public static string GetExtract(BinaryData binaryData, Node node)
{
if (binaryData == null)
{
return(string.Empty);
}
var fname = binaryData.FileName;
if (fname == null)
{
return(string.Empty);
}
var ext = fname.Extension;
if (String.IsNullOrEmpty(ext))
{
return(string.Empty);
}
ITextExtractor extractor = null;
var result = string.Empty;
switch (ext.ToLower())
{
case "contenttype":
case "xml": extractor = new XmlTextExtractor(); break;
case "doc": extractor = new DocTextExtractor(); break;
case "xls": extractor = new XlsTextExtractor(); break;
case "pdf": extractor = new PdfTextExtractor(); break;
case "docx": extractor = new DocxTextExtractor(); break;
case "xlsx": extractor = new XlsxTextExtractor(); break;
case "pptx": extractor = new PptxTextExtractor(); break;
case "txt": extractor = new PlainTextExtractor(); break;
default:
return(String.Empty);
}
var stream = binaryData.GetStream();
if (stream == null)
{
return(String.Empty);
}
if (stream.Length == 0)
{
return(String.Empty);
}
try
{
////-- sync
//result = extractor.Extract(stream);
//-- async
Action <TimeboxedActivity> timeboxedFunctionCall = activity =>
{
var x = (Stream)activity.InArgument;
var extract = extractor.Extract(x);
activity.OutArgument = extract;
};
var act = new TimeboxedActivity();
act.InArgument = stream;
act.Activity = timeboxedFunctionCall;
act.Context = HttpContext.Current;
var finishedWithinTime = act.ExecuteAndWait(Repository.TextExtractTimeout * 1000);
if (!finishedWithinTime)
{
act.Abort();
var msg = String.Format("Text extracting timeout. Version: {0}, path: {1}", node.Version, node.Path);
Logger.WriteWarning(msg);
return(String.Empty);
}
else if (act.ExecutionException != null)
{
WriteError(act.ExecutionException, node);
}
else
{
result = (string)act.OutArgument;
}
}
catch (Exception e)
{
WriteError(e, node);
}
if (String.IsNullOrEmpty(result))
{
var format = @"Couldn't extract text. VersionId: {0}, path: '{1}' ";
var inf = String.Format(CultureInfo.InvariantCulture, format, node.VersionId, node.Path);
Logger.WriteWarning(inf);
}
result = result.Replace('\0', '.');
return(result);
}
public static string GetExtract(Stream stream, string fileName, out string errorMessage)
{
if (stream == null)
{
errorMessage = null;
return(String.Empty);
}
if (stream.Length == 0)
{
errorMessage = null;
return(String.Empty);
}
if (String.IsNullOrEmpty(fileName))
{
errorMessage = "Cannot resolve a TextExtractor if FileName is null or empty";
return(String.Empty);
}
var extension = Path.GetExtension(fileName);
if (String.IsNullOrEmpty(extension))
{
errorMessage = "Cannot resolve a TextExtractor if FileName's extension is null or empty";
return(string.Empty);
}
extension = extension.TrimStart('.');
if (extension.Length == 0)
{
errorMessage = "Cannot resolve a TextExtractor if FileName's extension is empty";
return(string.Empty);
}
extension = extension.ToLower();
if (extension == "txt")
{
errorMessage = null;
return(SenseNet.ContentRepository.Tools.GetStreamString(stream));
}
ITextExtractor extractor = null;
var result = string.Empty;
switch (extension)
{
case "contenttype":
case "xml": extractor = new XmlTextExtractor(); break;
case "doc": extractor = new DocTextExtractor(); break;
case "xls": extractor = new XlsTextExtractor(); break;
case "pdf": extractor = new PdfTextExtractor(); break;
case "docx": extractor = new DocxTextExtractor(); break;
case "xlsx": extractor = new XlsxTextExtractor(); break;
case "pptx": extractor = new PptxTextExtractor(); break;
case "txt": extractor = new PlainTextExtractor(); break;
default:
errorMessage = String.Format("Cannot resolve a TextExtractor for this extension: '{0}'", extension);
return(String.Empty);
}
try
{
//-- sync
result = extractor.Extract(stream);
errorMessage = null;
////-- async
/*
* Action<TimeboxedActivity> timeboxedFunctionCall = activity =>
* {
* var x = (Stream)activity.InArgument;
* var extract = extractor.Extract(x);
* activity.OutArgument = extract;
* };
*
* var act = new TimeboxedActivity();
* act.InArgument = stream;
* act.Activity = timeboxedFunctionCall;
*
* var finishedWithinTime = act.ExecuteAndWait(5000);
* if (!finishedWithinTime)
* {
* act.Abort();
* errorMessage = String.Format("Text extracting timeout. path: {0}", fileName);
* return String.Empty;
* }
* else if (act.ExecutionException != null)
* {
* errorMessage = String.Format("An error occured during extracting text. Path: {0}. Message: {1}", fileName, act.ExecutionException.Message);
* }
* else
* {
* result = (string)act.OutArgument;
* errorMessage = null;
* }
*/
}
catch (Exception e)
{
errorMessage = String.Format("An error occured during extracting text. Path: {0}. Message: {1}", fileName, e.Message);
}
if (String.IsNullOrEmpty(result))
{
var format = @"Couldn't extract text. FileName: '{0}' ";
errorMessage = String.Format(CultureInfo.InvariantCulture, format, fileName);
}
result = result.Replace('\0', '.');
return(result);
}