httpdownloaddlg.h

HTTP下载程序。类似IE中的下载界面

/*
Module : HTTPDOWNLOADDLG.H
Purpose: Defines the interface for an MFC dialog which performs HTTP downloads
         similiar to the Internet Explorer download dialog

Copyright (c) 1999 - 2000 by PJ Naughter.  
All rights reserved.

*/


////////////////////////////////// Macros ///////////////////////////

#ifndef __HTTPDOWNLOADDLG_H__
#define __HTTPDOWNLOADDLG_H__



/////////////////////////// Classes /////////////////////////////////

class CHttpDownloadDlg : public CDialog
{
public:
//Constructors / Destructors
	CHttpDownloadDlg(CWnd* pParent = NULL);

//Public Member variables
  CString m_sURLToDownload;
  CString m_sFileToDownloadInto;
  CString m_sUserName;
  CString m_sPassword;

protected:
	//{{AFX_DATA(CHttpDownloadDlg)
	enum { IDD = IDD_HTTPDOWNLOAD };
	CStatic	m_ctrlStatus;
	CStatic	m_ctrlTransferRate;
	CStatic	m_ctrlTimeLeft;
	CProgressCtrl	m_ctrlProgress;
	CStatic	m_ctrlFileStatus;
	CAnimateCtrl m_ctrlAnimate;
	//}}AFX_DATA

	//{{AFX_VIRTUAL(CHttpDownloadDlg)
	virtual void DoDataExchange(CDataExchange* pDX);
	//}}AFX_VIRTUAL

	//{{AFX_MSG(CHttpDownloadDlg)
	virtual BOOL OnInitDialog();
	afx_msg void OnDestroy();
	virtual void OnCancel();
	afx_msg void OnClose();
	//}}AFX_MSG
  afx_msg LRESULT OnThreadFinished(WPARAM wParam, LPARAM lParam);

	DECLARE_MESSAGE_MAP()
  DECLARE_DYNAMIC(CHttpDownloadDlg);

  static void CALLBACK _OnStatusCallBack(HINTERNET hInternet, DWORD dwContext, DWORD dwInternetStatus, 
                                        LPVOID lpvStatusInformation, DWORD dwStatusInformationLength);
  void OnStatusCallBack(HINTERNET hInternet, DWORD dwInternetStatus, 
                        LPVOID lpvStatusInformation, DWORD dwStatusInformationLength);
  static UINT _DownloadThread(LPVOID pParam);
  void HandleThreadErrorWithLastError(UINT nIDError, DWORD dwLastError=0);
  void HandleThreadError(UINT nIDError);
  void DownloadThread();
  void SetPercentage(int nPercentage);
  void SetTimeLeft(DWORD dwSecondsLeft, DWORD dwBytesRead, DWORD dwFileSize);
  void SetProgressRange(DWORD dwFileSize);
  void SetStatus(const CString& sCaption);
  void SetStatus(UINT nID);
  void SetStatus(UINT nID, const CString& lpsz1);
  void SetTransferRate(double KbPerSecond);
  void PlayAnimation();
  void SetProgress(DWORD dwBytesRead);
  void UpdateControlsDuringTransfer(DWORD dwStartTicks, DWORD& dwCurrentTicks, DWORD dwTotalBytesRead, DWORD& dwLastTotalBytes, 
                                    DWORD& dwLastPercentage, BOOL bGotFileSize, DWORD dwFileSize);

  CString       m_sError;
  CString       m_sServer; 
  CString       m_sObject; 
  CString       m_sFilename;
  INTERNET_PORT m_nPort;
  DWORD         m_dwServiceType;
  HINTERNET     m_hInternetSession;
  HINTERNET     m_hHttpConnection;
  HINTERNET     m_hHttpFile;
  BOOL          m_bAbort;
  BOOL          m_bSafeToClose;
  CFile         m_FileToWrite;
  CWinThread*   m_pThread;
};


#endif //__HTTPDOWNLOADDLG_H__