clearOptions Method missing

[petricf]

There is following code in your example "customHTML":

#if CLEAR_OPTIONS
if (server.clearOptions())
ESP.restart();
#endif

The method "clearOptions" is not defined in AsyncFsWebServer as thir compile error states:

/tmp/.arduinoIDE-unsaved2025526-1386448-17i2m7d.0exzg/customOptions/customOptions.ino: In function 'void setup()':
/tmp/.arduinoIDE-unsaved2025526-1386448-17i2m7d.0exzg/customOptions/customOptions.ino:147:10: error: 'class AsyncFsWebServer' has no member named 'clearOptions'

Remark: The old library esp_fs_webserver has this method implemented.

[cotestatnt]

Hi, yes, in fact there isn't a built-in method to delete the settings. I think I'll add it in a future release. Anyway, it's just a file, so you can simply delete it and then restart the ESP.

For example, if you're using LittleFS:

#if CLEAR_OPTIONS
if (LittleFS.remove(server.getConfiFileName())) {
  ESP.restart();
}

#endif

[petricf]

Would this not result in an endless loop ?

Delete config -> restart -> running ... some later reboot -> delete config -> restart ...

[petricf]

Tested - used example customOptions. Renamed option box.

Code inserted after:

// Try to connect to WiFi (will start AP if not connected after timeout)
if (!server->startWiFi(10000)) {
Serial.println("\nWiFi not connected! Starting AP mode...");
server->startCaptivePortal("ESP_AP", "123456789", "/setup");
captiveRun = true;
}

The "My Options" tab was not renamed.

[petricf]

Code added:

Serial.printf("removing %s", server->getConfiFileName());
if (LittleFS.remove(server->getConfiFileName()))
{
Serial.println("restarting ...");
ESP.restart();
}

The console output:

11:51:45.567 -> removing /config/config.jsonrestarting ...
11:51:45.696 -> �B΃K\���L �%��w�B�[+����KÁY�P1��%� )n@���5Y
11:51:45.696 -> ��!LZP���A��-�Y�9���% )���@�Y
11:51:45.696 -> � �HS JJ�P9�N��V�Zr������)��
11:51:45.759 -> rf cal sector: 252
11:51:45.759 -> freq trace enable 0
11:51:45.759 -> rf[112] : 0�/config/config/config.json
11:51:45.791 ->
11:51:45.791 -> Listing directory: /
11:51:45.791 ->
11:51:45.791 -> Listing directory: config
11:51:45.791 -> |__ FILE: raw-html-buttons.htm (82 bytes)
11:51:45.823 -> |__ FILE: raw-javascript-js.js (502 bytes)
11:51:45.823 -> Config file not exist
11:51:45.823 -> Application options NOT loaded!
11:51:45.823 ->
11:51:45.823 -> [E][AsyncFsWebServer.cpp:617] startWiFi(): File not found, will be created new configuration file
11:51:50.912 -> ESP Web Server started on IP Address: 192.168.2.190
11:51:50.912 -> This is "customOptions.ino" example.
11:51:50.944 -> Open /setup page to configure optional parameters.
11:51:50.944 -> Open /edit page to view, edit or upload example or your custom webserver source files.

Still the old menu entries are displayed.

Currently i have no idea where to look next.

[cotestatnt]

Could you share the complete code? As soon as I have some free time, I'll try to reproduce it.

[willi-uce]

I had such problems too, there is a problem with the caching of the browser. The Browser always has old data. In my case it helps to delete the browser cache.

[petricf]

The values in the config seems to be ok. An reload request under "My Options" displays the additional option "Speaker state" i've added:

16:37:15.512 -> This are the current values stored:
16:37:15.512 ->
16:37:15.512 -> Speaker state: on
16:37:15.512 -> LED pin value: 2
16:37:15.512 -> Bool value: true
16:37:15.512 -> Long value: 1234567890
16:37:15.512 -> Float value: 15.500
16:37:15.512 -> String value: Test option String
16:37:15.512 -> Dropdown selected value: Monday
16:37:15.544 ->
16:37:15.544 -> Application option loaded after web request

But this option does not show up in the browser (Firefox).

If i press the shift button when requesting reload by firefox should thow away the cached data. But it displays the /setup-Tab afterwards.

[willi-uce]

The shift button does not change anything in my browser, only delete chronik (for example last hour) helps.

[petricf]

Ok, i took an other PC never used to display this page. Here the output is as requested - everything ok.

So it seems to be a browser cache issue.

Not a good solution. The user has to know that the UI has changed an clear the cache of his browser. How other web servers overcome this ?
Sending a special tag when delivering the page ?
Perhaps by sending a TTL (time to live) ?

[willi-uce]

Have you tested what is happening when you change values in your options page?
When I change a value I have always to clear the browser cache to see the new value on the options page.
(Linux, firefox browser, not tested with windows browsers)

[petricf]

I may be wrong - i got the impression that websockets may help here.

[willi-uce]

For me the following solution worked (see https://forum.arduino.cc/t/redirect-in-asyncwebserver-does-not-reload-the-actual-page/1292677 ):
Before server.init() I added:
DefaultHeaders::Instance().addHeader("Cache-Control", "no-cache, no-store, must-revalidate");
DefaultHeaders::Instance().addHeader("Pragma", "no-cache");
DefaultHeaders::Instance().addHeader("Expires", "0");
After compiling and saving the program to esp you have to clean once the cache of the browser.