public async Task<bool> Process(ICrawler crawler, PropertyBag propertyBag)
{
if (propertyBag.StatusCode != HttpStatusCode.OK
|| propertyBag.Response == null)
{
return true;
}
string extension = MapContentTypeToExtension(propertyBag.ContentType);
if (extension.IsNullOrEmpty())
{
return true;
}
propertyBag.Title = propertyBag.Step.Uri.PathAndQuery;
using (TempFile temp = new TempFile())
{
temp.FileName += "." + extension;
using (FileStream fs = new FileStream(temp.FileName, FileMode.Create, FileAccess.Write, FileShare.Read, 0x1000))
{
await fs.WriteAsync(propertyBag.Response, 0, propertyBag.Response.Length);
}
ParserContext context = new ParserContext(temp.FileName);
ITextParser parser = ParserFactory.CreateText(context);
propertyBag.Text = parser.Parse();
}
return true;
}
public async Task<bool> Process(ICrawler crawler, PropertyBag propertyBag)
{
FlurlClient client = propertyBag.Step.Uri.ToString()
.ConfigureHttpClient(httpClient => { });
client.Settings.AfterCall += httpCall =>
{
propertyBag[FlurlHttpCallPropertyName].Value = httpCall;
propertyBag.DownloadTime = httpCall.Duration.GetValueOrDefault();
};
HttpResponseMessage getResult = await client.GetAsync();
propertyBag.CharacterSet = getResult.Content.Headers.ContentType.CharSet;
propertyBag.ContentEncoding = string.Join(";", getResult.Content.Headers.ContentEncoding);
propertyBag.ContentType = getResult.Content.Headers.ContentType.MediaType;
propertyBag.Headers = getResult.Content.Headers.ToDictionary(x => x.Key, x => x.Value);
propertyBag.LastModified = getResult.Headers.Date.GetValueOrDefault(DateTimeOffset.UtcNow).DateTime;
propertyBag.Method = "GET";
//propertyBag.ProtocolVersion = getResult.;
//propertyBag.ResponseUri = getResult.Headers.Server;
propertyBag.Server = string.Join(";", getResult.Headers.Server.Select(x => x.Product.ToString()));
propertyBag.StatusCode = getResult.StatusCode;
propertyBag.StatusDescription = getResult.StatusCode.ToString();
propertyBag.Response = await getResult.Content.ReadAsByteArrayAsync();
return true;
}
/// <summary>
/// Analytics Runner
/// </summary>
/// <param name="modelAnalyzer">model Analyzer</param>
/// <returns></returns>
public AnalyticsRunner(ICrawler crawler, ModelAnalyzer modelAnalyzer = null)
{
if (crawler == null)
{
throw new ArgumentNullException("crawler");
}
this.crawler = crawler;
this.modelAnalyzer = modelAnalyzer ?? new ArticlesSiteAnalyzer();
}
public Task<bool> Process(ICrawler crawler, PropertyBag propertyBag)
{
if (_predicate != null)
{
return Task.FromResult(_predicate(crawler, propertyBag));
}
if (_predicate2 != null)
{
return _predicate2(crawler, propertyBag);
}
return Task.FromResult(true);
}
private async Task UpdateMetaInformationAsync(IBlog blog)
{
ICrawler crawler = null;
try
{
crawler = _crawlerFactory.GetCrawler(blog, new Progress <DownloadProgress>(), new PauseToken(), new CancellationToken());
await crawler.UpdateMetaInformationAsync();
}
finally
{
crawler?.Dispose();
}
}
private async Task CheckStatusOfBlogsAsync(SemaphoreSlim semaphoreSlim, IBlog blog)
{
await semaphoreSlim.WaitAsync();
try
{
ICrawler crawler = crawlerFactory.GetCrawler(blog, new CancellationToken(), new PauseToken(),
new Progress <DownloadProgress>());
await crawler.IsBlogOnlineAsync();
}
finally
{
semaphoreSlim.Release();
}
}
public static ICrawler CreateMine(string url)
{
ICrawler result = null;
string name = "{0}"._Format(DefaultConfiguration.GetAppSetting("ApplicationName", "UNKNOWN"));
if (Instances.ContainsKey(name))
{
result = Instances[name];
}
else
{
result = Create(name, url);
}
return(result);
}
public Task <bool> Process(ICrawler crawler, PropertyBag propertyBag)
{
if (propertyBag.StatusCode != HttpStatusCode.OK ||
propertyBag.Response == null ||
propertyBag.Response.Length == 0)
{
return(Task.FromResult(true));
}
if (!IsXmlContent(propertyBag.ContentType))
{
return(Task.FromResult(true));
}
using (MemoryStream ms = new MemoryStream(propertyBag.Response))
{
XDocument mydoc = XDocument.Load(ms);
if (mydoc.Root == null)
{
return(Task.FromResult(true));
}
XName qualifiedName = XName.Get("loc", "http://www.sitemaps.org/schemas/sitemap/0.9");
IEnumerable <string> urlNodes =
from e in mydoc.Descendants(qualifiedName)
where !e.Value.IsNullOrEmpty() && e.Value.StartsWith("http://", StringComparison.OrdinalIgnoreCase)
select e.Value;
foreach (string url in urlNodes)
{
// add new crawler steps
string baseUrl = propertyBag.ResponseUri.GetLeftPart(UriPartial.Path);
string decodedLink = ExtendedHtmlUtility.HtmlEntityDecode(url);
string normalizedLink = NormalizeLink(baseUrl, decodedLink);
if (normalizedLink.IsNullOrEmpty())
{
continue;
}
propertyBag["PropertyBagKeyOriginalUrl"].Value = url;
propertyBag["PropertyBagKeyOriginalReferrerUrl"].Value = propertyBag.ResponseUri;
crawler.Crawl(new Uri(normalizedLink), propertyBag);
}
}
return(Task.FromResult(true));
}
public virtual async Task ProcessAsync(ICrawler crawler, PropertyBag propertyBag)
{
// Get text from previous pipeline step
var text = propertyBag.Text;
if (this.HasTextStripRules)
{
text = this.StripText(text);
}
if (text.IsNullOrEmpty())
{
return;
}
if (this.HasLinkStripRules)
{
text = this.StripLinks(text);
}
// Find links
var matches = s_LinkRegex.Value.Matches(text);
foreach (var match in matches.Cast <Match>().Where(m => m.Success))
{
var link = match.Value;
if (link.IsNullOrEmpty())
{
continue;
}
var baseUrl = propertyBag.ResponseUri.GetLeftPath();
var normalizedLink = link.NormalizeUrl(baseUrl);
if (normalizedLink.IsNullOrEmpty())
{
continue;
}
// Add new step to crawler
await crawler.AddStepAsync(new Uri(normalizedLink), propertyBag.Step.Depth + 1,
propertyBag.Step, new Dictionary <string, object>
{
{ Resources.PropertyBagKeyOriginalUrl, new Uri(link) },
{ Resources.PropertyBagKeyOriginalReferrerUrl, propertyBag.ResponseUri }
}).ConfigureAwait(false);
}
}
public async Task <bool> Process(ICrawler crawler, PropertyBag propertyBag)
{
string robotsHttpUrl = string.IsNullOrEmpty(_searchPath)
? $"{propertyBag.Step.Uri.GetComponents(UriComponents.SchemeAndServer, UriFormat.Unescaped).ToLowerInvariant()}/robots.txt"
: $"{propertyBag.Step.Uri.GetComponents(UriComponents.SchemeAndServer, UriFormat.Unescaped).ToLowerInvariant()}" + _searchPath;
RobotsTxt.Robots robots;
if (!_robotsInfo.TryGetValue(robotsHttpUrl, out robots))
{
_logger.Verbose("Downloading robots.txt file from {@0}", robotsHttpUrl);
string robotsContext = null;
try
{
robotsContext = await _httpClient.GetStringAsync(robotsHttpUrl);
}
catch (WebException)
{
}
catch (ProtocolViolationException)
{
}
catch (HttpRequestException)
{
}
robots = new RobotsTxt.Robots(robotsContext ?? string.Empty);
_robotsInfo.Add(robotsHttpUrl, robots);
}
if (!robots.HasRules)
{
return(true);
}
long crawlDelay = robots.CrawlDelay(propertyBag.UserAgent);
if (crawlDelay > 0)
{
await Task.Delay((int)crawlDelay);
}
bool result = robots.IsPathAllowed(propertyBag.UserAgent, propertyBag.Step.Uri.ToString());
propertyBag[RobotsIsPathAllowedPropertyName].Name = nameof(RobotsPipelineStep);
propertyBag[RobotsIsPathAllowedPropertyName].Value = result;
return(result);
}
public Task<bool> Process(ICrawler crawler, PropertyBag propertyBag)
{
if (propertyBag.StatusCode != HttpStatusCode.OK
|| propertyBag.Response == null
|| propertyBag.Response.Length == 0)
{
return Task.FromResult(true);
}
if (!IsXmlContent(propertyBag.ContentType))
{
return Task.FromResult(true);
}
using (MemoryStream ms = new MemoryStream(propertyBag.Response))
{
XDocument mydoc = XDocument.Load(ms);
if (mydoc.Root == null)
{
return Task.FromResult(true);
}
XName qualifiedName = XName.Get("loc", "http://www.sitemaps.org/schemas/sitemap/0.9");
IEnumerable<string> urlNodes =
from e in mydoc.Descendants(qualifiedName)
where !e.Value.IsNullOrEmpty() && e.Value.StartsWith("http://", StringComparison.OrdinalIgnoreCase)
select e.Value;
foreach (string url in urlNodes)
{
// add new crawler steps
string baseUrl = propertyBag.ResponseUri.GetLeftPart(UriPartial.Path);
string decodedLink = ExtendedHtmlUtility.HtmlEntityDecode(url);
string normalizedLink = NormalizeLink(baseUrl, decodedLink);
if (normalizedLink.IsNullOrEmpty())
{
continue;
}
propertyBag["PropertyBagKeyOriginalUrl"].Value = url;
propertyBag["PropertyBagKeyOriginalReferrerUrl"].Value = propertyBag.ResponseUri;
crawler.Crawl(new Uri(normalizedLink), propertyBag);
}
}
return Task.FromResult(true);
}
private async Task CheckBlogsOnlineStatus()
{
if (shellService.Settings.CheckOnlineStatusAtStartup)
{
await Task.Run(async() =>
{
IEnumerable <IBlog> blogs = managerService.BlogFiles;
foreach (IBlog blog in blogs)
{
ICrawler crawler = CrawlerFactory.GetCrawler(blog, new CancellationToken(), new PauseToken(),
new Progress <DownloadProgress>(), shellService,
crawlerService, managerService);
await crawler.IsBlogOnlineAsync();
}
});
}
}
private async Task CheckStatusAsync()
{
await Task.Run(async() =>
{
var semaphoreSlim = new SemaphoreSlim(25);
IEnumerable <IBlog> blogs = selectionService.SelectedBlogFiles.ToArray();
IEnumerable <Task> tasks = blogs.Select(async blog =>
{
await semaphoreSlim.WaitAsync();
ICrawler crawler = crawlerFactory.GetCrawler(blog, new CancellationToken(), new PauseToken(),
new Progress <DownloadProgress>());
await crawler.IsBlogOnlineAsync();
semaphoreSlim.Release();
});
await Task.WhenAll(tasks);
});
}
/// <summary>
/// </summary>
/// The crawler.
/// <param name="crawler"></param>
/// <param name="propertyBag">
/// The property bag.
/// </param>
public Task<bool> Process(ICrawler crawler, PropertyBag propertyBag)
{
AspectF.Define
.NotNull(propertyBag, "propertyBag");
string text = propertyBag.Text;
if (!text.IsNullOrEmpty())
{
MatchCollection matches = s_emailRegex.Value.Matches(text);
propertyBag["Email"].Value = matches
.Cast<Match>()
.Select(match => match.Value)
.ToArray();
}
return Task.FromResult(true);
}
private async Task AddBlogAsync(string blogUrl)
{
if (string.IsNullOrEmpty(blogUrl))
{
blogUrl = crawlerService.NewBlogUrl;
}
// TODO: Dependency, not SOLID!
IBlog blog;
try
{
blog = BlogFactory.GetBlog(blogUrl, Path.Combine(shellService.Settings.DownloadLocation, "Index"));
}
catch (ArgumentException)
{
return;
}
blog = settingsService.TransferGlobalSettingsToBlog(blog);
ICrawler crawler = CrawlerFactory.GetCrawler(blog.BlogType, new CancellationToken(), new PauseToken(), new Progress <DownloadProgress>(), shellService, crawlerService, blog);
await crawler.IsBlogOnlineAsync();
if (CheckIfTumblrPrivateBlog(blog))
{
blog = PromoteTumblrBlogToPrivateBlog(blog);
crawler = CrawlerFactory.GetCrawler(blog.BlogType, new CancellationToken(), new PauseToken(), new Progress <DownloadProgress>(), shellService, crawlerService, blog);
}
await crawler.UpdateMetaInformationAsync();
lock (lockObject)
{
if (managerService.BlogFiles.Any(blogs => blogs.Name.Equals(blog.Name) && blogs.BlogType.Equals(blog.BlogType)))
{
shellService.ShowError(null, Resources.BlogAlreadyExist, blog.Name);
return;
}
if (blog.Save())
{
QueueOnDispatcher.CheckBeginInvokeOnUI((Action)(() => managerService.BlogFiles.Add(blog)));
}
}
}
public async Task<bool> Process(ICrawler crawler, PropertyBag propertyBag)
{
string robotsHttpUrl = string.IsNullOrEmpty(_searchPath)
? $"{propertyBag.Step.Uri.GetComponents(UriComponents.SchemeAndServer, UriFormat.Unescaped).ToLowerInvariant()}/robots.txt"
: $"{propertyBag.Step.Uri.GetComponents(UriComponents.SchemeAndServer, UriFormat.Unescaped).ToLowerInvariant()}" + _searchPath;
RobotsTxt.Robots robots;
if (!_robotsInfo.TryGetValue(robotsHttpUrl, out robots))
{
_logger.Verbose("Downloading robots.txt file from {@0}", robotsHttpUrl);
string robotsContext = null;
try
{
robotsContext = await _httpClient.GetStringAsync(robotsHttpUrl);
}
catch (WebException)
{
}
catch (ProtocolViolationException)
{
}
catch (HttpRequestException)
{
}
robots = new RobotsTxt.Robots(robotsContext ?? string.Empty);
_robotsInfo.Add(robotsHttpUrl, robots);
}
if (!robots.HasRules)
{
return true;
}
long crawlDelay = robots.CrawlDelay(propertyBag.UserAgent);
if (crawlDelay > 0)
{
await Task.Delay((int) crawlDelay);
}
bool result = robots.IsPathAllowed(propertyBag.UserAgent, propertyBag.Step.Uri.ToString());
propertyBag[RobotsIsPathAllowedPropertyName].Name = nameof(RobotsPipelineStep);
propertyBag[RobotsIsPathAllowedPropertyName].Value = result;
return result;
}
/// <summary>
/// </summary>
/// The crawler.
/// <param name="crawler"></param>
/// <param name="propertyBag">
/// The property bag.
/// </param>
public Task <bool> Process(ICrawler crawler, PropertyBag propertyBag)
{
AspectF.Define
.NotNull(propertyBag, "propertyBag");
string text = propertyBag.Text;
if (!text.IsNullOrEmpty())
{
MatchCollection matches = s_emailRegex.Value.Matches(text);
propertyBag["Email"].Value = matches
.Cast <Match>()
.Select(match => match.Value)
.ToArray();
}
return(Task.FromResult(true));
}
static void Main(string[] args)
{
var svc = new BikeShareWriteService();
var crawlers = new ICrawler[] {
new MontrealBixiCrawler(svc),
new TorontoBixiCrawler(svc),
new CapitalBikeShareCrawler(svc),
new HubwayCrawler(svc),
new NiceRideMNCrawler(svc),
new VelovCrawler(svc),
new BarclaysCycleHireCrawler(svc),
new BicingCrawler(svc),
};
Parallel.ForEach(crawlers, x => x.Run());
System.Console.ReadLine();
}
private async Task StartSiteSpecificDownloaderAsync(QueueListItem queueListItem, PauseToken pt, CancellationToken ct)
{
IBlog blog = queueListItem.Blog;
blog.Dirty = true;
ProgressThrottler <DownloadProgress> progress = SetupThrottledQueueListProgress(queueListItem);
ICrawler crawler = null;
try
{
crawler = _crawlerFactory.GetCrawler(blog, progress, pt, ct);
queueListItem.InterruptionRequested += crawler.InterruptionRequestedEventHandler;
await crawler.CrawlAsync();
blog.UpdateProgress(false);
}
catch (Exception e)
{
if (!ct.IsCancellationRequested)
{
Logger.Error("CrawlerController.StartSiteSpecificDownloaderAsync: {0}", e);
}
}
finally
{
if (crawler != null)
{
queueListItem.InterruptionRequested -= crawler.InterruptionRequestedEventHandler;
}
crawler?.Dispose();
}
Monitor.Enter(_lockObject);
QueueOnDispatcher.CheckBeginInvokeOnUI(() => _crawlerService.RemoveActiveItem(queueListItem));
Monitor.Exit(_lockObject);
if (!ct.IsCancellationRequested)
{
Monitor.Enter(_lockObject);
QueueOnDispatcher.CheckBeginInvokeOnUI(() => QueueManager.RemoveItem(queueListItem));
Monitor.Exit(_lockObject);
}
}
private async Task AddBlogAsync(string blogUrl)
{
if (string.IsNullOrEmpty(blogUrl))
{
blogUrl = crawlerService.NewBlogUrl;
}
IBlog blog;
try
{
blog = blogFactory.GetBlog(blogUrl, Path.Combine(shellService.Settings.DownloadLocation, "Index"));
}
catch (ArgumentException)
{
return;
}
if (blog.GetType() == typeof(TumblrBlog) && await tumblrBlogDetector.IsHiddenTumblrBlog(blog.Url))
{
blog = PromoteTumblrBlogToHiddenBlog(blog);
}
lock (lockObject)
{
if (managerService.BlogFiles.Any(blogs => blogs.Name.Equals(blog.Name) && blogs.BlogType.Equals(blog.BlogType)))
{
shellService.ShowError(null, Resources.BlogAlreadyExist, blog.Name);
return;
}
if (blog.Save())
{
AddToManager(blog);
}
}
blog = settingsService.TransferGlobalSettingsToBlog(blog);
ICrawler crawler = crawlerFactory.GetCrawler(blog, new CancellationToken(), new PauseToken(),
new Progress <DownloadProgress>());
await crawler.UpdateMetaInformationAsync();
}
static void Main(string[] args)
{
var logger = new ConsoleLogger();
try
{
var loader = new HtmlDocumentLoader();
var repository = new CrawlerRepository();
//var crawlers = new ICrawler[] { new RabotaUaCrawler(logger), new CareersStackoverfowComCrawler(logger) };
var crawlers = new ICrawler[] { new CareersStackoverfowComCrawler(logger) };
foreach (var crawler in crawlers)
{
crawler.Crawl(loader, repository);
}
}
catch (Exception e)
{
logger.Log("FAILED exception caught in Main() method. Exception message: " + e.Message);
logger.Log(e.StackTrace);
}
}
private async Task CheckBlogsOnlineStatusAsync()
{
if (shellService.Settings.CheckOnlineStatusOnStartup)
{
await Task.Run(async() =>
{
var semaphoreSlim = new SemaphoreSlim(25);
IEnumerable <IBlog> blogs = managerService.BlogFiles;
IEnumerable <Task> tasks = blogs.Select(async blog =>
{
await semaphoreSlim.WaitAsync();
ICrawler crawler = CrawlerFactory.GetCrawler(blog, new CancellationToken(), new PauseToken(),
new Progress <DownloadProgress>(), shellService, crawlerService, managerService);
await crawler.IsBlogOnlineAsync();
semaphoreSlim.Release();
});
await Task.WhenAll(tasks);
});
}
}
/// <summary>
/// </summary>
/// <param name="crawler">
/// The crawler.
/// </param>
/// <param name="propertyBag">
/// The property bag.
/// </param>
public Task ProcessAsync(ICrawler crawler, PropertyBag propertyBag)
{
AspectF.Define.
NotNull(crawler, "crawler").
NotNull(propertyBag, "propertyBag");
var text = propertyBag.Text;
if (string.IsNullOrEmpty(text))
{
return(Task.CompletedTask);
}
var matches = this.emailRegex.Value.Matches(text);
propertyBag["Email"].Value = matches.Cast <Match>().
Select(match => match.Value).
Join(";");
return(Task.CompletedTask);
}
public Task<bool> Process(ICrawler crawler, PropertyBag propertyBag)
{
if (propertyBag.StatusCode == HttpStatusCode.OK
&& IsTextContent(propertyBag.ContentType))
{
string content = Encoding.UTF8.GetString(propertyBag.Response);
propertyBag.Title = propertyBag.Step.Uri.ToString();
propertyBag.Text = content.Trim();
MatchCollection urlMatches = _urlMatcher.Matches(propertyBag.Text);
foreach (Match urlMatch in urlMatches)
{
Uri uri;
if (Uri.TryCreate(urlMatch.Value, UriKind.Absolute, out uri))
{
crawler.Crawl(uri, propertyBag);
}
}
}
return Task.FromResult(true);
}
private async Task <int> ProcessCoreAsync(ICrawler crawler, PropertyBag propertyBag)
{
if (propertyBag.StatusCode != HttpStatusCode.OK)
{
return(0);
}
if (!IsTextContent(propertyBag.ContentType))
{
return(0);
}
using (var reader = propertyBag.GetResponse())
{
var content = await reader.ReadToEndAsync().ConfigureAwait(false);
propertyBag.Text = content.Trim();
}
return(0);
}
public Task <bool> Process(ICrawler crawler, PropertyBag propertyBag)
{
if (propertyBag.StatusCode == HttpStatusCode.OK &&
IsTextContent(propertyBag.ContentType))
{
string content = Encoding.UTF8.GetString(propertyBag.Response);
propertyBag.Title = propertyBag.Step.Uri.ToString();
propertyBag.Text = content.Trim();
MatchCollection urlMatches = _urlMatcher.Matches(propertyBag.Text);
foreach (Match urlMatch in urlMatches)
{
Uri uri;
if (Uri.TryCreate(urlMatch.Value, UriKind.Absolute, out uri))
{
crawler.Crawl(uri, propertyBag);
}
}
}
return(Task.FromResult(true));
}
static void Main(string[] args)
{
var logger = new ConsoleLogger();
try
{
var loader = new HtmlDocumentLoader();
var repository = new CrawlerRepository();
//var crawlers = new ICrawler[] { new RabotaUaCrawler(logger), new CareersStackoverfowComCrawler(logger) };
var crawlers = new ICrawler[] { new CareersStackoverfowComCrawler(logger) };
foreach (var crawler in crawlers)
{
crawler.Crawl(loader, repository);
}
}
catch (Exception e)
{
logger.Log("FAILED exception caught in Main() method. Exception message: " + e.Message);
logger.Log(e.StackTrace);
}
}
public Task<bool> Process(ICrawler crawler, PropertyBag propertyBag)
{
AspectF.Define.
NotNull(crawler, "crawler").
NotNull(propertyBag, "propertyBag");
string content = propertyBag.Text;
if (content.IsNullOrEmpty())
{
return Task.FromResult(true);
}
IEnumerable<Tuple<LanguageInfo, double>> languages = _identifier.Identify(content);
Tuple<LanguageInfo, double> mostCertainLanguage = languages.FirstOrDefault();
if (mostCertainLanguage != null)
{
propertyBag[LanguagePropertyName].Value = mostCertainLanguage.Item1.Iso639_3;
}
return Task.FromResult(true);
}
private async Task StartSiteSpecificDownloaderAsync(QueueListItem queueListItem, CancellationToken ct, PauseToken pt)
{
IBlog blog = queueListItem.Blog;
blog.Dirty = true;
ProgressThrottler <DownloadProgress> progress = SetupThrottledQueueListProgress(queueListItem);
ICrawler crawler = crawlerFactory.GetCrawler(blog, ct, pt, progress);
await crawler.CrawlAsync();
Monitor.Enter(lockObject);
QueueOnDispatcher.CheckBeginInvokeOnUI(() => crawlerService.RemoveActiveItem(queueListItem));
Monitor.Exit(lockObject);
if (!ct.IsCancellationRequested)
{
Monitor.Enter(lockObject);
QueueOnDispatcher.CheckBeginInvokeOnUI(() => QueueManager.RemoveItem(queueListItem));
Monitor.Exit(lockObject);
}
}
public Task ProcessAsync(ICrawler crawler, PropertyBag propertyBag)
{
AspectF.Define.
NotNull(crawler, "crawler").
NotNull(propertyBag, "propertyBag");
if (propertyBag.StatusCode != HttpStatusCode.OK)
{
return(Task.CompletedTask);
}
if (!IsPdfContent(propertyBag.ContentType))
{
return(Task.CompletedTask);
}
using (var input = propertyBag.GetResponse())
{
var pdfReader = new PdfReader(input);
try
{
if (pdfReader.Info.TryGetValue("Title", out var title))
{
propertyBag.Title = Convert.ToString(title, CultureInfo.InvariantCulture).Trim();
}
var textExtractionStrategy = new SimpleTextExtractionStrategy();
propertyBag.Text = Enumerable.Range(1, pdfReader.NumberOfPages).
Select(pageNumber => PdfTextExtractor.GetTextFromPage(pdfReader, pageNumber, textExtractionStrategy)).
Join(Environment.NewLine);
}
finally
{
pdfReader.Close();
}
}
return(Task.CompletedTask);
}
public Task<bool> Process(ICrawler crawler, PropertyBag propertyBag)
{
if (propertyBag.StatusCode != HttpStatusCode.OK
|| propertyBag.Response == null)
{
return Task.FromResult(true);
}
PDDocument doc = null;
try
{
doc = PDDocument.load(new ByteArrayInputStream(propertyBag.Response));
PDFTextStripper stripper = new PDFTextStripper();
propertyBag.Text = stripper.getText(doc);
}
finally
{
doc?.close();
}
return Task.FromResult(true);
}
private async Task LoadLibrary()
{
Logger.Verbose("ManagerController.LoadLibrary:Start");
managerService.BlogFiles.Clear();
string path = Path.Combine(shellService.Settings.DownloadLocation, "Index");
try
{
if (Directory.Exists(path))
{
{
IReadOnlyList <IBlog> files = await GetIBlogsAsync(path);
foreach (IBlog file in files)
{
managerService.BlogFiles.Add(file);
}
BlogManagerFinishedLoading?.Invoke(this, EventArgs.Empty);
if (shellService.Settings.CheckOnlineStatusAtStartup)
{
foreach (IBlog blog in files)
{
ICrawler downloader = CrawlerFactory.GetCrawler(blog, new CancellationToken(), new PauseToken(), new Progress <DownloadProgress>(), shellService,
crawlerService, managerService);
await downloader.IsBlogOnlineAsync();
}
}
}
}
}
catch (Exception ex)
{
Logger.Verbose("ManagerController:LoadLibrary: {0}", ex);
shellService.ShowError(ex, Resources.CouldNotLoadLibrary, ex.Data["Filename"]);
}
Logger.Verbose("ManagerController.LoadLibrary:End");
}
private async Task CheckStatusOfBlogsAsync(SemaphoreSlim semaphoreSlim, IBlog blog)
{
await semaphoreSlim.WaitAsync();
ICrawler crawler = null;
try
{
crawler = _crawlerFactory.GetCrawler(blog, new Progress <DownloadProgress>(), new PauseToken(), new CancellationToken());
await crawler.IsBlogOnlineAsync();
}
finally
{
crawler?.Dispose();
try
{
semaphoreSlim.Release();
}
catch (ObjectDisposedException)
{ }
}
}
public Task <bool> Process(ICrawler crawler, PropertyBag propertyBag)
{
if (propertyBag.StatusCode != HttpStatusCode.OK ||
propertyBag.Response == null)
{
return(Task.FromResult(true));
}
PDDocument doc = null;
try
{
doc = PDDocument.load(new ByteArrayInputStream(propertyBag.Response));
PDFTextStripper stripper = new PDFTextStripper();
propertyBag.Text = stripper.getText(doc);
}
finally
{
doc?.close();
}
return(Task.FromResult(true));
}
public MainControl()
{
_mainForm = new MainForm();
_mainForm.Init(this);
_testForm = new TestForm();
_testForm.Init(this);
_fetcherForm = new FetcherForm();
_tagManagementForm = new TagManagementForm();
_tagManagementForm.Init(this);
_viewerForm = new ViewerForm();
_viewerForm.Init(this);
_filterForm = new FilterForm();
_persistence = new FakePersistenceSimulator();
_fileStorage = new HierarchyFileStorage();
_crawler = new SimpleCrawler();
_fetcherDict = new Dictionary <string, IFetcher>();
_fetcherDict["skk"] = new SkkFetcher();
_fetcherDict["skk"].Init(this);
_retryIntervalPage = RETRY_INTERVAL_PAGE;
_retryIntervalIndex = RETRY_INTERVAL_INDEX;
}
public Task <bool> Process(ICrawler crawler, PropertyBag propertyBag)
{
AspectF.Define.
NotNull(crawler, "crawler").
NotNull(propertyBag, "propertyBag");
string content = propertyBag.Text;
if (content.IsNullOrEmpty())
{
return(Task.FromResult(true));
}
IEnumerable <Tuple <LanguageInfo, double> > languages = _identifier.Identify(content);
Tuple <LanguageInfo, double> mostCertainLanguage = languages.FirstOrDefault();
if (mostCertainLanguage != null)
{
propertyBag[LanguagePropertyName].Value = mostCertainLanguage.Item1.Iso639_3;
}
return(Task.FromResult(true));
}
public async Task <bool> Process(ICrawler crawler, PropertyBag propertyBag)
{
Stopwatch sw = Stopwatch.StartNew();
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(propertyBag.Step.Uri);
request.Method = "GET";
try
{
using (HttpWebResponse httpWebResponse = (HttpWebResponse)await request.GetResponseAsync())
using (Stream downloadStream = httpWebResponse.GetResponseStream())
using (MemoryStream ms = new MemoryStream())
{
if (downloadStream != null)
{
await downloadStream.CopyToAsync(ms);
}
sw.Stop();
HttpWebResponseToPropertyBag(httpWebResponse, propertyBag);
propertyBag.Response = ms.ToArray();
propertyBag.DownloadTime = sw.Elapsed;
}
}
catch (WebException ex)
{
HttpWebResponse httpWebResponse = ex.Response as HttpWebResponse;
HttpWebResponseToPropertyBag(httpWebResponse, propertyBag);
propertyBag.DownloadTime = TimeSpan.MaxValue;
}
catch (ProtocolViolationException)
{
propertyBag.StatusCode = HttpStatusCode.Forbidden;
propertyBag.DownloadTime = TimeSpan.MaxValue;
}
return(true);
}
private async Task CheckStatusOfBlogsAsync(SemaphoreSlim semaphoreSlim, IBlog blog)
{
await semaphoreSlim.WaitAsync();
ICrawler crawler = null;
try
{
bool isHiddenTumblrBlog = false;
if (blog.BlogType == BlogTypes.tumblr)
{
isHiddenTumblrBlog = await _tumblrBlogDetector.IsHiddenTumblrBlogAsync(blog.Url);
}
if (isHiddenTumblrBlog)
{
blog.BlogType = BlogTypes.tmblrpriv;
}
crawler = _crawlerFactory.GetCrawler(blog, new Progress <DownloadProgress>(), new PauseToken(), new CancellationToken());
await crawler.IsBlogOnlineAsync();
}
catch (Exception ex)
{
Logger.Error("ManagerController.CheckStatusOfBlogsAsync: {0}", ex);
_shellService.ShowError(ex, $"Online check for '{blog.Name}' failed: {ex.Message}");
blog.Online = false;
}
finally
{
crawler?.Dispose();
try
{
semaphoreSlim.Release();
}
catch (ObjectDisposedException)
{ }
}
}
/// <summary>
/// </summary>
/// <param name = "crawler">
/// The crawler.
/// </param>
/// <param name = "propertyBag">
/// The property bag.
/// </param>
public async Task ProcessAsync(ICrawler crawler, PropertyBag propertyBag)
{
var contentCulture = (CultureInfo)propertyBag["LanguageCulture"].Value;
var cultureDisplayValue = "N/A";
if (!contentCulture.IsNull())
{
cultureDisplayValue = contentCulture.DisplayName;
}
lock (this)
{
Console.Out.WriteLine(ConsoleColor.Gray, "Url: {0}", propertyBag.Step.Uri);
Console.Out.WriteLine(ConsoleColor.DarkGreen, "\tContent type: {0}", propertyBag.ContentType);
Console.Out.WriteLine(ConsoleColor.DarkGreen, "\tContent length: {0}",
propertyBag.Text.IsNull() ? 0 : propertyBag.Text.Length);
Console.Out.WriteLine(ConsoleColor.DarkGreen, "\tDepth: {0}", propertyBag.Step.Depth);
Console.Out.WriteLine(ConsoleColor.DarkGreen, "\tCulture: {0}", cultureDisplayValue);
Console.Out.WriteLine(ConsoleColor.DarkGreen, "\tThreadId: {0}", Thread.CurrentThread.ManagedThreadId);
// Console.Out.WriteLine(ConsoleColor.DarkGreen, "\tThread Count: {0}", crawler.ThreadsInUse);
}
await Console.Out.WriteLineAsync();
}
public async Task<bool> Process(ICrawler crawler, PropertyBag propertyBag)
{
Stopwatch sw = Stopwatch.StartNew();
HttpWebRequest request = (HttpWebRequest) WebRequest.Create(propertyBag.Step.Uri);
request.Method = "GET";
try
{
using (HttpWebResponse httpWebResponse = (HttpWebResponse) await request.GetResponseAsync())
using (Stream downloadStream = httpWebResponse.GetResponseStream())
using (MemoryStream ms = new MemoryStream())
{
if (downloadStream != null)
{
await downloadStream.CopyToAsync(ms);
}
sw.Stop();
HttpWebResponseToPropertyBag(httpWebResponse, propertyBag);
propertyBag.Response = ms.ToArray();
propertyBag.DownloadTime = sw.Elapsed;
}
}
catch (WebException ex)
{
HttpWebResponse httpWebResponse = ex.Response as HttpWebResponse;
HttpWebResponseToPropertyBag(httpWebResponse, propertyBag);
propertyBag.DownloadTime = TimeSpan.MaxValue;
}
catch (ProtocolViolationException)
{
propertyBag.StatusCode = HttpStatusCode.Forbidden;
propertyBag.DownloadTime = TimeSpan.MaxValue;
}
return true;
}
public Task<bool> Process(ICrawler crawler, PropertyBag propertyBag)
{
AspectF.Define
.NotNull(crawler, nameof(crawler))
.NotNull(propertyBag, nameof(propertyBag));
if (propertyBag.StatusCode != HttpStatusCode.OK)
{
return Task.FromResult(true);
}
if (!IsHtmlContent(propertyBag.ContentType))
{
return Task.FromResult(true);
}
HtmlDocument htmlDoc = new HtmlDocument
{
OptionAddDebuggingAttributes = false,
OptionAutoCloseOnEnd = true,
OptionFixNestedTags = true,
OptionReadEncoding = true
};
using (MemoryStream ms = new MemoryStream(propertyBag.Response))
{
Encoding documentEncoding = htmlDoc.DetectEncoding(ms);
ms.Seek(0, SeekOrigin.Begin);
if (!documentEncoding.IsNull())
{
htmlDoc.Load(ms, documentEncoding, true);
}
else
{
htmlDoc.Load(ms, true);
}
}
string originalContent = htmlDoc.DocumentNode.OuterHtml;
if (HasTextStripRules || HasSubstitutionRules)
{
string content = StripText(originalContent);
content = Substitute(content, propertyBag.Step);
using (TextReader tr = new StringReader(content))
{
htmlDoc.Load(tr);
}
}
propertyBag["HtmlDoc"].Value = htmlDoc;
HtmlNodeCollection nodes = htmlDoc.DocumentNode.SelectNodes("//title");
// Extract Title
if (!nodes.IsNull())
{
propertyBag.Title = string.Join(";", nodes.
Select(n => n.InnerText).
ToArray()).Trim();
}
// Extract Meta Data
nodes = htmlDoc.DocumentNode.SelectNodes("//meta[@content and @name]");
if (!nodes.IsNull())
{
propertyBag["Meta"].Value = (
from entry in nodes
let name = entry.Attributes["name"]
let content = entry.Attributes["content"]
where !name.IsNull() && !name.Value.IsNullOrEmpty() && !content.IsNull() && !content.Value.IsNullOrEmpty()
select $"{name.Value}: {content.Value}").ToArray();
}
// Extract text
propertyBag.Text = htmlDoc.ExtractText().Trim();
if (HasLinkStripRules || HasTextStripRules)
{
string content = StripLinks(originalContent);
using (TextReader tr = new StringReader(content))
{
htmlDoc.Load(tr);
}
}
string baseUrl = propertyBag.ResponseUri.GetLeftPart(UriPartial.Path);
// Extract Head Base
nodes = htmlDoc.DocumentNode.SelectNodes("//head/base[@href]");
if (!nodes.IsNull())
{
baseUrl = nodes
.Select(entry => new {entry, href = entry.Attributes["href"]})
.Where(arg => !arg.href.IsNull()
&& !arg.href.Value.IsNullOrEmpty()
&& Uri.IsWellFormedUriString(arg.href.Value, UriKind.RelativeOrAbsolute))
.Select(t =>
{
if (Uri.IsWellFormedUriString(t.href.Value, UriKind.Relative))
{
return propertyBag.ResponseUri.GetComponents(UriComponents.SchemeAndServer, UriFormat.Unescaped) + t.href.Value;
}
return t.href.Value;
})
.AddToEnd(baseUrl)
.FirstOrDefault();
}
// Extract Links
DocumentWithLinks links = htmlDoc.GetLinks();
foreach (string link in links.Links.Union(links.References))
{
if (link.IsNullOrEmpty())
{
continue;
}
string decodedLink = ExtendedHtmlUtility.HtmlEntityDecode(link);
string normalizedLink = NormalizeLink(baseUrl, decodedLink);
if (normalizedLink.IsNullOrEmpty())
{
continue;
}
crawler.Crawl(new Uri(normalizedLink), propertyBag);
}
return Task.FromResult(true);
}
public Task ProcessAsync(ICrawler crawler, PropertyBag propertyBag)
{
return(this.ProcessCoreAsync(crawler, propertyBag));
}
public RunCrawlerCommandHandler(ICrawler crawler, IEventRepository eventRepository)
{
_crawler = crawler;
_eventRepository = eventRepository;
}
public CrawlerResolver(IUserAgentService service) : base(service)
{
_crawler = GetCrawler();
}
