FtpDataRetrieve.h

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/****
 * Sming Framework Project - Open Source framework for high efficiency native ESP8266 development.
 * Created 2015 by Skurydin Alexey
 * http://github.com/SmingHub/Sming
 * All files of the Sming Core are provided under the LGPL v3 license.
 *
 * FtpDataRetrieve.h
 *
 ****/

#pragma once

#include "FtpDataStream.h"
#include "FileSystem.h"

class FtpDataRetrieve : public FtpDataStream
{
public:
    FtpDataRetrieve(FtpServerConnection& connection, const String& fileName)
        : FtpDataStream(connection), file(fileOpen(fileName, File::ReadOnly))
    {
    }

    ~FtpDataRetrieve()
    {
        fileClose(file);
    }

    void transferData(TcpConnectionEvent sourceEvent) override
    {
        if(completed) {
            return;
        }
        char buf[1024];
        int len = fileRead(file, buf, sizeof(buf));
        write(buf, len, TCP_WRITE_FLAG_COPY);
        if(fileIsEOF(file)) {
            completed = true;
            finishTransfer();
        }
    }

private:
    file_t file;
};