file))
{
var unzippedFiles = await UnzipFilesAsync(file);
foreach (var unzippedFile in unzippedFiles)
{
processedFiles.Add(unzippedFile);
}
}
else
{
processedFiles.Add(file);
}
}

return processedFiles;
}

private bool IsMultipartRequest(HttpRequest request)
{
return !string.IsNullOrEmpty(request.ContentType)
&& request.ContentType.Contains("multipart/form-data");
}

private bool IsZipFile(IFormFile file)
{
return file.FileName.EndsWith(".zip", StringComparison.OrdinalIgnoreCase)
|| file.ContentType == "application/zip"
|| file.ContentType == "application/x-zip-compressed";
}

private async Task<List<IFormFile>> UnzipFilesAsync(IFormFile zipFile)
{
var extractedFiles = new List<IFormFile>();
var tempDirectory = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
Directory.CreateDirectory(tempDirectory);

try
{
using (var zipStream = zipFile.OpenReadStream())
using (var archive = new ZipArchive(zipStream, ZipArchiveMode.Read, false, Encoding.GetEncoding("GB2312")))
{
foreach (var entry in archive.Entries)
{
if (string.IsNullOrEmpty(entry.Name)) continue;

var safeFileName = Path.GetFileName(entry.Name);
var ext = Path.GetExtension(entry.Name);
var filePath = Path.Combine(tempDirectory, safeFileName);

entry.ExtractToFile(filePath, overwrite: true);

var fileInfo = new FileInfo(filePath);
var fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read);

extractedFiles.Add(new FormFile(
fileStream,
0,
fileInfo.Length,
entry.Name,
entry.Name)
{
Headers = new HeaderDictionary
{
[HeaderNames.ContentType] = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
}
});
}
}
}
finally
{
// 注意：不能立即删除目录，否则文件流还在使用
// Directory.Delete(tempDirectory, recursive: true);
}

return extractedFiles;
}
}

[AttributeUsage(AttributeTargets.Parameter)]
public class CustomModelBinderAttribute : ModelBinderAttribute
{
public CustomModelBinderAttribute() : base(typeof(CustomFileUploadDtoBinder))
{
}
}
}