Win32 下 如何发送Http请求

第一：

如果是MFC的应用可以使用MFC的封装类库：

     #include <afxinet.h>

       #pragma comment(lib, "wininet.lib")

BOOL PostXmlToUrl(string &address)
{ 
CInternetSession m_winet(NULL,1,INTERNET_OPEN_TYPE_DIRECT,NULL,NULL,0); 
CHttpConnection *pConnection = NULL;
CHttpFile *pFile = NULL;
pConnection = m_winet.GetHttpConnection(address.c_str());
CString strResponse = ""; 


CString strDataSend;
strDataSend .Append("<?xml  version=\"1.0\"  encoding=\"utf-8\"?>\n");
strDataSend.Append("<QuickStart>\n");
strDataSend.Append("  <Device>\n");
strDataSend.Append("    <Request>\n");
strDataSend.Append("      <Diag>\n");
strDataSend.Append("        <Adsu>Diag</Adsu>\n");
strDataSend.Append("      </Diag>\n");
strDataSend.Append("    </Request>\n");
strDataSend.Append("  </Device>\n");
strDataSend.Append("</QuickStart>\n");


try
{
pFile=pConnection->OpenRequest(CHttpConnection::HTTP_VERB_POST,
"/vodafoneapi/process.cgi");


pFile->AddRequestHeaders("Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
pFile->AddRequestHeaders("User-Agent: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/14.0.835.186 Safari/535.1");
pFile->AddRequestHeaders("Content-Type: application/x-www-form-urlencoded");
if (pFile->SendRequest(NULL, 0, (LPVOID)(LPCTSTR)strDataSend, strDataSend.GetLength()) == FALSE)
{
pFile->Close();
delete pFile;
pConnection->Close();
delete pConnection;
m_winet.Close();


return FALSE;
}


DWORD dwStatusCode = 0;
pFile->QueryInfoStatusCode(dwStatusCode);
if (dwStatusCode != 200)
{
pFile->Close();
delete pFile;
pConnection->Close();
delete pConnection;
m_winet.Close();


return FALSE;
}


/*char szRead[1024] = {0};
while((pFile->Read(szRead,1023)) > 0)
{
strResponse += szRead;
}*/
}
catch (CMemoryException* e)
{
pFile->Close();
delete pFile;
pConnection->Close();
delete pConnection;
m_winet.Close();


e->Delete();
return FALSE;
}
catch (CFileException* e)
{
pFile->Close();
delete pFile;
pConnection->Close();
delete pConnection;
m_winet.Close();


e->Delete();
return FALSE;
}
catch (CException* e)
{
pFile->Close();
delete pFile;
pConnection->Close();
delete pConnection;
m_winet.Close();
e->Delete();
return FALSE;
}


pFile->Close();
delete pFile;
pConnection->Close();
delete pConnection;
m_winet.Close();


return TRUE;
}

第二：如果是标准的Win32程序

#include <WinINet.h>
#pragma comment(lib, "Wininet.lib")

BOOL PostDisConnectRequest()
{
string strIpAddr("");
string strGetWay("");
char pInfo[MAX_PATH] = {0};

DWORD dwRet = GetCurtAdapterIndex(pInfo, strIpAddr, strGetWay);


if(dwRet==-1 || strGetWay.empty() || strGetWay.compare(_T("0.0.0.0"))==0) 
{
return FALSE;
}


string strTail = "/vodafoneapi/process.cgi";


string strDataSend;
strDataSend += "<?xml  version=\"1.0\"  encoding=\"utf-8\"?>\n";
strDataSend += "<QuickStart>\n";
strDataSend += "  <Device>\n";
strDataSend += "    <Request>\n";
strDataSend += "      <Diag>\n";
strDataSend += "        <Adsu>Diag</Adsu>\n";
strDataSend += "      </Diag>\n";
strDataSend += "    </Request>\n";
strDataSend += "  </Device>\n";
strDataSend += "</QuickStart>\n";


HINTERNET hSession = InternetOpen(
"",              // 1 LPCTSTR lpszCallerName
INTERNET_OPEN_TYPE_PRECONFIG,   // 2 DWORD dwAccessType
"",                           // 3 LPCTSTR lpszProxyName
0, // 4 INTERNET_PORT nProxyPort
0                             // 5 DWORD dwFlags
) ;


if(!hSession)
{
JRD_LOG("Failed to open session. \r\n");
return FALSE;
}
HINTERNET hConnect = InternetConnect(hSession, strGetWay.c_str(), INTERNET_DEFAULT_HTTP_PORT,
NULL, NULL, INTERNET_SERVICE_HTTP,NULL, NULL);
if (!hConnect)
{
JRD_LOG( "Failed to connect. \r\n");
InternetCloseHandle(hSession);
return FALSE;
}


HINTERNET hRequest = HttpOpenRequest(hConnect, "POST", strTail.c_str(),
HTTP_VERSION, NULL, NULL, INTERNET_FLAG_DONT_CACHE, 0);
if (!hRequest)
{
JRD_LOG( "Failed to open request handle. \r\n");
InternetCloseHandle(hConnect);
InternetCloseHandle(hSession);
return FALSE;
}


string sHeader = "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
HttpAddRequestHeaders(hRequest, sHeader.c_str(),  -1, HTTP_ADDREQ_FLAG_REPLACE | HTTP_ADDREQ_FLAG_ADD);
sHeader = "User-Agent: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/14.0.835.186 Safari/535.1";
HttpAddRequestHeaders(hRequest, sHeader.c_str(),  -1, HTTP_ADDREQ_FLAG_REPLACE | HTTP_ADDREQ_FLAG_ADD);
sHeader = "Content-Type: application/x-www-form-urlencoded";
HttpAddRequestHeaders(hRequest, sHeader.c_str(),  -1, HTTP_ADDREQ_FLAG_REPLACE | HTTP_ADDREQ_FLAG_ADD);


if(!HttpSendRequest(hRequest, NULL, 0, (LPVOID)strDataSend.c_str(), strlen(strDataSend.c_str())))
{
JRD_LOG("Failed to Send Request. \r\n");
InternetCloseHandle(hRequest);
InternetCloseHandle(hConnect);
InternetCloseHandle(hSession);
return FALSE;
}


InternetCloseHandle(hRequest);
InternetCloseHandle(hConnect);
InternetCloseHandle(hSession);


JRD_LOG( "Finished. \r\n");
return TRUE;


}

DWORD GetCurtAdapterIndex(const char* pAdapterName, string& strIpAddr, string& strGateway)
{
    if (pAdapterName == NULL)
    {
        return -1;
    }


    DWORD dwIndex = -1;
    ULONG ulOutBufLen = 0;
    DWORD dwRet = GetAdaptersInfo(NULL, &ulOutBufLen);


    if (dwRet == ERROR_BUFFER_OVERFLOW)
    {
        PIP_ADAPTER_INFO pAdapterInfo = reinterpret_cast<PIP_ADAPTER_INFO>(new BYTE[ulOutBufLen]);   
        dwRet = GetAdaptersInfo(pAdapterInfo, &ulOutBufLen);   


        if (dwRet == ERROR_SUCCESS)
        {
            PIP_ADAPTER_INFO pAdapter = pAdapterInfo;   


            while (pAdapter != NULL)
            {
                if (_strnicmp(pAdapter->Description, pAdapterName, strlen(pAdapterName)) == 0)
                {
                    dwIndex = pAdapter->Index;
                    strIpAddr = pAdapter->IpAddressList.IpAddress.String;
 strGateway = pAdapter->GatewayList.IpAddress.String;//add by hao.liu 2013-8-14
                    JRD_LOG("Interface description==> %s, IP addr ==> %s, IP Getway ==> %s\r\n", pAdapter->Description, pAdapter->IpAddressList.IpAddress.String, strGateway);


                    break;
                }


                pAdapter = pAdapter->Next; 
            }
        }


        delete pAdapterInfo;
    }


    return dwIndex;
}

//该函数用来获取网卡的参数