[REBOL] Re: Problem with try [ open/direct/binary tcp://... ] Re:(4)
From: rebol:svendx:dk at: 3-Oct-2000 0:45
Hello [eventi--nyic--com],
Actually you can almost use your original function, you just got to be carefull not to
evaluate the error! value.
(As Andrew pointed out).
Some REBOL values defaults to being evaluated on retrival, functions and errors are examples.
Others don't - blocks, etc.
to safely pass error values around you could use a colon in front of the word.
Here's a slightly modified Connect:
Connect: Func [ ip port ] [
error? Gp: try [
Open/direct/binary probe To-url join "tcp://" [ Ip ":" port ]
]
if not error? :gp [
insert gp "GNUTELLA CONNECT/0.4^/^/"
print to-string data: copy gp
]
return :gp
]
Note the additional colons and the error? in the second line.
Now you can do stuff like:
## error? connect "localhost" 1000
tcp://localhost:1000
== true
BTW.
I once started on a REBOL implementation of the Gnutella protocol, so if you're interested
in some marshalling functions, etc - just let me know...
Best regards
Thomas Jensen
On 02-Oct-00, [eventi--nyic--com] wrote:
