Experimenting with sockets in LC .. Windows 7 Pro, LC v8.1.9. I have tsnet
working fine in another project but tsnet appears to be primarily for "sending"
stuff (sorry for the technical jargon). Of course, tsnet can read after it
sends a request. However, sockets let me simply open and READ messages, which
is what I need in this particular setting.
I am using a very simple stack with one card and one button on that card with
my code at the end of this message. The "strange" URL ("Kitchen.local:80") is
the assigned ID for an ESP8266 WiFi module.
This script works fine if the module is "on-line" and responding .. returns the
following from the code running on the ESP8266, as expected:
Data read from socket Kitchen.local:80
HTTP/1.0 200 OK
Content-Type: Kitchen.local/getinterrupt ... NO interrupts ... |2018 8 18|10 49
14|Saturday
Content-Length: 0
Connection: close
going to sleep
ps.. I am "mis-using" some of the HTML fields for different "content" than
normal.. but this is OK and works according to my needs.. not the issue here.
If I substitute "www.google.com:80" as the socket ID, the "socketTimeout"
messages gets generated. That's fine. I'm certain Google does not generate an
output with "sleep" in it.
However, if I substitute "www.googleXXX.com:80" as the socket ID (or distort
*my* ESP8266 ID to a non-existent one), I would have expected some sort of
error message... trapped by the "socketError" handler ... but I get nothing.
I can't seem to get the "socketError" message (or "socketClosed" message for
that matter) to trigger at all. What I'm REALLY looking for is a "timeout"
message, ideally... but a "no connect" or "no such socket" would be fine too.
But "crickets"...
I know that the "socketTimeout" only gets generated after a successful socket
open.
Any help would be greatly appreciated!
local thisSocket, timeoutCount
on mouseUp
put empty
put "Kitchen.local:80" into thisSocket
//put "www.google.com:80" into thisSocket
put 5 into timeoutCount
set the socketTimeoutInterval to 2000
open socket to thisSocket
read from socket thisSocket until "sleep" with message
"socketFinishedReading"
end mouseUp
on socketFinishedReading pSocketID pDataIn
put "Data read from socket" && pSocketID & return & pDataIn
close socket thisSocket
end socketFinishedReading
on socketTimeout theID
put empty
wait 100 milliseconds with messages
put "The connnection: " & theID & " is not responding."
subtract 1 from timeoutCount
if timeoutCount < 1 then
close Socket theID
end if
end socketTimeout
on socketError theID, theError
answer error "There is a problem with connection: " & theID & "Error: " &
theError
close socket theID
end socketError
on socketClosed theID
answer warning "connection: " & theID & " has been closed"
end socketClosed
Douglas Ruisaard
Trilogy Software
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