Help with error message on net.HTTPClient() call to Raspberry PI php script

[wpeeters 30]

Hi forum users

When the below function on HC2 scene is executed, I get the error 'Operation canceled'.

The scene is executing a php script running on a RPI webserver. That php script is executing another bash script taking snapshots from IP camera and store on a samba share.
Both the php and bash script are running fine without errors if I run them directly on the RPI.
Also the scene is running fine and executing the commands correctly on the RPI but I'm wondering where the error is coming from. It's not a good practise to keep it like that
Since the scripts on the RPI are running without errors, I assume the mistake is in the lua. 
Anybody that can help me?

 

function triggerCamera()
  local selfhttp = net.HTTPClient()
selfhttp:request(url, {
  options={
    headers = selfhttp.controlHeaders,
    method = 'GET',
    timeout = 5000 -- was 5000
  },
  success = function(status)
    info("orange","STATUS: "..status.status)
    log("orange", "DATA: "..status.data)
  end,
  error = function(err)
    info("orange","ERROR: "..err)
  end
})
end -- function

[cag014 731]

Don't know if it's the same case, but I have notice that when using variable by name "url" the things go weird.

Could you please change the "url" to other name like "selfUrl".

 

[wpeeters 30]

Hi @cag014,

I tried your proposal, which was indeed not that bad, but it's not working. 
Anybody have other idea's?

[cag014 731]

Looking at your code I have few questions:

1. Could you please post what exactly variable "url" is. It should include IP address and link...

For example:

local selfhttp = net.HTTPClient()

selfhttp:request("http://127.0.0.1:11111/api/globalVariables",{ ....

Make sure that your url include this data.

2.  You are using commands info and log, I believe they are functions which are part of the scene code right?

3. Could you post the entire code of scene? That should help a lot to find the error...

Edited June 16, 2018 by cag014

[wpeeters 30]

Hi @cag014 & all
I appreciate your help. But finally I've found the issue.
By changing the timeout from 5000 to 15000 the error disappeared.
In the backend, the script is looping in order to take several snapshot of the camera. This takes more than 5 seconds.