private bool GetHtmlStreamPdfResponse(HtmlStreamPdfRequest pub)
{
IDatabase db = RedisConnection.ConnectionMultiplexer.GetDatabase(_settings.RedisDatabaseKey);
ISubscriber sub = RedisConnection.ConnectionMultiplexer.GetSubscriber();
var elapsedSeconds = 0;
var serialisedObject = Newtonsoft.Json.JsonConvert.SerializeObject(pub);
db.ListLeftPush(RequestSubcriberChannelNames.HtmlStreamPdfRequestQueue, serialisedObject);
sub.Publish(RequestSubcriberChannelNames.HtmlStreamPdfRequestChannel, "");
var value = string.Empty;
while (string.IsNullOrEmpty(value))
{
elapsedSeconds++;
value = db.StringGet(pub.Guid);
if (!string.IsNullOrEmpty(value))
{
db.KeyDelete(pub.Guid, CommandFlags.FireAndForget);
return(value == "Completed");
}
Thread.Sleep(1000);
if (elapsedSeconds == WaitForSeconds)
{
db.KeyDelete(pub.Guid, CommandFlags.FireAndForget);
return(false);
}
}
return(true);
}
public string Generate(StringBuilder htmlStream, string destinationPath, string pdfConverterPath = "", string fileName = "")
{
_destinationPath = destinationPath;
_fileName = string.IsNullOrWhiteSpace(fileName) ? Guid.NewGuid() + ".pdf" : fileName + ".pdf";
/*
* _process = new Process();
* var startInfo = new ProcessStartInfo
* {
* FileName = string.IsNullOrWhiteSpace(pdfConverterPath) ? @"wkhtmltopdf.exe" : pdfConverterPath + @"\wkhtmltopdf.exe",
* Arguments = Switches + " " + "-" + " " + _destinationPath + _fileName,
* UseShellExecute = false, // needs to be false in order to redirect output
* RedirectStandardOutput = true,
* RedirectStandardError = true,
* RedirectStandardInput = true, // redirect all 3, as it should be all 3 or none
* WorkingDirectory = destinationPath
* };
*
*
* _process.StartInfo = startInfo;
* _process.Start();
*
* var streamWriter = _process.StandardInput;
* streamWriter.Write(htmlStream.ToString());
* streamWriter.Close();
*
* // read the output here...
* string output = _process.StandardOutput.ReadToEnd();
*
* // ...then wait n milliseconds for exit (as after exit, it can't read the output)
* _process.WaitForExit(30000);
*
* int returnCode = _process.ExitCode;
*
* _process.Close();
*
* */
var fName = string.IsNullOrWhiteSpace(pdfConverterPath) ? @"wkhtmltopdf.exe" : pdfConverterPath + @"\wkhtmltopdf.exe";
var args = Switches + " " + "-" + " " + _destinationPath + _fileName;
var pub = new HtmlStreamPdfRequest {
FileName = fName, Arguments = args, DestinationPath = _destinationPath, HtmlStream = htmlStream.ToString()
};
var success = GetHtmlStreamPdfResponse(pub);
// if 0, it worked
return((success) ? _fileName : null);
}
