On Tue, Feb 9, 2010 at 6:24 AM, Josh Mellicker <j...@dvcreators.net> wrote: > We have been experimenting with many combinations of syntax variants for > "open process"/"read from process" to communicate with various command-line > driven executables. > > We are using a callback loop to read from process, and have tried from 1 to > 800 milliseconds to try and speed up response. > > We have tried read from process until lf, until cr, until eof, until empty, > etc. > > Things are working, but there is always about a 4 - 5 second latency in the > "read from process". Usually this doesn't matter, but in our current project > it needs to be within a second or less. > > > So, I am wondering: > > 1. Is there something we could do to eliminate this delay, some syntax we > haven't yet tried? > > 2. Have other developers noticed this latency in the Rev I/O pipeline? > > 3. Would writing an Rev external that served as a middleman between Rev and a > command-line driven executable eliminate this problem and provide near real > time communication? > > 4. Is there another way to communicate with command-line driven executables > (other than "shell", which doesn't provide for a callback loop to monitor > output)
I use shell with the output piped to a text file that I can monitor. Here is an example script that I use for pinging: function checkPing pIP put specialFolderPath("Desktop") & "/ping.txt" into tFileName if there is a file tFileName then delete file tFileName put "ping -c1 -n " & pIP into tShellCmd put " > " & tFileName & " 2>&1 &" after tShellCmd get shell(tShellCmd) put 0 into timeCheck repeat 50 times add 1 to timeCheck wait 1 tick with messages if there is a file tFileName then put URL ("file:" & tFileName) into tRes if tRes is empty then next repeat -- file created but no result yet put wordOffset("loss", tRes) into tWord if tWord = 0 then next repeat -- file created but result not complete -- if there is a file tFileName then delete file tFileName put word tWord-2 of tRes into tPercent if tPercent = "0%" then return true else return false end if end repeat if there is a file tFileName then delete file tFileName return false end checkPing Cheers, Sarah _______________________________________________ use-revolution mailing list use-revolution@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-revolution