public WebScreenshotService(WebScreenshotServiceSettings settings)
{
if (settings == null)
{
throw new ArgumentNullException(nameof(settings), $"{nameof(settings)} cannot be null.");
}
this.Settings = settings;
this.Settings.EnsureUri();
this.Settings.EnsureBrowserBounds();
this._tscBrowserInitialized = new TaskCompletionSource <bool>();
this._tscLoadingStateChanged = new TaskCompletionSource <bool>();
}
protected virtual void Dispose(bool disposing)
{
if (!this._disposed)
{
if (disposing)
{
this.Settings = null;
this._tscBrowserInitialized = null;
this._tscLoadingStateChanged = null;
}
}
this._disposed = true;
}
private void TakeScreenshotAndGenerateThumbnailInternal(string url, string localPath)
{
var thumbnailFile = new FileInfo(localPath);
var webScreenshotServiceSettings = new WebScreenshotServiceSettings
{
Uri = new Uri(url),
BrowserWidth = this._settings.BrowserWidth,
BrowserHeight = this._settings.BrowserHeight,
ThumbnailWidth = this._settings.ThumbnailWidth,
ThumbnailHeight = this._settings.ThumbnailHeight
};
using (var webScreenshotService = new WebScreenshotService(webScreenshotServiceSettings))
using (var thumbnailTask = webScreenshotService.TakeScreenshotAndGenerateThumbnailAsync())
{
var completed = thumbnailTask.Wait((int)this._settings.MillisecondsTimeoutWaitTask.TotalMilliseconds);
if (!completed)
{
throw new Exception($"The thumbnail could not be generated. The process has waited for {this._settings.MillisecondsTimeoutWaitTask.TotalSeconds} seconds. Url: {url}.");
}
var exception = thumbnailTask.Exception;
if (exception != null)
{
throw new Exception($"An internal error occurred while running the task. Url: {url}.", exception);
}
if (!thumbnailFile.Directory.Exists)
{
thumbnailFile.Directory.Create();
thumbnailFile.Directory.Refresh();
}
if (thumbnailFile.Exists)
{
thumbnailFile.Delete();
thumbnailFile.Refresh();
}
thumbnailTask.Result.Save(thumbnailFile.FullName, ImageFormat.Jpeg);
}
thumbnailFile.Refresh();
using (var image = new MagickImage(thumbnailFile.FullName))
{
var isWhite = this.CheckImageColor(image, MagickColors.White);
if (isWhite)
{
throw new Exception($"Something went wrong, the thumbnail is totally white. Url: {url}.");
}
var isBlack = this.CheckImageColor(image, MagickColors.Black);
if (isBlack)
{
throw new Exception($"Something went wrong, the thumbnail is totally black. Url: {url}.");
}
}
}
