in XLLoop we have tow main components:
An Excel addin implementation (XLL written in c++).
A server and framework written in java (and in many other languages - see languages section).
i want to know is any way to replace excel with oracle?
Interesting effort.
Oracle Database can run java code (except the free Oracle XE versions).
To access the functionserver, which seems to be available as a service over http,
you can use the utl_http package from PL/SQL even if you run Oracle XE.
Related
I'm working on a project which is an open-source cloud, similar to Nextcloud. It also provides a file upload and manage feature.
I'd like to have a shell namespace extension which displays those files and folders in the Windows Explorer. Moving, deleting, renaming and editing files / folders should be possible.
Data is available from a REST API or my Electron Client.
I know NodeJS and only some C#.
Is it possible whith NodeJS / Electron to create a shell namespace extension?
If not, are there any free libraries which make this task easier?
Windows Explorer uses 'COM' as its extension model. Therefore, technically speaking, you can use whatever you like, as long as it supports COM.
For NodeJS, you'd be dependent on the runtime to provide the COM support for you and to wrap the appropriate APIs. I'm not aware of any project that does this for the Windows Shell APIs. Here is one for the WinRT APIs.
For C# (.NET), again you'd be dependent on the runtime for COM support. .NET does expose that to you; although it is messy. There are a few projects which wrap the shell APIs and try to hide the COM interop goo as best they can for you.
Here is an open source one.
Here is a commercial one.
Be aware that Microsoft advises against building shell extensions which require a runtime (EG: .NET). The runtime may be loaded into processes that aren't expecting it. Therefore, in practice, Microsoft expects you to use C/C++ to build shell extensions. Here is the Microsoft supplied sample project. It is written in C++.
Wanting to give Swift a try and cheaply as possible.
I'm running
Ubuntu 16.04
SQLite 3.11.0
Swift 3.0-dev
All is working, not pretty though, but I'm having a hell of a time connecting to SQLite within Swift.
Has anyone successfully connected and run a query against SQLite with this setup?
While I've seen a bunch of post for iOS solutions I'm not entirely sure these will work on Ubuntu. I wasn't sure if you could or needed to compile Objective-C on Ubuntu.
Since Objective-C as used on Apple's platforms is not well supported on Linux, I think a better approach might be to access the SQLite C API from Swift by either using a system module or bridging header. You might also want to wrap the SQLite API in a C library exposing a subset of the API that you need in a simplified form more suitable to be called from Swift. You would then invoke the wrapper by creating a system module for it (no system module is needed in this case for the SQLite API) or by using a bridging header.
The following may help:
Compile C code and expose it to Swift under Linux
Linking a C library and its supporting library in Swift (linux)
I am looking to take some propriety program which uses a dBASE backend and a FoxPro client to access it, and move it to a simple Linux solution. Any suggestions for an open source Linux software which can easily import dbf files, and create a front end without much doing?
I am comfortable with Bash, Perl, Python, and html in that order, but I would prefer something that doesn't require much code on my end.
You could look at Servoy. It:
Runs on Linux
Is based on an open-source Java stack (Tomcat/Terracotta/Wicket/Rhino/Hibernate) and is mostly open-source itself.
Is database agnostic, and includes the ability to connect to and work with DBF files directly
Coding is done in Javascript (Rhino) with the ability to inject client-side code directly when needed.
Can target web and desktop from one codebase.
Has a full drag-and-drop IDE which is basically modified Eclipse.
I wrote my own LSP which is working fine. However, I can not catch dns queries. For example there is no function like WSPGetHostByName or WSPGetAddrInfo.
My lsp also supports UDP protocol but it is not working. If I run nslookup from console (cmd.exe) it seems working but i can not catch gethostbyname. Does anyone know how to do that? I don't think writing NSP (Name Service Provider) is a solution. But I might be wrong.
Thanks
We have developed a LSP that can "intercept" DNS queries. The only way to do it is by hooking into all of the DNS functions, keep in mind there are a few challenges you need to solve:
You need to use a good hooking library that will support both 32bit and 64bit code.
The library license must be right for your application, there are some free libraries, but can be used freely only with free projects.
When you hook the functions, you need to make sure not to modify certain values that are not IP based and defer the query to the real function.
Intercepting UDP will not work since the queries are going out from MS DNS client, so unless you write a low level driver like: TDI, NDIS or WFP you must hook the functions (or write a NSP). NSLookup works for you because it creates the DNS queries itself.
My solution would be as follows:
Take the well known web browser: firefox.exe
copy it into a new name: icefoxy.exe
modify the EXE so it will load a custom DLL.
I have already done this a few months ago, but since Firefox is constantly getting updates, that means:
EITHER: keep one version and do not update (at your own risk, may cause security problems since that means vulnerabilities will not be fixed)
OR: Update your modification every time firefox.exe changes.
The DLL can easily be written using Delphi.
The Firefox modification needs assembly language, unless you know how to download all necessary files to compile firefox yourself, have access to a C/C++ compiler (likely mingw-gcc), and be prepared of the fact that there are 2 mutually exclusive standards of C++, and if your g++ (part of the gcc suite) is incompatible with your Firefox source, then your attempt will fail.
I am not a C++ expert myself, so I took the (for me, at least) easier route using machine language, that way I do not need to be a C/C++ expert to get the job done.
Some relative points:
What functions must be hooked to intercept all Firefox's access to dns server(s) ?
I noticed, that if you load a Delphi DLL into Icefoxy.exe (a renamed copy of Firefox.exe)
then a Delphi form's colors are missing, eg. if you set (either in object ispector or in code):
Label1.Color := clLime;
you still see a label withOUT lime background color. I do not know the exact reason, but it seems that Delphi VCL is relying to be used in an EXE, and when you use Delphi VCL components inside a DLL instead of an EXE, some things (such as color) does not work as intended.
I'd be happy to post my code (both assembly language modifications to Firefox and the Delphi DLL source code) , but how/where can I post it so it is publicly viewable ?
I used Delphi 7 to make the DLL.
if you use Delphi 2009 or later, you need to take extra care that any string data passed between the Delphi code and any non-Delphi code has the correct encoding, due to the fact that In Delphi 2009 and all newer versions, the type String is an alias to unicodestring, where in older Delphi versions, the type String is an alias to AnsiString.
At the time I did this, it was just a small experiment to find out if I can force Firefox to load my own DLL inti it's process address space.
Another interesting idea would be to get access to the DOM (Document Object Model) of Firefox from a Delphi DLL, that would give a working alternative to using TWebBrowser (based on ActiveX version of Microsoft's Internet Explorer).
I know there have been components like TWebBrowser based on Firefox, but their problem is that nobody cared to update them for a very long time, so they are compatible only with some very outdated version of Firefox.
My Delphi Prism program needs to create and read and write into an inifile, but I think I noticed Delphi Prism doesn't really support any sort of Inifile structure. (Correct me if I am wrong.)
This leads me into talking about ShineOn library file, which supports inifile. However, it crashes the program when you run your program on Linux under Mono. It doesn't matter if I use any methods from ShineOn or not. As long as the ShineOn library file is listed under uses keyword, the program does not run but crash completely on Linux. Can you create inifile in Delphi Prism for .net that will work on window and Linux(Mono)? If so, how would you do it?
I did search for answer on the internet and Stackoverflow, which led to me C# Class INI file. I thought, it was promising until I noticed that it needs to load Kernel32.dll file to work. (Again correct me if I am wrong). Apparently, there is very little information on the Internet about Delphi Prism Inifile.
Actually you really shouldn't use .ini - Files in .NET (or Mono) environments at all. .NET and Mono offer complete App.config XML-Configuration infrastructure and you should leverage this for your applications. There are a lot of advantages because everything is available type safe and all is covered in the System.Configuration Namespace.
See http://nini.sourceforge.net/
It documented to work on both MS .NET and Mono