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case 4690 - report browser: launch chrome-headless-shell; writable config/cache folders for the browser; Ubuntu 24.04 droplet results

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Full Chrome 155 would not start under a Linux service user with no writable
home (chrome_crashpad_handler: --database is required). chrome-headless-shell
starts, and measured on a 1 GB droplet is 3-4x faster and smaller per render.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
John Cardinal
2026-10-23 08:12:21 -07:00
parent b76cf098b7
commit bf0555fb31
2 changed files with 33 additions and 5 deletions
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29
server/AyaNova/biz/ReportBiz.cs
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@@ -795,8 +795,11 @@ What could be the issue here?
//case 4586
//puppeteer has gone chrome dev by default and so does puppeteersharp which tests ok so I'm going to allow the default
//this means the files go into Chrome and ChromeHeadlessShell folders, under the data path (not beside the app, see ServerBootConfig)
var FetcherOptions = new BrowserFetcherOptions();
//this means the files go into a ChromeHeadlessShell folder, under the data path (not beside the app, see ServerBootConfig)
//chrome-headless-shell, not full Chrome: it is Chrome's headless-only build for automation and PDF printing.
//Measured on a 1GB Ubuntu droplet printing a report-sized page: about 1s and 620MB vs 4.5s and 1.6GB for full Chrome,
//and a browser is started for every report render. Full Chrome also failed to start under a service user with no writable home
var FetcherOptions = new BrowserFetcherOptions { Browser = SupportedBrowser.ChromeHeadlessShell };
if (!string.IsNullOrWhiteSpace(ServerBootConfig.REPORT_RENDER_BROWSER_DOWNLOAD_PATH))
FetcherOptions.Path = ServerBootConfig.REPORT_RENDER_BROWSER_DOWNLOAD_PATH;
try
@@ -804,6 +807,7 @@ What could be the issue here?
var InstalledBrowser = await new BrowserFetcher(FetcherOptions).DownloadAsync();
//launch exactly what was downloaded, otherwise Puppeteer looks in its default folder beside the app
lo.ExecutablePath = InstalledBrowser.GetExecutablePath();
lo.HeadlessMode = HeadlessMode.Shell;
log.LogDebug($"Report browser: {lo.ExecutablePath}");
}
catch (Exception ex)
@@ -856,6 +860,27 @@ What could be the issue here?
{
lo.Args = lo.Args.Append($"--lang={ServerLanguage}").ToArray();
}
//Chrome keeps config and crash-reporter files under the user's home folder and fails to start when it isn't writable,
//as for a Linux service user like www-data (home /var/www). Point it at folders we own instead; harmless on Windows.
//Matters mostly for a full Chrome given in AYANOVA_REPORT_RENDER_BROWSER_PATH, chrome-headless-shell starts without them
var BrowserWorkFolder = Path.Combine(
string.IsNullOrWhiteSpace(ServerBootConfig.REPORT_RENDER_BROWSER_DOWNLOAD_PATH)
? ServerBootConfig.AYANOVA_TEMP_FILES_PATH
: ServerBootConfig.REPORT_RENDER_BROWSER_DOWNLOAD_PATH,
"browser-home"
);
try
{
Directory.CreateDirectory(Path.Combine(BrowserWorkFolder, "config"));
Directory.CreateDirectory(Path.Combine(BrowserWorkFolder, "cache"));
lo.Env["XDG_CONFIG_HOME"] = Path.Combine(BrowserWorkFolder, "config");
lo.Env["XDG_CACHE_HOME"] = Path.Combine(BrowserWorkFolder, "cache");
}
catch (Exception ex)
{
//not fatal, the launch below reports any real problem
log.LogWarning(ex, $"Could not create report browser work folders under {BrowserWorkFolder}");
}
log.LogDebug($"Report browser launch arguments: '{string.Join(" ", lo.Args)}'");
System.Text.StringBuilder PageLog = new System.Text.StringBuilder();