/// <summary>
/// Convert Html to Pdf
/// </summary>
/// <param name="url"> File path or HTTP URL </param>
/// <param name="pdfPath"></param>
public static void ToPdf(string url, string pdfPath)
{
var pdfOutput = new HtmlToPdf.PdfOutput {
OutputFilePath = pdfPath
};
ToPdf(new HtmlToPdf.PdfDocument {
Url = url
}, pdfOutput);
}
/// <summary>
/// Convert Html to Pdf
/// </summary>
/// <param name="url"> File path or HTTP URL </param>
public static byte[] ToPdf(string url)
{
byte[] fileBytes = null;
var pdfOutput = new HtmlToPdf.PdfOutput
{
OutputCallback = (document, bytes) =>
{
fileBytes = bytes;
}
};
ToPdf(new HtmlToPdf.PdfDocument {
Url = url
}, pdfOutput);
return(fileBytes);
}
public static void ToPdf(HtmlToPdf.PdfDocument document, HtmlToPdf.PdfOutput pdfOutput)
{
var environment = new ToolEnvironment
{
TempFolderPath = Path.GetTempPath(),
ToolPath = $"{nameof(HtmlUtils)}/wkhtml/wkhtmltopdf.exe".GetFullPath(null),
Timeout = 60000
};
string outputPdfFilePath;
bool delete;
if (pdfOutput.OutputFilePath != null)
{
outputPdfFilePath = pdfOutput.OutputFilePath;
delete = false;
}
else
{
outputPdfFilePath = Path.Combine(environment.TempFolderPath, $"{Guid.NewGuid():N}.pdf");
delete = true;
}
if (!File.Exists(environment.ToolPath))
{
throw new HtmlConvertException($"File '{environment.ToolPath}' not found. Check if wkhtmltopdf application is installed.");
}
var paramsBuilder = new StringBuilder();
paramsBuilder.AppendFormat("--page-size {0} ", document.PaperType);
if (!string.IsNullOrWhiteSpace(document.HeaderUrl))
{
paramsBuilder.AppendFormat("--header-html {0} ", document.HeaderUrl);
paramsBuilder.Append("--margin-top 25 ");
paramsBuilder.Append("--header-spacing 5 ");
}
if (!string.IsNullOrWhiteSpace(document.FooterUrl))
{
paramsBuilder.AppendFormat("--footer-html {0} ", document.FooterUrl);
paramsBuilder.Append("--margin-bottom 25 ");
paramsBuilder.Append("--footer-spacing 5 ");
}
if (!string.IsNullOrWhiteSpace(document.HeaderLeft))
{
paramsBuilder.AppendFormat("--header-left \"{0}\" ", document.HeaderLeft);
}
if (!string.IsNullOrWhiteSpace(document.HeaderCenter))
{
paramsBuilder.AppendFormat("--header-center \"{0}\" ", document.HeaderCenter);
}
if (!string.IsNullOrWhiteSpace(document.HeaderRight))
{
paramsBuilder.AppendFormat("--header-right \"{0}\" ", document.HeaderRight);
}
if (!string.IsNullOrWhiteSpace(document.FooterLeft))
{
paramsBuilder.AppendFormat("--footer-left \"{0}\" ", document.FooterLeft);
}
if (!string.IsNullOrWhiteSpace(document.FooterCenter))
{
paramsBuilder.AppendFormat("--footer-center \"{0}\" ", document.FooterCenter);
}
if (!string.IsNullOrWhiteSpace(document.FooterRight))
{
paramsBuilder.AppendFormat("--footer-right \"{0}\" ", document.FooterRight);
}
if (!string.IsNullOrWhiteSpace(document.HeaderFontSize))
{
paramsBuilder.AppendFormat("--header-font-size \"{0}\" ", document.HeaderFontSize);
}
if (!string.IsNullOrWhiteSpace(document.FooterFontSize))
{
paramsBuilder.AppendFormat("--footer-font-size \"{0}\" ", document.FooterFontSize);
}
if (!string.IsNullOrWhiteSpace(document.HeaderFontName))
{
paramsBuilder.AppendFormat("--header-font-name \"{0}\" ", document.HeaderFontName);
}
if (!string.IsNullOrWhiteSpace(document.FooterFontName))
{
paramsBuilder.AppendFormat("--footer-font-name \"{0}\" ", document.FooterFontName);
}
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.ToolPath;
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))
{
DataReceivedEventHandler outputHandler = (sender, e) =>
{
if (e.Data == null)
{
outputWaitHandle.Set();
}
else
{
output.AppendLine(e.Data);
}
};
DataReceivedEventHandler errorHandler = (sender, 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 (process.WaitForExit(environment.Timeout) && outputWaitHandle.WaitOne(environment.Timeout) && errorWaitHandle.WaitOne(environment.Timeout))
{
if (process.ExitCode != 0 && !File.Exists(outputPdfFilePath))
{
throw new HtmlConvertException($"Html to PDF conversion of '{document.Url}' failed. Wkhtmltopdf output: \r\n{error}");
}
}
else
{
if (!process.HasExited)
{
process.Kill();
}
throw new HtmlConvertTimeoutException();
}
}
finally
{
process.OutputDataReceived -= outputHandler;
process.ErrorDataReceived -= errorHandler;
}
}
}
if (pdfOutput.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)
{
pdfOutput.OutputStream.Write(buffer, 0, read);
}
}
}
if (pdfOutput.OutputCallback != null)
{
byte[] pdfFileBytes = File.ReadAllBytes(outputPdfFilePath);
pdfOutput.OutputCallback(document, pdfFileBytes);
}
}
finally
{
if (delete && File.Exists(outputPdfFilePath))
{
FileHelper.SafeDelete(outputPdfFilePath);
}
}
}
