/// <summary>
/// Static file module handle request and trigged this method
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public override async Task HandleRequestAsync(IHttpContext context)
{
if (context.IsHandled)
{
return;
}
string fileName = string.Empty;
if (context.Request.RawUrl == "/")
{
fileName = "index.html";
}
else
{
fileName = options.ExecutionDirectory;
foreach (var dir in context.Request.RawUrl.Split('/'))
{
fileName = Path.Combine(fileName, dir.ToLowerInvariant());
}
}
while (fileName.Contains("?") || fileName.Contains("&"))
{
var indexOf = fileName.IndexOf('?');
if (indexOf == -1)
{
indexOf = fileName.IndexOf('&');
}
if (indexOf != -1)
{
fileName = fileName.Substring(0, indexOf);
}
}
var contentType = MimeType.Associations.GetValueOrDefault(Path.GetExtension(fileName));
byte[] bytes = null;
if (_files.ContainsKey(fileName))
{
if (_files.TryGetValue(fileName, out StaticFileItem staticFileItem))
{
bytes = staticFileItem.Data;
if (options.CacheActive)
{
var expire = (staticFileItem.ExpireDate - DateTime.Now).TotalSeconds;
context.AddCacheExpire(expire);
}
}
}
else
{
try
{
if (File.Exists(fileName))
{
if (contentType.StartsWith("text"))
{
bytes = Encoding.UTF8.GetBytes(File.ReadAllText(fileName));
}
else
{
using (FileStream fs = File.Open(fileName, FileMode.Open, FileAccess.Read))
{
bytes = new byte[fs.Length];
fs.Read(bytes, 0, (int)fs.Length);
}
}
if (options.CacheActive)
{
_files.TryAdd(fileName, new StaticFileItem(bytes, DateTime.Now.AddSeconds(options.ExpireTime)));
var expire = DateTime.Now.AddMinutes(5).Second;
context.AddCacheExpire(expire);
}
}
}
catch (Exception)
{
}
}
if (bytes != null)
{
if (options.AllowedMimeTypes.Any(f => f == "*" || f == contentType))
{
if (!contentType.StartsWith("text"))
{
context.Response.Headers.Add("Content-disposition", "attachment; filename=" + Guid.NewGuid().ToString() + Path.GetExtension(fileName));
}
context.Response.OutputStream.Write(bytes);
context.Response.ContentType = contentType;
context.Response.StatusCode = (int)HttpStatusCode.OK;
context.SetHandled();
}
}
}
