/// <summary>处理</summary>
/// <param name="context"></param>
protected virtual void OnProcess(HttpContext context)
{
var attachment = GetAttachment();
if (attachment == null || !attachment.IsEnable || !File.Exists(attachment.FullFilePath))
{
OnNotFound(context);
return;
}
// 增加统计
attachment.Increment(null);
// 检查浏览器缓存
var wd = new WebDownload();
wd.ModifyTime = attachment.UploadTime;
if (wd.CheckCache())
{
return;
}
var stream = GetStream(context, attachment);
if (stream.CanSeek && stream.Position >= stream.Length)
{
stream.Position = 0;
}
try
{
OnResponse(context, attachment, stream, null);
}
catch (Exception ex)
{
XTrace.WriteException(ex);
}
finally
{
// 关闭文件流
if (stream is FileStream)
{
stream.Close();
}
}
}
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
AvatarSize avatarSize;
switch (DNTRequest.GetString("size").ToLower())
{
case "large":
avatarSize = AvatarSize.Large;
break;
case "medium":
avatarSize = AvatarSize.Medium;
break;
case "small":
avatarSize = AvatarSize.Small;
break;
default:
avatarSize = AvatarSize.Medium;
break;
}
var uid = DNTRequest.GetInt("uid");
// 如果物理文件存在，直接返回
var fi = Avatars.GetPhysicsAvatarPath(uid + "", avatarSize);
// 如果没有缓存，文件也不在，那么直接返回默认
if (!File.Exists(fi))
{
fi = Utils.GetMapPath(BaseConfigs.GetForumPath.CombinePath("avatars/avatar_" + avatarSize.ToString().ToLower() + ".jpg"));
}
if (File.Exists(fi))
{
var ci = GetData(fi);
// 检查缓存是否有效
var wd = new WebDownload();
wd.BrowserCache = true;
wd.ModifyTime = ci.ModifyTime;
if (wd.CheckCache())
{
return;
}
wd.Stream = new MemoryStream(ci.Data);
//wd.Mode = WebDownload.DispositionMode.Inline;
wd.ContentType = "image/" + Path.GetExtension(fi).TrimStart('.');
// 启用浏览器缓存
wd.BrowserCache = true;
wd.Speed = 0;
wd.Render();
return;
}
//var avatarUrl = Avatars.GetAvatarUrl(uid + "", avatarSize);
//XTrace.WriteLine("头像{0}未取到，跳转地址 {1}", fi, avatarUrl);
//HttpContext.Current.Response.Redirect(avatarUrl);
}
