/**************************************************************************/
private async Task <MacroscopeConstants.FetchStatus> Fetch(string Url, string RedirectedFromUrl = null)
{
MacroscopeDocument msDoc = null;
MacroscopeConstants.FetchStatus FetchStatus = MacroscopeConstants.FetchStatus.VOID;
bool BlockedByRobotsRule;
if (MacroscopePreferencesManager.GetPageLimit() > -1)
{
int PagesFound = this.JobMaster.GetPagesFound();
int PageLimit = MacroscopePreferencesManager.GetPageLimit();
if (PagesFound >= PageLimit)
{
this.DebugMsg(string.Format("PAGE LIMIT REACHED: {0} :: {1}", PageLimit, PagesFound));
return(FetchStatus);
}
}
if (this.DocCollection.ContainsDocument(Url: Url))
{
msDoc = this.DocCollection.GetDocumentByUrl(Url: Url);
if (msDoc.GetAuthenticationRealm() != null)
{
if (msDoc.GetAuthenticationType() == MacroscopeConstants.AuthenticationType.BASIC)
{
MacroscopeCredential Credential;
Credential = this.JobMaster.GetCredentialsHttp().GetCredential(
msDoc.GetHostAndPort(),
msDoc.GetAuthenticationRealm()
);
if (Credential != null)
{
msDoc = this.DocCollection.CreateDocument(
Credential: Credential,
Url: Url
);
}
}
}
}
else
{
msDoc = this.DocCollection.CreateDocument(Url: Url);
}
if (!string.IsNullOrEmpty(RedirectedFromUrl))
{
msDoc.SetUrlRedirectFrom(Url: RedirectedFromUrl);
}
msDoc.SetFetchStatus(MacroscopeConstants.FetchStatus.OK);
if (!MacroscopeDnsTools.CheckValidHostname(Url: Url))
{
this.DebugMsg(string.Format("Fetch :: CheckValidHostname: {0}", "NOT OK"));
msDoc.SetStatusCode(HttpStatusCode.BadGateway);
FetchStatus = MacroscopeConstants.FetchStatus.NETWORK_ERROR;
msDoc.SetFetchStatus(FetchStatus);
}
if (await this.JobMaster.GetRobots().CheckRobotRule(Url: Url))
{
msDoc.SetAllowedByRobots(true);
}
else
{
msDoc.SetAllowedByRobots(false);
}
BlockedByRobotsRule = await this.JobMaster.GetRobots().ApplyRobotRule(Url: Url);
if (!BlockedByRobotsRule)
{
this.DebugMsg(string.Format("Disallowed by robots.txt: {0}", Url));
this.JobMaster.AddToBlockedByRobots(Url);
FetchStatus = MacroscopeConstants.FetchStatus.ROBOTS_DISALLOWED;
msDoc.SetFetchStatus(FetchStatus);
JobHistory.VisitedHistoryItem(Url: msDoc.GetUrl());
}
else
{
this.JobMaster.RemoveFromBlockedByRobots(Url);
}
if (this.AllowedHosts.IsExternalUrl(Url: Url))
{
this.DebugMsg(string.Format("IsExternalUrl: {0}", Url));
msDoc.SetIsExternal(State: true);
}
if (this.DocCollection.ContainsDocument(Url: Url))
{
if (!this.DocCollection.GetDocumentByUrl(Url: Url).GetIsDirty())
{
FetchStatus = MacroscopeConstants.FetchStatus.ALREADY_SEEN;
return(FetchStatus);
}
}
if (MacroscopePreferencesManager.GetDepth() >= 0)
{
int Depth = MacroscopeHttpUrlUtils.FindUrlDepth(Url: Url);
if (Depth > MacroscopePreferencesManager.GetDepth())
{
this.DebugMsg(string.Format("URL Too Deep: {0}", Depth));
FetchStatus = MacroscopeConstants.FetchStatus.SKIPPED;
return(FetchStatus);
}
}
/** ------------------------------------------------------------------ **/
if (!await msDoc.Execute())
{
this.DebugMsg(string.Format("EXECUTE FAILED: {0}", Url));
FetchStatus = MacroscopeConstants.FetchStatus.ERROR;
}
/** ------------------------------------------------------------------ **/
/** ------------------------------------------------------------------ **/
{
if (msDoc.GetStatusCode() == HttpStatusCode.Unauthorized)
{
if (msDoc.GetAuthenticationType() == MacroscopeConstants.AuthenticationType.BASIC)
{
MacroscopeCredentialsHttp CredentialsHttp = this.JobMaster.GetCredentialsHttp();
CredentialsHttp.EnqueueCredentialRequest(
Domain: msDoc.GetHostAndPort(),
Realm: msDoc.GetAuthenticationRealm(),
Url: msDoc.GetUrl()
);
this.JobMaster.AddUrlQueueItem(Url: msDoc.GetUrl());
}
}
if (msDoc.GetIsRedirect())
{
this.DebugMsg(string.Format("REDIRECTION DETECTED GetUrl: {0}", msDoc.GetUrl()));
this.DebugMsg(string.Format("REDIRECTION DETECTED From: {0}", msDoc.GetUrlRedirectFrom()));
if (MacroscopePreferencesManager.GetCheckRedirects())
{
string Hostname = msDoc.GetHostAndPort();
string HostnameFrom = MacroscopeAllowedHosts.ParseHostnameFromUrl(msDoc.GetUrlRedirectFrom());
string UrlRedirectTo = msDoc.GetUrlRedirectTo();
string HostnameTo = MacroscopeAllowedHosts.ParseHostnameFromUrl(UrlRedirectTo);
this.DebugMsg(string.Format("REDIRECTION DETECTED UrlRedirectTo: {0}", UrlRedirectTo));
this.DebugMsg(string.Format("REDIRECTION DETECTED HostnameTo: {0}", HostnameTo));
if (MacroscopePreferencesManager.GetFollowRedirects())
{
if (MacroscopePreferencesManager.GetCheckExternalLinks())
{
this.AllowedHosts.AddFromUrl(Url: UrlRedirectTo);
}
else
{
if (this.AllowedHosts.IsInternalUrl(Url: UrlRedirectTo))
{
this.AllowedHosts.AddFromUrl(Url: UrlRedirectTo);
}
}
}
}
this.JobMaster.AddUrlQueueItem(Url: msDoc.GetUrlRedirectTo());
}
else
{
this.ProcessHrefLangLanguages(msDoc); // Process Languages from HrefLang
this.JobMaster.ProcessOutlinks(msDoc: msDoc); // Process Outlinks from document
}
FetchStatus = MacroscopeConstants.FetchStatus.SUCCESS;
}
/** ------------------------------------------------------------------ **/
if (DocCollection.ContainsDocument(msDoc: msDoc))
{
JobHistory.VisitedHistoryItem(Url: Url);
}
else
{
this.DebugMsg(string.Format("OOPS: {0}", Url));
}
/** ------------------------------------------------------------------ **/
return(FetchStatus);
}
/**************************************************************************/
public async void Execute()
{
int MaxFetches = MacroscopePreferencesManager.GetMaxFetchesPerWorker();
while (MaxFetches > 0)
{
if (this.JobMaster.GetThreadsStop())
{
this.DebugMsg(string.Format("JobMaster.GetThreadsStop: {0}", this.JobMaster.GetThreadsStop()));
break;
}
else
{
MacroscopeJobItem JobItem = this.JobMaster.GetUrlQueueItem();
string Url = null;
string RedirectedFromUrl = null;
if (JobItem != null)
{
Url = JobItem.GetItemUrl();
RedirectedFromUrl = JobItem.GetItemRedirectedFromUrl();
}
if (!string.IsNullOrEmpty(Url))
{
if (!this.CheckIncludeExcludeUrl(Url))
{
Url = null;
}
}
if (!string.IsNullOrEmpty(Url))
{
if (
!MacroscopePreferencesManager.GetCrawlParentDirectories() &&
!MacroscopePreferencesManager.GetCrawlChildDirectories() &&
Url != this.JobMaster.GetStartUrl())
{
Url = null;
}
else if (
!MacroscopePreferencesManager.GetCrawlParentDirectories() ||
!MacroscopePreferencesManager.GetCrawlChildDirectories())
{
this.DebugMsg(string.Format("Running Parent/Child Check: {0}", Url));
if (
MacroscopePreferencesManager.GetCrawlParentDirectories() &&
(!string.IsNullOrEmpty(Url)))
{
if (!MacroscopeHttpUrlUtils.IsWithinParentDirectory(StartUrl: this.JobMaster.GetParentStartingDirectory(), Url: Url))
{
Url = null;
}
}
if (
MacroscopePreferencesManager.GetCrawlChildDirectories() &&
(!string.IsNullOrEmpty(Url)))
{
if (!MacroscopeHttpUrlUtils.IsWithinChildDirectory(StartUrl: this.JobMaster.GetChildStartingDirectory(), Url: Url))
{
Url = null;
}
}
}
else
{
this.DebugMsg(string.Format("Skipping Parent/Child Check: {0}", Url));
}
}
if (!string.IsNullOrEmpty(Url))
{
if (MacroscopePreferencesManager.GetDepth() >= 0)
{
if (MacroscopeHttpUrlUtils.FindUrlDepth(Url: Url) > MacroscopePreferencesManager.GetDepth())
{
this.DebugMsg(string.Format("URL Too Deep: {0}", Url));
Url = null;
}
}
}
if (!string.IsNullOrEmpty(Url))
{
this.DebugMsg(string.Format("Execute: {0}", Url));
int Tries = MacroscopePreferencesManager.GetMaxRetries();
JobHistory.AddHistoryItem(Url: Url);
do
{
this.DebugMsg(string.Format("Trying Fetch: {0} :: {1}", Tries, Url));
MacroscopeConstants.FetchStatus FetchStatus = MacroscopeConstants.FetchStatus.VOID;
try
{
if (!string.IsNullOrEmpty(RedirectedFromUrl))
{
FetchStatus = await this.Fetch(Url, RedirectedFromUrl);
}
else
{
FetchStatus = await this.Fetch(Url);
}
}
catch (Exception ex)
{
this.DebugMsg(string.Format("FetchStatus: {0}", ex.Message));
this.DebugMsg(string.Format("Url: {0}", Url));
this.DebugMsg(string.Format("FetchStatus: {0}", FetchStatus));
}
switch (FetchStatus)
{
case MacroscopeConstants.FetchStatus.ERROR:
this.DebugMsg(string.Format("Fetch Failed: {0} :: {1}", Tries, Url));
Thread.Sleep(25);
break;
case MacroscopeConstants.FetchStatus.NETWORK_ERROR:
this.DebugMsg(string.Format("Fetch Failed: {0} :: {1}", Tries, Url));
Thread.Sleep(25);
break;
default:
this.JobMaster.NotifyWorkersFetched(Url: Url);
Tries = 0;
break;
}
Tries--;
} while(Tries > 0);
if (this.CrawlDelay > 0)
{
this.DebugMsg(string.Format("CRAWL DELAY: Sleeping for {0} seconds...", this.CrawlDelay));
Thread.Sleep(CrawlDelay * 1000);
}
}
}
MaxFetches--;
//Thread.Yield();
}
this.JobMaster.NotifyWorkersDone();
}
/**************************************************************************/
private MacroscopeConstants.FetchStatus Fetch(string Url)
{
MacroscopeDocument msDoc = this.DocCollection.GetDocument(Url);
MacroscopeConstants.FetchStatus FetchStatus = MacroscopeConstants.FetchStatus.VOID;
if (msDoc != null)
{
if (msDoc.GetAuthenticationRealm() != null)
{
if (msDoc.GetAuthenticationType() == MacroscopeConstants.AuthenticationType.BASIC)
{
MacroscopeCredential Credential;
Credential = this.JobMaster.GetCredentialsHttp().GetCredential(
msDoc.GetHostAndPort(),
msDoc.GetAuthenticationRealm()
);
if (Credential != null)
{
msDoc = this.DocCollection.CreateDocument(
Credential: Credential,
Url: Url
);
}
}
}
}
else
{
msDoc = this.DocCollection.CreateDocument(Url);
}
msDoc.SetFetchStatus(MacroscopeConstants.FetchStatus.OK);
if (!MacroscopeDnsTools.CheckValidHostname(Url: Url))
{
DebugMsg(string.Format("Fetch :: CheckValidHostname: {0}", "NOT OK"));
msDoc.SetStatusCode(HttpStatusCode.BadGateway);
FetchStatus = MacroscopeConstants.FetchStatus.NETWORK_ERROR;
msDoc.SetFetchStatus(MacroscopeConstants.FetchStatus.NETWORK_ERROR);
}
if (!this.JobMaster.GetRobots().ApplyRobotRule(Url))
{
DebugMsg(string.Format("Disallowed by robots.txt: {0}", Url));
this.JobMaster.AddToBlockedByRobots(Url);
FetchStatus = MacroscopeConstants.FetchStatus.ROBOTS_DISALLOWED;
msDoc.SetFetchStatus(MacroscopeConstants.FetchStatus.ROBOTS_DISALLOWED);
this.JobMaster.GetJobHistory().VisitedHistoryItem(msDoc.GetUrl());
}
else
{
this.JobMaster.RemoveFromBlockedByRobots(Url);
}
this.JobMaster.GetJobHistory().AddHistoryItem(Url);
if (this.AllowedHosts.IsExternalUrl(Url: Url))
{
DebugMsg(string.Format("IsExternalUrl: {0}", Url));
msDoc.SetIsExternal(State: true);
}
if (this.DocCollection.ContainsDocument(Url))
{
if (!this.DocCollection.GetDocument(Url).GetIsDirty())
{
FetchStatus = MacroscopeConstants.FetchStatus.ALREADY_SEEN;
return(FetchStatus);
}
}
if (this.JobMaster.GetDepth() > 0)
{
int Depth = MacroscopeUrlUtils.FindUrlDepth(Url);
if (Depth > this.JobMaster.GetDepth())
{
DebugMsg(string.Format("TOO DEEP: {0}", Depth));
FetchStatus = MacroscopeConstants.FetchStatus.SKIPPED;
return(FetchStatus);
}
}
if (msDoc.Execute())
{
this.DocCollection.AddDocument(Url, msDoc);
if (msDoc.GetStatusCode() == HttpStatusCode.Unauthorized)
{
if (msDoc.GetAuthenticationType() == MacroscopeConstants.AuthenticationType.BASIC)
{
MacroscopeCredentialsHttp CredentialsHttp = this.JobMaster.GetCredentialsHttp();
CredentialsHttp.EnqueueCredentialRequest(
Domain: msDoc.GetHostAndPort(),
Realm: msDoc.GetAuthenticationRealm(),
Url: msDoc.GetUrl()
);
this.JobMaster.AddUrlQueueItem(Url: msDoc.GetUrl());
}
}
this.JobMaster.GetJobHistory().VisitedHistoryItem(msDoc.GetUrl());
this.JobMaster.IncPageLimitCount();
if (msDoc.GetIsRedirect())
{
DebugMsg(string.Format("REDIRECTION DETECTED GetUrl: {0}", msDoc.GetUrl()));
DebugMsg(string.Format("REDIRECTION DETECTED From: {0}", msDoc.GetUrlRedirectFrom()));
if (MacroscopePreferencesManager.GetFollowRedirects())
{
string Hostname = msDoc.GetHostAndPort();
string HostnameFrom = MacroscopeAllowedHosts.ParseHostnameFromUrl(msDoc.GetUrlRedirectFrom());
string UrlRedirectTo = msDoc.GetUrlRedirectTo();
string HostnameTo = MacroscopeAllowedHosts.ParseHostnameFromUrl(UrlRedirectTo);
DebugMsg(string.Format("REDIRECTION DETECTED UrlRedirectTo: {0}", UrlRedirectTo));
DebugMsg(string.Format("REDIRECTION DETECTED HostnameTo: {0}", HostnameTo));
}
this.JobMaster.AddUrlQueueItem(Url: msDoc.GetUrlRedirectTo());
}
else
{
this.ProcessHrefLangLanguages(msDoc); // Process Languages from HrefLang
this.ProcessOutlinks(msDoc); // Process Outlinks from document
}
FetchStatus = MacroscopeConstants.FetchStatus.SUCCESS;
}
else
{
DebugMsg(string.Format("EXECUTE FAILED: {0}", Url));
FetchStatus = MacroscopeConstants.FetchStatus.ERROR;
}
return(FetchStatus);
}
