/// <summary>
/// Event triggered from manager class, updates all of the web page data on the form
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void m_RequestComplete(object sender, RequestCompleteArgs e)
{
resultDisplay.Text = e.pageData;
URLinputBox.Text = e.URL;
titleHolder.Text = e.title;
HTTPHolder.Text = e.request;
}
/// <summary>
/// Loads the provided URL (via triggering an event)
/// </summary>
/// <param name="URL">The URL that has been requested</param>
/// <param name="historyItem"> True (yes the item should be added to history) False (do not add to history) </param>
public async Task <bool> _loadWebsite(string URL, bool historyItem)
{
// Setting the currentURL to the last loaded webpage
currentURL = URL;
HttpResponseMessage httpResponse = await HTTP.Get(URL);
if (httpResponse.StatusCode == HttpStatusCode.OK)
{
browser = new BrowserResponse(httpResponse);
result = await browser.getContent();
if (historyItem)
{
historyManager.addToHistory(URL);
}
RequestCompleteArgs args = new RequestCompleteArgs();
args.pageData = result;
// Used the following resource for the regex
//https://www.experts-exchange.com/questions/23135727/regular-expression-to-match-title-tag-on-html-page.html
args.title = Regex.Match(result, "<title>([^<]*)</title>").Groups[1].Value;
args.request = httpResponse.StatusCode.ToString();
args.URL = currentURL;
OnRequestComplete(args);
return(true);
}
else
{
// Display the relevant HTTPresponse status code error messageS
// Error messages from : https://docs.microsoft.com/en-us/dotnet/api/system.net.httpstatuscode?view=netcore-3.1
switch (httpResponse.StatusCode)
{
case HttpStatusCode.BadRequest:
System.Windows.Forms.MessageBox.Show("The request could not be understood by the server", "400 Bad Request");
break;
case HttpStatusCode.Forbidden:
System.Windows.Forms.MessageBox.Show("The server refuses to fulfill the request", "403 Forbidden");
break;
case HttpStatusCode.NotFound:
System.Windows.Forms.MessageBox.Show("The requested resource does not exist on the server", "404 Not Found");
break;
default:
// Handling all other status codes (apart from 200)
System.Windows.Forms.MessageBox.Show(httpResponse.StatusCode.ToString(), "Unhandeled status code");
break;
}
}
//Throws an exception if invalid response
httpResponse.EnsureSuccessStatusCode();
// The webpage was not loaded
return(false);
}
/// <summary>
/// Used to trigger an event in another class when the a page request is completed
/// </summary>
/// <param name="e">The args passed to the event</param>
protected virtual void OnRequestComplete(RequestCompleteArgs e)
{
EventHandler <RequestCompleteArgs> handler = RequestComplete;
if (handler != null)
{
handler(this, e);
}
}
