put URL

Peter Haworth pete at lcsql.com
Fri Sep 18 17:16:00 EDT 2015

I guess I spoke to soon.

The put URL code is in a button's mouseUp handler and the resetAll is at
the start of handler.  If I set a debug breakpoint at the start of the
mouseUp handler and step through it line by line, I get the expected data
back.  If I remove the breakpoint, put URL returns a socket timeout message.

Next I tried load URL, specifying a callback message and added a handler
for the callback message in the same button as my mouseUp script.  The
callback message never happened.

LC 6.6.5 OSX 10.10


On Fri, Sep 18, 2015 at 12:06 PM Peter Haworth <pete at lcsql.com> wrote:

> I ended up issuing resetAll which seemed to fix the problem.
> On Fri, Sep 18, 2015 at 11:45 AM Richard Gaskin <
> ambassador at fourthworld.com> wrote:
>> Peter Haworth wrote:
>> > The dictionary says all actions that refer to a URL are blocking but if
>> I
>> > execute:
>> >
>> > put URL myURL into tResults
>> >
>> > ... my handler immediately goes to the next statement and tResuls
>> contains
>> > "error URL is currently loading".
>> >
>> > The url is question is to an api so I guess the error could be coming
>> from
>> > there but all the error messages I've received have been wrapped in XML.
>> We really need some clarity on this.  I've been using LC for years, but
>> whatever rules might allow me to anticipate whether network I/O is
>> blocking or non-blocking have eluded me in practice.
>> These days I almost always rely on callbacks, since I know those are
>> always non-blocking, though even then I'm not sure of the implications
>> in terms of overall performance, given that it provides us the illusion
>> of concurrency but without true parallelism.
>> Could someone on the core team draft a page that would help us
>> understand network I/O in terms of blocking and non-blocking, and how
>> non-blocking code is handled in a single-threaded engine?
>> --
>>   Richard Gaskin
>>   Fourth World Systems
>>   Software Design and Development for the Desktop, Mobile, and the Web
>>   ____________________________________________________________________
>>   Ambassador at FourthWorld.com                http://www.FourthWorld.com
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