public IAsyncResult BeginProcessRequest(HttpContext context, AsyncCallback cb, Object extraData)
{
_context = context;
ImageRequestState state = new ImageRequestState();
string quality = "";
string format = "png";
int dotPos = context.Request["quality_format"].IndexOf(".");
if (dotPos != -1)
{
quality = context.Request["quality_format"].Substring(0, dotPos);
format = context.Request["quality_format"].Substring(dotPos + 1);
}
else
{
quality = context.Request["quality_format"];
}
if (string.IsNullOrEmpty(context.Request["identifier"]) || string.IsNullOrEmpty(context.Request["size"]) ||
string.IsNullOrEmpty(context.Request["region"]) || string.IsNullOrEmpty(quality) ||
string.IsNullOrEmpty(context.Request["rotation"]))
{
state.err = new error();
if (string.IsNullOrEmpty(context.Request["identifier"]))
{
state.err.parameter = ", identifier";
}
if (string.IsNullOrEmpty(context.Request["size"]))
{
state.err.parameter += ", size";
}
if (string.IsNullOrEmpty(context.Request["region"]))
{
state.err.parameter += ", region";
}
if (string.IsNullOrEmpty(context.Request["rotation"]))
{
state.err.parameter += ", rotation";
}
if (string.IsNullOrEmpty(quality))
{
state.err.parameter += ", quality";
}
if (string.IsNullOrEmpty(context.Request["format"]))
{
state.err.parameter += ", format";
}
state.err.parameter = state.err.parameter.Substring(2);
state.err.text = "missing " + state.err.parameter;
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
string size = context.Request["size"];
if (state.err == null && !string.IsNullOrEmpty(size))
{
if (size.EndsWith(","))
{
state.sizeType = "resize";
state.width = size.Replace(",", "");
if (!string.IsNullOrEmpty(state.width) && int.Parse(state.width) < 1)
{
state.err = new error();
state.err.parameter = "size";
state.err.text = "Invalid size specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
}
else if (size.StartsWith(","))
{
state.sizeType = "resize";
state.height = size.Replace(",", "");
if (!string.IsNullOrEmpty(state.height) && int.Parse(state.height) < 1)
{
state.err = new error();
state.err.parameter = "size";
state.err.text = "Invalid size specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
}
else if (size.Equals("full"))
{
state.sizeType = "proportion";
state.size = "1";
}
else if (size.StartsWith("pct:"))
{
state.sizeType = "proportion";
state.size = (double.Parse(size.Replace("pct:", "")) / 100).ToString();
if (!string.IsNullOrEmpty(state.size) && double.Parse(state.size) <= 0)
{
state.err = new error();
state.err.parameter = "size";
state.err.text = "Invalid size specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
}
else if (size.StartsWith("!"))
{
Regex r = new Regex(@"!(?<w>\d+),(?<h>\d+)");
Match m = r.Match(size);
state.sizeType = "best";
state.width = m.Groups["w"].Value;
state.height = m.Groups["h"].Value;
if ((!string.IsNullOrEmpty(state.width) && int.Parse(state.width) < 1) ||
(!string.IsNullOrEmpty(state.height) && int.Parse(state.height) < 1))
{
state.err = new error();
state.err.parameter = "size";
state.err.text = "Invalid size specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
}
else
{
Regex r = new Regex(@"(?<w>\d+),(?<h>\d+)");
Match m = r.Match(size);
state.sizeType = "resize";
state.width = m.Groups["w"].Value;
state.height = m.Groups["h"].Value;
if ((!string.IsNullOrEmpty(state.width) && int.Parse(state.width) < 1) ||
(!string.IsNullOrEmpty(state.height) && int.Parse(state.height) < 1))
{
state.err = new error();
state.err.parameter = "size";
state.err.text = "Invalid size specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
}
if (string.IsNullOrEmpty(state.sizeType) || (string.IsNullOrEmpty(state.size) && string.IsNullOrEmpty(state.height) && string.IsNullOrEmpty(state.width)))
{
state.err = new error();
state.err.parameter = "size";
state.err.text = "Invalid size specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
}
string region = context.Request["region"];
if (state.err == null && !string.IsNullOrEmpty(region))
{
if (context.Request["region"].Equals("full"))
{
state.region = "all";
}
else if (region.StartsWith("pct:"))
{
Regex r = new Regex(@"pct:(?<x>(\d+|\d+\.\d+)),(?<y>(\d+|\d+\.\d+)),(?<w>(\d+|\d+\.\d+)),(?<h>(\d+|\d+\.\d+))");
Match m = r.Match(region);
double y = Convert.ToDouble(m.Groups["y"].Value) / 100;
double x = Convert.ToDouble(m.Groups["x"].Value) / 100;
double h = Convert.ToDouble(m.Groups["h"].Value) / 100;
double w = Convert.ToDouble(m.Groups["w"].Value) / 100;
state.region = "%" + x + "," + y + "," + w + "," + h;
state.regionHeight = h.ToString();
state.regionWidth = w.ToString();
if ((!string.IsNullOrEmpty(state.regionWidth) && Convert.ToDouble(state.regionWidth) <= 0) ||
(!string.IsNullOrEmpty(state.regionHeight) && Convert.ToDouble(state.regionHeight) <= 0))
{
state.err = new error();
state.err.parameter = "region";
state.err.text = "Invalid region specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
}
else
{
Regex r = new Regex(@"(?<x>\d+),(?<y>\d+),(?<w>\d+),(?<h>\d+)");
Match m = r.Match(region);
state.region = m.Groups["x"].Value + "," + m.Groups["y"].Value + "," + m.Groups["w"].Value + "," + m.Groups["h"].Value;
state.regionHeight = m.Groups["h"].Value;
state.regionWidth = m.Groups["w"].Value;
if (state.sizeType.Equals("proportion"))
{
if (!string.IsNullOrEmpty(state.regionWidth) && Convert.ToInt32(state.regionWidth) * Convert.ToDouble(state.size) < 1)
{
state.err = new error();
state.err.parameter = "region";
state.err.text = "Invalid region specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
else if (!string.IsNullOrEmpty(state.regionHeight) && Convert.ToInt32(state.regionHeight) * Convert.ToDouble(state.size) < 1)
{
state.err = new error();
state.err.parameter = "region";
state.err.text = "Invalid region specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
}
if ((!string.IsNullOrEmpty(state.regionWidth) && int.Parse(state.regionWidth) < 1) ||
(!string.IsNullOrEmpty(state.regionHeight) && int.Parse(state.regionHeight) < 1))
{
state.err = new error();
state.err.parameter = "region";
state.err.text = "Invalid region specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
}
if (string.IsNullOrEmpty(state.region.Replace(",", "")))
{
state.err = new error();
state.err.parameter = "region";
state.err.text = "Invalid region specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
}
if (state.err == null && !string.IsNullOrEmpty(quality))
{
switch (quality)
{
case "grey": quality = "grey"; break;
case "bitonal": quality = "bitonal"; break;
case "color": quality = "color"; break;
case "native": quality = "native"; break;
default:
state.err = new error();
state.err.parameter = "quality";
state.err.text = "only native, color, grey, bitonal supported";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
break;
}
}
string rotate = context.Request["rotation"];
if (state.err == null && !string.IsNullOrEmpty(rotate))
{
switch (rotate)
{
case "90":
case "180":
case "270":
state.rotation = rotate; break;
default:
int temp = 0;
if (int.TryParse(rotate, out temp))
{
state.rotation = temp.ToString();
}
else
{
state.err = new error();
state.err.parameter = "rotation";
state.err.text = "only 0, 90, 180, 270 are accepted rotation values";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
break;
}
}
if (state.err == null && !string.IsNullOrEmpty(format))
{
switch (format)
{
case "jpg": format = "jpg"; break;
case "png": format = "png"; break;
case "gif": format = "gif"; break;
case "jp2":
case "pdf":
default:
state.err = new error();
state.err.parameter = "format";
state.err.text = format + " not supported";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
break; // no format matched
}
}
state.identifier = context.Request["identifier"];
state.rotation = context.Request["rotation"];
state.quality = quality;
state.format = format;
asynch = new ImageAsynchResult(cb, context, state);
getImage = new GetImageDelegate(GetImage);
getImage.BeginInvoke(asynch, null, state);
return(asynch);
}
public IAsyncResult BeginProcessRequest(HttpContext context, AsyncCallback cb, Object extraData)
{
_context = context;
ImageRequestState state = new ImageRequestState();
string quality = "";
string format = "png";
int dotPos = context.Request["quality_format"].IndexOf(".");
if (dotPos != -1)
{
quality = context.Request["quality_format"].Substring(0, dotPos);
format = context.Request["quality_format"].Substring(dotPos + 1);
}
else
{
quality = context.Request["quality_format"];
}
if (string.IsNullOrEmpty(context.Request["identifier"]) || string.IsNullOrEmpty(context.Request["size"]) ||
string.IsNullOrEmpty(context.Request["region"]) || string.IsNullOrEmpty(quality) ||
string.IsNullOrEmpty(context.Request["rotation"]))
{
state.err = new error();
if (string.IsNullOrEmpty(context.Request["identifier"]))
state.err.parameter = ", identifier";
if (string.IsNullOrEmpty(context.Request["size"]))
state.err.parameter += ", size";
if (string.IsNullOrEmpty(context.Request["region"]))
state.err.parameter += ", region";
if (string.IsNullOrEmpty(context.Request["rotation"]))
state.err.parameter += ", rotation";
if (string.IsNullOrEmpty(quality))
state.err.parameter += ", quality";
if (string.IsNullOrEmpty(context.Request["format"]))
state.err.parameter += ", format";
state.err.parameter = state.err.parameter.Substring(2);
state.err.text = "missing " + state.err.parameter;
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
string size = context.Request["size"];
if (state.err == null && !string.IsNullOrEmpty(size))
{
if (size.EndsWith(","))
{
state.sizeType = "resize";
state.width = size.Replace(",", "");
if (!string.IsNullOrEmpty(state.width) && int.Parse(state.width) < 1)
{
state.err = new error();
state.err.parameter = "size";
state.err.text = "Invalid size specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
}
else if (size.StartsWith(","))
{
state.sizeType = "resize";
state.height = size.Replace(",", "");
if (!string.IsNullOrEmpty(state.height) && int.Parse(state.height) < 1)
{
state.err = new error();
state.err.parameter = "size";
state.err.text = "Invalid size specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
}
else if (size.Equals("full"))
{
state.sizeType = "proportion";
state.size = "1";
}
else if (size.StartsWith("pct:"))
{
state.sizeType = "proportion";
state.size = (double.Parse(size.Replace("pct:", "")) / 100).ToString();
if (!string.IsNullOrEmpty(state.size) && double.Parse(state.size) <= 0)
{
state.err = new error();
state.err.parameter = "size";
state.err.text = "Invalid size specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
}
else if (size.StartsWith("!"))
{
Regex r = new Regex(@"!(?<w>\d+),(?<h>\d+)");
Match m = r.Match(size);
state.sizeType = "best";
state.width = m.Groups["w"].Value;
state.height = m.Groups["h"].Value;
if ((!string.IsNullOrEmpty(state.width) && int.Parse(state.width) < 1) ||
(!string.IsNullOrEmpty(state.height) && int.Parse(state.height) < 1))
{
state.err = new error();
state.err.parameter = "size";
state.err.text = "Invalid size specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
}
else
{
Regex r = new Regex(@"(?<w>\d+),(?<h>\d+)");
Match m = r.Match(size);
state.sizeType = "resize";
state.width = m.Groups["w"].Value;
state.height = m.Groups["h"].Value;
if ((!string.IsNullOrEmpty(state.width) && int.Parse(state.width) < 1) ||
(!string.IsNullOrEmpty(state.height) && int.Parse(state.height) < 1))
{
state.err = new error();
state.err.parameter = "size";
state.err.text = "Invalid size specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
}
if (string.IsNullOrEmpty(state.sizeType) || (string.IsNullOrEmpty(state.size) && string.IsNullOrEmpty(state.height) && string.IsNullOrEmpty(state.width)))
{
state.err = new error();
state.err.parameter = "size";
state.err.text = "Invalid size specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
}
string region = context.Request["region"];
if (state.err == null && !string.IsNullOrEmpty(region))
{
if (context.Request["region"].Equals("full"))
{
state.region = "all";
}
else if (region.StartsWith("pct:"))
{
Regex r = new Regex(@"pct:(?<x>(\d+|\d+\.\d+)),(?<y>(\d+|\d+\.\d+)),(?<w>(\d+|\d+\.\d+)),(?<h>(\d+|\d+\.\d+))");
Match m = r.Match(region);
double y = Convert.ToDouble(m.Groups["y"].Value) / 100;
double x = Convert.ToDouble(m.Groups["x"].Value) / 100;
double h = Convert.ToDouble(m.Groups["h"].Value) / 100;
double w = Convert.ToDouble(m.Groups["w"].Value) / 100;
state.region = "%" + x + "," + y + "," + w + "," + h;
state.regionHeight = h.ToString();
state.regionWidth = w.ToString();
if ((!string.IsNullOrEmpty(state.regionWidth) && Convert.ToDouble(state.regionWidth) <= 0) ||
(!string.IsNullOrEmpty(state.regionHeight) && Convert.ToDouble(state.regionHeight) <= 0))
{
state.err = new error();
state.err.parameter = "region";
state.err.text = "Invalid region specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
}
else
{
Regex r = new Regex(@"(?<x>\d+),(?<y>\d+),(?<w>\d+),(?<h>\d+)");
Match m = r.Match(region);
state.region = m.Groups["x"].Value + "," + m.Groups["y"].Value + "," + m.Groups["w"].Value + "," + m.Groups["h"].Value;
state.regionHeight = m.Groups["h"].Value;
state.regionWidth = m.Groups["w"].Value;
if (state.sizeType.Equals("proportion"))
{
if (!string.IsNullOrEmpty(state.regionWidth) && Convert.ToInt32(state.regionWidth) * Convert.ToDouble(state.size) < 1)
{
state.err = new error();
state.err.parameter = "region";
state.err.text = "Invalid region specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
else if (!string.IsNullOrEmpty(state.regionHeight) && Convert.ToInt32(state.regionHeight) * Convert.ToDouble(state.size) < 1)
{
state.err = new error();
state.err.parameter = "region";
state.err.text = "Invalid region specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
}
if ((!string.IsNullOrEmpty(state.regionWidth) && int.Parse(state.regionWidth) < 1) ||
(!string.IsNullOrEmpty(state.regionHeight) && int.Parse(state.regionHeight) < 1))
{
state.err = new error();
state.err.parameter = "region";
state.err.text = "Invalid region specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
}
if (string.IsNullOrEmpty(state.region.Replace(",", "")))
{
state.err = new error();
state.err.parameter = "region";
state.err.text = "Invalid region specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
}
if (state.err == null && !string.IsNullOrEmpty(quality))
{
switch (quality)
{
case "grey": quality = "grey"; break;
case "bitonal": quality = "bitonal"; break;
case "color": quality = "color"; break;
case "native": quality = "native"; break;
default:
state.err = new error();
state.err.parameter = "quality";
state.err.text = "only native, color, grey, bitonal supported";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
break;
}
}
string rotate = context.Request["rotation"];
if (state.err == null && !string.IsNullOrEmpty(rotate))
{
switch (rotate)
{
case "90":
case "180":
case "270":
state.rotation = rotate; break;
default:
int temp = 0;
if (int.TryParse(rotate, out temp))
{
state.rotation = temp.ToString();
}
else
{
state.err = new error();
state.err.parameter = "rotation";
state.err.text = "only 0, 90, 180, 270 are accepted rotation values";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
break;
}
}
if (state.err == null && !string.IsNullOrEmpty(format))
{
switch (format)
{
case "jpg": format = "jpg"; break;
case "png": format = "png"; break;
case "gif": format = "gif"; break;
case "jp2":
case "pdf":
default:
state.err = new error();
state.err.parameter = "format";
state.err.text = format + " not supported";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
break; // no format matched
}
}
state.identifier = context.Request["identifier"];
state.rotation = context.Request["rotation"];
state.quality = quality;
state.format = format;
asynch = new ImageAsynchResult(cb, context, state);
getImage = new GetImageDelegate(GetImage);
getImage.BeginInvoke(asynch, null, state);
return asynch;
}