/// <summary>
/// Instructs Chrome to print the page
/// </summary>
/// <param name="pageSettings"><see cref="PageSettings" /></param>
/// <param name="countdownTimer">If a <see cref="CountdownTimer"/> is set then
/// the method will raise an <see cref="ConversionTimedOutException"/> in the
/// <see cref="CountdownTimer"/> reaches zero before finishing the printing to pdf</param>
/// <remarks>
/// See https://chromedevtools.github.io/devtools-protocol/tot/Page/#method-printToPDF
/// </remarks>
/// <exception cref="ConversionException">Raised when Chrome returns an empty string</exception>
/// <exception cref="ConversionTimedOutException">Raised when <paramref name="countdownTimer"/> reaches zero</exception>
internal PrintToPdfResponse PrintToPdf(PageSettings pageSettings, CountdownTimer countdownTimer = null)
{
var message = new Message {
Method = "Page.printToPDF"
};
message.AddParameter("landscape", pageSettings.Landscape);
message.AddParameter("displayHeaderFooter", pageSettings.DisplayHeaderFooter);
message.AddParameter("printBackground", pageSettings.PrintBackground);
message.AddParameter("scale", pageSettings.Scale);
message.AddParameter("paperWidth", pageSettings.PaperWidth);
message.AddParameter("paperHeight", pageSettings.PaperHeight);
message.AddParameter("marginTop", pageSettings.MarginTop);
message.AddParameter("marginBottom", pageSettings.MarginBottom);
message.AddParameter("marginLeft", pageSettings.MarginLeft);
message.AddParameter("marginRight", pageSettings.MarginRight);
message.AddParameter("pageRanges", pageSettings.PageRanges ?? string.Empty);
message.AddParameter("ignoreInvalidPageRanges", pageSettings.IgnoreInvalidPageRanges);
var result = countdownTimer == null
? _pageConnection.SendAsync(message).GetAwaiter().GetResult()
: _pageConnection.SendAsync(message).Timeout(countdownTimer.MillisecondsLeft).GetAwaiter().GetResult();
var printToPdfResponse = PrintToPdfResponse.FromJson(result);
if (string.IsNullOrEmpty(printToPdfResponse.Result?.Data))
{
throw new ConversionException("Conversion failed");
}
return(printToPdfResponse);
}
/// <summary>
/// Instructs Chrome to print the page
/// </summary>
/// <param name="pageSettings"><see cref="PageSettings"/></param>
/// <remarks>
/// See https://chromedevtools.github.io/devtools-protocol/tot/Page/#method-printToPDF
/// </remarks>
/// <returns>
/// <code>
/// var uri = new Uri("http://www.google.nl");
/// var result = NavigateTo(uri);
/// // Succes when value contains the Uri result.InnerResult.Value
/// // contains the requested uri.
/// if (result.Result.ExceptionDetails != null)
/// throw new Exception("Navigation failed");
/// </code>
/// </returns>
/// <exception cref="ChromeException">Raised when an error is returned by Chrome</exception>
internal PrintToPdfResponse PrintToPdf(PageSettings pageSettings)
{
var message = new Message
{
Id = MessageId,
Method = "Page.printToPDF"
};
message.AddParameter("landscape", pageSettings.Landscape);
message.AddParameter("displayHeaderFooter", pageSettings.DisplayHeaderFooter);
message.AddParameter("printBackground", pageSettings.PrintBackground);
message.AddParameter("scale", pageSettings.Scale);
message.AddParameter("paperWidth", pageSettings.PaperWidth);
message.AddParameter("paperHeight", pageSettings.PaperHeight);
message.AddParameter("marginTop", pageSettings.MarginTop);
message.AddParameter("marginBottom", pageSettings.MarginBottom);
message.AddParameter("marginLeft", pageSettings.MarginLeft);
message.AddParameter("marginRight", pageSettings.MarginRight);
message.AddParameter("pageRanges", pageSettings.PageRanges);
message.AddParameter("ignoreInvalidPageRanges", pageSettings.IgnoreInvalidPageRanges);
var converted = false;
PrintToPdfResponse response = null;
_webSocket.MessageReceived += (sender, args) =>
{
response = PrintToPdfResponse.FromJson(args.Message);
if (response.Result?.Data != null)
{
converted = true;
}
};
WebSocketSend(message.ToJson());
while (!converted)
{
Thread.Sleep(1);
}
return(response);
}