/// <summary>
/// Busca o parâmetro "picture" na queryString, e trata caso exista.
/// </summary>
/// <param name="context"></param>
private void VerificaParametro_Picture(HttpContext context)
{
if (!String.IsNullOrEmpty(context.Request.QueryString["picture"]))
{
string fileName = UtilBO.DecodificaQueryString(context.Request.QueryString["picture"]);
bool redimensionar = ((!String.IsNullOrEmpty(context.Request.QueryString["w"])) &&
(!String.IsNullOrEmpty(context.Request.QueryString["h"])));
try
{
string folder = context.Server.MapPath("~/App_Themes");
FileInfo info = new FileInfo(folder + Path.DirectorySeparatorChar + fileName);
if (info.Directory.FullName.StartsWith(folder, StringComparison.OrdinalIgnoreCase))
{
if ((info.Exists) && IsImage(info))
{
context.Response.Cache.SetCacheability(HttpCacheability.Public);
context.Response.Cache.SetExpires(DateTime.Now.AddYears(1));
if (redimensionar)
{
int heigth = Convert.ToInt32(context.Request.QueryString["h"]);
int width = Convert.ToInt32(context.Request.QueryString["w"]);
Image.GetThumbnailImageAbort myCallback = ThumbnailCallback;
Image img = Image.FromFile(info.FullName);
// Criando objeto redimencionado.
Image thumb = img.GetThumbnailImage
(
width,
heigth,
myCallback,
IntPtr.Zero
);
// ContentType sempre JPG.
context.Response.ContentType = "image/png";
// Enviando email para Response.
thumb.Save
(
context.Response.OutputStream,
System.Drawing.Imaging.ImageFormat.Jpeg
);
img.Dispose();
thumb.Dispose();
}
else
{
int index = fileName.LastIndexOf(".") + 1;
string extension = fileName.Substring(index).ToUpperInvariant();
// Fix for IE not handling jpg image types
if (string.Compare(extension, "JPG") == 0)
{
context.Response.ContentType = "image/png";
}
else
{
context.Response.ContentType = "image/" + extension;
}
context.Response.TransmitFile(info.FullName);
}
context.Response.Flush();
}
else
{
// Limpa o response.
context.Response.Flush();
context.Response.Clear();
context.ApplicationInstance.CompleteRequest();
}
}
else
{
context.Response.Redirect("~/Manutencao.aspx?erro=404", false);
context.ApplicationInstance.CompleteRequest();
}
}
catch (Exception ex)
{
try
{
// Limpa o response.
context.Response.Flush();
context.Response.Clear();
context.ApplicationInstance.CompleteRequest();
ApplicationWEB._GravaErro(ex);
}
catch
{
}
}
}
}