vc 中调用 WebService 中的方法.doc

CString m_strHttp = _T(/TranslateService.asmx);CString m_strObject = _T(/TranslateService.asmx);/本文以调用 /TranslateService.asmx中的 /Translate 方法为例说明如何调用 WebService 中的方法/UTF8编码、解码 .由于 webservice 中返回的默认的数据类型是 utf8 编码格式的，/所以本人将其转换成 Unicode 编码格式,以便于程序查看./编码/Convert(str,936,CP_UTF8);/解码/Convert(str,CP_UTF8,936);/编码、解码函数CString CWebService:Convert(CString strInput, int nSourceCodepage, int nTargetCodepage)int len = strInput.GetLength(); wchar_t* pUnicode = NULL; int unicodeLen = MultiByteToWideChar(nSourceCodepage,0,(const char *)strInput.GetBuffer(0),-1,NULL,0); pUnicode=new wchar_tunicodeLen+1; memset(pUnicode,0,(unicodeLen+1)*sizeof(wchar_t); MultiByteToWideChar(nSourceCodepage,0,(const char *)strInput.GetBuffer(0),-1,(LPWSTR)pUnicode,unicodeLen); BYTE* pTargetData = NULL; int targetLen=WideCharToMultiByte(nTargetCodepage,0,(LPWSTR)pUnicode,-1,(char *)pTargetData,0,NULL,NULL); pTargetData=new BYTEtargetLen+1; memset(pTargetData,0,targetLen+1); WideCharToMultiByte(nTargetCodepage,0,(LPWSTR)pUnicode,-1,(char *)pTargetData,targetLen,NULL,NULL); CString strTarget; strTarget.Format(%s,pTargetData); delete pUnicode; delete pTargetData; return strTarget; DWORD dwHttpRequestFlags =INTERNET_FLAG_EXISTING_CONNECT | INTERNET_FLAG_NO_AUTO_REDIRECT;const TCHAR szHeaders =_T(Accept: text/*rnUser-Agent: MFC_WebSevice_Samplern);/GetWebServiceObject:获取 webservice 方法的返回的数据/strURL 包函了 WebService 的调用地址和方法，以及传递给方法的参数/strObjectType 为 WebService 返回的数据类型,本文是 string （字符串）类型CString CWebService:GetWebServiceObject(CString strURL, CString strObjectType)CString strList;CString strXMLObject;LPCTSTR pszURL = strURL;BOOL bStripMode = FALSE;CHttpFile *pFile = NULL;CInternetSession netSession;CHttpConnection* pServer = NULL;tryCString strServerName;CString strObject;INTERNET_PORT nPort;DWORD dwServiceType;if (!AfxParseURL(pszURL, dwServiceType, strServerName, strObject, nPort) |dwServiceType != INTERNET_SERVICE_HTTP)THROW(1);pServer = netSession.GetHttpConnection(strServerName, nPort);pFile = pServer-OpenRequest(CHttpConnection:HTTP_VERB_GET,strObject, NULL, 1, NULL, NULL, dwHttpRequestFlags);pFile-AddRequestHeaders(szHeaders);pFile-SendRequest();DWORD dwRet;pFile-QueryInfoStatusCode(dwRet);if (dwRet = HTTP_STATUS_DENIED)/需要用户名密码DWORD dwPrompt;dwPrompt = pFile-ErrorDlg(NULL, ERROR_INTERNET_INCORRECT_PASSWORD,FLAGS_ERROR_UI_FLAGS_GENERATE_DATA | FLAGS_ERROR_UI_FLAGS_CHANGE_OPTIONS, NULL);if (dwPrompt != ERROR_INTERNET_FORCE_RETRY)THROW (1);pFile-SendRequest();pFile-QueryInfoStatusCode(dwRet);if (dwRet = HTTP_STATUS_MOVED |dwRet = HTTP_STATUS_REDIRECT |dwRet = HTTP_STATUS_REDIRECT_METHOD)/需要重定向CString strNewLocation;pFile-QueryInfo(HTTP_QUERY_RAW_HEADERS_CRLF, strNewLocation);int nPlace = strNewLocation.Find(_T(Location: );if (nPlace = -1)THROW (2);strNewLocation = strNewLocation.Mid(nPlace + 10);nPlace = strNewLocation.Find(n);if (nPlace 0)strNewLocation = strNewLocation.Left(nPlace);pFile-Close();delete pFile;pServer-Close();delete pServer;/ figure out what the old place wasif (!AfxParseURL(strNewLocation, dwServiceType, strServerName, strObject, nPort)THROW (2);if (dwServiceType != INTERNET_SERVICE_HTTP)THROW (2);/ try again at the new locationpServer = netSession.GetHttpConnection(strServerName, nPort);pFile = pServer-OpenRequest(CHttpConnection:HTTP_VERB_GET,strObject, NULL, 1, NULL, NULL, dwHttpRequestFlags);pFile-AddRequestHeaders(szHeaders);pFile-SendRequest();pFile-QueryInfoStatusCode(dwRet);if (dwRet != HTTP_STATUS_OK)THROW(2);return _T();CString strRead;int nRow = 0;strList.Empty();int nSize = pFile-GetLength();while(pFile-ReadString(strRead)int nNum = strRead.GetLength();strRead = Convert(strRead,CP_UTF8,936);strList += strRead;catch(CInternetException* pEx)TCHAR szErr1024;pEx-GetErrorMessage(szErr, 1024);int nRetCode = 2;pEx-Delete();CString strMsg;strMsg.Format(%s,szErr);CEBookDlg* pEBookWnd = (CEBookDlg*)AfxGetMainWnd();return strMsg;if (pFile != NULL)delete pFile;pFile = NULL;if (pServer != NULL)delete pServer;pServer = NULL;netSession.Close();/将XML对象解析出来int nObj = strList.Find(strObjectType);int nLeft = strList.Find(,nObj);int nRight = strList.Find(,nLeft);strXMLObject = strList.Mid(nLeft + 1,nRight - nLeft - 1);/return strXMLObject;/调用 WebService 中的方法void Translate