/// <summary>
/// Convert StringBuilder to Stream.
/// Depending on the size, appropriate stream will be used.
/// </summary>
/// <param name="sb">string builder</param>
/// <returns>utf8 stream</returns>
public static Stream ToStream(this StringBuilder sb)
{
if (sb.Length < 8192)
{
return(new MemoryStream(Encoding.UTF8.GetBytes(sb.ToString())));
}
var cms = ChunkedMemoryStream.Create();
var sw = new StreamWriter(cms);
sw.WriteBuilder(sb);
sw.Flush();
cms.Position = 0;
return(cms);
}
/// <summary>
/// Convert provided stream content to pdf.
/// Specify extension of the file
/// </summary>
/// <param name="content">file content</param>
/// <param name="ext">file extension</param>
/// <param name="disposeStream">dispose provided stream after conversion</param>
/// <returns>pdf converted stream</returns>
public static Stream Convert(Stream content, string ext, bool disposeStream)
{
var from = TemporaryResources.CreateFile(ext);
var to = from + ".pdf";
var fs = new FileStream(from, FileMode.Create, FileAccess.Write);
content.CopyTo(fs);
fs.Close();
if (disposeStream)
{
content.Dispose();
}
RunConverter(from);
var cms = ChunkedMemoryStream.Create();
using (var f = new FileStream(to, FileMode.Open, FileAccess.Read))
{
f.CopyTo(cms);
}
File.Delete(from);
File.Delete(to);
cms.Position = 0;
return(cms);
}
/// <summary>
/// Convert string builder to base64 stream.
/// Depending on the size, appropriate method will be used to avoid LOH issues.
/// </summary>
/// <param name="sb">string builder</param>
/// <returns>base64 encoded stream</returns>
public static Stream ToBase64Stream(this StringBuilder sb)
{
if (sb.Length < 8192)
{
return(new MemoryStream(Encoding.UTF8.GetBytes(Convert.ToBase64String(Encoding.UTF8.GetBytes(sb.ToString())))));
}
using (var cms = ChunkedMemoryStream.Create())
using (var sw = new StreamWriter(cms))
{
var len = sb.Length / 4096;
var pos = 0;
for (int i = 0; i < len; i++, pos += 4096)
{
sw.Write(sb.ToString(pos, 4096));
}
if (sb.Length > pos)
{
sw.Write(sb.ToString(pos, sb.Length - pos));
}
sw.Flush();
cms.Position = 0;
return(cms.ToBase64Stream());
}
}
public CustomWriter(ChunkedMemoryStream cms)
: base(cms)
{
}