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J. Nick Koston
ba2558edf6
The previous fix tracked the AsyncWebServerRequest pointer to distinguish web_server_idf's double index==0 callbacks (Start marker with data==nullptr, then the first real data chunk) from a retry after an interrupted upload. That is unreliable: AsyncWebServerRequest is a stack-allocated object in the httpd task, so a new request that happens to reuse the same stack address as an interrupted one compares equal and silently skips the abort. Closing a browser tab mid-upload and starting a fresh upload from another window could then concatenate partial data from the first upload with the new image. Gate the init block on 'index == 0 && len > 0' instead. This uniquely identifies the first real byte of an upload on both IDF (start-marker has len==0) and Arduino, no identity tracking needed.
