private Dictionary <string, string> GridFsSave()
{
var database = (_fileType == FileType.Image ? "picture" : "attach");
var manager = GridFsManager.Instance(database);
var list = new Dictionary <string, string>();
foreach (string name in _context.Request.Files.Keys)
{
var file = _context.Request.Files[name];
if (file == null)
{
continue;
}
var fileName = manager.Save(file.InputStream);
list.Add(name, string.Format("{0}mongo/{1}/{2}{3}", Contains.BaseUrl, database, fileName,
Path.GetExtension(file.FileName)));
}
return(list);
}
/// <summary> 返回图片格式 </summary>
/// <param name="context"></param>
/// <param name="defaultFile"></param>
internal static void ResponseImage(HttpContext context = null, string defaultFile = null)
{
context = context ?? HttpContext.Current;
if (context == null)
{
return;
}
var path = (string.IsNullOrWhiteSpace(defaultFile) ? context.Request.Url.AbsolutePath : defaultFile);
var ext = Path.GetExtension(path);
if (string.IsNullOrWhiteSpace(ext))
{
return;
}
var reg = new Regex(Contains.ImageUrlRegex, RegexOptions.IgnoreCase);
var uri = context.Request.Url.AbsoluteUri;
var hash = uri.Md5();
if (IsCachedOnBrowser(context, hash))
{
return;
}
int width = -1, height = -1;
if (reg.IsMatch(uri))
{
var m = reg.Match(uri);
width = ConvertHelper.StrToInt(m.Groups["w"].Value, -1);
height = ConvertHelper.StrToInt(m.Groups["h"].Value, -2);
if (width == -1 && height < -1)
{
height = -1;
}
if (path != null)
{
path = path.Replace(m.Groups[1].Value, string.Empty);
}
}
var resp = context.Response;
resp.AppendHeader("Vary", "Accept-Encoding");
resp.AppendHeader("Cache-Control", "max-age=604800");
resp.AppendHeader("Expires", DateTime.Now.AddYears(1).ToString("R"));
resp.AppendHeader("ETag", hash);
resp.ContentType = Contains.MiniType[ext];
resp.Charset = "utf-8";
var fileStream = Stream.Null;
if (path != null && path.StartsWith("/mongo/"))
{
var name = Path.GetFileNameWithoutExtension(path);
var db = path.Split('/')[2];
fileStream = GridFsManager.Instance(db).Read(name);
if (fileStream == Stream.Null)
{
path = context.Server.MapPath(Contains.DefaultImage);
}
}
else
{
path = context.Server.MapPath(path);
}
using (var img = fileStream == Stream.Null ? new ImageCls(path) : new ImageCls(fileStream))
{
var bit = img.ResizeImg(width, height);
var encoderParameters = new EncoderParameters(1);
encoderParameters.Param[0] = new EncoderParameter(Encoder.Quality, 88L);
var encoder = GetEncoderInfo(ext);
bit.Save(resp.OutputStream, encoder, encoderParameters);
}
}