switch handleWiFi to chunkedResponse

[bwjohns4]

This is actually my first PR, hopefully I'm doing this correctly. I was using a lot of parameters and sometimes they were getting dumped out of the response in handleWiFi(). This is how I fixed the issue.

[bwjohns4]

I modified this to use the underlying functions within chunkedResponseModeStart() and chunkedResponseFinalize() which appear to also be in the ESP32 webserver. The ESP32 library also has the sendContent() functions, only in ESP8266 there is the extra start and finalize functions. I haven't tested this yet, but it should be a 1 for 1 swap as far as functionality goes.

[tablatronix]

Thanks!, I started working on this, you beat me to it.

I was wondering if most of this was actually skipping the string append for paramsout instead of chunked.

Another option would be to switch the few functions to append &ref

[tablatronix]

can you if you get a chance add
page += getParamOut(); back and see if this still works?

I need to build a large param test for myself

[tablatronix]

I made a branch, using page refs and chunked is turned off, curious if it also works
https://github.com/tzapu/WiFiManager/tree/feature_pagestringsref

[tablatronix]

@bwjohns4 have you had a chance to test this branch to see if this also works ( instead of chunked?)

Or do you have an example I can test, or do I just need to use large params or many?

[tablatronix]

bump ,wondering if you tested this test branch to see if it helps instead

[bwjohns4]

@tablatronix , this looks like it should work for the problem I experienced. I was just using lots of parameters with some of them being custom_html (which took a fair bit of memory just on its own) so I had to send them chunked. I was using around 46 parameters total (20 that were just HTML text chunks).

[laurivosandi]

I also need to load large parameters (combobox with timezones) and I can't seem to get it working reliably (form elements missing altogether without any errors on serial). Does chunked transfer address this issue? Perhaps it would make sense to have framework for loading JS assets to the browser separately?