public APIResult Up(string folder, string fileName)
{
var exts = new List <string> {
".jpg", ".png", ".gif", ".mp3", ".mp4", ".txt", ".md"
};
var ext = fileName.GetFileExtension();
if (!exts.Contains(ext))
{
return(new APIResult(false, "File deny", 13));
}
// 构造存储路径
var url = GetUploadPath(folder, fileName);
var path = Asp.MapPath(url);
var fi = new FileInfo(path);
if (!fi.Directory.Exists)
{
Directory.CreateDirectory(fi.Directory.FullName);
}
// 存储第一个文件
var files = Asp.Request.Form.Files;
if (files.Count == 0)
{
return(new APIResult(false, "File doesn't exist", 11));
}
using (var stream = File.Create(path))
files[0].CopyToAsync(stream);
return(new APIResult(true, url));
}
public async Task Invoke(HttpContext context)
{
var path = context.Request.Path.Value; // 无 host 和 querystring。如：/res/icon/add.png
var ext = path.GetFileExtension();
if (!Extensions.Contains(ext))
{
await _next.Invoke(context);
return;
}
// 原图路径校验
var rawPath = Asp.MapPath(path);
if (!File.Exists(rawPath))
{
//Asp.Error(404, "Not found"); // 因为 wwwroot 的原因，MapPath 出来的路径可能不对，就不做处理了
await _next.Invoke(context);
return;
}
// 原图输出
var pathAndQuery = path + context.Request.QueryString;
var mimeType = path.GetMimeType();
var w = Asp.GetQueryInt("w");
if (w == null)
{
Asp.WriteFile(rawPath, mimeType: mimeType);
return;
}
// 缩略图参数
var h = Asp.GetQueryInt("h");
if (w > 1000)
{
w = 1000;
}
if (h != null && h > 1000)
{
h = 1000;
}
var key = pathAndQuery.ToLower().MD5();
// 缩略图缓存策略
var cachePath = Asp.MapPath(string.Format("/Caches/{0}.cache", key));
if (!File.Exists(cachePath))
{
IO.PrepareDirectory(cachePath);
var img = Painter.Thumbnail(rawPath, w.Value, h);
img.Save(cachePath);
img.Dispose();
}
Asp.WriteFile(cachePath, mimeType: mimeType);
}
/// <summary>处理文件资源</summary>
public void HandleFileRes(string url)
{
// 文件扩展名及推断属性
this.FileExtension = url.GetFileExtension();
this.MimeType = IO.GetMimeType(this.FileExtension);
this.Type = this.MimeType.Contains("image") ? ResType.Image : ResType.File;
// 物理文件属性
if (url.IsSiteFile())
{
try
{
var physicalPath = Asp.MapPath(url);
var fi = new FileInfo(physicalPath);
this.FileSize = fi.Length;
this.FileMD5 = IO.GetFileMD5(physicalPath);
}
catch (Exception e)
{
UtilConfig.Log("GetFileInfoFail", e.Message);
};
}
}