/// <summary>
/// Creates a crawler instance with custom settings or implementation. Passing in null for all params is the equivalent of the empty constructor.
/// </summary>
/// <param name="threadManager">Distributes http requests over multiple threads</param>
/// <param name="scheduler">Decides what link should be crawled next</param>
/// <param name="pageRequester">Makes the raw http requests</param>
/// <param name="htmlParser">Parses a crawled page for it's hyperlinks</param>
/// <param name="crawlDecisionMaker">Decides whether or not to crawl a page or that page's links</param>
/// <param name="crawlConfiguration">Configurable crawl values</param>
/// <param name="memoryManager">Checks the memory usage of the host process</param>
public WebCrawler(
CrawlConfiguration crawlConfiguration,
ICrawlDecisionMaker crawlDecisionMaker,
IThreadManager threadManager,
IScheduler scheduler,
IPageRequester pageRequester,
IHtmlParser htmlParser,
IMemoryManager memoryManager)
{
_crawlContext = new CrawlContext
{
CrawlConfiguration = crawlConfiguration ?? new CrawlConfiguration()
};
CrawlBag = _crawlContext.CrawlBag;
_threadManager = threadManager ?? new TaskThreadManager(_crawlContext.CrawlConfiguration.MaxConcurrentThreads > 0 ? _crawlContext.CrawlConfiguration.MaxConcurrentThreads : Environment.ProcessorCount);
_scheduler = scheduler ?? new Scheduler(_crawlContext.CrawlConfiguration.IsUriRecrawlingEnabled, null, null);
_pageRequester = pageRequester ?? new PageRequester(_crawlContext.CrawlConfiguration, new WebContentExtractor());
_crawlDecisionMaker = crawlDecisionMaker ?? new CrawlDecisionMaker();
if (_crawlContext.CrawlConfiguration.MaxMemoryUsageInMb > 0 ||
_crawlContext.CrawlConfiguration.MinAvailableMemoryRequiredInMb > 0)
{
_memoryManager = memoryManager ?? new MemoryManager(new CachedMemoryMonitor(new GcMemoryMonitor(), _crawlContext.CrawlConfiguration.MaxMemoryUsageCacheTimeInSeconds));
}
_htmlParser = htmlParser ?? new AngleSharpHyperlinkParser(_crawlContext.CrawlConfiguration, null);
_crawlContext.Scheduler = _scheduler;
}
/// <summary>
/// Creates a crawler instance with custom settings or implementation. Passing in null for all params is the equivalent of the empty constructor.
/// </summary>
/// <param name="threadManager">Distributes http requests over multiple threads</param>
/// <param name="scheduler">Decides what link should be crawled next</param>
/// <param name="pageRequester">Makes the raw http requests</param>
/// <param name="hyperLinkParser">Parses a crawled page for it's hyperlinks</param>
/// <param name="crawlDecisionMaker">Decides whether or not to crawl a page or that page's links</param>
/// <param name="crawlConfiguration">Configurable crawl values</param>
/// <param name="memoryManager">Checks the memory usage of the host process</param>
public WebCrawler(
CrawlConfiguration crawlConfiguration,
ICrawlDecisionMaker crawlDecisionMaker,
IThreadManager threadManager,
IScheduler scheduler,
IPageRequester pageRequester,
IHyperLinkParser hyperLinkParser,
IMemoryManager memoryManager)
{
_crawlContext = new CrawlContext();
_crawlContext.CrawlConfiguration = crawlConfiguration ?? GetCrawlConfigurationFromConfigFile();
CrawlBag = _crawlContext.CrawlBag;
_threadManager = threadManager ?? new TaskThreadManager(_crawlContext.CrawlConfiguration.MaxConcurrentThreads > 0 ? _crawlContext.CrawlConfiguration.MaxConcurrentThreads : Environment.ProcessorCount);
_scheduler = scheduler ?? new Scheduler(_crawlContext.CrawlConfiguration.IsUriRecrawlingEnabled, null, null);
_pageRequester = pageRequester ?? new PageRequester(_crawlContext.CrawlConfiguration);
_crawlDecisionMaker = crawlDecisionMaker ?? new CrawlDecisionMaker();
if (_crawlContext.CrawlConfiguration.MaxMemoryUsageInMb > 0 ||
_crawlContext.CrawlConfiguration.MinAvailableMemoryRequiredInMb > 0)
{
_memoryManager = memoryManager ?? new MemoryManager(new CachedMemoryMonitor(new GcMemoryMonitor(), _crawlContext.CrawlConfiguration.MaxMemoryUsageCacheTimeInSeconds));
}
_hyperLinkParser = hyperLinkParser ?? new HapHyperLinkParser(_crawlContext.CrawlConfiguration.IsRespectMetaRobotsNoFollowEnabled, _crawlContext.CrawlConfiguration.IsRespectAnchorRelNoFollowEnabled);
_crawlContext.Scheduler = _scheduler;
}
/// <summary>
/// Creates a crawler instance with custom settings or implementation. Passing in null for all params is the equivalent of the empty constructor.
/// </summary>
/// <param name="threadManager">Distributes http requests over multiple threads</param>
/// <param name="scheduler">Decides what link should be crawled next</param>
/// <param name="httpRequester">Makes the raw http requests</param>
/// <param name="hyperLinkParser">Parses a crawled page for it's hyperlinks</param>
/// <param name="crawlDecisionMaker">Decides whether or not to crawl a page or that page's links</param>
/// <param name="crawlConfiguration">Configurable crawl values</param>
public WebCrawler(
CrawlConfiguration crawlConfiguration,
ICrawlDecisionMaker crawlDecisionMaker,
IThreadManager threadManager,
IScheduler scheduler,
IPageRequester httpRequester,
IHyperLinkParser hyperLinkParser,
IMemoryManager memoryManager)
{
_crawlContext = new CrawlContext();
_crawlContext.CrawlConfiguration = crawlConfiguration ?? GetCrawlConfigurationFromConfigFile() ?? new CrawlConfiguration();
CrawlBag = _crawlContext.CrawlBag;
_threadManager = threadManager ?? new ManualThreadManager(_crawlContext.CrawlConfiguration.MaxConcurrentThreads);
_scheduler = scheduler ?? new FifoScheduler(_crawlContext.CrawlConfiguration.IsUriRecrawlingEnabled);
_httpRequester = httpRequester ?? new PageRequester(_crawlContext.CrawlConfiguration);
_crawlDecisionMaker = crawlDecisionMaker ?? new CrawlDecisionMaker();
if (_crawlContext.CrawlConfiguration.MaxMemoryUsageInMb > 0 ||
_crawlContext.CrawlConfiguration.MinAvailableMemoryRequiredInMb > 0)
{
_memoryManager = memoryManager ?? new MemoryManager(new CachedMemoryMonitor(new GcMemoryMonitor(), _crawlContext.CrawlConfiguration.MaxMemoryUsageCacheTimeInSeconds));
}
_hyperLinkParser = hyperLinkParser ?? new HapHyperLinkParser();
_crawlContext.Scheduler = _scheduler;
}
public void ConfigureServices(IServiceCollection services)
{
services.AddSingleton(Configuration);
// services.AddTransient<ContentContext>();
//Custom code
services.AddDbContextPool <ContentContext>(options =>
{
options.UseSqlite(@"Data Source=D:/repos/WebCrawlerPrj/Crawler/DB/content.db;");
}, poolSize: 200);
services
.AddTransient <LaunchOptions>(provider => new LaunchOptions
{
Headless = false
})
.AddSingleton <IBrowserController, BrowserController>();
services.AddTransient <CrawlConfiguration>(provider => new CrawlConfiguration
{
// HttpRequestTimeoutInSeconds = 30,
MaxPagesToCrawl = 0, //Max Crawl,
MaxConcurrentThreads = 20,
MinCrawlDelayPerDomainMilliSeconds = 300 //Wait this many millisecs between requests
})
.AddTransient <IWebContentExtractor, WebContentExtractor>()
.AddTransient <IPageRequester, PageRequester>()
//.AddTransient<IPageRequester, ChromiumPageRequester>()
.AddTransient <IPoliteWebCrawler, PoliteWebCrawler>(provider =>
{
var crawlConfiguration = provider.GetRequiredService <CrawlConfiguration>();
ICrawlDecisionMaker crawlDecisionMaker = null;
// var crawlDecisionMaker = provider.GetRequiredService<ICrawlDecisionMaker>();
IThreadManager threadManager = null;
// var threadManager = provider.GetRequiredService<IThreadManager>();
IScheduler scheduler = null;
// var scheduler = provider.GetRequiredService<IScheduler>();
// IPageRequester pageRequester = null;
var pageRequester = provider.GetRequiredService <IPageRequester>();
IHtmlParser htmlParser = null;
// var htmlParser = provider.GetRequiredService<IHtmlParser>();
IMemoryManager memoryManager = null;
// var memoryManager = provider.GetRequiredService<IMemoryManager>();
IDomainRateLimiter domainRateLimiter = null;
// var domainRateLimiter = provider.GetRequiredService<IDomainRateLimiter>();
IRobotsDotTextFinder robotsDotTextFinder = null;
// var robotsDotTextFinder = provider.GetRequiredService<IRobotsDotTextFinder>();
return(new PoliteWebCrawler(crawlConfiguration, crawlDecisionMaker, threadManager, scheduler,
pageRequester, htmlParser, memoryManager, domainRateLimiter, robotsDotTextFinder));
});
}
public PoliteWebCrawler(
CrawlConfiguration crawlConfiguration,
ICrawlDecisionMaker crawlDecisionMaker,
IScheduler scheduler,
IPageRequester pageRequester,
IHtmlParser htmlParser,
IMemoryManager memoryManager,
IDomainRateLimiter domainRateLimiter,
IRobotsDotTextFinder robotsDotTextFinder)
: base(crawlConfiguration, crawlDecisionMaker, scheduler, pageRequester, htmlParser, memoryManager)
{
_domainRateLimiter = domainRateLimiter ?? new DomainRateLimiter(_crawlContext.CrawlConfiguration.MinCrawlDelayPerDomainMilliSeconds);
_robotsDotTextFinder = robotsDotTextFinder ?? new RobotsDotTextFinder(new PageRequester(_crawlContext.CrawlConfiguration, new WebContentExtractor()));
}
public PoliteWebCrawler(
CrawlConfiguration crawlConfiguration,
ICrawlDecisionMaker crawlDecisionMaker,
IThreadManager threadManager,
IScheduler scheduler,
IPageRequester pageRequester,
IHyperLinkParser hyperLinkParser,
IMemoryManager memoryManager,
IDomainRateLimiter domainRateLimiter,
IRobotsDotTextFinder robotsDotTextFinder)
: base(crawlConfiguration, crawlDecisionMaker, threadManager, scheduler, pageRequester, hyperLinkParser, memoryManager)
{
_domainRateLimiter = domainRateLimiter ?? new DomainRateLimiter(_crawlContext.CrawlConfiguration.MinCrawlDelayPerDomainMilliSeconds);
_robotsDotTextFinder = robotsDotTextFinder ?? new RobotsDotTextFinder(new PageRequester(_crawlContext.CrawlConfiguration));
}
public PoliteWebCrawler(
CrawlConfiguration crawlConfiguration,
ICrawlDecisionMaker crawlDecisionMaker,
IThreadManager threadManager,
IScheduler scheduler,
IPageRequester httpRequester,
IHyperLinkParser hyperLinkParser,
IMemoryManager memoryManager,
IDomainRateLimiter domainRateLimiter,
IRobotsDotTextFinder robotsDotTextFinder)
: base(crawlConfiguration, crawlDecisionMaker, threadManager, scheduler, httpRequester, hyperLinkParser, memoryManager)
{
_domainRateLimiter = domainRateLimiter ?? new DomainRateLimiter(_crawlContext.CrawlConfiguration.MinCrawlDelayPerDomainMilliSeconds);
_robotsDotTextFinder = robotsDotTextFinder ?? new RobotsDotTextFinder(new PageRequester(_crawlContext.CrawlConfiguration));
}
/// <summary>
/// Creates a crawler instance with custom settings or implementation
/// </summary>
/// <param name="threadManager">Distributes http requests over multiple threads</param>
/// <param name="scheduler">Decides what link should be crawled next</param>
/// <param name="pageRequester">Makes the raw http requests</param>
/// <param name="hyperLinkParser">Parses a crawled page for it's hyperlinks</param>
/// <param name="crawlDecisionMaker">Decides whether or not to crawl a page or that page's links</param>
/// <param name="crawlConfiguration">Configurable crawl values</param>
/// <param name="memoryManager">Checks the memory usage of the host process</param>
/// <param name="domainRateLimiter"></param>
/// <param name="robotsDotTextFinder"></param>
/// <param name="sitemapLoader"></param>
public GoogleWebCrawler(
CrawlConfiguration crawlConfiguration = null,
ICrawlDecisionMaker crawlDecisionMaker = null,
IThreadManager threadManager = null,
IScheduler scheduler = null,
IPageRequester pageRequester = null,
IHyperLinkParser hyperLinkParser = null,
IMemoryManager memoryManager = null,
IDomainRateLimiter domainRateLimiter = null,
IRobotsDotTextFinder robotsDotTextFinder = null,
IRobotsSitemapLoader sitemapLoader = null)
: base(SetConfig(crawlConfiguration), crawlDecisionMaker, threadManager, scheduler, pageRequester ?? new BrowserPageRequester(crawlConfiguration), hyperLinkParser, memoryManager, domainRateLimiter, robotsDotTextFinder)
{
SitemapLoader = sitemapLoader ?? new RobotsSitemapLoader();
}
public MultiProxyPoliteWebCrawler(
MultiProxyCrawlConfiguration crawlConfiguration,
ICrawlDecisionMaker crawlDecisionMaker,
IThreadManager threadManager,
IScheduler scheduler,
IPageRequester pageRequester,
IHyperLinkParser hyperLinkParser,
IMemoryManager memoryManager,
IMultiProxyDomainRateLimiter domainRateLimiter,
IRobotsDotTextFinder robotsDotTextFinder)
: base(crawlConfiguration, crawlDecisionMaker, threadManager, scheduler, pageRequester, hyperLinkParser, memoryManager)
{
if ((pageRequester as MultiProxyPageRequester) == null)
_pageRequester = new MultiProxyPageRequester(crawlConfiguration);
_domainRateLimiter = domainRateLimiter ?? new MultiProxyDomainRateLimiter(_crawlContext.CrawlConfiguration.MinCrawlDelayPerDomainMilliSeconds);
_robotsDotTextFinder = robotsDotTextFinder ?? new RobotsDotTextFinder(_pageRequester);
}
public WebCrawler(ILogger <WebCrawler> logger, CrawlConfiguration crawlConfiguration, IThreadManager threadManager, ICrawlDecisionMaker crawlDecisionMaker, ICrawlScheduler crawlScheduler, IPageRequester pageRequester, IDocumentParser hyperLinkParser, IRateLimiter rateLimiter)
{
_logger = logger;
_crawlConfiguration = crawlConfiguration;
_crawlContext = new CrawlContext(logger)
{
CrawlConfiguration = crawlConfiguration
};
_threadManager = threadManager;
_crawlDecisionMaker = crawlDecisionMaker;
_scheduler = crawlScheduler;
_pageRequester = pageRequester;
_hyperLinkParser = hyperLinkParser;
_rateLimiter = rateLimiter;
PageCrawlStartingAsync += WebCrawler_PageCrawlStartingAsync;
}
public CrawlerLight(CrawlConfiguration crawlConfiguration, ICrawlDecisionMaker crawlDecisionMaker,
IThreadManager threadManager, IScheduler scheduler)
{
_crawlContext = new CrawlContext
{
CrawlConfiguration = crawlConfiguration ?? new CrawlConfiguration()
};
_scheduler = scheduler ?? new Scheduler();
int cpuBound = _crawlContext.CrawlConfiguration.MaxConcurrentThreads > 0
? _crawlContext.CrawlConfiguration.MaxConcurrentThreads
: Environment.ProcessorCount;
_threadManager = threadManager ?? new TaskThreadManager(cpuBound, _crawlContext.CancellationTokenSource);
_linkProvider = new AngleSharpLinkParser();
_crawlDecisionMaker = crawlDecisionMaker ?? new CrawlDirector();
_crawlContext.Scheduler = _scheduler;
}
public ImageAltTextChecker(CrawlConfiguration crawlConfiguration, ICrawlDecisionMaker crawlDecisionMaker, IThreadManager threadManager, IScheduler scheduler, IPageRequester pageRequester, IHyperLinkParser hyperLinkParser, IMemoryManager memoryManager, IDomainRateLimiter domainRateLimiter, IRobotsDotTextFinder robotsDotTextFinder)
: base(crawlConfiguration, crawlDecisionMaker, threadManager, scheduler, pageRequester, hyperLinkParser, memoryManager, domainRateLimiter, robotsDotTextFinder)
{
}
public WebChecker(CrawlConfiguration crawlConfiguration, ICrawlDecisionMaker crawlDecisionMaker, IThreadManager threadManager, IScheduler scheduler, IPageRequester pageRequester, IHyperLinkParser hyperLinkParser, IMemoryManager memoryManager, IDomainRateLimiter domainRateLimiter, IRobotsDotTextFinder robotsDotTextFinder)
: base(crawlConfiguration, crawlDecisionMaker, threadManager, scheduler, pageRequester, hyperLinkParser, memoryManager, domainRateLimiter, robotsDotTextFinder)
{
}
/// <summary>
/// Creates a crawler instance with custom settings or implementation. Passing in null for all params is the equivalent of the empty constructor.
/// </summary>
/// <param name="threadManager">Distributes http requests over multiple threads</param>
/// <param name="scheduler">Decides what link should be crawled next</param>
/// <param name="httpRequester">Makes the raw http requests</param>
/// <param name="hyperLinkParser">Parses a crawled page for it's hyperlinks</param>
/// <param name="crawlDecisionMaker">Decides whether or not to crawl a page or that page's links</param>
/// <param name="crawlConfiguration">Configurable crawl values</param>
public WebCrawler(
CrawlConfiguration crawlConfiguration,
ICrawlDecisionMaker crawlDecisionMaker,
IThreadManager threadManager,
IScheduler scheduler,
IPageRequester httpRequester,
IHyperLinkParser hyperLinkParser,
IMemoryManager memoryManager)
{
_crawlContext = new CrawlContext();
_crawlContext.CrawlConfiguration = crawlConfiguration ?? GetCrawlConfigurationFromConfigFile() ?? new CrawlConfiguration();
CrawlBag = _crawlContext.CrawlBag;
_threadManager = threadManager ?? new ManualThreadManager(_crawlContext.CrawlConfiguration.MaxConcurrentThreads);
_scheduler = scheduler ?? new FifoScheduler(_crawlContext.CrawlConfiguration.IsUriRecrawlingEnabled);
_httpRequester = httpRequester ?? new PageRequester(_crawlContext.CrawlConfiguration);
_crawlDecisionMaker = crawlDecisionMaker ?? new CrawlDecisionMaker();
if(_crawlContext.CrawlConfiguration.MaxMemoryUsageInMb > 0
|| _crawlContext.CrawlConfiguration.MinAvailableMemoryRequiredInMb > 0)
_memoryManager = memoryManager ?? new MemoryManager(new CachedMemoryMonitor(new GcMemoryMonitor(), _crawlContext.CrawlConfiguration.MaxMemoryUsageCacheTimeInSeconds));
_hyperLinkParser = hyperLinkParser ?? new HapHyperLinkParser();
_crawlContext.Scheduler = _scheduler;
}
/// <summary>
/// Creates a crawler instance with custom settings or implementation. Passing in null for all params is the equivalent of the empty constructor.
/// </summary>
/// <param name="threadManager">Distributes http requests over multiple threads</param>
/// <param name="scheduler">Decides what link should be crawled next</param>
/// <param name="pageRequester">Makes the raw http requests</param>
/// <param name="hyperLinkParser">Parses a crawled page for it's hyperlinks</param>
/// <param name="crawlDecisionMaker">Decides whether or not to crawl a page or that page's links</param>
/// <param name="crawlConfiguration">Configurable crawl values</param>
/// <param name="memoryManager">Checks the memory usage of the host process</param>
public WebCrawler(
CrawlConfiguration crawlConfiguration,
ICrawlDecisionMaker crawlDecisionMaker,
IThreadManager threadManager,
IScheduler scheduler,
IPageRequester pageRequester,
IHyperLinkParser hyperLinkParser,
IMemoryManager memoryManager)
{
_crawlContext = new CrawlContext();
_crawlContext.CrawlConfiguration = crawlConfiguration ?? GetCrawlConfigurationFromConfigFile();
CrawlBag = _crawlContext.CrawlBag;
_threadManager = threadManager ?? new TaskThreadManager(_crawlContext.CrawlConfiguration.MaxConcurrentThreads > 0 ? _crawlContext.CrawlConfiguration.MaxConcurrentThreads : Environment.ProcessorCount);
_scheduler = scheduler ?? new Scheduler(_crawlContext.CrawlConfiguration.IsUriRecrawlingEnabled, null, null);
_pageRequester = pageRequester ?? new PageRequester(_crawlContext.CrawlConfiguration);
_crawlDecisionMaker = crawlDecisionMaker ?? new CrawlDecisionMaker();
if (_crawlContext.CrawlConfiguration.MaxMemoryUsageInMb > 0
|| _crawlContext.CrawlConfiguration.MinAvailableMemoryRequiredInMb > 0)
_memoryManager = memoryManager ?? new MemoryManager(new CachedMemoryMonitor(new GcMemoryMonitor(), _crawlContext.CrawlConfiguration.MaxMemoryUsageCacheTimeInSeconds));
_hyperLinkParser = hyperLinkParser ?? new HapHyperLinkParser(_crawlContext.CrawlConfiguration.IsRespectMetaRobotsNoFollowEnabled, _crawlContext.CrawlConfiguration.IsRespectAnchorRelNoFollowEnabled, null, _crawlContext.CrawlConfiguration.IsRespectUrlNamedAnchorOrHashbangEnabled);
_crawlContext.Scheduler = _scheduler;
}
public ThinkWebCrawler(ILogger <WebCrawler> logger, CrawlConfiguration crawlConfiguration, IThreadManager threadManager, ICrawlDecisionMaker crawlDecisionMaker, ICrawlScheduler crawlScheduler, IPageRequester pageRequester, IDocumentParser hyperLinkParser, IRateLimiter rateLimiter, IOptions <ThinkCrawlConfiguration> thinkCrawlOpt) : base(logger, crawlConfiguration, threadManager, crawlDecisionMaker, crawlScheduler, pageRequester, hyperLinkParser, rateLimiter)
{
_thinkCrawlConfiguration = thinkCrawlOpt.Value;
Check();
}
