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//
// DataURIStream.h
//
// Library: Foundation
// Package: Streams
// Module: DataURIStreamFactory
//
// Definition of the DataURIStream class.
//
// Copyright (c) 2019, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#ifndef Foundation_DataURIStream_INCLUDED
#define Foundation_DataURIStream_INCLUDED
#include "Poco/Foundation.h"
#include <istream>
#include <memory>
namespace Poco {
class Base64Decoder;
class MemoryInputStream;
class URI;
class Foundation_API DataURIStreamIOS: public virtual std::ios
/// The base class for DataURIStream.
///
/// This class is needed to ensure the correct initialization
/// order of the stream buffer and base classes.
{
public:
DataURIStreamIOS(const URI& uri);
~DataURIStreamIOS();
std::streambuf* rdbuf();
protected:
std::streambuf* _buf;
private:
DataURIStreamIOS(const DataURIStreamIOS&);
DataURIStreamIOS& operator = (const DataURIStreamIOS&);
std::string _data;
std::unique_ptr<MemoryInputStream> _memoryStream;
std::unique_ptr<Base64Decoder> _base64Decoder;
};
class Foundation_API DataURIStream: public DataURIStreamIOS, public std::istream
/// An input stream for reading data from a data URI.
/// For example, when constructed from "data:text/plain;base64,SGVsbG8sIFdvcmxkIQ%3D%3D" it reads "Hello, World!".
{
public:
DataURIStream(const URI& uri);
/// Creates a DataURIStream for the given data URI,
/// ready for reading data.
/// Throws a DataFormatException exception if the data is incorrect format.
~DataURIStream();
/// Destroys the DataURIStream.
private:
DataURIStream(const DataURIStream&);
DataURIStream& operator = (const DataURIStream&);
};
} // namespace Poco
#endif // Foundation_DataURIStream_INCLUDED
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