HTTP上传和下载文件

HTTP上传和下载文件

在PC机和WCE上均能使用，使用的是MFC的库，已通过测试，记得加头文件#include<afxinet.h>

下载文件：

bool Download( const CString & strFileURLInServer, // 待下载文件的URL const CString & strFileLocalFullPath) // 存放到本地的路径 { 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); //重试之间的等待延时 session.SetOption(INTERNET_OPTION_CONNECT_RETRIES, 1); //重试次数 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); //创建本地文件 if(hFile == INVALID_HANDLE_VALUE) { pHttpFile->Close(); pHttpConnection->Close(); session.Close(); return false; } char szInfoBuffer[1000]; //返回消息 DWORD dwFileSize = 0; //文件长度 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]; //读取文件的缓冲 DWORD dwWrite, dwTotalWrite; dwWrite = dwTotalWrite = 0; UINT nRead = pHttpFile->Read(pszBuffer, BUFFER_LENGTH); //读取服务器上数据 while(nRead > 0) { WriteFile(hFile, pszBuffer, nRead, &dwWrite, NULL); //写到本地文件 dwTotalWrite += dwWrite; nRead = pHttpFile->Read(pszBuffer, BUFFER_LENGTH); } delete[]pszBuffer; pszBuffer = NULL; CloseHandle(hFile); } } catch(CInternetException* e) { TCHAR tszErrString[256]; e->GetErrorMessage(tszErrString, sizeof(tszErrString)); TRACE(_T("Download XSL error! URL: %s,Error: %s"), strFileURLInServer, tszErrString); e->Delete(); } catch(...) { } if(pszBuffer != NULL) { 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 true;}

 

测试代码：

CString URLInServer;CString LocalFullPath;URLInServer = "http://www.163.com/photo";LocalFullPath = "//test.html";Download(URLInServer,LocalFullPath);

 

修改后，代码

 

bool CHttpClient::Download( const string & strFileURLInServer, // 待下载文件的URL const string & strFileLocalFullPath) // 存放到本地的路径 { 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); //重试之间的等待延时 session.SetOption(INTERNET_OPTION_CONNECT_RETRIES, 1); //重试次数 char* pszBuffer = NULL; try { CString tmp; tmp.Format("%s",strFileURLInServer.c_str()); AfxParseURL(tmp, 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) { //CString LocalFullPath; tmp.Format("%s",strFileLocalFullPath.c_str()); HANDLE hFile = CreateFile(tmp, GENERIC_WRITE, FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); //创建本地文件 if(hFile == INVALID_HANDLE_VALUE) { pHttpFile->Close(); pHttpConnection->Close(); session.Close(); return false; } char szInfoBuffer[1000]; //返回消息 DWORD dwFileSize = 0; //文件长度 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]; //读取文件的缓冲 DWORD dwWrite, dwTotalWrite; dwWrite = dwTotalWrite = 0; UINT nRead = pHttpFile->Read(pszBuffer, BUFFER_LENGTH); //读取服务器上数据 while(nRead > 0) { WriteFile(hFile, pszBuffer, nRead, &dwWrite, NULL); //写到本地文件 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(); delete pHttpFile; pHttpFile = NULL; } if(pHttpConnection != NULL) { pHttpConnection->Close(); delete pHttpConnection; pHttpConnection = NULL; } session.Close(); return true;}

 

上传文件：

UploadFile(LPCTSTR strURL, //负责接收上传操作的页面的URLLPCTSTR strLocalFileName) //待上传的本地文件路径{ 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); //联接超时设置 cis.SetOption(INTERNET_OPTION_CONNECT_RETRIES, 1); //重试1次 pHC = cis.GetHttpConnection(strServer, wPort); //取得一个Http联接 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;}