[PD] Using netsend to send url / text to turn a device on and off

[Jack]

Hey Johannes,

I guess you mean [list fromsymbol] to convert symbols to their
byte-representation ? ;)
++

Jack



Le 24/01/2019 à 18:07, IOhannes m zmölnig a écrit :
> On 1/24/19 5:33 PM, RT wrote:
>> I'm trying to turn on and off a device using Pd by sending a URL. At the
>> moment to turn the device on I just type in a url in the browser and to
>> turn it off I type in another one url .
>> To turn the device on I send http://192.168.1.123/relay/0/?turn=on
>> To turn the device off I send http://192.168.1.123/relay/0/?turn=off
>>
>> I can connect to the device using *connect* and *netsend* but I couldn't
>> find an example / correct syntax / format on how to send the required url
>> out of Pd.
>>
>> This is what I'm using below
>>
>> #N canvas 162 516 623 513 10;
>> #X msg 535 750 \; pd dsp 1;
>> #X obj 536 724 loadbang;
>> #X obj 248 207 netsend;
>> #X msg 272 110 disconnect;
>> #X floatatom 218 272 0 0 0 0 - - -;
>> #X obj 280 275 print;
>> #X msg 403 171 send /relay/0/?turn=off;
>> #X msg 404 136 send /relay/0/?turn=on;
> 
> that won't work.
> when using [send ...(, Pd will use FUDI [1] at the application layer.
> but you want to communicate with a webserver, so you need to use HTTP as
> the application layer protocol.
> the *actual* string (in HTTP) you want to send is something like:
> 
> ~~~
> GET /relay/0/?turn=off HTTP/1.0
> 
> ~~~
> 
> you can use [netsend] to send raw bytes (using the "-b" mode).
> you also can use [list totext] to convert symbols to their
> byte-representation (translating the characters to ASCII).
> since [list totext] only takes single symbols (and not entire messages),
> an even easier way would be to use [fudiformat], which will convert a
> message into it's FUDI representation (with trailing semicolon, and
> everything). just strip of the unwanted characters (the trailing
> semicolon), and append proper CRLF terminators and you should be done.
> 
> something like:
> 
> |
> [symbol on]
> |
> [GET /relay/0/?turn=$1 HTTP/1.0(
> |
> [fudiformat]
> |
> [t   l    l]
> |          [list length]
> |          [- 2]
> [list split]
> |
> [list append 13 10 13 10]
> |
> [list prepend send]
> |
> [list trim]
> |
> [netsend -b]
> 
> fgmadsr
> IOhannes
> 
> 
> [1] https://en.wikipedia.org/wiki/FUDI
> 
> 
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