/// <summary>
/// Beging getting document by the url.
/// </summary>
/// <param name="url"></param>
/// <returns></returns>
public bool Navigate(string url)
{
try
{
IE_result = false;
lock (completed_urls)
{
completed_urls.Clear();
}
init_loading(url);
init_loading_progress(url);
IeRoutines.Invoke(browser, () => { browser.Navigate(url); });
IE_result = true;
return(IE_result);
}
catch (ThreadAbortException)
{
}
catch (Exception error)
{
web_routine_status = WebRoutineStatus.EXCEPTION;
Log.Error(error.Message + "\nURL: " + url + "\nIE using");
}
IE_result = false;
return(IE_result);
}
//*********************************************************************************************
//*********************************************************************************************
//*********************************************************************************************
public IEnumerable <HtmlElement> GetHtmlElementsByAttr(string attribute, string value = null, string tag = null, HtmlElement parent_he = null)
{
if (parent_he == null)
{
parent_he = HtmlDoc.Body;
}
return(IeRoutines.GetHtmlElementsByAttr(parent_he, attribute, value, tag));
}
public void Dispose()
{
IeRoutines.Invoke(browser, () =>
{
try
{
browser.Stop();
browser.Dispose();
}
catch { }
});
}
/// <summary>
/// Get complete document by the url.
/// </summary>
/// <param name="url"></param>
/// <param name="timeout_in_mss"></param>
/// <param name="return_if_exists"></param>
/// <returns></returns>
public bool GetDoc(string url, int timeout_in_mss = -1, Func <object> return_if_exists = null)
{
try
{
IE_result = false;
if (UseCache && Cache.GetCachedFile(url, null, out binary_result, out ResponseUrl, out CachedFile))
{
web_routine_status = WebRoutineStatus.CACHED;
Log.Write("From cache: " + url);
IE_result = true;
return(true);
}
if (Navigate(url))
{
if (return_if_exists == null)
{
IE_result = WaitForCompletion(timeout_in_mss);
}
else
{
if (timeout_in_mss < 0)
{
timeout_in_mss = Settings.Browser.PageCompletedTimeoutInSeconds * 1000;
}
IE_result = (IeRoutines.WaitForCondition(browser, return_if_exists, timeout_in_mss) != null);
}
browser.Invoke(() => { HtmlDoc = browser.Document; });
}
return(IE_result);
}
catch (ThreadAbortException)
{
}
catch (Exception error)
{
web_routine_status = WebRoutineStatus.EXCEPTION;
Log.Error(error.Message + "\nURL: " + url + "\nIE using");
}
IE_result = false;
return(IE_result);
}
public IeRoutine(WebBrowser browser)
{
IeRoutines.Invoke(browser, () =>
{
if (_CloseWebBrowserDialogsAutomatically)
{
browser.ScriptErrorsSuppressed = true;
WindowInterceptor.AddOwnerWindow(browser.Handle);
}
browser.Navigating += new System.Windows.Forms.WebBrowserNavigatingEventHandler(Browser_Navigating);
browser.DocumentCompleted += new System.Windows.Forms.WebBrowserDocumentCompletedEventHandler(Browser_DocumentCompleted);
browser.NewWindow += new System.ComponentModel.CancelEventHandler(browser_NewWindow);
browser.ProgressChanged += new WebBrowserProgressChangedEventHandler(browser_ProgressChanged);
this.browser = browser;
//needed to make google (and probably other sites) work correctly
//if (!InternetExplorerBrowserEmulation.IsBrowserEmulationSet())
// InternetExplorerBrowserEmulation.SetBrowserEmulationVersion();
});
}
internal void CloseIE()
{
try
{
IeRoutines.Invoke(browser, () =>
{
if (browser != null)
{
GetDoc("about:blank");
browser.Dispose();
browser = null;
}
});
}
catch (ThreadAbortException)
{
}
catch (Exception error)
{
Log.Error(error);
}
}
/// <summary>
/// Universal method to load page
/// </summary>
bool _do(HttpRequest http_request, bool send_cookies)
{
Stream res_stream = null;
try
{
init_loading(http_request.Url);
if (UseCache)
{
if (Cache.GetCachedFile(http_request.Url, http_request.PostString, out binary_result, out ResponseUrl, out CachedFile))
{
web_routine_status = WebRoutineStatus.CACHED;
Log.Write("From cache: " + http_request.Url);
return(true);
}
}
init_loading_progress(http_request.Url);
if (http_request.Method == HttpRequest.RequestMethod.POST)
{
System.Net.ServicePointManager.Expect100Continue = false;
}
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(http_request.Url);
req.Credentials = credential_cache;
req.AutomaticDecompression = DecompressionMethods.Deflate | DecompressionMethods.GZip;
if (send_cookies)
{
if (UseIeCookies)
{
Uri uri = new Uri(http_request.Url);
string cookie = IeRoutines.RetrieveIeCookies(uri);
if (cookie.Length > 0)
{
cookie = Regex.Replace(cookie, ";", ",");
lock (CookieContainer)
CookieContainer.SetCookies(uri, cookie);
}
}
req.CookieContainer = CookieContainer;
}
if (Proxy != null)
{
req.Proxy = Proxy.WebProxy;
}
req.Timeout = Settings.Web.HttpRequestTimeoutInSeconds * 1000;
req.ReadWriteTimeout = Settings.Web.HttpRequestTimeoutInSeconds * 1000;
if (HttpRequest.MaxAutoRedirectionCount == 0)
{
req.AllowAutoRedirect = false;
}
else if (HttpRequest.MaxAutoRedirectionCount > 0)
{
req.AllowAutoRedirect = true;
req.MaximumAutomaticRedirections = HttpRequest.MaxAutoRedirectionCount;
}
foreach (KeyValuePair <string, string> header in http_request.Headers)
{
if (header.Value == null)
{
continue;
}
switch (header.Key)
{
case "User-Agent":
req.UserAgent = header.Value;
break;
case "Accept":
req.Accept = header.Value;
break;
case "Referer":
req.Referer = header.Value;
break;
case "Connection":
if (Regex.IsMatch(header.Value, "keep-alive", RegexOptions.IgnoreCase))
{
req.KeepAlive = true;
}
break;
case "Content-Type":
req.ContentType = header.Value;
break;
case "Expect":
req.Expect = header.Value;
break;
default:
req.Headers[header.Key] = header.Value;
break;
}
}
if (http_request.Method == HttpRequest.RequestMethod.POST)
{
req.Method = "POST";
if (http_request.PostData != null)
{
req.ContentLength = http_request.PostData.Length;
Stream req_stream = req.GetRequestStream();
req_stream.Write(http_request.PostData, 0, http_request.PostData.Length);
req_stream.Close();
}
}
HWResponse = (HttpWebResponse)req.GetResponse();
ResponseUrl = HWResponse.ResponseUri.ToString();
if (HWResponse.StatusCode == HttpStatusCode.Redirect)
{
web_routine_status = WebRoutineStatus.REDIRECTION;
throw new Exception("Redirected.\nURL:" + http_request.Url);
}
if (send_cookies)
{
lock (CookieContainer)
CookieContainer.Add(HWResponse.Cookies);
}
string accept;
if (http_request.Headers.TryGetValue("Accept", out accept) &&
accept == Settings.Web.TextModeHttpRequestAcceptHeader &&
!Regex.IsMatch(HWResponse.ContentType, Settings.Web.TextModeDownloadableContentTypePattern, RegexOptions.Compiled | RegexOptions.IgnoreCase)
)
{
web_routine_status = WebRoutineStatus.UNACCEPTABLE_CONTENT_TYPE;
throw new Exception("Unacceptable Content-Type:" + HWResponse.ContentType + "\nURL:" + http_request.Url);
}
MemoryStream result_ms = new MemoryStream();
int progress_max = (int)HWResponse.ContentLength;
res_stream = HWResponse.GetResponseStream();
byte[] buff = new byte[8192];
int total_byte_count = 0;
while (true)
{
int byte_count = res_stream.Read(buff, 0, buff.Length);
if (byte_count < 1)
{
break;
}
result_ms.Write(buff, 0, byte_count);
total_byte_count += byte_count;
show_progress(progress_max, total_byte_count);
if (Settings.Web.MaxDownloadedFileLength > 0 &&
total_byte_count > Settings.Web.MaxDownloadedFileLength
)
{
web_routine_status = WebRoutineStatus.FILE_TRUNCATED;
Log.Write("TRUNCATED. URL:" + http_request.Url);
break;
}
}
binary_result = result_ms.ToArray();
//if (res.StatusCode != HttpStatusCode.OK)
//{
// web_routine_status = WebRoutineStatus.DOWNLOAD_ERROR;
// string proxy = "";
// if (Proxy != null && Proxy.Address != null && Proxy.Address.Authority != null)
// proxy = Proxy.Address.Authority;
// Log.Error("Download error: " + res.StatusDescription + "\nURL:" + url + "\nPROXY: " + proxy);
// return false;
//}
if (web_routine_status == WebRoutineStatus.UNDEFINED)
{
web_routine_status = WebRoutineStatus.OK;
}
bool content_is_text = false;
if (Regex.IsMatch(HWResponse.ContentType, "text|json|xml", RegexOptions.Compiled | RegexOptions.IgnoreCase))
{
content_is_text = true;
}
CachedFile = Cache.CacheDownloadedFile(content_is_text, http_request.Url, http_request.PostString, ResponseUrl, BinaryResult, get_next_page_number(), cycle_identifier, web_routine_status);
return(true);
}
catch (ThreadAbortException)
{
//Thread.ResetAbort();
}
catch (System.Net.WebException error)
{
string proxy = "";
if (Proxy != null && Proxy.WebProxy.Address != null && Proxy.WebProxy.Address.Authority != null)
{
proxy = Proxy.WebProxy.Address.Authority;
}
ErrorMessage = error.Message;
if (web_routine_status == WebRoutineStatus.UNDEFINED)
{
web_routine_status = WebRoutineStatus.DOWNLOAD_ERROR;
}
Log.Write("DOWNLOAD ERROR: " + error.Message + "\n" + error.StackTrace + "\nPROXY: " + proxy);
}
catch (Exception error)
{
ErrorMessage = error.Message;
if (web_routine_status == WebRoutineStatus.UNDEFINED)
{
web_routine_status = WebRoutineStatus.DOWNLOAD_ERROR;
}
Log.Error(error);
}
finally
{
if (res_stream != null)
{
res_stream.Close();
}
if (HWResponse != null)
{
HWResponse.Close();
}
}
if (ErrorMessage == null)
{
return(false);
}
return(false);
}
