Update HTTPUpdateServer.h

kapyaar · web-flow · commit d3afef721790 · 2025-07-11T12:55:28.000-04:00
if (!Update.begin(SPIFFS.totalBytes(), U_SPIFFS)) { throws an error "Update error: Bad Size Given". Changing to if (!Update.begin(UPDATE_SIZE_UNKNOWN, U_SPIFFS)) { fixes espressif#9967
diff --git a/libraries/HTTPUpdateServer/src/HTTPUpdateServer.h b/libraries/HTTPUpdateServer/src/HTTPUpdateServer.h
@@ -123,7 +123,7 @@ class HTTPUpdateServer {
             Serial.printf("Update: %s\n", upload.filename.c_str());
           }
           if (upload.name == "filesystem") {
-            if (!Update.begin(SPIFFS.totalBytes(), U_SPIFFS)) {  //start with max available size
+            if (!Update.begin(UPDATE_SIZE_UNKNOWN, U_SPIFFS)) {  //Instead of SPIFFS.totalBytes(). Fix https://github.com/espressif/arduino-esp32/issues/9967
               if (_serial_output) {
                 Update.printError(Serial);
               }

Original file line number	Diff line number	Diff line change
`@@ -123,7 +123,7 @@ class HTTPUpdateServer {`
`123`	`123`	`Serial.printf("Update: %s\n", upload.filename.c_str());`
`124`	`124`	`}`
`125`	`125`	`if (upload.name == "filesystem") {`
`126`		`- if (!Update.begin(SPIFFS.totalBytes(), U_SPIFFS)) { //start with max available size`
	`126`	`+ if (!Update.begin(UPDATE_SIZE_UNKNOWN, U_SPIFFS)) { //Instead of SPIFFS.totalBytes(). Fix https://github.com/espressif/arduino-esp32/issues/9967`
`127`	`127`	`if (_serial_output) {`
`128`	`128`	`Update.printError(Serial);`
`129`	`129`	`}`