public static void ConvertHtmlToPdf(PdfDocument document, PdfConvertEnvironment environment, PdfOutput woutput)
{
if (environment == null)
{
environment = Environment;
}
if (document.Html != null)
{
document.Url = "-";
}
string outputPdfFilePath;
bool delete;
if (woutput.OutputFilePath != null)
{
outputPdfFilePath = woutput.OutputFilePath;
delete = false;
}
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. Check if wkhtmltopdf application is installed.", environment.WkHtmlToPdfPath));
}
StringBuilder 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 ");
}
if (!string.IsNullOrEmpty(document.HeaderLeft))
{
paramsBuilder.AppendFormat("--header-left \"{0}\" ", document.HeaderLeft);
}
if (!string.IsNullOrEmpty(document.HeaderCenter))
{
paramsBuilder.AppendFormat("--header-center \"{0}\" ", document.HeaderCenter);
}
if (!string.IsNullOrEmpty(document.HeaderRight))
{
paramsBuilder.AppendFormat("--header-right \"{0}\" ", document.HeaderRight);
}
if (!string.IsNullOrEmpty(document.FooterLeft))
{
paramsBuilder.AppendFormat("--footer-left \"{0}\" ", document.FooterLeft);
}
if (!string.IsNullOrEmpty(document.FooterCenter))
{
paramsBuilder.AppendFormat("--footer-center \"{0}\" ", document.FooterCenter);
}
if (!string.IsNullOrEmpty(document.FooterRight))
{
paramsBuilder.AppendFormat("--footer-right \"{0}\" ", document.FooterRight);
}
if (document.ExtraParams != null)
{
foreach (var extraParam in document.ExtraParams)
{
paramsBuilder.AppendFormat("--{0} {1} ", extraParam.Key, extraParam.Value);
}
}
if (document.Cookies != null)
{
foreach (var cookie in document.Cookies)
{
paramsBuilder.AppendFormat("--cookie {0} {1} ", cookie.Key, cookie.Value);
}
}
paramsBuilder.AppendFormat("\"{0}\" \"{1}\"", document.Url, outputPdfFilePath);
try
{
StringBuilder output = new StringBuilder();
StringBuilder error = new StringBuilder();
using (Process process = new Process())
{
process.StartInfo.FileName = environment.WkHtmlToPdfPath;
process.StartInfo.Arguments = paramsBuilder.ToString();
process.StartInfo.UseShellExecute = false;
process.StartInfo.RedirectStandardOutput = true;
process.StartInfo.RedirectStandardError = true;
process.StartInfo.RedirectStandardInput = true;
using AutoResetEvent outputWaitHandle = new AutoResetEvent(false);
using AutoResetEvent errorWaitHandle = new AutoResetEvent(false);
void outputHandler(object sender, DataReceivedEventArgs e)
{
if (e.Data == null)
{
outputWaitHandle.Set();
}
else
{
output.AppendLine(e.Data);
}
}
void errorHandler(object sender, DataReceivedEventArgs e)
{
if (e.Data == null)
{
errorWaitHandle.Set();
}
else
{
error.AppendLine(e.Data);
}
}
process.OutputDataReceived += outputHandler;
process.ErrorDataReceived += errorHandler;
try
{
process.Start();
process.BeginOutputReadLine();
process.BeginErrorReadLine();
if (document.Html != null)
{
using var stream = process.StandardInput;
byte[] buffer = Encoding.UTF8.GetBytes(document.Html);
stream.BaseStream.Write(buffer, 0, buffer.Length);
stream.WriteLine();
}
if (process.WaitForExit(environment.Timeout) && outputWaitHandle.WaitOne(environment.Timeout) && errorWaitHandle.WaitOne(environment.Timeout))
{
if (process.ExitCode != 0 && !File.Exists(outputPdfFilePath))
{
throw new PdfConvertException(string.Format("Html to PDF conversion of '{0}' failed. Wkhtmltopdf output: \r\n{1}", document.Url, error));
}
}
else
{
if (!process.HasExited)
{
process.Kill();
}
throw new PdfConvertTimeoutException();
}
}
finally
{
process.OutputDataReceived -= outputHandler;
process.ErrorDataReceived -= errorHandler;
}
}
if (woutput.OutputStream != null)
{
using Stream fs = new FileStream(outputPdfFilePath, FileMode.Open);
byte[] buffer = new byte[32 * 1024];
int read;
while ((read = fs.Read(buffer, 0, buffer.Length)) > 0)
{
woutput.OutputStream.Write(buffer, 0, read);
}
}
if (woutput.OutputCallback != null)
{
byte[] pdfFileBytes = File.ReadAllBytes(outputPdfFilePath);
woutput.OutputCallback(document, pdfFileBytes);
}
}
finally
{
if (delete && File.Exists(outputPdfFilePath))
{
File.Delete(outputPdfFilePath);
}
}
}
public static void ConvertHtmlToPdf(PdfDocument document, PdfOutput output)
{
ConvertHtmlToPdf(document, null, output);
}
