www.gusucode.com > VC HTTP多线程与断点续传下载示例源码程序 > VC HTTP多线程与断点续传下载示例源码程序/code/DownloadDlg.cpp
// DownloadDlg.cpp : implementation file // #include "stdafx.h" #include "Download.h" #include "DownloadDlg.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CAboutDlg dialog used for App About class CAboutDlg : public CDialog { public: CAboutDlg(); // Dialog Data //{{AFX_DATA(CAboutDlg) enum { IDD = IDD_ABOUTBOX }; //}}AFX_DATA // ClassWizard generated virtual function overrides //{{AFX_VIRTUAL(CAboutDlg) protected: virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support //}}AFX_VIRTUAL // Implementation protected: //{{AFX_MSG(CAboutDlg) //}}AFX_MSG DECLARE_MESSAGE_MAP() }; CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) { //{{AFX_DATA_INIT(CAboutDlg) //}}AFX_DATA_INIT } void CAboutDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CAboutDlg) //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) //{{AFX_MSG_MAP(CAboutDlg) // No message handlers //}}AFX_MSG_MAP END_MESSAGE_MAP() DWORD WINAPI DownloadThread(LPVOID); DWORD WINAPI Notify(LPVOID); ///////////////////////////////////////////////////////////////////////////// // CDownloadDlg dialog CDownloadDlg::CDownloadDlg(CWnd* pParent /*=NULL*/) : CDialog(CDownloadDlg::IDD, pParent) { //{{AFX_DATA_INIT(CDownloadDlg) // NOTE: the ClassWizard will add member initialization here //}}AFX_DATA_INIT // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); m_bFinished = FALSE; } void CDownloadDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CDownloadDlg) // NOTE: the ClassWizard will add DDX and DDV calls here //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(CDownloadDlg, CDialog) //{{AFX_MSG_MAP(CDownloadDlg) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_WM_CREATE() ON_BN_CLICKED(IDC_START, OnStart) ON_WM_DESTROY() ON_BN_CLICKED(IDC_CANCEL, OnCancel) //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CDownloadDlg message handlers BOOL CDownloadDlg::OnInitDialog() { CDialog::OnInitDialog(); // Add "About..." menu item to system menu. // IDM_ABOUTBOX must be in the system command range. ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); ASSERT(IDM_ABOUTBOX < 0xF000); CMenu* pSysMenu = GetSystemMenu(FALSE); if (pSysMenu != NULL) { CString strAboutMenu; strAboutMenu.LoadString(IDS_ABOUTBOX); if (!strAboutMenu.IsEmpty()) { pSysMenu->AppendMenu(MF_SEPARATOR); pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); } } // Set the icon for this dialog. The framework does this automatically // when the application's main window is not a dialog SetIcon(m_hIcon, TRUE); // Set big icon SetIcon(m_hIcon, FALSE); // Set small icon CRect rect; GetWindowRect(&rect); SetWindowPos(&wndTopMost, rect.left, rect.top, rect.Width(), rect.Height(), SWP_NOMOVE); for(int i = 0; i < 4; i++){ m_hThread[i] = NULL; } return TRUE; // return TRUE unless you set the focus to a control } void CDownloadDlg::OnSysCommand(UINT nID, LPARAM lParam) { if ((nID & 0xFFF0) == IDM_ABOUTBOX) { CAboutDlg dlgAbout; dlgAbout.DoModal(); } else { CDialog::OnSysCommand(nID, lParam); } } // If you add a minimize button to your dialog, you will need the code below // to draw the icon. For MFC applications using the document/view model, // this is automatically done for you by the framework. void CDownloadDlg::OnPaint() { if (IsIconic()) { CPaintDC dc(this); // device context for painting SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); // Center icon in client rectangle int cxIcon = GetSystemMetrics(SM_CXICON); int cyIcon = GetSystemMetrics(SM_CYICON); CRect rect; GetClientRect(&rect); int x = (rect.Width() - cxIcon + 1) / 2; int y = (rect.Height() - cyIcon + 1) / 2; // Draw the icon dc.DrawIcon(x, y, m_hIcon); } else { CDialog::OnPaint(); } } // The system calls this to obtain the cursor to display while the user drags // the minimized window. HCURSOR CDownloadDlg::OnQueryDragIcon() { return (HCURSOR) m_hIcon; } int CDownloadDlg::OnCreate(LPCREATESTRUCT lpCreateStruct) { if (CDialog::OnCreate(lpCreateStruct) == -1) return -1; m_ctrGetList.Create( LVS_REPORT | WS_VISIBLE | WS_CHILD | WS_BORDER, CRect( 10, 10 , 260, 125), this, IDC_GET_LIST); m_ctrGetList.SetTextColor(RGB(0,0,0)); m_ctrGetList.SetTextBkColor(RGB(220,235,220)); m_ctrGetList.SetBkColor(RGB(220,235,220)); // List Control Header Initializing. LV_COLUMN Lvc; Lvc.mask = LVCF_FMT | LVCF_WIDTH | LVCF_TEXT | LVCF_SUBITEM; Lvc.fmt = LVCFMT_LEFT; // First Column. Lvc.pszText = (LPTSTR)(LPCSTR)"Internet Link"; Lvc.cx = 500; Lvc.iSubItem = 0; m_ctrGetList.InsertColumn(0, &Lvc); // Set Extended style. m_ctrGetList.SetExtendedStyle( LVS_EX_ONECLICKACTIVATE | LVS_EX_FULLROWSELECT | LVS_EX_UNDERLINEHOT | LVS_EX_INFOTIP | LVS_EX_FLATSB | LVS_EX_GRIDLINES | LVS_EX_CHECKBOXES ); return 0; } void CDownloadDlg::OnStart() { char s[1024]; m_ctrGetList.GetItemText(0, 0, s, 1024); CString str;//("http://localhost/test/siguo.exe"); str.Format(s); int ndx = str.ReverseFind('/'); if(ndx == -1){ AfxMessageBox("Error URL"); return; } CString temp = str.Mid(ndx + 1); m_localfile.Empty(); CFileDialog dlg(FALSE, NULL, temp); if(dlg.DoModal() == IDOK){ m_localfile = dlg.m_ofn.lpstrFile; ndx = m_localfile.ReverseFind('\\'); if(ndx == -1){ AfxMessageBox("Error URL"); return; } m_localfile = m_localfile.Left(ndx + 1); m_localfile +=temp; http.StartTask(str, m_localfile); CreateThread(); } } void CDownloadDlg::CreateThread() { if(http.m_bSupportResume){ TRACE("We will create four thread to download!\n"); DWORD dwThread; http.m_index = 0; for(int i = 0; i < 4; i++){ http.m_bTerminate[i] = FALSE; m_hThread[i] = ::CreateThread(NULL, 0, DownloadThread, (LPVOID)&http, 0, &dwThread); if(m_hThread[i] == NULL){ TRACE("Create Thread Error!\n"); return; } } } else{ TRACE("We will create only one thread to download!\n"); DWORD dwThread; http.m_index = 0; http.m_bTerminate[0] = FALSE; m_hThread[0] = ::CreateThread(NULL, 0, DownloadThread, (LPVOID)&http, 0, &dwThread); if(m_hThread[0] == NULL){ TRACE("Create Thread Error!\n"); return; } } DWORD dwNotify; m_hNotify = ::CreateThread(NULL, 0, Notify, (LPVOID)this, 0, &dwNotify); if(m_hNotify == NULL){ TRACE("Create Thread Error!\n"); return; } } void CDownloadDlg::OnDestroy() { CDialog::OnDestroy(); for(int i = 0; i < 4; i++){ if(m_hThread[i] != NULL){ CloseHandle(m_hThread[i]); m_hThread[i] = NULL; } } } DWORD CDownloadDlg::Finish() { char* lpData = NULL; if(http.m_bSupportResume){ HRESULT ret = WaitForMultipleObjects(4, m_hThread, TRUE, INFINITE); if(http.m_bTerminate[0]){ return -1; } if(ret == 0){ m_bFinished = TRUE; AfxMessageBox("Download OK!\n"); CFile file, t[4]; CString name; file.Open(m_localfile, CFile::modeCreate | CFile::modeWrite); for(int i = 0; i < 4; i++){ name.Empty(); name.Format(".down%d", i); name = m_localfile + name; t[i].Open(name, CFile::modeRead); DWORD len = t[i].GetLength(); if(lpData){ delete [] lpData; lpData = NULL; } if(lpData == NULL){ lpData = new char[len]; } t[i].Read(lpData, len); file.Write(lpData, len); t[i].Close(); DeleteFile(name); } if(lpData){ delete [] lpData; lpData = NULL; } file.Close(); name.Empty(); name = m_localfile + ".down"; DeleteFile(name); } } else{ HRESULT ret = WaitForSingleObject(m_hNotify, INFINITE); if(http.m_bTerminate[0]){ return -1; } if(ret == 0){ m_bFinished = TRUE; AfxMessageBox("Download OK!\n"); CFile file, t; CString name; file.Open(m_localfile, CFile::modeCreate | CFile::modeWrite); name = m_localfile + ".down0"; t.Open(name, CFile::modeRead); DWORD len = t.GetLength(); if(lpData){ delete [] lpData; lpData = NULL; } if(lpData == NULL){ lpData = new char[len]; } t.Read(lpData, len); file.Write(lpData, len); t.Close(); DeleteFile(name); if(lpData){ delete [] lpData; lpData = NULL; } file.Close(); } } if(lpData){ delete [] lpData; lpData = NULL; } return 0; } DWORD WINAPI DownloadThread(LPVOID lpParam) { CHTTPDownload* pThis = (CHTTPDownload*)lpParam; int index; index = pThis->m_index; InterlockedIncrement(&pThis->m_index); int ret = pThis->ThreadFunc(index); TRACE("Thread %d has successfully finsihed!%d\n", index, ret); return 0L; } DWORD WINAPI Notify(LPVOID lpParam) { CDownloadDlg* pThis = (CDownloadDlg*)lpParam; return pThis->Finish(); } void CDownloadDlg::OnCancel() { for(int i = 0; i < 4; i++) http.m_bTerminate[i] = TRUE; HRESULT ret = WaitForSingleObject(m_hNotify, INFINITE); if(ret != WAIT_OBJECT_0) return; if(m_bFinished) return; FILE* fp = NULL; CString name; name = m_localfile + ".down"; if((fp = fopen(name, "w+")) == NULL){ TRACE("Create Down file Error!\n"); return ; } CString str = http.m_state.url + "\r\n"; fputs(str, fp); str.Empty(); str = http.m_state.localfile + "\r\n"; fputs(str, fp); str.Empty(); fwrite(&http.m_state.length, sizeof(LONG), 1, fp); fwrite(&http.m_state.time, sizeof(CTime), 1, fp); fwrite(http.m_state.range, sizeof(LONG), 8, fp); fclose(fp); }