private void ParseLine()
{
string regex = @"\((?<value>[\[\]\+\!]+)\)";
List <string> internalLines = RegexScraper.ScrapeFromString <string>(Line, regex);
foreach (string iLine in internalLines)
{
CFLine challenge = new CFLine(iLine);
InternalLines.Add(challenge);
}
//Patch to fix lines without ( or ).
if (internalLines.Count == 0)
{
string[] parts = Line.Split(':');
if (parts.Length == 2)
{
InternalLines.Add(new CFLine(parts[1]));
}
else
{
parts = Line.Split('=');
if (parts.Length == 2)
{
InternalLines.Add(new CFLine(parts[1]));
}
}
}
}
public string DownloadString(Uri address)
{
try
{
//UserAgent must be the same throughout all requests
BaseWebClient.Headers.Add(HttpRequestHeader.UserAgent, UserAgent);
return(BaseWebClient.DownloadString(address));
}
catch (WebException ex)
{
if (ex.Status != WebExceptionStatus.ProtocolError)
{
throw;
}
HttpWebResponse httpResponse = (HttpWebResponse)ex.Response;
if (httpResponse.StatusCode != HttpStatusCode.ServiceUnavailable)
{
throw;
}
using (StreamReader stream = new StreamReader(ex.Response.GetResponseStream()))
{
string response = stream.ReadToEnd();
List <CFValues> inputs = RegexScraper.ScrapeFromString <CFValues>(response, @"name=""(?<Name>.*?)"" value=""(?<Value>.*?)""");
List <string> script = RegexScraper.ScrapeFromString <string>(response, @"<script.*?>(?<val>.*?)</script>", options: RegexOptions.Singleline);
//Shouldn't be needed, but causes no harm
List <string> action = RegexScraper.ScrapeFromString <string>(response, @"action=""(?<val>.*?)""");
if (inputs.Count == 0 || script.Count == 0 || action.Count == 0)
{
//Site's different or page changed
throw;
}
BaseWebClient.Headers.Add(HttpRequestHeader.Referer, address.ToString());
BaseWebClient.Headers.Add(HttpRequestHeader.UserAgent, UserAgent);
string baseAddress = address.GetLeftPart(UriPartial.Authority);
string solveChallengeAddress = baseAddress + action[0];
CFChallenge challenge = new CFChallenge(script[0], address);
BaseWebClient.QueryString.Add("jschl_answer", challenge.SolveChallenge().ToString());
foreach (CFValues value in inputs)
{
BaseWebClient.QueryString.Add(value.Name, WebUtility.UrlEncode(value.Value));
}
//5 seconds is too fast for some sites
Thread.Sleep(6000);
string siteResponse = BaseWebClient.DownloadString(solveChallengeAddress);
BaseWebClient.QueryString.Clear();
return(siteResponse);
}
}
}
