ifilter

问题 I need to develop an IFilter for Microsoft Search Server 2008 that performs prolonged computations to extract text. Extracting text from one file can take from 5 seconds to 12 hours. How can I desing such an IFilter so that the daemon doesn't reset it on timeout and also other IFilters can be reset on timeout if they hang up? 回答1: 12 hours, wow! If it takes that long and there are many files, your best option would be to create a pre-processing application that would extract the text and make

问题 I need to develop an IFilter for Microsoft Search Server 2008 that performs prolonged computations to extract text. Extracting text from one file can take from 5 seconds to 12 hours. How can I desing such an IFilter so that the daemon doesn't reset it on timeout and also other IFilters can be reset on timeout if they hang up? 回答1: 12 hours, wow! If it takes that long and there are many files, your best option would be to create a pre-processing application that would extract the text and make

问题 For a C# web application I am wanting to index text from PDF, DOC, etc files stored in a database. I have been experimenting with an IFilter example on Code Project which works great for files from the file system, but my files are stored in a MS-SQL database. Can anyone help me locate a sample to extract text from files stored in a database or have an idea on how to modify the Code Project code to work with a database instead of the file system? 回答1: Finally after many hours I figured out

问题 I need to implement an IFilter in Delphi 2010 that can search through Office 2007 docx files and return the text found in the document. The ifilter also needs to use the IPersistStream interface. Thanks 回答1: You don't want to implement an IFilter to parse an Office 2007 docx. You want to use Microsoft's already written IFilter objects, so that you can learn the contents of a docx file. Then you use standard IFilter mechanisms to parse the file contents: procedure TForm1.ProcessFile(filename:

问题 I'm getting my feet wet with handling a load of Office and PDF documents with SQL Server 2012's FILETABLE feature, and using fulltext search on top of that. I've configured my SQL Server to support fulltext search and filestream, and I've created a FILETABLE , dumped 800+ documents of all sorts into the folder, and that all works nicely. In order to be able to fulltext index MS Office documents, I've installed the MS Filter Pack 2.0, and to handle the PDF files, I've downloaded Adobe's

问题 I am moving allong in my project and come to a crossroads dealing with the file content. I have successfully created a working index that has some classification fields but I am know looking to have keyword search applied to the file contents. My issue is I am not sure if passing lucene a reader would translate to the API indexing the entire file contents. I did some searching online and found suggestions that an IFilter would be needed is that true? It seems somewhat complicated. Anyways my

问题 Does anybody know of an API/SDK or IFilter in .NET that can read the subject ('title' metadata) and text from the following files: .PDF .DOC .XLS .PPT .CSV .TXT .DOCX .XLS .PPTX + the OpenOffice and Open Document standards. Open source would be awesome... but commercial is OK too. I can't find anything anywhere! 回答1: I don't think you will be able to find a single IFilter that will be able to access the contents of all of those types. Typically, an IFilter will be for a specific technology.

问题 I have a column, that is encrypted using symmetric key in a database. An encrypted content is just a text. I would like to query this text using full text search. Is it possible? I was thinking about using full text search filters to index a column, but didn't find any ready-to-use filter. So is it possible to develop such a filter, in particular, is it possible to access encryption key, that is stored in a database, from filter code and decrypt the text from the column? Could you recommend

问题 I am trying to set windows desktop search to use a different html filter other than the system default filter(nlhtml.dll). When I look up the PersistentHandler ( HKEY_LOCAL_MACHINE\SOFTWARE\Classes\.html\PersistentHandler ) it points to HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{eec97550-47a9-11cf-b952-00aa0051fe20} . I want to change the value of above clsid. Following is the WiX snippet <?define PersistentHandler_HtmlIFilter="eec97550-47a9-11cf-b952-00aa0051fe20"?> <RegistryValue Action=

问题 Is there a way to know that a call to TextReader.Read or TextReader.ReadToEnd call will hang without throwing exeption before I do the call? try { using (var filterReader = new EPocalipse.IFilter.FilterReader(tempFileName)) { mediaContent = filterReader.ReadToEnd(); } } catch (Exception e) { Log.Error("DealerPortalIndex Error on file: " + tempFileName, e, this); mediaContent = string.Empty; } filterReader.ReadToEnd() hangs and never throws exception on a certain .xls file (maybe more file) I