public static void HandleImmediateThumbnail(string filePath, Timming timming = Timming.Immediate)
{
//正则从文件路径里匹配出上传的文件夹目录.....
var m = Regex.Match(filePath, @"^(.*)\\upload\\(.+)\\(day_\d+)\\(\d+)(\.[A-Za-z]+)$", RegexOptions.IgnoreCase);
if (!m.Success)
{
return;
}
var root = m.Groups[1].Value;
var folder = m.Groups[2].Value;
var subFolder = m.Groups[3].Value;
var fileName = m.Groups[4].Value;
var ext = m.Groups[5].Value;
foreach (var pair in UploadConfigContext.ThumbnailConfigDic
.Where(t => t.Key.StartsWith(folder.ToLower() + "_") && t.Value.Timming == timming))
{
var size = pair.Value;
var thumbnailFileFolder = string.Format("{0}\\upload\\{1}\\{2}\\thumb",
root, folder, subFolder);
if (!Directory.Exists(thumbnailFileFolder))
{
Directory.CreateDirectory(thumbnailFileFolder);
}
var thumbnailFilePath = string.Format("{0}\\upload\\{1}\\{2}\\thumb\\{3}_{4}_{5}{6}",
root, folder, subFolder, fileName, size.Width, size.Height, ext);
ThumbnailHelper.MakeThumbnail(filePath, thumbnailFilePath, size);
}
}
public static void HandlerLazyThumbnail()
{
foreach (var group in UploadConfigContext.UploadConfig.UploadFolders)
{
var folder = Path.Combine(UploadConfigContext.UploadPath, group.Path);
if (!Directory.Exists(folder))
{
continue;
}
foreach (var dayFolder in Directory.GetDirectories(folder))
{
foreach (var filePath in Directory.GetFiles(dayFolder))
{
var m = Regex.Match(filePath, @"^(.+\\day_\d+)\\(\d+)(\.[A-Za-z]+)$", RegexOptions.IgnoreCase);
if (!m.Success)
{
continue;
}
var root = m.Groups[1].Value;
var fileName = m.Groups[2].Value;
var ext = m.Groups[3].Value;
var thumbnailFileFolder = Path.Combine(dayFolder, "Thumb");
if (!Directory.Exists(thumbnailFileFolder))
{
Directory.CreateDirectory(thumbnailFileFolder);
}
//删除配置里干掉的Size对应的缩略图
//先不启用，等配置添完了再启用
//foreach (var thumbFilePath in Directory.GetFiles(thumbnailFileFolder))
//{
// if (!group.ThumbnailSizes.Exists(s =>
// Regex.IsMatch(thumbFilePath, string.Format(@"\\\d+_{0}_{1}+\.[A-Za-z]+$", s.Width, s.Height))))
// File.Delete(thumbFilePath);
//}
foreach (var size in group.ThumbnailSizes)
{
if (size.Timming != Timming.Lazy)
{
continue;
}
var thumbnailFilePath = string.Format("{0}\\thumb\\{1}_{2}_{3}{4}",
root, fileName, size.Width, size.Height, ext);
if (File.Exists(thumbnailFilePath) && size.IsReplace)
{
File.Delete(thumbnailFilePath);
}
if (!File.Exists(thumbnailFilePath))
{
ThumbnailHelper.MakeThumbnail(filePath, thumbnailFilePath, size);
}
}
}
}
}
}
public void ProcessRequest(HttpContext context)
{
//如果304已缓存了，则返回
if (!String.IsNullOrEmpty(context.Request.Headers["If-Modified-Since"]))
{
context.Response.StatusCode = 304;
context.Response.StatusDescription = "Not Modified";
return;
}
var path = context.Request.CurrentExecutionFilePath;
if (!path.EndsWith(".axd") && !path.StartsWith("/Upload", StringComparison.OrdinalIgnoreCase))
{
return;
}
//正则从Url里匹配出上传的文件夹目录.....
var m = Regex.Match(path, @"upload/(.+)/(day_\d+)/thumb/(\d+)_(\d+)_(\d+)\.([A-Za-z]+)\.axd$", RegexOptions.IgnoreCase);
if (!m.Success)
{
return;
}
var folder = m.Groups[1].Value;
var subFolder = m.Groups[2].Value;
var fileName = m.Groups[3].Value;
var width = m.Groups[4].Value;
var height = m.Groups[5].Value;
var ext = m.Groups[6].Value;
//如果在配置找不到需要按需生成的，则返回，这样能防止任何人随便敲个尺寸就生成
string key = string.Format("{0}_{1}_{2}", folder, width, height).ToLower();
bool isOnDemandSize = UploadConfigContext.ThumbnailConfigDic.ContainsKey(key) && UploadConfigContext.ThumbnailConfigDic[key].Timming == Timming.OnDemand;
if (!isOnDemandSize)
{
return;
}
var thumbnailFilePath = string.Format(@"{0}\{1}\Thumb\{2}_{4}_{5}.{3}", folder, subFolder, fileName, ext, width, height);
thumbnailFilePath = Path.Combine(UploadConfigContext.UploadPath, thumbnailFilePath);
var filePath = string.Format(@"{0}\{1}\{2}.{3}", folder, subFolder, fileName, ext);
filePath = Path.Combine(UploadConfigContext.UploadPath, filePath);
if (!File.Exists(filePath))
{
return;
}
//如果不存在缩略图，则生成
if (!File.Exists(thumbnailFilePath))
{
var thumbnailFileFolder = string.Format(@"{0}\{1}\Thumb", folder, subFolder);
thumbnailFileFolder = Path.Combine(UploadConfigContext.UploadPath, thumbnailFileFolder);
if (!Directory.Exists(thumbnailFileFolder))
{
Directory.CreateDirectory(thumbnailFileFolder);
}
ThumbnailHelper.MakeThumbnail(filePath, thumbnailFilePath, UploadConfigContext.ThumbnailConfigDic[key]);
}
//缩略图存在了，返回图片字节，并输出304标记
context.Response.Clear();
context.Response.ContentType = GetImageType(ext);
byte[] responseImage = File.ReadAllBytes(thumbnailFilePath);
context.Response.BinaryWrite(responseImage);
Set304Cache(context);
context.Response.Flush();
}
