static BrowserRender()
{
GlobalEventSystemFacade.SubscribeToShutDownEvent(a => ShutdownPhantomJsExeSilent());
PackageInstaller.OnPackageInstallation += ShutdownPhantomJsExeSilent;
FileChangeNotificator.Subscribe(PhantomServer.ScriptFilePath, (a, b) => PhantomServer.ShutDown(false));
}
private static void RecycleIfNotUsed()
{
if (DateTime.Now - _lastUsageDate < RecycleOnIdleInterval)
{
return;
}
PhantomServer.ShutDown(false);
}
private static void ShutdownPhantomJsExeSilent()
{
Enabled = false;
try
{
PhantomServer.ShutDown(false, true);
}
catch
{
}
}
private static async Task CheckServerAvailabilityAsync(HttpContext context, HttpCookie[] cookies)
{
if (ServerAvailabilityChecked || cookies == null)
{
return;
}
using (await _serverAvailabilityCheckLock.LockAsync())
{
if (ServerAvailabilityChecked)
{
return;
}
if (!SystemFullyOnline)
{
return;
}
try
{
string testUrl = UrlUtils.Combine(new UrlBuilder(context.Request.Url.ToString()).ServerUrl, UrlUtils.PublicRootPath);
SetupRecycleTimer();
string outputFileName = Path.Combine(TempDirectoryFacade.TempDirectoryPath, "phantomtest.png");
var result = await PhantomServer.RenderUrlAsync(cookies, testUrl, outputFileName, "test");
if (result.Status == RenderingResultStatus.PhantomServerTimeout ||
result.Status == RenderingResultStatus.PhantomServerIncorrectResponse ||
result.Status == RenderingResultStatus.PhantomServerNoOutput)
{
Enabled = false;
Log.LogWarning(LogTitle, "The function preview feature will be turned off as PhantomJs server failed to complete a test HTTP request");
}
}
catch (Exception ex)
{
Log.LogWarning(LogTitle, "PhantomJs server unable to complete HTTP requests, preventing C1 Function preview images from being generated. " + Environment.NewLine + ex);
Enabled = false;
PhantomServer.ShutDown(false);
}
finally
{
ServerAvailabilityChecked = true;
}
}
}
private static async Task <RenderingResult> MakePreviewRequestAsync(HttpContext context, string url, string outputFileName, string mode)
{
var cookies = GetAuthenticationCookies(context);
await CheckServerAvailabilityAsync(context, cookies);
if (!Enabled)
{
return(null);
}
_lastUsageDate = DateTime.Now;
return(await PhantomServer.RenderUrlAsync(cookies, url, outputFileName, mode));
}
public static void ShutDown(bool alreadyLocked, bool silent = false)
{
PhantomServer ps;
using (alreadyLocked ? null : _instanceAsyncLock.Lock())
{
if (_instance == null)
{
return;
}
ps = _instance;
_instance = null;
}
ps.DisposeInternal(silent);
GC.SuppressFinalize(ps);
}
public static void ShutDown(bool alreadyLocked, bool silent = false)
{
PhantomServer ps;
using (alreadyLocked ? null : _instanceAsyncLock.Lock())
{
if (_instance == null)
{
return;
}
ps = _instance;
_instance = null;
}
ps.DisposeInternal(silent);
GC.SuppressFinalize(ps);
}
private static async Task CheckServerAvailabilityAsync(HttpContext context, HttpCookie authenticationCookie)
{
if (ServerAvailabilityChecked || authenticationCookie == null)
{
return;
}
using (await _serverAvailabilityCheckLock.LockAsync())
{
if (ServerAvailabilityChecked)
{
return;
}
if (!SystemFullyOnline)
{
return;
}
try
{
string testUrl = UrlUtils.Combine(new UrlBuilder(context.Request.Url.ToString()).ServerUrl, UrlUtils.PublicRootPath);
SetupRecycleTimer();
string outputFileName = Path.Combine(TempDirectoryFacade.TempDirectoryPath, "phantomtest.png");
await PhantomServer.RenderUrlAsync(authenticationCookie, testUrl, outputFileName, "test");
}
catch (Exception ex)
{
Log.LogWarning(LogTitle, "PhantomJs server unable to complete HTTP requests, preventing C1 Function preview images from being generated. " + Environment.NewLine + ex);
Enabled = false;
PhantomServer.ShutDown(false);
}
finally
{
ServerAvailabilityChecked = true;
}
}
}
