public void ProcessRequest(HttpContext context)
{
//write your handler implementation here.
try
{
context.Response.Clear();
context.Response.ClearHeaders();
string result = "";
if (context.Request.Url.AbsoluteUri.Length > 1024)
{
err = new error();
err.statusCode = System.Net.HttpStatusCode.RequestUriTooLong;
err.parameter = "unknown";
err.text = "Request > 1024 characters, too long";
}
else
result = GetWidthAndHeight(context.Request["identifier"], context.Request["return"]);
if (err != null)
{
context.Response.TrySkipIisCustomErrors = true;
context.Response.ContentType = "application/xml";
context.Response.AddHeader("content-disposition", "inline;");
context.Response.StatusCode = (int)err.statusCode;
context.Response.Charset = "";
}
else if (context.Request["return"].Equals("json"))
{
context.Response.ContentType = "application/json";
context.Response.AddHeader("content-disposition", "inline; filename=export.json");
}
else
{
context.Response.ContentType = "application/xml";
context.Response.AddHeader("content-disposition", "inline; filename=export.xml");
}
context.Response.AddHeader("Link", "<http://library.stanford.edu/iiif/image-api/compliance.html#level2>;rel=\"profile\"");
context.Response.AddHeader("content-length", (result.Length).ToString());
context.Response.Flush();
context.Response.Write(result);
HttpContext.Current.ApplicationInstance.CompleteRequest();
}
catch (Exception e)
{
context.Response.Write(e.Message);
}
finally
{
context.Response.End();
}
}
private string GetWidthAndHeight(string p_identifier, string p_returnType)
{
try
{
Extractor kdu = new Extractor();
string xmlMetadata = kdu.GetMetadata(p_identifier.EndsWith(".jp2") ? p_identifier : p_identifier + ".jp2");
XmlDocument doc = new XmlDocument();
doc.LoadXml(xmlMetadata);
Metadata data = new Metadata();
data.profile = "http://library.stanford.edu/iiif/image-api/compliance.html#level2";
data.identifier = p_identifier;
data.width = int.Parse(doc.GetElementsByTagName("Width")[0].InnerText);
data.height = int.Parse(doc.GetElementsByTagName("Height")[0].InnerText);
scale_factors scaleFactors = new scale_factors();
for (int i = 0; i < int.Parse(doc.GetElementsByTagName("Jp2levels")[0].InnerText); i++)
{
scaleFactors.Add(Convert.ToInt32(Math.Pow(2, i)));
}
data.scale_factors = scaleFactors;
formats formats = new formats();
formats.Add("jpg");
formats.Add("png");
formats.Add("gif");
data.formats = formats;
qualities qualities = new qualities();
qualities.Add("native");
qualities.Add("grey");
qualities.Add("bitonal");
data.qualities = qualities;
data.tile_width = int.Parse(doc.GetElementsByTagName("TileWidth")[0].InnerText);
data.tile_height = int.Parse(doc.GetElementsByTagName("TileHeight")[0].InnerText);
if (p_returnType.Equals("json"))
{
JavaScriptSerializer serializer = new JavaScriptSerializer();
return serializer.Serialize(data);
}
else
{
return getSerializedXML(data);
}
}
catch (Exception e)
{
err = new error();
try
{
err.parameter = "identifier";
XmlDocument doc = new XmlDocument();
doc.LoadXml(e.Message);
err.text = doc.GetElementsByTagName("Message")[0].InnerText;
err.statusCode = System.Net.HttpStatusCode.NotFound;
}
catch
{
err.statusCode = System.Net.HttpStatusCode.BadRequest;
err.parameter = "unknown";
err.text = e.Message;
}
return getSerializedXML(err);
}
}