我正在通过 eVC++ 为 windows mobile 6 编写应用程序。
我使用以下类将我的数据发送到 Web 服务。
我的问题是当我想发送数据时，首先我必须运行 Internet Explorer，在 GPRS 连接开始后，我可以使用以下类发送数据。
我想知道如何以编程方式启动 GPRS 连接。
我应该在我的代码中添加什么？
谢谢，
// GPRSConnection.cpp: implementation of the GPRSConnection class.
//
//////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "visitor.h"
#include "GPRSConnection.h"
#include <windows.h>
#include <commctrl.h>
#include "connmgr.h"
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
GPRSConnection::GPRSConnection()
{
}
GPRSConnection::~GPRSConnection()
{
}
void GPRSConnection::ThrowHttpException(int nCode)
{
CInternetException* pEx = new CInternetException(nCode);
THROW(pEx);
}
int GPRSConnection::InvokeWebServiceMethod(LPTSTR szAddress, LPTSTR strMethodName,
CArray<WebServiceParameter, WebServiceParameter>& parameters,
CString* DownloadedXML, LPTSTR* Message, LPVOID lpParameter)
{
int nRetCode = 0;
*DownloadedXML = _T("");
DWORD dwAccessType = PRE_CONFIG_INTERNET_ACCESS;
const TCHAR szHeaders[] = _T("Accept: text/*\r\nUser-Agent: MFC_Http_Sample\r\n");
DWORD dwHttpRequestFlags = INTERNET_FLAG_NO_AUTO_REDIRECT;
BOOL bSuccess = TRUE;
CString webAddress = szAddress;
webAddress = webAddress + _T("/") + strMethodName + _T("?");
for(int i=0; i< parameters.GetSize(); i++)
{
webAddress = webAddress + parameters[i].Name + _T("=");
webAddress = webAddress + parameters[i].Value + _T("&");
}
webAddress = webAddress.Left(webAddress.GetLength()-1);
CMyHttpSession session(CString((LPCTSTR)IDS_HTTPAPP), (DWORD)lpParameter, dwAccessType);
CHttpConnection* pServer = NULL;
CHttpFile* pFile = NULL;
TRY
{
// check to see if this is a reasonable URL
CString strServerName;
CString strObject;
INTERNET_PORT nPort;
DWORD dwServiceType;
if (!AfxParseURL(webAddress, dwServiceType, strServerName, strObject, nPort) ||
dwServiceType != INTERNET_SERVICE_HTTP)
{
*Message = _T("Error: can only use URLs beginning with http://");
nRetCode = 100;
ThrowHttpException(kError1);
}
session.EnableStatusCallback(TRUE);
pServer = session.GetHttpConnection(strServerName, nPort);
pFile = pServer->OpenRequest(CHttpConnection::HTTP_VERB_GET, strObject, NULL, (DWORD)lpParameter, NULL, NULL, dwHttpRequestFlags);
pFile->AddRequestHeaders(szHeaders);
pFile->SendRequest();
DWORD dwRet;
pFile->QueryInfoStatusCode(dwRet);
if (dwRet == HTTP_STATUS_DENIED)
{
nRetCode = 100;
*Message = _T("Access to the secured http site is denied!");
// now an error page should be downloaded
}
CString strNewLocation;
pFile->QueryInfo(HTTP_QUERY_RAW_HEADERS_CRLF, strNewLocation);
// were we redirected?
// these response status codes come from WININET.H
if (dwRet == HTTP_STATUS_MOVED ||
dwRet == HTTP_STATUS_REDIRECT ||
dwRet == HTTP_STATUS_REDIRECT_METHOD)
{
CString strNewLocation;
pFile->QueryInfo(HTTP_QUERY_RAW_HEADERS_CRLF, strNewLocation);
int nPlace = strNewLocation.Find(_T("Location: "));
if (nPlace == -1)
{
*Message = _T("Error: Site redirects with no new location");
nRetCode = 100;
ThrowHttpException(kError2);
}
strNewLocation = strNewLocation.Mid(nPlace + 10);
nPlace = strNewLocation.Find('\n');
if (nPlace > 0)
strNewLocation = strNewLocation.Left(nPlace);
// close up the redirected site
pFile->Close();
delete pFile;
pServer->Close();
delete pServer;
// figure out what the old place was
if (!AfxParseURL(strNewLocation, dwServiceType, strServerName, strObject, nPort))
{
*Message = _T("Error: the redirected URL could not be parsed");
nRetCode = 100;
ThrowHttpException(kError2);
}
if (dwServiceType != INTERNET_SERVICE_HTTP)
{
*Message = _T("Error: the redirected URL does not reference a HTTP resource");
nRetCode = 100;
ThrowHttpException(kError2);
}
// try again at the new location
pServer = session.GetHttpConnection(strServerName, nPort);
pFile = pServer->OpenRequest(CHttpConnection::HTTP_VERB_GET,
strObject, NULL, (DWORD)lpParameter, NULL, NULL, dwHttpRequestFlags);
pFile->AddRequestHeaders(szHeaders);
pFile->SendRequest();
pFile->QueryInfoStatusCode(dwRet);
if (dwRet != HTTP_STATUS_OK)
ThrowHttpException(kError2);
}
TCHAR* szWEBPage = new TCHAR[MAX_WEBPAGE_SIZE+1];
if(szWEBPage)
{
szWEBPage[0] = L'\0';
TCHAR* sz = new TCHAR[BUFFER_SIZE+1];
TCHAR* szwBuf = new TCHAR[(BUFFER_SIZE+1)*2];
sz[0] = L'\0';
szwBuf[0] = L'\0';
int n = 0;
pFile->SetReadBufferSize(BUFFER_SIZE*2);
while (pFile->ReadString(sz, BUFFER_SIZE))
{
//-----------------------------
/*
CString print;
//print.Format(_T("%d "), szwBuf[124]);
int adad = (int)sz[0];
print.Format(_T("%d"), adad );
//print.SetAt(0, sz[62]);
MsgBox( NULL, print, B_OK, I_INFORMATION );
//MsgBox( NULL, str, B_OK, I_INFORMATION );
*/
//-----------------------------
wce_AsciiToWide(szwBuf, (const char*)sz);
n += _tcslen(szwBuf);
if(n >= MAX_WEBPAGE_SIZE)
break;
_tcscat(szWEBPage, szwBuf);
}
delete [] sz;
delete [] szwBuf;
//SetDlgItemText(IDC_EDIT1, szWEBPage);
*DownloadedXML = szWEBPage;
}
/*
CString aaa;
aaa.Format( _T("%d"), (*DownloadedXML).GetLength());
MsgBox( NULL, aaa, B_OK, I_INFORMATION );
*/
delete [] szWEBPage;
pFile->Close();
pServer->Close();
}
CATCH (CInternetException, pEx)
{
// catch things wrong with parameters, etc
if (pEx->m_dwError < kErrorMin)
{
TCHAR szError[MAX_PATH]=TEXT("\0");
pEx->GetErrorMessage(szError,MAX_PATH,NULL);
//SetDlgItemText(IDC_EDIT_PAGE, szError);
nRetCode = 100;
CString err = szError;
*Message = err.GetBuffer(0);
}
bSuccess = FALSE;
}
AND_CATCH (CMemoryException, pMemory)
{
// catch things wrong with memory
//SetDlgItemText(IDC_EDIT_PAGE,CString((LPCTSTR)IDS_MEMORYEXCEPTION));
*Message = _T("Not enough memory to download http page");
nRetCode = 100;
pMemory->Delete();
bSuccess = FALSE;
}
END_CATCH_ALL
if (pFile != NULL)
delete pFile;
if (pServer != NULL)
delete pServer;
session.Close();
if(bSuccess)
{
*Message = _T("Completed successfully!");
}
return nRetCode;
}
/////////////////////////////////////////////////////////////////////////////
// CHttpSession object
// Http wants to use its own derivative of the CHttpSession class
// just so it can implement an OnStatusCallback() override.
CMyHttpSession::CMyHttpSession(LPCTSTR pszAppName, DWORD dwContext, int nMethod)
: CInternetSession(pszAppName, dwContext, nMethod)
{
}
void CMyHttpSession::OnStatusCallback(DWORD dwContext, DWORD dwInternetStatus,
LPVOID /* lpvStatusInfomration */, DWORD /* dwStatusInformationLen */)
{
//CMainPage* pDlg = (CMainPage*)dwContext;
//if(!pDlg)
return;
/*
switch(dwInternetStatus)
{
case INTERNET_STATUS_RESOLVING_NAME:
pDlg->SetDlgItemText(IDC_MESSAGE, CString((LPCTSTR)IDS_IPLOOKING));
break;
case INTERNET_STATUS_NAME_RESOLVED:
pDlg->SetDlgItemText(IDC_MESSAGE, CString((LPCTSTR)IDS_IPFOUND));
break;
case INTERNET_STATUS_CONNECTING_TO_SERVER:
pDlg->SetDlgItemText(IDC_MESSAGE, CString((LPCTSTR)IDS_CONNECTING));
break;
case INTERNET_STATUS_CONNECTED_TO_SERVER:
pDlg->SetDlgItemText(IDC_MESSAGE, CString((LPCTSTR)IDS_CONNECTED));
break;
case INTERNET_STATUS_SENDING_REQUEST:
pDlg->SetDlgItemText(IDC_MESSAGE, CString((LPCTSTR)IDS_REQUEST));
break;
case INTERNET_STATUS_REQUEST_SENT:
pDlg->SetDlgItemText(IDC_MESSAGE, CString((LPCTSTR)IDS_SENT));
break;
case INTERNET_STATUS_RECEIVING_RESPONSE:
pDlg->SetDlgItemText(IDC_MESSAGE, CString((LPCTSTR)IDS_WAITING));
break;
case INTERNET_STATUS_RESPONSE_RECEIVED:
pDlg->SetDlgItemText(IDC_MESSAGE, CString((LPCTSTR)IDS_RECEIVED));
break;
case INTERNET_STATUS_CLOSING_CONNECTION:
pDlg->SetDlgItemText(IDC_MESSAGE, CString((LPCTSTR)IDS_CLOSING));
break;
case INTERNET_STATUS_CONNECTION_CLOSED:
pDlg->SetDlgItemText(IDC_MESSAGE, CString((LPCTSTR)IDS_CLOSED));
break;
case INTERNET_STATUS_HANDLE_CREATED:
pDlg->SetDlgItemText(IDC_MESSAGE, CString((LPCTSTR)IDS_CONNECTED2));
break;
case INTERNET_STATUS_HANDLE_CLOSING:
pDlg->SetDlgItemText(IDC_MESSAGE, CString((LPCTSTR)IDS_DISCONNECTED));
break;
case INTERNET_STATUS_REQUEST_COMPLETE:
pDlg->SetDlgItemText(IDC_MESSAGE, CString((LPCTSTR)IDS_COMPLETED));
break;
case INTERNET_STATUS_REDIRECT:
pDlg->SetDlgItemText(IDC_MESSAGE, CString((LPCTSTR)IDS_REDIRECTED));
break;
}
*/
}