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include/cinder/UrlImplWinInet.h

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00001 /*
00002  Copyright (c) 2010, The Cinder Project (http://libcinder.org)
00003  All rights reserved.
00004 
00005  Redistribution and use in source and binary forms, with or without modification, are permitted provided that
00006  the following conditions are met:
00007 
00008     * Redistributions of source code must retain the above copyright notice, this list of conditions and
00009     the following disclaimer.
00010     * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
00011     the following disclaimer in the documentation and/or other materials provided with the distribution.
00012 
00013  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
00014  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
00015  PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
00016  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00017  TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00018  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00019  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
00020  POSSIBILITY OF SUCH DAMAGE.
00021 */
00022 
00023 #pragma once
00024 
00025 #include "cinder/Url.h"
00026 
00027 namespace cinder {
00028 
00029 class IStreamUrlImplWinInet : public IStreamUrlImpl {
00030   public:
00031     IStreamUrlImplWinInet( const std::string &url, const std::string &user, const std::string &password );
00032     ~IStreamUrlImplWinInet();
00033 
00034     virtual size_t      readDataAvailable( void *dest, size_t maxSize );
00035     virtual void        seekAbsolute( off_t absoluteOffset );
00036     virtual void        seekRelative( off_t relativeOffset );
00037     virtual off_t       tell() const;
00038     virtual off_t       size() const;
00039     
00040     virtual bool        isEof() const;
00041     virtual void        IORead( void *t, size_t size );
00042 
00043   private:
00044     int                 bufferDataRemaining() const { return mBufferedBytes - mBufferOffset; }
00045     void                fillBuffer( int wantBytes ) const; 
00046   
00047     shared_ptr<void>        mSession, mConnection, mRequest;
00048     
00049     mutable bool            mIsFinished;
00050     mutable uint8_t         *mBuffer; // todo - consider an exception-safe version of this
00051     mutable int             mBufferSize;
00052     mutable int             mBufferOffset, mBufferedBytes;
00053     mutable off_t           mBufferFileOffset;  // where in the file the buffer starts
00054     static const int        DEFAULT_BUFFER_SIZE = 4096;
00055 };
00056 
00057 } // namespace cinder