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Add callbacks for ESP8266HTTPUpdate (#6796)

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Replaces abandoned #1817 and #2694

Add optional std::function callback (so it supports lambdas and normal
functions) via ::onStart, ::onEnd, ::onProgress, and ::onError methods.

Update example with their use.

From @baruch's original pull request:
The callback is called when the upgrade actually starts rather than just
the initial query so that the user can know that it will not take longer
and can also prepare for the upgrade by shutting down other works.

From @karlp's original pull request:
Incomplete: I've not updated any documentation yet. If this style looks
good, I'll happily go and update the documentation (likewise for the
examples)
This commit is contained in:
Earle F. Philhower, III
2019-11-19 12:15:57 -07:00
committed by Develo
parent 36f903443b
commit 800794de37
3 changed files with 89 additions and 22 deletions
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23
libraries/ESP8266httpUpdate/examples/httpUpdate/httpUpdate.ino
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@ -43,6 +43,23 @@ void setup() {
}
void update_started() {
USE_SERIAL.println("CALLBACK: HTTP update process started");
}
void update_finished() {
USE_SERIAL.println("CALLBACK: HTTP update process finished");
}
void update_progress(int cur, int total) {
USE_SERIAL.printf("CALLBACK: HTTP update process at %d of %d bytes...\n", cur, total);
}
void update_error(int err) {
USE_SERIAL.printf("CALLBACK: HTTP update fatal error code %d\n", err);
}
void loop() {
// wait for WiFi connection
if ((WiFiMulti.run() == WL_CONNECTED)) {
@ -57,6 +74,12 @@ void loop() {
// value is used to put the LED on. If the LED is on with HIGH, that value should be passed
ESPhttpUpdate.setLedPin(LED_BUILTIN, LOW);
// Add optional callback notifiers
ESPhttpUpdate.onStart(update_started);
ESPhttpUpdate.onEnd(update_finished);
ESPhttpUpdate.onProgress(update_progress);
ESPhttpUpdate.onError(update_error);
t_httpUpdate_return ret = ESPhttpUpdate.update(client, "http://server/file.bin");
// Or:
//t_httpUpdate_return ret = ESPhttpUpdate.update(client, "server", 80, "file.bin");