1、下載文件
Download(const CString& strFileURLInServer, //待下載文件的URL
const CString & strFileLocalFullPath)//存放到本地的路徑
{
?ASSERT(strFileURLInServer != "");
?ASSERT(strFileLocalFullPath != "");
?CInternetSession session;
?CHttpConnection* pHttpConnection = NULL;
?CHttpFile* pHttpFile = NULL;
?CString strServer, strObject;
?INTERNET_PORT wPort;
?DWORD dwType;
?const int nTimeOut = 2000;
?session.SetOption(INTERNET_OPTION_CONNECT_TIMEOUT, nTimeOut);?//重試之間的等待延時
?session.SetOption(INTERNET_OPTION_CONNECT_RETRIES, 1);???//重試次數
?char* pszBuffer = NULL;??
?try
?{
??AfxParseURL(strFileURLInServer, dwType, strServer, strObject, wPort);
??pHttpConnection = session.GetHttpConnection(strServer, wPort);
??pHttpFile = pHttpConnection->OpenRequest(CHttpConnection::HTTP_VERB_GET, strObject);
??if(pHttpFile->SendRequest() == FALSE)
???return false;
??DWORD dwStateCode;
??pHttpFile->QueryInfoStatusCode(dwStateCode);
??if(dwStateCode == HTTP_STATUS_OK)
??{
????HANDLE hFile = CreateFile(strFileLocalFullPath, GENERIC_WRITE,
?????????FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL,
?????????NULL);??//創建本地文件
???if(hFile == INVALID_HANDLE_VALUE)
???{
????pHttpFile->Close();
????pHttpConnection->Close();
????session.Close();
????return false;
???}
?
???char szInfoBuffer[1000];??//返回消息
???DWORD dwFileSize = 0;???//文件長度
???DWORD dwInfoBufferSize = sizeof(szInfoBuffer);
???BOOL bResult = FALSE;
???bResult = pHttpFile->QueryInfo(HTTP_QUERY_CONTENT_LENGTH,
???????????(void*)szInfoBuffer,&dwInfoBufferSize,NULL);
???dwFileSize = atoi(szInfoBuffer);
???const int BUFFER_LENGTH = 1024 * 10;
???pszBuffer = new char[BUFFER_LENGTH];??//讀取文件的緩沖
???DWORD dwWrite, dwTotalWrite;
???dwWrite = dwTotalWrite = 0;
???UINT nRead = pHttpFile->Read(pszBuffer, BUFFER_LENGTH);?//讀取服務器上數據
???while(nRead > 0)
???{
????WriteFile(hFile, pszBuffer, nRead, &dwWrite, NULL);??//寫到本地文件
????dwTotalWrite += dwWrite;
????nRead = pHttpFile->Read(pszBuffer, BUFFER_LENGTH);
???}
???delete[]pszBuffer;
???pszBuffer = NULL;
???CloseHandle(hFile);
??}
??else
??{
???delete[]pszBuffer;
???pszBuffer = NULL;
???if(pHttpFile != NULL)
???{
????pHttpFile->Close();
????delete pHttpFile;
????pHttpFile = NULL;
???}
???if(pHttpConnection != NULL)
???{
????pHttpConnection->Close();
????delete pHttpConnection;
????pHttpConnection = NULL;
???}
???session.Close();
????return false;
??}
?}
?catch(...)
?{
??delete[]pszBuffer;
??pszBuffer = NULL;
??if(pHttpFile != NULL)
??{
???pHttpFile->Close();
???delete pHttpFile;
???pHttpFile = NULL;
??}
??if(pHttpConnection != NULL)
??{
???pHttpConnection->Close();
???delete pHttpConnection;
???pHttpConnection = NULL;
??}
??session.Close();
??return false;
?}
?if(pHttpFile != NULL)
??pHttpFile->Close();
?if(pHttpConnection != NULL)
??pHttpConnection->Close();
?session.Close();
?return true;
}
2、上傳文件
UploadFile(LPCTSTR strURL, //負責接收上傳操作的頁面的URL
LPCTSTR strLocalFileName)? //待上傳的本地文件路徑
{
?ASSERT(strURL != NULL && strLocalFileName != NULL);
?BOOL bResult = FALSE;
?DWORD dwType = 0;
?CString strServer;
?CString strObject;
?INTERNET_PORT wPort = 0;
?DWORD dwFileLength = 0;
?char * pFileBuff = NULL;
?CHttpConnection * pHC = NULL;
?CHttpFile * pHF = NULL;
?CInternetSession cis;
?bResult =? AfxParseURL(strURL, dwType, strServer, strObject, wPort);
?if(!bResult)
??return FALSE;
?CFile file;
?try
?{
??if(!file.Open(strLocalFileName, CFile::shareDenyNone | CFile::modeRead))
???return FALSE;
??dwFileLength = file.GetLength();
??if(dwFileLength <= 0)
???return FALSE;
??pFileBuff = new char[dwFileLength];
??memset(pFileBuff, 0, sizeof(char) * dwFileLength);
??file.Read(pFileBuff, dwFileLength);
??const int nTimeOut = 5000;
??cis.SetOption(INTERNET_OPTION_CONNECT_TIMEOUT, nTimeOut); //聯接超時設置
??cis.SetOption(INTERNET_OPTION_CONNECT_RETRIES, 1);??//重試1次
??pHC = cis.GetHttpConnection(strServer, wPort);??//取得一個Http聯接
??pHF = pHC->OpenRequest(CHttpConnection::HTTP_VERB_POST, strObject);
??if(!pHF->SendRequest(NULL, 0, pFileBuff, dwFileLength))
??{
???delete[]pFileBuff;
???pFileBuff = NULL;
???pHF->Close();
???pHC->Close();
???cis.Close();
???return FALSE;
??}
??DWORD dwStateCode = 0;
??pHF->QueryInfoStatusCode(dwStateCode);
??if(dwStateCode == HTTP_STATUS_OK)
???bResult = TRUE;
?}
?catch(CInternetException * pEx)
?{
??char sz[256] = "";
??pEx->GetErrorMessage(sz, 25);
??CString str;
??str.Format("InternetException occur!\r\n%s", sz);
??AfxMessageBox(str);
?}
?catch(CFileException& fe)
?{
??CString str;
??str.Format("FileException occur!\r\n%d", fe.m_lOsError);
??AfxMessageBox(str);
?}
?catch(...)
?{
??DWORD dwError = GetLastError();
??CString str;
??str.Format("Unknow Exception occur!\r\n%d", dwError);
??AfxMessageBox(str);
?}
?delete[]pFileBuff;
?pFileBuff = NULL;
?file.Close();
?pHF->Close();
?pHC->Close();
?cis.Close();
?return bResult;
}