add callback to HTTPUpdate

[jayanta525]

• add callback function to HTTPUpdate
• update example to print progress
• fix ArduinoIDE syntax coloring
• reference: ESP8266httpUpdate

CALLBACK:  HTTP update process started
CALLBACK:  HTTP update process at 0 of 365728 bytes...
CALLBACK:  HTTP update process at 0 of 365728 bytes...
CALLBACK:  HTTP update process at 4096 of 365728 bytes...

Signed-off-by: Jayantajit Gogoi [email protected]

[CLAassistant]

All committers have signed the CLA.

[me-no-dev]

Thanks @jayanta525 :)

[epiller]

@jayanta525 No matter what I do, I always get error: 'class HTTPUpdate' has no member named 'onError', even though I can see the methods in source files. Same goes for onStart, onProgress and onEnd.
I'm running the newest ESP32 Core and everything else regarding HTTPUpdate is working normally. Even the included example doesn't compile for that reason. The issue is the same on both Arduino IDE and PlatformIO.
Any suggestions?

[jayanta525]

@epiller I tested with the latest release 2.0.0, and the example compiled without any errors on ArduinoIDE.

Please make sure you're using the correct src and header files.

You can turn on verbose output during compilation in ArduinoIDE and check whether the compiler is using the correct HTTPUpdate.cpp

[epiller]

@jayanta525 I just found out that while ESP8266 uses the same repo both on Arduino IDE and PlatformIO, ESP32 on PlatformIO utilizes https://github.com/platformio/platform-espressif32, which isn't the same as this one, so I guess I'll have to figure something out. Sorry and thank you for your help!

[jayanta525]

@epiller You can add the HTTPUpdate library from this repo to lib/ folder in PlatformIO project directory.

And edit platformio.ini to ignore the built-in library.
lib_ignore = HTTPUpdate

lib_extra_dirs =
    lib/

https://docs.platformio.org/en/latest/projectconf/section_env_library.html#lib-extra-dirs

And don't forget to set ldf_mode
https://docs.platformio.org/en/latest/projectconf/section_env_library.html#lib-ldf-mode

[epiller]

@jayanta525 That solved it and it's fully working now! Thank you so much man!