internal override async Task <JObject> GetMetaDataAsync(Element element, string fileType)
{
string entityPath = GetMetaUrl(element.Class, element.Id, fileType);
if (!File.Exists(entityPath))
{
s_log.Warn(LocalizationService.FormatResourceString("MetaFileReaderMessage01", entityPath));
return(null);
}
string jsonString = await File.ReadAllTextAsync(entityPath);
if (string.IsNullOrWhiteSpace(jsonString))
{
return(null);
}
try
{
return(JsonConvert.DeserializeObject <JObject>(jsonString));
}
catch
{
s_log.Warn(LocalizationService.FormatResourceString("MetaFileReaderMessage02"));
return(null);
}
}
/// <summary>
/// Prüfe das Element zuvor, bevor man es zum Indexieren schickt.
/// <para>Es werden mehrere Parameter geprüft.
/// <list type="number">
/// <item>Soll das Element überhaupt indexiert werden: Soll diese Klasse indexiert werden? Sind alle Pflichtfelder vorhanden? Ist irgendein Ausnahmewert vorhanden?</item>
/// <item>Ist das Element bereits indexiert?</item>
/// <item>Hat sich der Inhalt des Elements geändert? </item>
/// </list>
/// </para>
/// </summary>
/// <param name="element">Das Element, das indexiert werden soll.</param>
internal async Task SendToIndexerAsync(Element element)
{
bool isAlreadyIndexed = IsAlreadyIndexed(element);
bool isForbidden = RemoveWhenForbidden(element, isAlreadyIndexed);
if (isForbidden)
{
return;
}
using ElementLogContext context = new();
bool hasContentChanged = HasContentChanged(element);
bool isIndexingNeeded = RemoveWhenChanged(element, isAlreadyIndexed, hasContentChanged, context);
if (isIndexingNeeded == false)
{
return;
}
_log.Info(LocalizationService.FormatResourceString("CrawlerIndexerInterfaceMessage03", element.Id));
bool isIndexingSuccess = await _indexer.AddElementToIndexAsync(element);
MarkElementFound(element, context, isIndexingSuccess);
}
/// <summary>
///
/// </summary>
/// <param name="jobIdParameters"></param>
internal static void ScheduleJobs(List <string> jobIdParameters)
{
DateTime startTime = DateTime.Now;
log.Info(LocalizationService.FormatResourceString("JobSchedulerMessage01", startTime));
ErrorControlService.GetService().StartRuntimeStopwatch();
JobManager manager = JobManager.GetJobManager();
if (manager.AllJobs == null)
{
return;
}
int jobCount = manager.AllJobs.Count;
List <string> jobIds = new(jobCount);
for (int i = 0; i < jobCount; i++)
{
JobConfig jobConfig = manager.AllJobs[i];
if (jobConfig == null)
{
continue;
}
ExitWhenInvalidId(jobIds, jobConfig.Id);
InitNewThread(jobIdParameters, jobIds, jobConfig);
}
LogTime(startTime);
}
/// <summary>
///
/// </summary>
/// <param name="element"></param>
/// <returns></returns>
internal async Task <List <Element> > CrawlAttachementsAsync(Element element)
{
ConverterService converter = new();
List <Element> attachements = new();
StatisticService statisticService = StatisticService.GetService(_jobConfig.Id);
foreach (var attachementName in element.AttachementNames)
{
ConverterResult res;
try
{
res = await converter.ConvertAttachementAsync(element, attachementName);
}
catch
{
_log.Error(LocalizationService.FormatResourceString("AttachementCrawlerMessage01", attachementName, element.Id));
ErrorControlService.GetService().IncreaseErrorCount();
continue;
}
Element attachement = element.Clone() as Element;
OverwriteAttachementValues(attachement, res, attachementName);
attachements.Add(attachement);
statisticService.IncreaseFoundDocumentsCount();
}
return(attachements);
}
/// <summary>
///
/// </summary>
/// <param name="temporaryValue"></param>
/// <param name="expressionEvaluator"></param>
/// <param name="metaData"></param>
/// <returns>Eine Liste mit den Werten oder null, wenn der Ausdruck kein Ergebnis liefert.</returns>
private string[] EvaluateField(string temporaryValue, ExpressionEvaluator expressionEvaluator, MetaDataCollection metaData)
{
if (!ExpressionEvaluator.IsExpression(temporaryValue, out string expression))
{
_log.Debug(LocalizationService.FormatResourceString("ElementCrawlerMessage02", temporaryValue));
return(string.IsNullOrWhiteSpace(temporaryValue) ? null : new string[] { temporaryValue });
}
if (ExpressionEvaluator.IsVariableExpression(expression, out string variableName))
{
string value = Util.RemoveMarkup(MetaAnalyzer.ExtractValue(metaData, variableName));
_log.Debug(LocalizationService.FormatResourceString("ElementCrawlerMessage03", expression, value));
return(string.IsNullOrWhiteSpace(value) ? null : new string[] { value });
}
if (ExpressionEvaluator.IsConverterExpression(expression, out string converterClassName, out string[] converterParameterNames))
{
int parameterCount = converterParameterNames.Length;
string[] converterParameterValues = new string[parameterCount];
for (int i = 0; i < parameterCount; i++)
{
string converterParameter = converterParameterNames[i];
bool isVariable = ExpressionEvaluator.IsVariableExpression(converterParameter, out string converterVariableName);
converterParameterValues[i] = isVariable ?
Util.RemoveMarkup(MetaAnalyzer.ExtractValue(metaData, converterVariableName)) :
converterParameterNames[i];
}
_log.Debug(LocalizationService.FormatResourceString("ElementCrawlerMessage04", expression, converterClassName, ""));
return(ExpressionEvaluator.EvaluateAsConverter(converterClassName, converterParameterValues));
}
return(null);
}
/// <summary>
/// Die Daten eines Elements analysieren und daraus ein Objekt erstellen.
/// </summary>
/// <param name="id">Die ID des Element, zum Beispiel GR_389F860B088563B1.</param>
/// <returns>Ein Objekt, das die Daten des Elements in Enable Now enthält</returns>
internal async Task <Element> CrawlElementAsync(string id)
{
Element element = new(id);
FillInitialFields(element);
MetaDataCollection metaData = await MetaAnalyzer.LoadMetaFilesAsync(element);
FillFields(element, metaData);
AddAssets(element, metaData);
string autostartId = GetAutostartId(metaData);
StatisticService statisticService = StatisticService.GetService(_jobConfig.Id);
if (autostartId != null)
{
try
{
Element autostartElement = await CrawlElementAsync(autostartId);
OverwriteValuesByAutostartElement(element, autostartElement);
statisticService.IncreaseAutostartElementsCount();
}
catch
{
_log.Warn(LocalizationService.FormatResourceString("ElementCrawlerMessage01"));
}
}
element.Hash = element.GenerateHashCode();
SetDateValue(element);
statisticService.IncreaseFoundDocumentsCount();
return(element);
}
/// <summary>
/// Prüft, ob das Element indexiert oder ausgeschlossen werden soll.
/// <para>Es wird durch alle Feldnamen in der Ausnahmeliste iteriert. Falls das Element ebenfalls ein Feld mit diesen Namen enthält,
/// wird durch dessen Werte iteriert. Es wird geprüft, ob der Wert mit dem regulären Ausdruck in der Ausnahmeliste übereinstimmt.</para>
/// </summary>
/// <param name="element">Das Objekt des Elements, das geprüft werden soll.</param>
/// <returns>Gibt wahr zurück, wenn ein Wert auf der Ausnahmeliste erscheint, ansonsten falsch.</returns>
private bool HasBlacklistedValue(Element element)
{
// Werte, die in beiden Listen sind
var fieldnames = from fieldName in _jobConfig.BlacklistFields.Keys
join key in element.Fields.Keys
on fieldName equals key
select fieldName;
foreach (var fieldName in fieldnames)
{
var values = element.Fields[fieldName];
foreach (var value in values)
{
try
{
if (Regex.IsMatch(value, _jobConfig.BlacklistFields[fieldName]))
{
return(true);
}
}
catch
{
_log.Debug(LocalizationService.FormatResourceString("CrawlerIndexerInterfaceMessage05", element.Id));
}
}
}
return(false);
}
/// <summary>
/// Das Programm beenden, wenn die JobId leer ist oder doppelt auftritt.
/// </summary>
/// <param name="jobIds">Liste der JobIds, die bereits abgearbeitet sind</param>
/// <param name="jobConfig"></param>
private static void ExitWhenInvalidId(List <string> jobIds, string jobId)
{
if (jobIds.Contains(jobId) || string.IsNullOrWhiteSpace(jobId))
{
log.Fatal(LocalizationService.FormatResourceString("JobSchedulerMessage04", jobId));
Environment.Exit(-1);
}
}
/// <summary>
///
/// </summary>
/// <param name="startTime"></param>
private static void LogTime(DateTime startTime)
{
DateTime endTime = DateTime.Now;
TimeSpan duration = endTime - startTime;
log.Info(LocalizationService.FormatResourceString("JobSchedulerMessage02", duration));
log.Info(LocalizationService.FormatResourceString("JobSchedulerMessage03", endTime));
}
/// <summary>
///
/// </summary>
/// <param name="id"></param>
internal void RemoveElementCompletly(string id)
{
_log.Debug(LocalizationService.FormatResourceString("CrawlerIndexerInterfaceMessage04", id));
using ElementLogContext context = new();
context.RemoveElementLog(id, _jobConfig.Id);
_indexer.RemoveElementFromIndexAsync(id);
StatisticService.GetService(_jobConfig.Id).IncreaseRemovedDocumentsCount();
}
private void CheckPath(string path)
{
if (string.IsNullOrWhiteSpace(path))
{
_log.Error(LocalizationService.FormatResourceString("JobWriterMessage01"));
throw new ArgumentException("JobWriterMessage01");
}
}
private static void ConfigLogging()
{
var logFile = Path.Combine(Util.GetApplicationRoot(), "log4net.xml");
var logDirectory = Path.Combine(Util.GetApplicationRoot(), "logs");
if (Util.IsDirectoryWritable(logDirectory))
{
log.Warn(LocalizationService.FormatResourceString("ProgramMessage01"));
}
XmlConfigurator.Configure(new FileInfo(logFile));
}
/// <summary>
/// Erstellt ein neues Objekt, das einem Element in Enable Now entspricht.
/// </summary>
/// <param name="id">Die ID es Enable Now Elements.</param>
/// <exception cref="ArgumentException">Wirft eine Ausnahme, falls die ID ungültig ist.</exception>
internal Element(string id)
{
if (!Validator.Validate(id, Validator.EnableNowIdPattern))
{
string message = LocalizationService.FormatResourceString("ElementMessage01", id);
_log.Error(message);
throw new ArgumentException(message);
}
Id = id;
Class = Id.Split('_')[0];
}
/// <summary>
///
/// </summary>
/// <returns></returns>
internal IEnumerable <string> ReadJobPaths()
{
try
{
return(Directory.EnumerateFiles(JobDirectory));
}
catch (Exception e)
{
log.Error(LocalizationService.FormatResourceString("JobReaderMessage01", JobDirectory), e);
return(null);
}
}
/// <summary>
/// Liest den Text aus der Datei aus.
/// </summary>
/// <param name="filePath">Pfad zu der Datei.</param>
/// <returns>Text der Datei.</returns>
private string ReadFile(string filePath)
{
try
{
return(File.ReadAllText(filePath));
}
catch (Exception e)
{
log.Error(LocalizationService.FormatResourceString("JobReaderMessage04", filePath), e);
return(null);
}
}
/// <summary>
///
/// </summary>
/// <param name="fields"></param>
/// <param name="fieldName"></param>
/// <exception cref="ArgumentNullException"></exception>
/// <returns></returns>
private string GetConverterFieldValue(JToken fields, string fieldName)
{
var field = fields[fieldName]?[0];
if (field == null)
{
string message = LocalizationService.FormatResourceString("ConverterServiceMessage03", fieldName);
_log.Error(message);
throw new ArgumentNullException(message);
}
return(field.Value <string>());
}
/// <summary>
///
/// </summary>
/// <param name="jobIdParameters"></param>
/// <param name="jobIds"></param>
/// <param name="jobConfig"></param>
private static void InitNewThread(List <string> jobIdParameters, List <string> jobIds, JobConfig jobConfig)
{
if (jobIdParameters.Count == 0 || jobIdParameters.Contains(jobConfig.Id))
{
jobIds.Add(jobConfig.Id);
Task t = Task.Run(delegate() { RunJob(jobConfig); });
t.Wait();
}
else
{
log.Info(LocalizationService.FormatResourceString("JobSchedulerMessage05", jobConfig.Id));
}
}
/// <summary>
/// Liest den Text aus einer Datei.
/// </summary>
/// <returns></returns>
private static string ReadFile()
{
try
{
return(File.ReadAllText(s_filePath));
}
catch (Exception e)
{
string message = LocalizationService.FormatResourceString("ConfigReaderMessage01", s_filePath);
s_log.Error(message);
throw new Exception(message, e);
}
}
private static List <string> GetJobParameter(string[] args)
{
if (args.Length == 0)
{
return(new List <string>());
}
List <string> parameters = args.Where(arg => !string.IsNullOrWhiteSpace(arg)).ToList();
foreach (string p in parameters)
{
log.Info(LocalizationService.FormatResourceString("ProgramMessage02", p));
}
return(parameters);
}
/// <summary>
///
/// </summary>
/// <param name="element"></param>
/// <param name="context"></param>
/// <param name="isIndexingSuccess"></param>
private void MarkElementFound(Element element, ElementLogContext context, bool isIndexingSuccess)
{
if (isIndexingSuccess)
{
context.SetElementFound(element, _jobConfig.Id, true);
_log.Info(LocalizationService.FormatResourceString("CrawlerIndexerInterfaceMessage06", element.Id));
StatisticService.GetService(_jobConfig.Id).IncreaseIndexedDocumentsCount();
}
else
{
_log.Error(LocalizationService.FormatResourceString("CrawlerIndexerInterfaceMessage08", element.Id));
ErrorControlService.GetService().IncreaseErrorCount();
}
}
internal override async Task <JObject> GetMetaDataAsync(Element element, string fileType)
{
string entityUrl = GetMetaUrl(element.Class, element.Id, fileType);
try
{
string jsonString = await new HttpRequest(_jobConfig).SendRequestAsync(entityUrl);
return(JsonConvert.DeserializeObject <JObject>(jsonString));
}
catch
{
s_log.Warn(LocalizationService.FormatResourceString("MetaWebsiteReaderMessage01"));
return(null);
}
}
/// <summary>
///
/// </summary>
/// <param name="element"></param>
/// <param name="isAlreadyIndexed"></param>
private bool RemoveWhenForbidden(Element element, bool isAlreadyIndexed)
{
if (!ShouldBeIndexed(element))
{
_log.Info(LocalizationService.FormatResourceString("CrawlerIndexerInterfaceMessage01", element.Id));
StatisticService.GetService(_jobConfig.Id).IncreaseSkippedDocumentsCount();
if (isAlreadyIndexed)
{
RemoveElementCompletly(element);
}
;
return(true);
}
return(false);
}
/// <summary>
///
/// </summary>
/// <param name="content"></param>
/// <returns></returns>
private async Task<string> SendFormAsync(string url, string content)
{
Log.Info(LocalizationService.FormatResourceString("HttpFormAuthenticationMessage02", url));
List<KeyValuePair<string, string>> body = new()
{
new KeyValuePair<string, string>(jobConfig.AuthUserControl, jobConfig.AuthUser),
new KeyValuePair<string, string>(jobConfig.AuthPasswordControl, jobConfig.AuthPassword)
};
foreach (var param in jobConfig.AuthFormActionAdditionalParameters)
{
body.Add(new KeyValuePair<string, string>(param.Key, param.Value));
}
AddFormParameters(content, body);
HttpResponseMessage response = await client.PostAsync(url, new FormUrlEncodedContent(body));
return await response.Content.ReadAsStringAsync();
}
/// <summary>
/// Liest die Konnektor-Konfiguration aus der config.json heraus.
/// </summary>
/// <returns></returns>
internal static Config ReadConfig()
{
Config config;
try
{
string jsonString = ReadFile();
config = JsonConvert.DeserializeObject <Config>(jsonString);
}
catch (Exception e)
{
string message = LocalizationService.FormatResourceString("ConfigReaderMessage02", s_filePath);
s_log.Error(message);
throw new Exception(message, e);
}
return(config);
}
/// <summary>
///
/// </summary>
/// <param name="element"></param>
/// <returns></returns>
internal async override Task <bool> AddElementToIndexAsync(Element element)
{
Config config = ConfigManager.GetConfigManager().ConnectorConfig;
string paramString = GetIndexingParameterString(element);
string url = $"{config.IndexUrl}{paramString}";
try
{
await new HttpRequest(JobConfig).SendRequestAsync(url);
return(true);
}
catch (Exception e)
{
_log.Error(LocalizationService.FormatResourceString("JsonIndexerMessage01"), e);
return(false);
}
}
/// <summary>
///
/// </summary>
/// <param name="element"></param>
/// <param name="fileName"></param>
/// <exception cref="Exception"></exception>
/// <returns></returns>
internal async Task <ConverterResult> ConvertAttachementAsync(Element element, string fileName)
{
string url = GetConverterRequestUrl(element, fileName);
string result;
try
{
result = await new HttpRequest(JobManager.GetJobManager().SelectedJobConfig).SendRequestAsync(url);
}
catch
{
_log.Error(LocalizationService.FormatResourceString("ConverterServiceMessage02"));
throw;
}
return(ExtractValues(result));
}
/// <summary>
///
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
internal async override Task <bool> RemoveElementFromIndexAsync(string id)
{
Config config = ConfigManager.GetConfigManager().ConnectorConfig;
string encodedParam = HttpUtility.UrlEncode($"[{GetElasticsearchId(id)}]");
string url = $"{config.RemoveUrl}{encodedParam}";
try
{
await new HttpRequest(JobConfig).SendRequestAsync(url);
return(true);
}
catch (Exception e)
{
_log.Error(LocalizationService.FormatResourceString("JsonIndexerMessage02"), e);
return(false);
}
}
/// <summary>
///
/// </summary>
/// <param name="form"></param>
/// <param name="formData"></param>
private void AddFormParameters(HtmlNode form, List<KeyValuePair<string, string>> formData)
{
if (form == null) return;
var inputElements = form.SelectNodes("//input");
foreach (var inputElement in inputElements)
{
string name = inputElement.GetAttributeValue("name", "");
if (!jobConfig.AuthFormActionAdditionalParameters.ContainsKey(name) &&
!name.Equals(jobConfig.AuthUserControl) &&
!name.Equals(jobConfig.AuthPasswordControl) &&
name.Length > 0)
{
string value = inputElement.GetAttributeValue("value", "");
Log.Debug(LocalizationService.FormatResourceString("HttpFormAuthenticationMessage01", name, value));
formData.Add(new KeyValuePair<string, string>(name, value));
}
}
}
/// <summary>
///
/// </summary>
/// <param name="jobConfig"></param>
private static void RunJob(JobConfig jobConfig)
{
JobManager.GetJobManager().SelectedJobConfig = jobConfig;
PublicationCrawler crawler = new();
crawler.Initialize();
crawler.StartCrawling();
crawler.CompleteCrawling();
StatisticService.GetService(jobConfig.Id).PrintStatistic();
ErrorControlService.GetService().PrintErrorStatistic();
StatisticService service = StatisticService.GetService(jobConfig.Id);
string text = LocalizationService.FormatResourceString("MailClientMessage01",
jobConfig.Id,
DateTime.Now,
service.FoundDocumentsCount,
service.IndexedDocumentsCount,
service.RemovedDocumentsCount);
new MailService(jobConfig).SendMail(text);
}
/// <summary>
///
/// </summary>
/// <param name="element"></param>
/// <param name="isAlreadyIndexed"></param>
/// <param name="hasContentChanged"></param>
/// <param name="context"></param>
/// <returns></returns>
private bool RemoveWhenChanged(Element element, bool isAlreadyIndexed, bool hasContentChanged, ElementLogContext context)
{
if (isAlreadyIndexed)
{
if (hasContentChanged)
{
_log.Info(LocalizationService.FormatResourceString("CrawlerIndexerInterfaceMessage02", element.Id));
RemoveElementCompletly(element);
return(true);
}
else
{
_log.Info(LocalizationService.FormatResourceString("CrawlerIndexerInterfaceMessage07", element.Id));
StatisticService.GetService(_jobConfig.Id).IncreaseUnchangedDocumentsCount();
context.SetElementFound(element, _jobConfig.Id, true);
return(false);
}
}
return(true);
}
