public CrawlerEngine(CrawlerDataHolder crawlerDataHolder)
{
this.crawlerDataHolder = crawlerDataHolder;
}
private void tsbStartCrawler_Click(object sender, EventArgs e)
{
tslCrawler.ForeColor = Color.Black;
if (!isCrawlerStarted)
{
string target = Helper.FixStartUrl(txtUrl.Text);
txtUrl.Text = target;
if (!Uri.IsWellFormedUriString(target, UriKind.Absolute))
{
MessageBox.Show("Invalid Url Address.", "PeNCrawLer", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
crawlerDataHolder = new Core.CrawlerDataHolder()
{
targetUrl = txtUrl.Text,
trwCrawler = this.trwCrawler,
lvwCrawler = this.lvwCrawler
};
if (!Advanced_Settings.CrawlerSettings.IsCustomizeSettings)
{
crawlerDataHolder.httpClient = new HttpClient();
Advanced_Settings.CrawlerSettings.HtmlTagAndAttribute = new Dictionary <string, string>();
Advanced_Settings.CrawlerSettings.HtmlTagAndAttribute.Add("a", "href");
Advanced_Settings.CrawlerSettings.HtmlTagAndAttribute.Add("link", "href");
}
crawlerEngine = new Core.CrawlerEngine(crawlerDataHolder);
isCrawlerStarted = true;
tslCrawler.Text = "Processing ...";
StartTime = DateTime.Now;
timerCrawler.Start();
new System.Threading.Thread(new System.Threading.ThreadStart(() =>
{
taskCrawler = new Task(() =>
{
if (crawlerEngine.AnalyseTarget(crawlerDataHolder.targetUrl))
{
crawlerEngine.Crawl(crawlerDataHolder.targetUrl);
}
else
{
crawlerDataHolder.FirstCheckStatus = false;
}
});
taskCrawler.Start();
taskCrawler.Wait();
if (crawlerDataHolder.FirstCheckStatus)
{
toolStrip1.Invoke((MethodInvoker) delegate
{
tslCrawler.ForeColor = Color.Green;
});
tslCrawler.Text = "Operation Successfully Completed.";
tslCrawlerRequests.Text = $"Total number of processed requests: {RequestCalculator.crawlerRequests}";
}
else
{
toolStrip1.Invoke((MethodInvoker) delegate
{
tslCrawler.ForeColor = Color.Red;
});
tslCrawler.Text = "The Operation Failed!";
}
timerCrawler.Stop();
}))
{
IsBackground = true
}.Start();
}
else
{
if (crawlerDataHolder.IsPauseRequested)
{
tslCrawler.Text = "Processing ...";
timerCrawler.Start();
crawlerDataHolder.Resume();
}
else
{
DialogResult result = MessageBox.Show("Crawler is currently running\nAre you sure you want to start new one?", "PeNCrawLer 0.1.0 - Crawler", MessageBoxButtons.YesNo, MessageBoxIcon.Information);
if (result == DialogResult.Yes)
{
// cancel the task
isCrawlerStarted = false;
}
else if (result == DialogResult.No)
{
return;
}
}
}
}