Spring WebFlux Filepart DataBuffer cant read more than 108 lines

Question

After downloading the file through the controller, an error occurs in the service. There are 122 lines in the file, but it only reads 108. Has anyone encountered such a problem?

Debug vars

109 line

Fileparser code

Answer 1

In this method, the filePartFlux is directly passed from the controller layer. Then we flat map filePartFlux and get a new Flux stream. It may help you by using this code you can upload any file and get a string

filePartFlux.flatMap(filePart ->
    filePart.content().map(dataBuffer -> {
        byte[] bytes = new byte[dataBuffer.readableByteCount()];
        dataBuffer.read(bytes);
        DataBufferUtils.release(dataBuffer);
        return new String(bytes, StandardCharsets.UTF_8);
    }))