/// <summary>
/// 保存上传文件
/// </summary>
/// <param name="Request">标识HTTP请求信息</param>
/// <param name="Id">一般是信息主键，用来标识文件存储名称</param>
/// <param name="saveFileType">保存类型，详细参见<see cref="SaveFileType"/></param>
/// <returns></returns>
public static async Task <FileInfo> SaveUploadFile(this HttpRequestMessage Request, string Id, SaveFileType saveFileType = SaveFileType.HeadIcon)
{
if (!Request.Content.IsMimeMultipartContent("form-data"))
{
throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
}
//指定要将文件存入的服务器物理位置
string dirTempPath = string.Empty;
switch (saveFileType)
{
case SaveFileType.HeadIcon:
dirTempPath = HttpContext.Current.Server.MapPath("~/HeadIconFiles");
break;
case SaveFileType.OrganizeLogo:
dirTempPath = HttpContext.Current.Server.MapPath("~/OrganizeLogos");
break;
case SaveFileType.HostBrushBag:
dirTempPath = HttpContext.Current.Server.MapPath("~/HostBrushBags");
break;
case SaveFileType.SubBrushBag:
dirTempPath = HttpContext.Current.Server.MapPath("~/SubBrushBags");
break;
}
//文件夹不存在则创建
if (!Directory.Exists(dirTempPath))
{
Directory.CreateDirectory(dirTempPath);
}
// 设置上传目录
var provider = new RenamingMultipartFormDataStreamProvider(dirTempPath);
// 接受数据并保存文件
return(await Request.Content.ReadAsMultipartAsync(provider).
ContinueWith(NewSaveIocnMethod(Id, saveFileType, dirTempPath, provider)));
}
/// <summary>
/// 文件
/// </summary>
/// <param name="Id"></param>
/// <param name="saveFileType"></param>
/// <param name="dirTempPath"></param>
/// <param name="provider"></param>
/// <returns></returns>
private static Func <Task <RenamingMultipartFormDataStreamProvider>, FileInfo> NewSaveIocnMethod(string Id, SaveFileType saveFileType, string dirTempPath, RenamingMultipartFormDataStreamProvider provider)
{
return(o =>
{
var file = provider.FileData[0];
file.CheckNotNull("file");
string orfilename = provider.GetLocalFileName(file.Headers);
FileInfo fileinfo = new FileInfo(file.LocalFileName);
string fileExt = fileinfo.Extension;
string imageFileTypes = ".gif,.jpg,.jpeg,.png,.bmp";
string binFileTypes = ".shine";
try
{
//文件长度判断
switch (fileinfo.Length)
{
case long i when(i <= 0):
fileinfo.Delete();
throw new Exception("id:请选择上传文件。");
case long i when((saveFileType == SaveFileType.HeadIcon || saveFileType == SaveFileType.OrganizeLogo) && (i >= 4194304)):
//图片文件不能大于4MB
fileinfo.Delete();
throw new Exception("id:上传的图片文件大小不能超过4MB。");
case long i when((saveFileType == SaveFileType.HostBrushBag || saveFileType == SaveFileType.SubBrushBag) && (i >= 31457280)):
//刷机包文件不能大于30MB
fileinfo.Delete();
throw new Exception("id:上传的刷机包文件大小不能超过30MB。");
}
}
catch
{
throw new Exception("id:获取上传文件失败...");
}
//文件扩展
switch (fileExt)
{
case string ext when(string.IsNullOrEmpty(ext)):
fileinfo.Delete();
throw new Exception("id:判断文件类型失败！");
case string ext when(!imageFileTypes.Contains(ext) && (saveFileType == SaveFileType.HeadIcon || saveFileType == SaveFileType.OrganizeLogo)):
fileinfo.Delete();
throw new Exception("id:上传的文件扩展名是不允许的图片扩展名。");
case string ext when(!binFileTypes.Contains(ext) && (saveFileType == SaveFileType.HostBrushBag || saveFileType == SaveFileType.SubBrushBag)):
fileinfo.Delete();
throw new Exception("id:上传的文件扩展名是不允许的刷机包扩展名。");
case string ext when(!imageFileTypes.Contains(ext) && !binFileTypes.Contains(ext)):
fileinfo.Delete();
throw new Exception("id:上传的文件扩展名是不允许的扩展名。");
}
FileInfo info = fileinfo.CopyTo(Path.Combine(dirTempPath, Id.ToString() + fileExt), true);
fileinfo.Delete();
return info;
});
}