public static SearchResponse PerformSearch(SearchRequest request)
{
Regex FromWildcard(string pattern)
{
return(new Regex("^" + Regex.Escape(pattern)
.Replace("\\*", ".*")
.Replace("\\?", ".") + "$",
RegexOptions.IgnoreCase));
}
var response = new SearchResponse();
var inputFiles = new BlockingCollection <FileInfo>();
var includeFilePatterns = request.IncludeFileWildcards.Distinct().Select(FromWildcard).ToList();
var excludeFileWildcards = request.ExcludeFileWildcards.ToList();
if (request.ExcludeBinaryFiles)
{
excludeFileWildcards.AddRange(BinaryFiles);
}
var excludeFilePatterns = excludeFileWildcards.Distinct().Select(FromWildcard).ToList();
// File list task
Task.Run(() =>
{
try
{
// Get some input
foreach (var file in EnumerateFiles(request, request.Directory, "*", request.DirectoryOption)
.Select(f => new FileInfo(f))
.Where(fi => ToBeSearched(request, fi, includeFilePatterns, excludeFilePatterns)))
{
if (request.Aborted)
{
break;
}
else
{
inputFiles.Add(file);
}
}
}
catch (Exception ex)
{
response.SetError(new ApplicationException("Failed to enumerate files", ex));
}
finally
{
// No more input
inputFiles.CompleteAdding();
}
});
// File contents search tasks
Task.WhenAll(Enumerable.Range(0, Math.Max(request.ParallelSearches, 1))
.Select((i) => CreateSearchTask(request, inputFiles, response)))
.ContinueWith((task) =>
{
// Output finished
response.Results.CompleteAdding();
});
// Return response immediately
return(response);
}
public abstract SearchResult PerformSearch(SearchRequest request, FileInfo file);