[Gambas-user] HttpClient question, now massively parallel!

[Benoît Minisini]

> Hi Ron_2nd
> 
> You're welcome!  I made a couple of improvements while I thought of
> them.  It's probably better not to add the leading zero to the name of
> the HttpClient, so just do something simple like NEW HttpClient AS
> "tube" & freeSlot, then your event handling routines can be simply
> tube0_Finished(), tube1_Finished()... tube200_Finished() etc.  You'll
> probably need to take account of other events too like Connect, Error,
> and Read (I presume in Read you'll actually be getting your data, so
> you'll need to handle a collection of buffers or something...).  You'll
> most likely also need to allow for timeouts.
> 
> I'd also suggest to make the numbered event handlers simple one-liners
> that call back to a real handler... so for the Finished event:
> 
> ' This is the real handler for Finished, it takes a param of the index
> ' of the httpClient that raised the Finished event
> PUBLIC SUB tube_Finished(clientIndex as Integer)
>   ' indicate that the slot has come free
>   slots[clientIndex] = FALSE
>   PRINT "Slot " & clientIndex & " finished"
>   PRINT "Processed GET: " & getters[clientIndex].URL
>   ... do some real work!
> END
> 
> ' Each of the Finished event handlers is now super-simple and
> ' should never need to change, as the real event handler (above) does
> ' the work
> PUBLIC SUB tube0_Finished()
>   tube_Finished(0)
> END
> 
> PUBLIC SUB tube1_Finished()
>   tube_Finished(1)
> END
> 
> ...
> PUBLIC SUB tube200_Finished()
>   tube_Finished(200)
> END
> 
> I'm wondering if there isn't a way to programmatically generate the
> event handlers, and have them know which event fired... freeing you from
> the pain of copy-pasting a bunch of one-line SUBs.
> 
> You may want to get real fancy and start queuing requests once all your
> slots are used up, or maybe just deny requests (note I return -1 if
> there's no free slot) until something comes free again...
> 
> Have fun, let me know if anything is not clear.
> 
> Regards,
> Caveat
> 
> P.S.  Should I have added a disclaimer that my code is not certified for
> use in real-time radiation monitoring systems upon which the fate of the
> world may depend?  ;-)
> 

You don't have to create one event handler for each HttpClient of course! Just 
use the same event handler.

Then how to make the difference between all HttpClient object?

1) Use the LAST keyword to find the HttpClient inside the array where it is 
stored.

2) Or store the index inside the HttpClient.Tag property. That way you get it 
directly without having to do a search.

Regards,

-- 
Benoît Minisini