关键系统函数
CHttpConnection* CInternetSession::GetHttpConnection
CHttpFile* CHttpConnection::OpenRequest
CHttpFile::SendRequest
CInternetFile::Read
访问接口函数
//strMethod:类型包含 POST/GET ,strUrl访问的网址,strPostData:类型为POST时提交给服务器的数据,strResponse:服务器返回数据
int CHttpData::ExecuteRequest(LPCTSTR strMethod, LPCTSTR strUrl, CString/*LPCTSTR*/ strPostData, CString &strResponse)
{
CString strServer;
CString strObject;
DWORD dwServiceType;
INTERNET_PORT nPort;
strResponse = _T("");
CInternetSession sess;//Create session
AfxParseURL(strUrl, dwServiceType, strServer, strObject, nPort); //解析url
//判断协议类型是否为http或https
if(AFX_INET_SERVICE_HTTP != dwServiceType && AFX_INET_SERVICE_HTTPS != dwServiceType)
{
LoggerCio::notice(LoggerCio::LOG_URL,"*** url 非http或https 协议！");//log输出
return FAILURE;
}
try
{ //CHttpConnection *m_pConnection;//定义在头文件
//获取 CHttpConnection*
m_pConnection = sess.GetHttpConnection(strServer,dwServiceType == AFX_INET_SERVICE_HTTP ? NORMAL_CONNECT : SECURE_CONNECT,nPort);
//获取 CHttpFile*
m_pFile = m_pConnection->OpenRequest(strMethod, strObject,NULL, 1, NULL, NULL,(dwServiceType == AFX_INET_SERVICE_HTTP ? NORMAL_REQUEST : SECURE_REQUEST));
m_pFile -> AddRequestHeaders( _T("Accept:application/json;"));
m_pFile -> AddRequestHeaders( _T("Content-Type:application/json;charset=utf-8;"));
m_pFile -> AddRequestHeaders( _T("Content-Type:multipart/form-data;"));
USES_CONVERSION;
char *pData = T2A(strPostData);
if (NULL == m_pFile){
LOG_FUNC_QUIT_DEBUG(LOG_SYS);
return FAILURE;
}
//发送请求
if(m_pFile->SendRequest(NULL, 0,pData,strlen(pData)))
{
char szChars[BUFFER_SIZE + 1] = {0};
string strRawResponse = "";
UINT nReaded = 0;
while ((nReaded = m_pFile->Read((void*)szChars, BUFFER_SIZE)) > 0)
{//接收返回
szChars[nReaded] = '\0';
strRawResponse += szChars;
memset(szChars, 0, BUFFER_SIZE + 1);
}
//将多字符转宽字节存为 CString
int unicodeLen = MultiByteToWideChar(CP_UTF8, 0, strRawResponse.c_str(), -1, NULL, 0);
WCHAR *pUnicode = new WCHAR[unicodeLen + 1];
memset(pUnicode,0,(unicodeLen+1)*sizeof(wchar_t));
MultiByteToWideChar(CP_UTF8,0,strRawResponse.c_str(),-1, pUnicode,unicodeLen);
CString cs(pUnicode);
delete []pUnicode;
pUnicode = NULL;
strResponse = cs;
}
else{//请求失败打印错误码
DWORD dwError = GetLastError();
LoggerCio::notice(LoggerCio::LOG_URL,"*** m_pFile->SendRequest 失败，GetLastError=%d",dwError);
}
Clear();
}
catch (CInternetException* e)
{ //捕获CInternetException异常
Clear();
DWORD dwErrorCode = e->m_dwError;
e->Delete();
e = NULL;
DWORD dwError = GetLastError();
LoggerCio::notice(LoggerCio::LOG_URL,"*** CHttpData 网络异常，错误代码[CInternetException::m_dwError:%d][GetLastError:%d] ***",dwErrorCode,dwError);
if (ERROR_INTERNET_TIMEOUT == dwErrorCode)
return OUTTIME; //超时
else
return FAILURE; //错误
}
return SUCCESS; //成功
}
调用示例
//我的post数据一般格式，Json库是 JsonCpp
//格式化json串
Json::Value root;
root["id"] = Json::Value(theApp.g_nID);
root["verify"] = Json::Value(CSTR_2_STR(theApp.g_strVerify));
root["check_time"] = Json::Value(theApp.g_nCheckTime);
root["oem"] = Json::Value("");
strPostData= STR_2_CSTR(root.toStyledString());
ExecuteRequest(_T("POST"), strUrl/*请求接口*/, strPostData/*接口所需的参数，这个需要和接口提供方协商，一般是json字串*/, strResponse/*服务器返回的字串*/);
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