private async Task <string> GetHtmlSourceByPuppeteer(string url)
{
//增加一些状态消息
ShowStatusTextPuppeteer("正在下载Chromium浏览器");
//下载Chromium浏览器
await new PuppeteerSharp.BrowserFetcher().DownloadAsync(PuppeteerSharp.BrowserFetcher.DefaultRevision);
ShowStatusTextPuppeteer("初始化浏览器");
var options = new PuppeteerSharp.LaunchOptions();
var showBrowerFlag = this.cbox_ShowChrome_Puppeteer.IsChecked.Value;
//如果显示浏览器，需要设置为false
options.Headless = showBrowerFlag == true ? false : true;
//启动浏览器
var browser = await PuppeteerSharp.Puppeteer.LaunchAsync(options);
//打开一个标签
var page = await browser.NewPageAsync();
ShowStatusTextPuppeteer($"打开网址{url}");
await page.GoToAsync(url);
var html = await page.GetContentAsync();
//关闭浏览器
browser.Disconnect();
browser.Dispose();
ShowStatusTextPuppeteer("就绪");
return(html);
}
public async Task <IActionResult> ReportSheet(long id, CancellationToken cancellationToken)
{
try
{
var model = await _appDb.MatchRepository.GetMatchReportSheetAsync(_siteContext.MatchPlanTournamentId, id, cancellationToken);
if (model == null)
{
return(NotFound());
}
#region ** Puppeteer PDF generation using Chromium **
var options = new PuppeteerSharp.LaunchOptions
{
Headless = true, Args = new[] { "--no-sandbox", "--disable-gpu", "--disable-extensions" },
ExecutablePath = Path.Combine(Directory.GetCurrentDirectory(), @"Chromium-Win\chrome.exe"), Timeout = 10000
};
// Use Puppeteer as a wrapper for the Chromium browser, which can generate PDF from HTML
using var browser = await PuppeteerSharp.Puppeteer.LaunchAsync(options);
using var page = await browser.NewPageAsync();
// page.GoToAsync("url");
var html = await _razorViewToStringRenderer.RenderViewToStringAsync(
$"~/Views/{nameof(Match)}/{ViewNames.Match.ReportSheet}.cshtml", model);
await page.SetContentAsync(html); // Bootstrap 4 is loaded from CDN
var contentDisposition = new Microsoft.Net.Http.Headers.ContentDispositionHeaderValue("attachment");
contentDisposition.SetHttpFileName($"{_localizer["Report Sheet"].Value} {model.Id}.pdf");
Response.Headers[Microsoft.Net.Http.Headers.HeaderNames.ContentDisposition] = contentDisposition.ToString();
return(new FileStreamResult(await page.PdfStreamAsync(new PuppeteerSharp.PdfOptions {
Scale = 1.0M, Format = PaperFormat.A4
}),
"application/pdf"));
#endregion
// For development: return HTML
// return View(ViewNames.Match.ReportSheet, model);
}
catch (Exception e)
{
_logger.LogCritical(e, $"{nameof(ReportSheet)} failed for match ID '{id}'");
throw;
}
}
public async Task <IActionResult> ReportSheet(long id, CancellationToken cancellationToken)
{
var pathToChromium = Path.Combine(Directory.GetCurrentDirectory(), _configuration["Chromium:ExecutablePath"]);
MatchReportSheetRow model = null;
try
{
model = await _appDb.MatchRepository.GetMatchReportSheetAsync(_tenantContext.TournamentContext.MatchPlanTournamentId, id, cancellationToken);
if (model == null)
{
return(NotFound());
}
if (System.IO.File.Exists(pathToChromium))
{
#region ** Puppeteer PDF generation using Chromium **
var options = new PuppeteerSharp.LaunchOptions
{
// --use-cmd-decoder=passthrough causes Chromium error
Headless = true, Args = new[] { "--no-sandbox", "--disable-gpu", "--disable-extensions", "--use-cmd-decoder=validating" },
ExecutablePath = pathToChromium, Timeout = 10000
};
// Use Puppeteer as a wrapper for the Chromium browser, which can generate PDF from HTML
using var browser = await PuppeteerSharp.Puppeteer.LaunchAsync(options).ConfigureAwait(false);
using var page = await browser.NewPageAsync().ConfigureAwait(false);
// page.GoToAsync("url");
var html = await _razorViewToStringRenderer.RenderViewToStringAsync(
$"~/Views/{nameof(Match)}/{ViewNames.Match.ReportSheet}.cshtml", model);
await page.SetContentAsync(html); // Bootstrap 4 is loaded from CDN
var contentDisposition = new Microsoft.Net.Http.Headers.ContentDispositionHeaderValue("attachment");
contentDisposition.SetHttpFileName($"{_localizer["Report Sheet"].Value} {model.Id}.pdf");
Response.Headers[Microsoft.Net.Http.Headers.HeaderNames.ContentDisposition] =
contentDisposition.ToString();
browser.Process?.Refresh();
_logger.LogInformation(
"Chromium Process physical memory: {0:#,0} bytes. Start arguments: {1}",
browser.Process?.WorkingSet64, browser.Process?.StartInfo.Arguments);
// Test, whether the chromium browser renders at all
/* return new FileStreamResult(
* await page.ScreenshotStreamAsync(new PuppeteerSharp.ScreenshotOptions
* {FullPage = true, Quality = 100, Type = ScreenshotType.Jpeg}).ConfigureAwait(false),
* "image/jpeg");
*/
// Todo: This part works on the development machine, but throws on the external web server
var result = new FileStreamResult(
await page.PdfStreamAsync(new PuppeteerSharp.PdfOptions
{
Scale = 1.0M, Format = PaperFormat.A4
}).ConfigureAwait(false),
"application/pdf");
_logger.LogInformation("PDF stream created with length {0}", result.FileStream.Length);
await browser.CloseAsync();
return(result);
/* Todo: This is a working fallback code, which acts with Chromium directly, and requires the Url to the HTML content
* var tempdir = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
* if (Directory.Exists(tempdir)) Directory.CreateDirectory(tempdir);
* var tempFile = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
* var si = new System.Diagnostics.ProcessStartInfo(pathToChromium,
* $"--disable-background-networking --enable-features=NetworkService,NetworkServiceInProcess --disable-background-timer-throttling --disable-backgrounding-occluded-windows --disable-breakpad --disable-client-side-phishing-detection --disable-component-extensions-with-background-pages --disable-default-apps --disable-dev-shm-usage --disable-extensions --disable-features=TranslateUI --disable-hang-monitor --disable-ipc-flooding-protection --disable-popup-blocking --disable-prompt-on-repost --disable-renderer-backgrounding --disable-sync --force-color-profile=srgb --metrics-recording-only --no-first-run --enable-automation --password-store=basic --use-mock-keychain --headless --hide-scrollbars --mute-audio --no-sandbox --disable-gpu --disable-extensions --use-cmd-decoder=validating --no-margins --user-data-dir={tempdir} --print-to-pdf={tempFile} https://volleyball-liga.de/")
* {CreateNoWindow = true, UseShellExecute = false};
* var proc = System.Diagnostics.Process.Start(si);
* proc.WaitForExit(5000);
* _logger.LogInformation("{0}", proc.ExitCode);
* var stream = System.IO.File.OpenRead(tempFile);
* return new FileStreamResult(stream, "application/pdf");
*/
#endregion
}
}
catch (Exception e)
{
_logger.LogCritical(e, $"{nameof(ReportSheet)} failed for match ID '{id}'");
}
// without Chromium installed or throwing exception: return HTML
Response.Clear();
return(View(ViewNames.Match.ReportSheet, model));
}
