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