public static void ConvertHtmlToPdf(PdfDocument document, PdfConvertEnvironment environment, PdfOutput woutput)
{
if (environment == null)
environment = Environment;
String outputPdfFilePath;
bool delete = false;
if (woutput.OutputFilePath != null)
outputPdfFilePath = woutput.OutputFilePath;
else
{
outputPdfFilePath = Path.Combine(environment.TempFolderPath, String.Format("{0}.pdf", Guid.NewGuid()));
delete = true;
}
if (!File.Exists(environment.WkHtmlToPdfPath))
throw new PdfConvertException(String.Format("File '{0}' not found. Make sure wkhtmltopdf files exist.", environment.WkHtmlToPdfPath));
var paramsBuilder = BuildParameters(document, outputPdfFilePath);
var si = new ProcessStartInfo
{
CreateNoWindow = !environment.Debug,
FileName = environment.WkHtmlToPdfPath,
Arguments = paramsBuilder.ToString(),
UseShellExecute = false,
RedirectStandardError = !environment.Debug
};
try
{
using (var process = new Process())
{
ProcessHtmlToPdf(si, process, environment, document);
if (!File.Exists(outputPdfFilePath))
throw new PdfConvertException(String.Format("Html to PDF conversion of '{0}' failed. Reason: Output file '{1}' not found.", document.Url, outputPdfFilePath));
WriteOutput(woutput, outputPdfFilePath);
ExecuteCallback(document, woutput, outputPdfFilePath);
}
}
finally
{
if (delete && File.Exists(outputPdfFilePath))
File.Delete(outputPdfFilePath);
}
}
private static StringBuilder BuildParameters(PdfDocument document, string outputPdfFilePath)
{
var paramsBuilder = new StringBuilder();
paramsBuilder.Append("--page-size A4 ");
if (!string.IsNullOrEmpty(document.HeaderUrl))
{
paramsBuilder.AppendFormat("--header-html {0} ", document.HeaderUrl);
paramsBuilder.Append("--margin-top 25 ");
paramsBuilder.Append("--header-spacing 5 ");
}
if (!string.IsNullOrEmpty(document.FooterUrl))
{
paramsBuilder.AppendFormat("--footer-html {0} ", document.FooterUrl);
paramsBuilder.Append("--margin-bottom 25 ");
paramsBuilder.Append("--footer-spacing 5 ");
}
paramsBuilder.AppendFormat("\"{0}\" \"{1}\"", document.Url, outputPdfFilePath);
return paramsBuilder;
}
private static void ProcessHtmlToPdf(ProcessStartInfo si, Process process, PdfConvertEnvironment environment, PdfDocument document)
{
process.StartInfo = si;
process.Start();
if (!process.WaitForExit(environment.Timeout))
throw new PdfConvertTimeoutException();
if (process.ExitCode != 0)
{
var error = si.RedirectStandardError ? process.StandardError.ReadToEnd() : String.Format("Process exited with code {0}.", process.ExitCode);
throw new PdfConvertException(String.Format("Html to PDF conversion of '{0}' failed. Wkhtmltopdf output: \r\n{1}", document.Url, error));
}
}
public static void ConvertHtmlToPdf(PdfDocument document, PdfOutput output)
{
ConvertHtmlToPdf(document, null, output);
}
private static void ExecuteCallback(PdfDocument document, PdfOutput woutput, string outputPdfFilePath)
{
if (woutput.OutputCallback != null)
{
woutput.OutputCallback(document, File.ReadAllBytes(outputPdfFilePath));
}
}