Is there a POST size limit in WebServer?

[rsiemens77]

I have an HTML form with a textarea. It gets posted to the "WebServer" api. When the text area is filled beyond about ~2.5 to 3K, I get errors. Usually the browser reports connection reset. Sometimes I see the stack trace below. Is this related to a size limit somewhere? If so, can I adjust it? Or is there an alternative approach I can use?

`
0x400f6619: String::move(String&) at C:/xif/frameworks/esp-idf-v4.4.7/components/arduino/cores/esp32/WString.cpp:237

0x400f67e2: String::operator=(String&&) at C:/xif/frameworks/esp-idf-v4.4.7/components/arduino/cores/esp32/WString.cpp:277

0x400fa54e: WebServer::_parseRequest(WiFiClient&) at C:/xif/frameworks/esp-idf-v4.4.7/components/arduino/libraries/WebServer/src/Parsing.cpp:217

0x400f8c6f: WebServer::handleClient() at C:/xif/frameworks/esp-idf-v4.4.7/components/arduino/libraries/WebServer/src/WebServer.cpp:302
`

[rsiemens77]

After further testing, it seems likely it's more related to timing - possible timeout? The same length post can sometimes fail and sometimes succeed. So, could be timing related: it's just that a longer post takes longer.

[rsiemens77]

Seems this may have been memory usage related. The WiFi gobbles so much RAM on ESP32. I did some optimization and was able to clear this up when there's more memory available.