web_handler Can URL params be accessed in the automation?

[brendann993]

Hi Ssieb, Is it possible to access url params e.g /setval?value=100 from within the automation linked to web_handler?
Use case is I have a template sensor that I want set the of via the web server e.g not using Home Assistant.
I've been able to increment the value by 1 each time the URL is called but I'd like to be able to set the value to a specific value if possible.
Thanks

[ssieb]

The AsyncWebServerRequest is available as request in a lambda. See https://github.com/me-no-dev/ESPAsyncWebServer#request-variables for details.

[brendann993]

Thanks that gets me on the right track. Any idea why they below seems to crash the esp? Basically the server response is empty, the log shows "Got to end of req" but the ESP then drops the connection for a few seconds then reconnects.
Ive been able to access the AsyncWebServerRequest request fine in the function but as soon as I try the stream.print I get that issue. Using stream.print in the lambda itself in yaml also appears to work fine. I have the function in the .h file though as I want to re-use some existing logic.
in device.yaml

- path: /setConfigItem
    on_request:
      - lambda: |-
          gotWebReq(request, stream);
          ESP_LOGD("web_req", "Got to end of req");

in includedFile.h

void gotWebReq(AsyncWebServerRequest request, AsyncResponseStream stream)
{
    stream.print("{\"success\": true}");
    return;
}

[brendann993]

By updating the includedFile.h to use refs with & instead it works. My lack of C++ knowledge doesn't help me understand why.

void gotWebReq(AsyncWebServerRequest &request, AsyncResponseStream &stream)
{
    stream.print("{\"success\": true}");
    return;
}

[brendann993]

Works perfectly as mentioned