Send string between apps

[Wolf]

Hi everyone

I want send big string variable from app1 to app2, what is the best or fastest way?

[mk-soft]

Over Network...

Link: viewtopic.php?f=12&t=73882

[infratec]

If your data fits in one packet (1500 bytes)
Use UDP.
It is much faster and a loss on the same PC is nearly impossible.

It is also possible with larger datas, but then you need to handle the incomimg data stream.

[Wolf]

Thanks but I mean on local system, something like share string variable between two program
My string variable is over 600 KB and updated every second in app1,after each string update i want send it (share) with app2 to process it.
Write and read from file is one basic way but i want faster way if possible.

[infratec]

We told you already the easiest way on a local PC

Use localhost (127.0.0.1) as address and choose a free port.

As alternative you have to implement shared memory, which is far more complicated.

[mk-soft]

Already considered to work with 1 app and to outsource the tasks to the threads...

[JHPJHP]

Hi Wolf,

See Windows Services & Other Stuff
- \Windows_Services_Other_Stuff_SRC\Other_Stuff\CopyShare\...

NB*: Includes SendMessage text example and Shared Memory text and image examples.

[skywalk]

If you don't like tcp, just write it to Myfile4u.txt.
Then the reader opens and reads and clears it.
Myfile4u.0.

[oreopa]

On windows API you can use

Code: Select all

SendMessage_(hwnd, #WM_COPYDATA, #Null, *CopyData)

You need the window handle, which you can get from

Code: Select all

EnumWIndows_(...

And you can handle the recieve by a windows callback and checking for #WM_COPYDATA.

[IdeasVacuum]

See netmaestro's example here: viewtopic.php?t=29781

[Wolf]

Thank you all for your solutions.
After test all, i think best one for me and my program is using SendMessage with #WM_COPYDATA.
So thanks again @JHPJHP & @oreopa & @IdeasVacuum for SendMessage codes and examples, especially @JHPJHP for great CopyData example code in "Windows Services & Other Stuff" topic, thanks man

[Joris]

Using the clipboard... send and detect.

[wombats]

Using the clipboard... send and detect.

That’s not a good way. The user wouldn’t appreciate it if something they have on the clipboard disappears.

[Joris]

Using the clipboard... send and detect.

That’s not a good way. The user wouldn’t appreciate it if something they have on the clipboard disappears.

It's just a possibility. Besides let Wolf decide what is useable and good.
What copy/paste does, is mostly well known, so...

[ZX80]

wombats, good question. Therefore I will ask here: how can I save/copy temporarily the global buffer (if not empty) with userdata in other place? Not destroy/clear, but make backup userdata (pictures, links, text etc.) somewhere in available memory block. If I need use the global buffer for my things for a short time. Then to be able to recover userdata. And user will not see changes.
There is some code for analys the global buffer content (to determine type of text):

Code: Select all

OpenClipboard_(0)
lR = EnumClipboardFormats_(lR)

Select lR
  Case #CF_TEXT
    Debug "Text"
    hStrPtr = GetClipboardData_(lR)
    MessageRequester("ClipBoard Text", PeekS(hStrPtr,-1,#PB_Ascii), 0)
    
  Case #CF_BITMAP
    Debug "Bitmap Picture"
    
  Case #CF_METAFILEPICT
    Debug "Meta-File Picture"
    Case #CF_SYLK
    Debug "Microsoft Symbolic Link (SYLK) data."
    
  Case #CF_DIF
    Debug "Software Arts' Data Interchange information."
    
  Case #CF_TIFF
    Debug "Tagged Image File Format (TIFF) Picture"
    
  Case #CF_OEMTEXT
    Debug "Text (OEM)"
    hStrPtr = GetClipboardData_(lR)
    String.s = PeekS(hStrPtr,-1,#PB_Ascii)
    OemToChar_(@String, @String)
    MessageRequester("ClipBoard Text", String, 0)
    
  Case #CF_DIB
    Debug "DIB Bitmap Picture"
    
  Case #CF_PALETTE
    Debug "Colour Palette"
    
  Case #CF_PENDATA
    Debug "Pen Data"
    
  Case #CF_RIFF
    Debug "RIFF Audio data"
    
  Case #CF_WAVE
    Debug "Wave File"
    
  Case #CF_UNICODETEXT
    Debug "Text (Unicode)"
    hStrPtr = GetClipboardData_(lR)
    MessageRequester("ClipBoard Text", PeekS(hStrPtr,-1,#PB_Unicode), 0)
    
  Case #CF_ENHMETAFILE
    Debug "Enhanced Meta-File Picture"
    
  Case #CF_HDROP
    Debug "File List"
    
  Case #CF_LOCALE
    Debug "Text Locale Identifier"
    
  Default
    Debug "Unknown encoding or data = " + lR   
    hStrPtr = GetClipboardData_(lR)
    MessageRequester("ClipBoard Text", PeekS(hStrPtr,-1,#PB_Unicode), 0)
EndSelect
  
CloseClipboard_()