How HTTP request in scenes with callback, get rooms for section?

[marbe 23]

Hello guys,

please help me with asynchronous call with callback in http request in scenes.

I need write function with http request with return values from this function. same behavior I use in virtual devices.

 

But in scenes this function return nil.

How is possible use http request in scenes with callback.

thank you

Martin

 

easy function with select rooms for one section

 

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All debug texts in function works, but the function doesn't return anything.

Edited December 13, 2018 by marbe

[jayrock 10]

Does this one help? 

 

 

[marbe 23]

Hi,

thank you for answer, but this works not, it ended with fatal error:

[DEBUG] 18:27:40: 2018-12-13 18:27:40.244683 [ fatal] Unknown exception: /opt/fibaro/scenes/146.lua:10: attempt to index global 'Net' (a nil value)

 

My code

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and this code doesn't return any data, its async function...

 

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[ianakapilotlight 21]

On 12/13/2018 at 3:29 PM, marbe said:

Hello guys,

please help me with asynchronous call with callback in http request in scenes.

I need write function with http request with return values from this function. same behavior I use in virtual devices.

 

But in scenes this function return nil.

How is possible use http request in scenes with callback.

thank you

Martin

 

easy function with select rooms for one section

 

Please login or register to see this code.

All debug texts in function works, but the function doesn't return anything.

Hello,

 

The problem you have is that when you call 'getRoomsInSection' the function makes the HTTP call and then returns, it doesn't wait for the response from the HTTP call before returning so the returned value is Nil.

 

You need to process the response from the network device in the callback.

 

Ian

 

[petergebruers 1,268]

On 12/13/2018 at 4:29 PM, marbe said:

please help me with asynchronous call with callback in http request in scenes.

If you are not used to writing code with "callbacks" then you will find it very difficult to write even the smallest program in that style...

 

I can answer your question, see at the end of this post, but I'd like to offer an easier alternative: use(undocumented) blocking calls for HC2 API, like this:

 

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30 minutes ago, ianakapilotlight said:

The problem you have is that when you call 'getRoomsInSection' the function makes the HTTP call and then returns, it doesn't wait for the response from the HTTP call before returning so the returned value is Nil.

 

You need to process the response from the network device in the callback.

 

Exactly. That indeed is the reason why the OP gets "nil" and I think this is what confuses many people.

 

I introduced some concepts in this topic on "setTimeout" which is easier to work with but similar to "http client":