At 14:34 30/11/2004 +0900, kweto wrote:
Hello All,
What I have in mind is somehow "connecting" two stacks that are running on separate computers over a small LAN so that they interact with each other in real time. For example, a student clicks on a button representing the letter "A" on her computer's stack and, immediately, another student on a separate computer's stack sees that same letter appear as well as hears a corresponding sound file.
Now, rather than expecting an entire scripting solution (to which I of course would not say "no"!), I'd just like some pointers in the right direction. Where in the documentation can I learn more? What sample stacks are there that I might tinker with? In the past I've (barely!) managed to incorporate SQL functions into separate stacks running on a LAN, but that was "simply" to read/write data from/to a common text file. I have no idea, however, how to make one stack "aware" of and "reactive" to, for example, mouse-events or global variables that are initiated by another stack. Sockets? Pipes? Is this so complex that I'd better just give up now??
Sockets. And no, it's not difficult - don't give up now :-)
Look at "open socket", "read from socket", etc.
Also, you'll want the "accept" command.
something simple like
- Computer A will "accept" on a socket 7654
(any number in the high thousands should be generally free)
- computer B will "open socket ipaddressOfComputerA:7654"and then they can use "read from .. until CR . with callbackfunction"
and "write to ... "
to communicate. Be sure to use the "read from ... with callback" - this allows the application to continue running normally, and then calls the specified handler when data is available.
I don't know of a sample stack, but I'm sure there will be one somewhere ....
You could look at Bjornke's chat client at http://home.wanadoo.nl/mark.sch/software/chatrev.html though there is a bit more in there than just the simple sample you really want.
-- Alex.
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