169 lines
3.3 KiB
C++
169 lines
3.3 KiB
C++
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/*
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* This file is a part of TTCalc - a mathematical calculator
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* and is distributed under the (new) BSD licence.
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* Author: Tomasz Sowa <t.sowa@ttmath.org>
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*/
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/*
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* Copyright (c) 2006-2009, Tomasz Sowa
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name Tomasz Sowa nor the names of contributors to this
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* project may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "compileconfig.h"
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#include "download.h"
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Download::Download()
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{
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buffer_len = 128;
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progress = 0;
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buffer = new char[buffer_len];
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}
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Download::~Download()
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{
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if( buffer )
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delete [] buffer;
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}
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void Download::SetProgress()
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{
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if( !progress )
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return;
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SendMessage(progress, PBM_SETRANGE32, 0, all_len);
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SendMessage(progress, PBM_SETPOS, 0, 0);
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}
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void Download::ChangeProgress(size_t size)
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{
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if( !progress )
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return;
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SendMessage(progress, PBM_SETPOS, size, 0);
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}
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void Download::ClearProgress()
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{
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if( !progress )
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return;
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SendMessage(progress, PBM_SETPOS, 0, 0);
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}
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bool Download::DownloadLoop(HINTERNET conn)
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{
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DWORD read;
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while( true )
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{
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bool res = InternetReadFile(conn, buffer, buffer_len, &read);
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if( !res )
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// some problems with downloading
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return false;
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if( read > 0 )
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{
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down_size += read;
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ChangeProgress(down_size);
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if( !Read(buffer, read) )
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return false;
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}
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else
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{
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// end
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return true;
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}
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}
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}
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bool Download::DownloadUrl(const char * url)
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{
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bool res = true;
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down_size = 0;
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HINTERNET hint = InternetOpen("TTCalcAutoUpdate",INTERNET_OPEN_TYPE_DIRECT, 0, 0, 0);
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if( !hint )
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return false;
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HINTERNET conn = InternetOpenUrl(hint, url, 0, 0,
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INTERNET_FLAG_DONT_CACHE | INTERNET_FLAG_RELOAD | INTERNET_FLAG_NO_UI, 0);
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if( conn )
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{
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GetLen(conn);
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SetProgress();
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if( Init() )
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{
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res = DownloadLoop(conn);
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Close();
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ClearProgress();
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}
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InternetCloseHandle(conn);
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}
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else
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{
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res = false;
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}
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InternetCloseHandle(hint);
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return res;
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}
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