HTTP Get with dynamic variable ?

[Trieu Le]

Dear all,

I'm a newbie with Node-RED, I have some issues hope everybody help me.

I want to send some dynamic variables to "HTTP in" node with GET method, Please let me know how can i do it ?

e.g. : When i GET: http://my_pi_address/api/variable=12

-> I want to get value 12

Thanks & best regards !

[Dave C-J]

the msg.req.query contains any parameters passed on the get...

http://{my_pi_address}:1880/test?variable=12

will give you an object {variable : 12}

here is a simple example

[{"id":"b25523b4.4daae","type":"http in","name":"","url":"/test","method":"get","swaggerDoc":"","x":317,"y":523,"z":"ecf4c734.130b38","wires":[["f62aa1fb.09d56"]]},{"id":"125b643f.eda49c","type":"http response","name":"","x":646,"y":510,"z":"ecf4c734.130b38","wires":[]},{"id":"f62aa1fb.09d56","type":"function","name":"","func":"console.log(msg.req);\nmsg.payload = \"OK\";\nmsg2 = {payload:msg.req.query};\nreturn [msg,msg2];","outputs":"2","noerr":0,"x":471,"y":548,"z":"ecf4c734.130b38","wires":[["125b643f.eda49c"],["4718d87f.b8e728"]]},{"id":"4718d87f.b8e728","type":"debug","name":"","active":true,"console":"false","complete":"false","x":661,"y":562,"z":"ecf4c734.130b38","wires":[]}]

[Trieu Le]

Hi Dave C-J,

I got your flow and try to run it, but it not working for me, The picture below show error !

Can you please point me what is my wrong ?

Thanks & best regards ! 

[Nicholas O'Leary]

Hi,

Dave's example was http://{my_pi_address}:1880/test?variable=12

You have missed the ?variable part in that screenshot.

Nick

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[Trieu Le]

Hi Nick O'Leary,

Thank for your reply !

I got it and it's working now.

Thanks all so much !

Hi,

Dave's example was http://{my_pi_address}:1880/test?variable=12

You have missed the ?variable part in that screenshot.

Nick

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