public CrawlResult Crawl()
{
IWebCrawler crawler = InitCrawler();
Uri uriToCrawl = new Uri("http://rabota.ua/jobsearch/vacancy_list"); //http://rabota.ua/jobsearch/vacancy_list?pg=1000
crawler.ShouldCrawlPage((pageToCrawl, crawlContext) =>
{
if (pageToCrawl.Uri.AbsoluteUri.Contains(@"rabota.ua/jobsearch/vacancy_list") &&
!pageToCrawl.Uri.AbsoluteUri.Contains(@"period"))
{
return new CrawlDecision {
Allow = true
}
}
;
return(new CrawlDecision {
Allow = false, Reason = "Parse only job pages"
});
});
crawler.PageCrawlStartingAsync += crawler_ProcessPageCrawlStarting;
crawler.PageCrawlCompletedAsync += crawler_ProcessPageCrawlCompleted;
crawler.PageCrawlDisallowedAsync += crawler_PageCrawlDisallowed;
crawler.PageLinksCrawlDisallowedAsync += crawler_PageLinksCrawlDisallowed;
CrawlResult result = crawler.Crawl(uriToCrawl);
return(result);
}
public void Crawl(int maxDepth, Uri link)
{
var depth = 0;
var lastWeight = 0.5;
foreach (var vertex in crawler.Crawl(link))
{
var community = false;
_printer.Print(vertex);
var shouldCreate = _communityDecider.ShouldCreateCommunity(lastWeight, vertex.Weight);
lastWeight = vertex.Weight;
if (shouldCreate)
{
community = true;
}
var newUser = new User {
UserId = vertex.Id, Weight = vertex.Weight, Community = community
};
_userRepository.Add(newUser);
depth++;
if (depth >= maxDepth)
{
break;
}
AddChildren(newUser, vertex.Degrees);
}
}
async Task <CrawlResult> CrawlAndTest(Uri uri)
{
var res = await _crawler.Crawl(uri, Context.CancellationTokenSource).ConfigureAwait(false);
_executionQueueBlock.Complete();
await _notificationBlock.Completion.ConfigureAwait(false);
return(res);
}
public Crawler(string argUrl)
{
TheWebCrawler = GetManuallyConfiguredWebCrawler();
TheWebCrawler.PageCrawlCompleted += PageCrawlCompletedEvent;
TheWebCrawler.PageCrawlDisallowed += PageCrawlDisallowedEvent;
TheWebCrawler.PageCrawlStarting += PageCrawlStartingEvent;
TheWebCrawler.PageLinksCrawlDisallowed += PageLinksCrawlDisallowedEvent;
var crawlResult = TheWebCrawler.Crawl(new Uri(argUrl));
}
public Crawler(string argUrl)
{
TheWebCrawler = GetManuallyConfiguredWebCrawler();
TheWebCrawler.PageCrawlCompleted += PageCrawlCompletedEvent;
TheWebCrawler.PageCrawlDisallowed += PageCrawlDisallowedEvent;
TheWebCrawler.PageCrawlStarting += PageCrawlStartingEvent;
TheWebCrawler.PageLinksCrawlDisallowed += PageLinksCrawlDisallowedEvent;
var crawlResult = TheWebCrawler.Crawl(new Uri(argUrl));
}
public void StartCrawl()
{
DateTime timeStamp = DateTime.Now;
CrawlerDefinition.StartTime = timeStamp;
CrawlerDefinition.InProgress = true;
_repo.UpdateCrawl(CrawlerDefinition);
OnDomainCrawlStarted(CrawlerDefinition);
#region log start
if (_logger.IsDebugEnabled)
{
_logger.DebugFormat("Starting crawl sessionId: {0} seed: {1}", CrawlerDefinition.SessionId, CrawlerDefinition.SeedUrl);
}
#endregion
CrawlResult result = _crawler.Crawl(Seed, _cancelToken);
#region log start
if (_logger.IsDebugEnabled)
{
_logger.DebugFormat("Ended crawl elapsed: {0}", result.Elapsed);
}
#endregion
CrawlerDefinition.InProgress = false;
CrawlerDefinition.EndTime = CrawlerDefinition.StartTime.Add(result.Elapsed);
CrawlerDefinition.ErrorOccurred = result.ErrorOccurred;
_repo.UpdateCrawl(CrawlerDefinition);
OnDomainCrawlEnded(CrawlerDefinition);
if (result.ErrorOccurred)
{
var mssg = string.Format("Crawl of {0} completed with error: {1}", result.RootUri.AbsoluteUri, result.ErrorException.Message);
_logger.Error(mssg);
}
else
{
var mssg = string.Format("Crawl of {0} completed without error.", result.RootUri.AbsoluteUri);
_logger.Debug(mssg);
}
}
public void Run(string[] args)
{
// Reads from the command line arguments.
_input.ReadArguments(args);
var domain = _input.DomainUri;
var filePath = _input.OutputFilePath;
var wait = _input.WaitBeforeEnd;
// Crawls the domain and prints the results.
var node = _crawler.Crawl(domain);
var text = _output.Generate(node);
_output.Save(filePath, text);
_output.Write(text, wait);
}
public void CrawlAndAssert(IWebCrawler crawler)
{
crawler.PageCrawlCompletedAsync += crawler_PageCrawlCompleted;
CrawlResult result = crawler.Crawl(_rootUri);
Assert.IsNull(result.ErrorException);
Assert.IsFalse(result.ErrorOccurred);
Assert.AreSame(_rootUri, result.RootUri);
List<Discrepancy> descrepancies = GetDescrepancies();
PrintDescrepancies(descrepancies);
Assert.AreEqual(0, descrepancies.Count, "There were discrepancies between expected and actual crawl results. See ouput window for details.");
Assert.IsTrue(result.Elapsed.TotalSeconds < _maxSecondsToCrawl, string.Format("Elapsed Time to crawl {0}, over {1} second threshold", result.Elapsed.TotalSeconds, _maxSecondsToCrawl));
}
public DomainCrawlResult Consume(Domain domain, CancellationTokenSource cancellationToken)
{
if (domain == null)
{
throw new ArgumentNullException("domain");
}
if (cancellationToken == null)
{
throw new ArgumentNullException("cancellationToken");
}
IEnumerable <ICrawlProcessor> processors = _processorProvider.GetProcessors().ToList();//have to .ToList() since the deferred execution will cause a new instance of each processor to be created with every page
IWebCrawler crawler = CreateCrawlerInstance();
DomainCrawlResult domainCrawlResult = new DomainCrawlResult();
domainCrawlResult.Domain = domain;
try
{
crawler.CrawlBag.GoDaddyProcessorContext = new ProcessorContext
{
Domain = domain,
PrimaryPersistenceProvider = _processorContext.PrimaryPersistenceProvider,
BackupPersistenceProvider = _processorContext.BackupPersistenceProvider,
CrawlProcessors = processors
};
domainCrawlResult.CrawlResult = crawler.Crawl(domain.Uri, cancellationToken);
ProcessCrawledDomain(domainCrawlResult.CrawlResult.CrawlContext);
}
catch (Exception ex)
{
string errorMessage = string.Format("Exception occurred while crawling [{0}], error: [{1}]", domain.Uri.AbsoluteUri, ex.Message);
domainCrawlResult.CrawlResult = new CrawlResult {
ErrorException = ex
};
_logger.ErrorFormat(errorMessage, ex);
//TODO Statsg fatal error occurred during crawl
StatsGLoggerAppender.LogItem(StatLogType.CrawlDaddy_FatalErrorOccured, _config);
}
LogCrawlResult(domainCrawlResult.CrawlResult);
return(domainCrawlResult);
}
public void CrawlAndAssert(IWebCrawler crawler)
{
crawler.PageCrawlCompletedAsync += crawler_PageCrawlCompleted;
CrawlResult result = crawler.Crawl(_rootUri);
Assert.IsNull(result.ErrorException);
Assert.IsFalse(result.ErrorOccurred);
Assert.AreSame(_rootUri, result.RootUri);
List <Discrepancy> descrepancies = GetDescrepancies();
PrintDescrepancies(descrepancies);
Assert.AreEqual(0, descrepancies.Count, "There were discrepancies between expected and actual crawl results. See ouput window for details.");
Assert.IsTrue(result.Elapsed.TotalSeconds < _maxSecondsToCrawl, string.Format("Elapsed Time to crawl {0}, over {1} second threshold", result.Elapsed.TotalSeconds, _maxSecondsToCrawl));
}
public CrawlerViewModel Crawl(CrawlerViewModel viewModel)
{
if (!Helper.IsValidUrl(viewModel.UrlToCrawl))
{
viewModel.ErrorMsg = String.Format(" Please enter mail adress");
return(viewModel);
}
allLinksOnPage = new List <Uri>();
CrawlConfiguration config = new CrawlerNetConfig().Initalize();
this.crawler = new PoliteWebCrawler(config);
crawler.PageCrawlCompleted += crawler_PageCrawlCompleted;
//
CrawlResult result = crawler.Crawl(new Uri(viewModel.UrlToCrawl));
if (result.ErrorOccurred)
{
viewModel.ErrorMsg = String.Format("Crawler completed with error: {0}", result.ErrorException.Message);
}
var isProd = Convert.ToBoolean(ConfigurationManager.AppSettings["IsProd"].ToString());
if (isProd)
{
viewModel.CrawledLinks.AddRange(allLinksOnPage);
}
else
{
viewModel.CrawledLinks.AddRange(allLinksOnPage.Take(10));
}
viewModel.SuccessMsg = " Successfully Listed !";
return(viewModel);
}
public CrawlResult Crawl()
{
IWebCrawler crawler = InitCrawler();
//http://hh.ua/search/vacancy?no_magic=true&items_on_page=100¤cy_code=UAH&clusters=true&page=0 //-- ALL
// --- UA
Uri uriToCrawl = new Uri("http://hh.ua/search/vacancy?no_magic=true&items_on_page=100&clusters=true¤cy_code=UAH&area=5&page=0");
//var urlPattern=@"^http://hh\.ua/search/vacancy\?no_magic=true&items_on_page=100¤cy_code=UAH&clusters=true&page=[0-9]+$"; // -- ALL
var urlPattern = @"^http://hh\.ua/search/vacancy\?no_magic=true&items_on_page=100&clusters=true¤cy_code=UAH&area=5&page=[0-9]+$"; // -- UA
crawler.ShouldCrawlPage((pageToCrawl, crawlContext) =>
{
if (Regex.IsMatch(pageToCrawl.Uri.ToString(), urlPattern, RegexOptions.IgnoreCase))
{
return new CrawlDecision {
Allow = true
}
}
;
return(new CrawlDecision {
Allow = false, Reason = "Parse only job pages"
});
});
crawler.PageCrawlStartingAsync += crawler_ProcessPageCrawlStarting;
crawler.PageCrawlCompletedAsync += crawler_ProcessPageCrawlCompleted;
crawler.PageCrawlDisallowedAsync += crawler_PageCrawlDisallowed;
crawler.PageLinksCrawlDisallowedAsync += crawler_PageLinksCrawlDisallowed;
CrawlResult result = crawler.Crawl(uriToCrawl);
return(result);
}
public Task StartAsync(CancellationToken cancellationToken)
{
_logger.LogInformation("服务开始");
_crawler.Crawl();
return(Task.FromResult(0));
}
public DomainCrawlResult Consume(Domain domain, CancellationTokenSource cancellationToken)
{
if (domain == null)
{
throw new ArgumentNullException("domain");
}
if (cancellationToken == null)
{
throw new ArgumentNullException("cancellationToken");
}
LogCrawlBegin(domain);
IEnumerable <ICrawlProcessor> processors = _processorProvider.GetProcessors().ToList();//have to .ToList() since the deferred execution will cause a new instance of each processor to be created with every page
IWebCrawler crawler = CreateCrawlerInstance();
DomainCrawlResult domainCrawlResult = new DomainCrawlResult();
domainCrawlResult.Domain = domain;
try
{
crawler.CrawlBag.GoDaddyProcessorContext = new ProcessorContext
{
Domain = domain,
PrimaryPersistenceProvider = _processorContext.PrimaryPersistenceProvider,
BackupPersistenceProvider = _processorContext.BackupPersistenceProvider,
CrawlProcessors = processors
};
//call parkedpage processor. if parked, no need to crawl anything
ICrawlProcessor parkedProc = processors.FirstOrDefault(p => p.GetType().Name == "ParkedCrawlProcessor");
CrawlContext cc = new CrawlContext {
RootUri = domain.Uri, CrawlBag = crawler.CrawlBag
};
if (!Object.Equals(null, parkedProc))
{
parkedProc.ProcessCrawledDomain(cc);
}
//if not parked or theres no parked processor, continue crawling the site
if (Object.Equals(null, parkedProc) || !cc.CrawlBag.NoCrawl)
{
domainCrawlResult.CrawlResult = crawler.Crawl(domain.Uri, cancellationToken);
ProcessCrawledDomain(domainCrawlResult.CrawlResult.CrawlContext);
}
}
catch (Exception ex)
{
string errorMessage = string.Format("Exception occurred while crawling [{0}], error: [{1}]", domain.Uri.AbsoluteUri, ex.Message);
domainCrawlResult.CrawlResult = new CrawlResult {
ErrorException = ex
};
_logger.ErrorFormat(errorMessage, ex);
}
if (!Object.Equals(null, domainCrawlResult.CrawlResult)) //could be null if we don't crawl it due to being a parked page or no A record
{
LogCrawlResult(domainCrawlResult.CrawlResult);
}
return(domainCrawlResult);
}
