// testDlg.cpp : implementation file
//

#include "stdafx.h"
#include "test.h"
#include "testDlg.h"
#include <afxinet.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()

/////////////////////////////////////////////////////////////////////////////
// CTestDlg dialog

CTestDlg::CTestDlg(CWnd* pParent /*=NULL*/)
: CDialog(CTestDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CTestDlg)
	// 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);
}

void CTestDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CTestDlg)
	// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CTestDlg, CDialog)
//{{AFX_MSG_MAP(CTestDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_WHERE, OnWhere)
ON_BN_CLICKED(IDC_START, OnStart)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTestDlg message handlers

BOOL CTestDlg::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
	
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CTestDlg::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 CTestDlg::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 CTestDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CTestDlg::OnWhere() 
{
	// TODO: Add your control notification handler code here
	GetDlgItemText(IDC_URL,url);
	if(url=="")
	{
		AfxMessageBox("请填入URL地址");
		return;
	}
	//下面得到文件类型，即.后面的字符
	CString aboutfile="";
	int len = url.GetLength();
	for(int i=len-1;url[i] != '.';i--)
		aboutfile.Insert(0,url[i]);
	CString strFileName,strFilePath;
	CString m_szDir = "c:\\";
	char BASED_CODE szFilter[] = "All Files (*.*)|*.*||";         
	CFileDialog OpenDlg(false, NULL, NULL, /*OFN_ALLOWMULTISELECT |*/ OFN_EXPLORER, szFilter);         
	OpenDlg.m_ofn.lStructSize = sizeof(OpenDlg.m_ofn);         
	OpenDlg.m_ofn.hwndOwner = NULL;         
	OpenDlg.m_ofn.lpstrTitle = "保存目标文件";         
	OpenDlg.m_ofn.lpstrInitialDir=m_szDir;       //初始目录   
	if( OpenDlg.DoModal() == IDOK)         
	{  
		strFilePath = OpenDlg.GetPathName();
	}
	savefilename=strFilePath+"."+aboutfile;
	SetDlgItemText(IDC_PATH,savefilename);
}

void CTestDlg::OnStart() 
{
	// TODO: Add your control notification handler code here
	CInternetSession	aInternetSession;		//一个会话
	CHttpConnection*	pHttpConnection = NULL;	//链接
	CHttpFile*			pHttpFile = NULL;
	const TCHAR szHeaders[] = _T("Accept: */*\r\nUser-Agent:  Mozilla/4.0 (compatible; MSIE 5.00; Windows 98)\r\n");	//协议
	DWORD				dwFileStatus;
	BYTE				szBuffer[1024];
	DWORD				nLen;
	CFile				aFile;
	DWORD				nSuccess = -1;
	CString				strServer;
	INTERNET_PORT		nPort;
	CString				dwServiceType;
	DWORD				strObject;
	DWORD				dwDownloadSize = 0;
	CString				strLogs;
	
	//分解URL
	if(AfxParseURL(url, dwServiceType, strServer, strObject, nPort))
	{
		//如果服务类型不是HTTP下载
		if(dwServiceType != AFX_INET_SERVICE_HTTP && dwServiceType != AFX_INET_SERVICE_HTTPS)
		{
			return;
		}
	}
	while(pHttpConnection == NULL)
		pHttpConnection = aInternetSession.GetHttpConnection(strServer, nPort);
	if(pHttpConnection != NULL)	
	{
		//取得HttpFile对象
		pHttpFile = pHttpConnection->OpenRequest(CHttpConnection::HTTP_VERB_GET,
												strObject,
												NULL,
												1,
												NULL,
												NULL,
												INTERNET_FLAG_RELOAD | INTERNET_FLAG_DONT_CACHE);
		if(pHttpFile != NULL)
			if(pHttpFile->AddRequestHeaders(szHeaders))
			{
				if(pHttpFile->SendRequest())	//发送文件请求
				{	
					if(pHttpFile->QueryInfoStatusCode(dwFileStatus))//查询文件状态
					{					
						if ((dwFileStatus/100)*100 == HTTP_STATUS_OK)//如果文件状态正常
						{
							if(aFile.Open(savefilename, CFile::modeCreate | CFile::modeWrite | CFile::typeBinary))	//打开文件
							{
								DWORD dwFileLen;
								DWORD dwWordSize = sizeof(dwFileLen);
								pHttpFile->QueryInfo(HTTP_QUERY_FLAG_NUMBER|HTTP_QUERY_CONTENT_LENGTH,&dwFileLen,&dwWordSize,NULL);
								nLen = pHttpFile->Read(szBuffer, 1024);//接收数据
								while(nLen >= 1024)//接收文件数据每次接收一个块
								{
									if(nLen > 0)//如果接收到数据
										aFile.Write(szBuffer, nLen);	//写入文件
									nLen = pHttpFile->Read(szBuffer, 1024);//接收一个块的数据
								}
								if(nLen > 0)//如果接收到数据
								{
									aFile.Write(szBuffer, nLen);//写入文件
									dwDownloadSize += nLen;
								}
								aFile.Close();//关闭文件
								nSuccess = 0;//设置成功标志
								AfxMessageBox("下载完成");
							}
						}
					}
				}
				delete pHttpFile;
			}
			delete pHttpConnection;//删除http连接对象
	}
	aInternetSession.Close();//关闭http连接
	
}