Handle stream timeouts properly, for slow HTTP/HTTPS links (#3752)
This patch fixes update timeouts (error #6) on slow HTTP/HTTPS links.
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@ -323,6 +323,8 @@ size_t UpdateClass::write(uint8_t *data, size_t len) {
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size_t UpdateClass::writeStream(Stream &data) {
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size_t written = 0;
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size_t toRead = 0;
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int timeout_failures = 0;
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if(hasError() || !isRunning())
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return 0;
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@ -344,15 +346,24 @@ size_t UpdateClass::writeStream(Stream &data) {
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bytesToRead = remaining();
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}
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/*
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Init read&timeout counters and try to read, if read failed, increase counter,
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wait 100ms and try to read again. If counter > 300 (30 sec), give up/abort
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*/
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toRead = 0;
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timeout_failures = 0;
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while(!toRead) {
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toRead = data.readBytes(_buffer + _bufferLen, bytesToRead);
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if(toRead == 0) { //Timeout
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delay(100);
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toRead = data.readBytes(_buffer + _bufferLen, bytesToRead);
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if(toRead == 0) { //Timeout
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if(toRead == 0) {
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timeout_failures++;
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if (timeout_failures >= 300) {
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_abort(UPDATE_ERROR_STREAM);
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return written;
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}
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delay(100);
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}
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}
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if(_ledPin != -1) {
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digitalWrite(_ledPin, !_ledOn); // Switch LED off
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}
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