/**
* @file HTTPClient.cpp
* @brief implementation of the HTTP client class
* @author Mohamed Amine Mzoughi <mohamed-amine.mzoughi@laposte.net>
*/
#include "StdAfx.h"
#include "HTTPClient.h"
#include "json/json.h"
#if defined(_MSC_VER)
#else
#include "toolkit.h"
#include <winpr/string.h>
#endif //_MSC_VER
#include "charset.h"

#define DEBUG_LOG(msg)	\
      do {	\
          if (m_eSettingsFlags & ENABLE_LOG)	\
              m_oLog(msg);	\
      } while (false)


///*TODO(80374374@3/9/2023):  */
GetTokenCallBack g_tokenCall = NULL;


#ifndef _WIN32
static toolkit_once_t once4curl = TOOLKIT_ONCE_INIT;

class CLibCurlLifeManage
{
public:
	CLibCurlLifeManage() :bInited(false) {}
	void Init()
	{
		if (!bInited) {
			curl_global_init(CURL_GLOBAL_ALL);
			bInited = true;
		}
	}
	~CLibCurlLifeManage()
	{
		if (bInited) {
			curl_global_cleanup();
			bInited = false;
		}
	}

private:
	bool bInited;
};

static CLibCurlLifeManage gLibcurlMnt;

static void init_libcurl_once(void)
{
	gLibcurlMnt.Init();
}


static std::string GBK2UTF8(const std::string str)
{
	std::string result("");
	if (str.empty())
		return result;

	if (toolkit_detect_utf8_str(str.c_str())) {
		result = str;
	} else {
		auto ret = toolkit_gbk2utf8((char*)str.c_str(), str.length(), NULL, 0);
		if (ret <= 0)
			return result;
		char* arr = new char[ret];
		ret = toolkit_gbk2utf8((char*)str.c_str(), str.length(), arr, ret);
		if (ret > 0) {
			result = arr;
		}
		delete[] arr;
	}

	return result;
}

static std::string UTF8ToGBK(const std::string str)
{
	std::string result("");
	if (str.empty())
		return result;

	if (!toolkit_detect_utf8_str(str.c_str())) {
		result = str;
	} else {
		auto ret = toolkit_utf82gbk((char*)str.c_str(), str.length(), NULL, 0);
		if (ret <= 0)
			return result;
		char* arr = new char[ret];
		ret = toolkit_utf82gbk((char*)str.c_str(), str.length(), arr, ret);
		if (ret > 0) {
			result = arr;
		}
		delete[] arr;
	}

	return result;
}

void ConvertUtf8ToGBK(std::string& str)
{
	const std::string result = UTF8ToGBK(str);
	str = result;
}

void ConvertGBKToUtf8(std::string& str)
{
	const std::string result = GBK2UTF8(str);
	str = result;
}

#else

void ConvertUtf8ToGBK(std::string& str)
{
	char* dst = ConvertUtf8ToGBK(str.c_str());
	str = dst;
	if(dst != NULL) free(dst);
}

void ConvertGBKToUtf8(std::string& str)
{
	int len = 0;
	char* dst = ConvertGBKToUtf8(str.c_str(), &len);
	str = dst;
	if (dst != NULL) free(dst);
}

#endif

// Static members initialization
volatile int   CHTTPClient::s_iCurlSession = 0;
std::string    CHTTPClient::s_strCertificationAuthorityFile;
HANDLE         CHTTPClient::s_mtxCurlSession;
HANDLE         CHTTPClient::m_hLock;

#ifdef DEBUG_CURL
std::string CHTTPClient::s_strCurlTraceLogDirectory;
#endif
RVCCOMM_API void SetTokenCallBack(GetTokenCallBack t_callBack)
{
	g_tokenCall = t_callBack;
}

BOOL CHTTPClient::Lock(DWORD dwTime)
{
	// 如果还没有创建锁就先创建一个
	if (!m_hLock)
	{
		m_hLock = ::CreateMutex(NULL, FALSE, NULL);
		if (!m_hLock)
			return FALSE;
	}
	// 哪个线程最先调用等待函数就最先占用这个互斥量
	DWORD dwRet = ::WaitForSingleObject(m_hLock, dwTime);
	return (dwRet == WAIT_OBJECT_0 || dwRet == WAIT_ABANDONED);
}

void CHTTPClient::Unlock()
{
	if (m_hLock)
		::ReleaseMutex(m_hLock);
}

/**
 * @brief constructor of the HTTP client object
 *
 * @param Logger - a callabck to a logger function void(const std::string&)
 *
 */
CHTTPClient::CHTTPClient(LogFnCallback Logger) :
   m_oLog(Logger),
   m_iCurlTimeout(30),
   m_bHTTPS(false),
   m_bNoSignal(false),
   m_bProgressCallbackSet(false),
   m_eSettingsFlags(ENABLE_LOG),
   m_pCurlSession(nullptr),
   m_pHeaderlist(nullptr)
{

#if defined(_MSC_VER)
	Lock(INFINITE);
	if (s_iCurlSession++ == 0)
	{
		/* In windows, this will init the winsock stuff */
		curl_global_init(CURL_GLOBAL_ALL);
	}
	Unlock();
#else
	toolkit_once(&once4curl, init_libcurl_once);
#endif //RVC_OS_WIN

	InitSession(false, ENABLE_LOG);
}

/**
 * @brief destructor of the HTTP client object
 *
 */
CHTTPClient::~CHTTPClient()
{
   if (m_pCurlSession != nullptr)
   {
      CleanupSession();
   }

#if defined(RVC_OS_WIN)
   Lock(INFINITE);
   if (--s_iCurlSession <= 0) {
       curl_global_cleanup();
   }
   Unlock();
#endif //RVC_OS_WIN
}

/**
 * @brief Starts a new HTTP session, initializes the cURL API session
 *
 * If a new session was already started, the method has no effect.
 *
 * @param [in] bHTTPS Enable/Disable HTTPS (disabled by default)
 * @param [in] eSettingsFlags optional use | operator to choose multiple options
 *
 * @retval true   Successfully initialized the session.
 * @retval false  The session is already initialized
 * Use CleanupSession() before initializing a new one or the Curl API is not initialized.
 *
 * Example Usage:
 * @code
 *    m_pHTTPClient->InitSession();
 * @endcode
 */
const bool CHTTPClient::InitSession(const bool& bHTTPS /* = false */,
                                    const SettingsFlag& eSettingsFlags /* = ALL_FLAGS */)
{
   if (m_pCurlSession)
   {
      if (eSettingsFlags & ENABLE_LOG)
         m_oLog(LOG_ERROR_CURL_ALREADY_INIT_MSG);

      return false;
   }
   m_pCurlSession = curl_easy_init();
   curl_easy_setopt(m_pCurlSession, CURLOPT_FORBID_REUSE, 1); //避免大量的TCP连接保持在CLOSE_WAIT状态 

   m_bHTTPS = bHTTPS;
   m_eSettingsFlags = eSettingsFlags;

   return (m_pCurlSession != nullptr);
}

/**
 * @brief Cleans the current HTTP session
 *
 * If a session was not already started, the method has no effect
 *
 * @retval true   Successfully cleaned the current session.
 * @retval false  The session is not already initialized.
 *
 * Example Usage:
 * @code
 *    m_pHTTPClient->CleanupSession();
 * @endcode
 */
const bool CHTTPClient::CleanupSession()
{
   if (!m_pCurlSession)
   {
      if (m_eSettingsFlags & ENABLE_LOG)
         m_oLog(LOG_ERROR_CURL_NOT_INIT_MSG);

      return false;
   }

#ifdef DEBUG_CURL
   if (m_ofFileCurlTrace.is_open())
   {
      m_ofFileCurlTrace.close();
   }
#endif

   curl_easy_cleanup(m_pCurlSession);
   m_pCurlSession = nullptr;

   if (m_pHeaderlist)
   {
      curl_slist_free_all(m_pHeaderlist);
      m_pHeaderlist = nullptr;
   }

   return true;
}

/**
 * @brief sets the progress function callback and the owner of the client
 *
 * @param [in] pOwner pointer to the object owning the client, nullptr otherwise
 * @param [in] fnCallback callback to progress function
 *
 */
/*inline*/ void CHTTPClient::SetProgressFnCallback(void* pOwner, const ProgressFnCallback& fnCallback)
{
   m_ProgressStruct.pOwner = pOwner;
   m_fnProgressCallback = fnCallback;
   m_ProgressStruct.pCurl = m_pCurlSession;
   m_ProgressStruct.dLastRunTime = 0;
   m_bProgressCallbackSet = true;
}

/**
 * @brief sets the HTTP Proxy address to tunnel the operation through it
 *
 * @param [in] strProxy URI of the HTTP Proxy
 *
 */
/*inline*/ void CHTTPClient::SetProxy(const std::string& strProxy)
{
   if (strProxy.empty())
      return;

   std::string strUri = strProxy;
   std::transform(strUri.begin(), strUri.end(), strUri.begin(), ::toupper);

   if (strUri.compare(0, 4, "HTTP") != 0)
      m_strProxy = "http://" + strProxy;
   else
      m_strProxy = strProxy;
};

/**
 * @brief checks a URI
 * adds the proper protocol scheme (HTTP:// or HTTPS://)
 * if the URI has no protocol scheme, the added protocol scheme
 * will depend on m_bHTTPS that can be set when initializing a session
 * or with the SetHTTPS(bool)
 *
 * @param [in] strURL user URI
 */
inline void CHTTPClient::CheckURL(const std::string& strURL)
{
   std::string strTmp = strURL;

   std::transform(strTmp.begin(), strTmp.end(), strTmp.begin(), ::toupper);

   if (strTmp.compare(0, 7, "HTTP://") == 0)
      m_bHTTPS = false;
   else if (strTmp.compare(0, 8, "HTTPS://") == 0)
      m_bHTTPS = true;
   else
   {
      m_strURL = ((m_bHTTPS) ? "https://" : "http://") + strURL;
      return;
   }
   m_strURL = strURL;
}

/**
* @brief performs the chosen HTTP request
* sets up the common settings (Timeout, proxy,...)
*
*
* @retval true   Successfully performed the request.
* @retval false  An error occured while CURL was performing the request.
*/
const CURLcode CHTTPClient::Perform()
{
   if (!m_pCurlSession)
   {
      if (m_eSettingsFlags & ENABLE_LOG)
         m_oLog(LOG_ERROR_CURL_NOT_INIT_MSG);

      return CURLE_FAILED_INIT;
   }

   CURLcode res = CURLE_OK;

   curl_easy_setopt(m_pCurlSession, CURLOPT_URL, m_strURL.c_str());
   curl_easy_setopt(m_pCurlSession, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);

   if (m_pHeaderlist != nullptr)
      curl_easy_setopt(m_pCurlSession, CURLOPT_HTTPHEADER, m_pHeaderlist);

   curl_easy_setopt(m_pCurlSession, CURLOPT_USERAGENT, CLIENT_USERAGENT);
   curl_easy_setopt(m_pCurlSession, CURLOPT_AUTOREFERER, 1L);
   curl_easy_setopt(m_pCurlSession, CURLOPT_FOLLOWLOCATION, 1L);

   if (m_iCurlTimeout > 0)
   {
      curl_easy_setopt(m_pCurlSession, CURLOPT_TIMEOUT, m_iCurlTimeout);
      // don't want to get a sig alarm on timeout
      curl_easy_setopt(m_pCurlSession, CURLOPT_NOSIGNAL, 1L);
   }

   if (!m_strProxy.empty())
   {
      curl_easy_setopt(m_pCurlSession, CURLOPT_PROXY, m_strProxy.c_str());
      curl_easy_setopt(m_pCurlSession, CURLOPT_HTTPPROXYTUNNEL, 1L);      
   }

   if (m_bNoSignal)
   {
      curl_easy_setopt(m_pCurlSession, CURLOPT_NOSIGNAL, 1L);
   }

   if (m_bProgressCallbackSet)
   {
      curl_easy_setopt(m_pCurlSession, CURLOPT_PROGRESSFUNCTION, GetProgressFnCallback());
      curl_easy_setopt(m_pCurlSession, CURLOPT_PROGRESSDATA, &m_ProgressStruct);
      curl_easy_setopt(m_pCurlSession, CURLOPT_NOPROGRESS, 0L);
   }

   // SSL
   if (m_bHTTPS)
   {
      curl_easy_setopt(m_pCurlSession, CURLOPT_USE_SSL, CURLUSESSL_ALL);
   }

   if (m_bHTTPS && !(m_eSettingsFlags & VERIFY_PEER)){
      curl_easy_setopt(m_pCurlSession, CURLOPT_SSL_VERIFYPEER, 0L);
	  //m_oLog("不验证证书!");
   }
   else{
	   //m_oLog("验证证书!");
   }

   if (m_bHTTPS && !(m_eSettingsFlags & VERIFY_HOST)){
      curl_easy_setopt(m_pCurlSession, CURLOPT_SSL_VERIFYHOST, 0L); // use 2L for strict name check
   }

   if (m_bHTTPS && !s_strCertificationAuthorityFile.empty())
      curl_easy_setopt(m_pCurlSession, CURLOPT_CAINFO, s_strCertificationAuthorityFile.c_str());

   if (m_bHTTPS && !m_strSSLCertFile.empty())
      curl_easy_setopt(m_pCurlSession, CURLOPT_SSLCERT, m_strSSLCertFile.c_str());

   if (m_bHTTPS && !m_strSSLKeyFile.empty())
      curl_easy_setopt(m_pCurlSession, CURLOPT_SSLKEY, m_strSSLKeyFile.c_str());

   if (m_bHTTPS && !m_strSSLKeyPwd.empty())
      curl_easy_setopt(m_pCurlSession, CURLOPT_KEYPASSWD, m_strSSLKeyPwd.c_str());

#ifdef DEBUG_CURL
   StartCurlDebug();
#endif

   // Perform the requested operation
   res = curl_easy_perform(m_pCurlSession);

#ifdef DEBUG_CURL
   EndCurlDebug();
#endif

   if (m_pHeaderlist)
   {
      curl_slist_free_all(m_pHeaderlist);
      m_pHeaderlist = nullptr;
   }

   return res;
}

/**
 * @brief requests the content of a URI
 *
 * @param [in] strURL URI of the remote location (with the file name).
 * @param [out] strOutput reference to an output string.
 * @param [out] lHTTPStatusCode HTTP Status code of the response.
 *
 * @retval true   Successfully requested the URI.
 * @retval false  Encountered a problem.
 *
 * Example Usage:
 * @code
 *    std::string strWebPage;
 *    long lHTTPStatusCode = 0;
 *    m_pHTTOClient->GetText("https://www.google.com", strWebPage, lHTTPStatusCode);
 * @endcode
 */
const bool CHTTPClient::GetText(const std::string& strURL,
                                std::string& strOutput,
                                long& lHTTPStatusCode)
{
   if (strURL.empty())
   {
      if (m_eSettingsFlags & ENABLE_LOG)
         m_oLog(LOG_ERROR_EMPTY_HOST_MSG);

      return false;
   }
   if (!m_pCurlSession)
   {
      if (m_eSettingsFlags & ENABLE_LOG)
         m_oLog(LOG_ERROR_CURL_NOT_INIT_MSG);

      return false;
   }
   // Reset is mandatory to avoid bad surprises
   curl_easy_reset(m_pCurlSession);

   CheckURL(strURL);

   curl_easy_setopt(m_pCurlSession, CURLOPT_HTTPGET, 1L);
   curl_easy_setopt(m_pCurlSession, CURLOPT_WRITEFUNCTION, WriteInStringCallback);
   curl_easy_setopt(m_pCurlSession, CURLOPT_WRITEDATA, &strOutput);

   CURLcode res = Perform();

   curl_easy_getinfo(m_pCurlSession, CURLINFO_RESPONSE_CODE, &lHTTPStatusCode);

   // Check for errors
   if (res != CURLE_OK)
   {
	   if (m_eSettingsFlags & ENABLE_LOG){
		   char errMsg[1024] = {0};
		   _snprintf(errMsg, 1023, LOG_ERROR_CURL_REQ_FAILURE_FORMAT, m_strURL.c_str(), res, curl_easy_strerror(res), lHTTPStatusCode);
		   m_oLog(errMsg);
	   }

      return false;
   }

   return true;
}

/**
 * @brief Downloads a remote file to a local file.
 *
 * @param [in] strLocalFile Complete path of the local file to download.
 * @param [in] strURL URI of the remote location (with the file name).
 * @param [out] lHTTPStatusCode HTTP Status code of the response.
 *
 * @retval true   Successfully downloaded the file.
 * @retval false  The file couldn't be downloaded. Check the log messages for more information.
 */
const bool CHTTPClient::DownloadFile(const std::string& strLocalFile,
                                     const std::string& strURL,
                                     long& lHTTPStatusCode)
{
   if (strURL.empty() || strLocalFile.empty())
      return false;

   if (!m_pCurlSession)
   {
      if (m_eSettingsFlags & ENABLE_LOG)
         m_oLog(LOG_ERROR_CURL_NOT_INIT_MSG);

      return false;
   }
   // Reset is mandatory to avoid bad surprises
   curl_easy_reset(m_pCurlSession);

   CheckURL(strURL);

   std::ofstream ofsOutput;
   ofsOutput.open(strLocalFile, std::ofstream::out | std::ofstream::binary | std::ofstream::trunc);

   if (ofsOutput)
   {
      curl_easy_setopt(m_pCurlSession, CURLOPT_HTTPGET, 1L);
      curl_easy_setopt(m_pCurlSession, CURLOPT_WRITEFUNCTION, WriteToFileCallback);
      curl_easy_setopt(m_pCurlSession, CURLOPT_WRITEDATA, &ofsOutput);

      CURLcode res = Perform();

      ofsOutput.close();
      curl_easy_getinfo(m_pCurlSession, CURLINFO_RESPONSE_CODE, &lHTTPStatusCode);

      //double dUploadLength = 0;
      //curl_easy_getinfo(m_pCurlSession, CURLINFO_CONTENT_LENGTH_UPLOAD, &dUploadLength); // number of bytes uploaded
      
      /* Delete downloaded file if status code != 200 as server's response body may
      contain error 404 */
      if (lHTTPStatusCode != 200)
         remove(strLocalFile.c_str());

      if (res != CURLE_OK)
      {

		  if (m_eSettingsFlags & ENABLE_LOG){
			   char errMsg[1024] = {0};
			   _snprintf(errMsg, 1023, LOG_ERROR_CURL_DOWNLOAD_FAILURE_FORMAT, strLocalFile.c_str(),
				   strURL.c_str(), res, curl_easy_strerror(res), lHTTPStatusCode);
			   m_oLog(errMsg);
		  }

         return false;
      }
   }
   else if (m_eSettingsFlags & ENABLE_LOG)
   {    
	  char errMsg[1024] = {0};
	  _snprintf(errMsg, 1023, LOG_ERROR_DOWNLOAD_FILE_FORMAT, strLocalFile.c_str());
	  m_oLog(errMsg);

      return false;
   }

   return true;
}

/**
 * @brief uploads a POST form
 *
 *
 * @param [in] strURL URL to which the form will be posted.
 * @param [in] data post form information
 * @param [out] lHTTPStatusCode HTTP Status code of the response.
 *
 * @retval true   Successfully posted the header.
 * @retval false  The header couldn't be posted.
 */
const bool CHTTPClient::UploadForm(const std::string& strURL,
                                   const PostFormInfo& data,
                                   long& lHTTPStatusCode)
{
   if (strURL.empty())
   {
      if (m_eSettingsFlags & ENABLE_LOG)
         m_oLog(LOG_ERROR_EMPTY_HOST_MSG);

      return false;
   }
   if (!m_pCurlSession)
   {
      if (m_eSettingsFlags & ENABLE_LOG)
         m_oLog(LOG_ERROR_CURL_NOT_INIT_MSG);

      return false;
   }
   // Reset is mandatory to avoid bad surprises
   curl_easy_reset(m_pCurlSession);

   CheckURL(strURL);

   /** Now specify we want to POST data */
   curl_easy_setopt(m_pCurlSession, CURLOPT_POST, 1L);

   /* stating that Expect: 100-continue is not wanted */
   AddHeader("Expect:");
   
   /** set post form */
   if (data.m_pFormPost != nullptr)
      curl_easy_setopt(m_pCurlSession, CURLOPT_HTTPPOST, data.m_pFormPost);

   /* to avoid printing response's body to stdout.
    * CURLOPT_WRITEDATA : by default, this is a FILE * to stdout. */
   curl_easy_setopt(m_pCurlSession, CURLOPT_WRITEFUNCTION, ThrowAwayCallback);

   CURLcode res = Perform();

   curl_easy_getinfo(m_pCurlSession, CURLINFO_RESPONSE_CODE, &lHTTPStatusCode);

   // Check for errors
   if (res != CURLE_OK)
   {
	   if (m_eSettingsFlags & ENABLE_LOG)
	   {
		   char errMsg[1024] = {0};
		   _snprintf(errMsg,1023, LOG_ERROR_CURL_REQ_FAILURE_FORMAT, m_strURL.c_str(), res,
			   curl_easy_strerror(res), lHTTPStatusCode);
		   m_oLog(errMsg);
	   }

      return false;
   }

   return true;
}

/************************************************************************/
/* add by cfq 添加文件块上传                                            */
/************************************************************************/
const bool CHTTPClient:: UploadFileBlock(CHTTPUploadReq &req, CHTTPUploadRet &ret, HttpClientTraceLink* pTrace)
{	
	if(req.url.empty()){
		if (m_eSettingsFlags & ENABLE_LOG)
			m_oLog(LOG_ERROR_EMPTY_HOST_MSG);

		return false;
	}

	if (!m_pCurlSession)
	{
		if (m_eSettingsFlags & ENABLE_LOG)
			m_oLog(LOG_ERROR_CURL_NOT_INIT_MSG);

		return false;
	}
	// Reset is mandatory to avoid bad surprises
	curl_easy_reset(m_pCurlSession);

	CheckURL(req.url);

	if(req.m_printDbg){	
		m_oLog(req.url.c_str());
		std::string msg = "是否是https请求:";
		msg.append(m_bHTTPS ? "true" : "false");
		m_oLog(msg.c_str());
	}

	/** Now specify we want to POST data */
	curl_easy_setopt(m_pCurlSession, CURLOPT_POST, 1L);

   unordered_map<string, string> m_headers;
   if (pTrace != NULL
		&& strlen(pTrace->X_B3_BusinessId) > 0
		&& strlen(pTrace->X_B3_TraceId) > 0
		&& strlen(pTrace->X_B3_SpanId) > 0
		&& strlen(pTrace->X_B3_ParentSpanId) > 0
		&& strlen(pTrace->X_B3_Timestamp) > 0)
	{
		m_headers.emplace(std::make_pair("X_B3_BusinessId", pTrace->X_B3_BusinessId));
		m_headers.emplace(std::make_pair("X_B3_TraceId", pTrace->X_B3_TraceId));
		m_headers.emplace(std::make_pair("X_B3_SpanId", pTrace->X_B3_SpanId));
		m_headers.emplace(std::make_pair("X_B3_ParentSpanId", pTrace->X_B3_ParentSpanId));
		m_headers.emplace(std::make_pair("X_B3_Timestamp", pTrace->X_B3_Timestamp));
	}
   std::string strHeader;
   for (HeadersMap::const_iterator it = m_headers.cbegin();
      it != m_headers.cend();
      ++it)
   {
      strHeader = it->first + ": " + it->second; // build header string
      AddHeader(strHeader);
   }
	/* stating that Expect: 100-continue is not wanted */
	AddHeader("Expect:");
	curl_httppost* pFormPost = NULL;
	curl_httppost* pLastFormptr = NULL;
	
	//添加参数
	if(req.m_bTransCode){
		if(req.m_printDbg){
			m_oLog("url转码 GBK=>UTF-8");
		}
		ConvertGBKToUtf8(req.paramContent); //转码
	}
	curl_formadd(&pFormPost, &pLastFormptr,
		CURLFORM_COPYNAME, "params",
		CURLFORM_COPYCONTENTS, req.paramContent.c_str(),
		CURLFORM_END);
	//添加文件流
	curl_formadd(&pFormPost, &pLastFormptr,
		CURLFORM_COPYNAME, "file_content",
		CURLFORM_BUFFER, req.fileName.c_str(),
		CURLFORM_BUFFERPTR, req.fileContent,
		CURLFORM_BUFFERLENGTH, req.fileContentSize,
		CURLFORM_CONTENTTYPE, "application/octet-stream",
		CURLFORM_END);

	/** set post form */
	if (pFormPost != nullptr)
		curl_easy_setopt(m_pCurlSession, CURLOPT_HTTPPOST, pFormPost);
	//接受响应body
   curl_easy_setopt(m_pCurlSession, CURLOPT_WRITEFUNCTION, WriteInStringCallback);
   curl_easy_setopt(m_pCurlSession, CURLOPT_WRITEDATA, &ret.strBody);
   //接受响应头
   curl_easy_setopt(m_pCurlSession, CURLOPT_HEADERFUNCTION, HeaderCallback);
   curl_easy_setopt(m_pCurlSession, CURLOPT_HEADERDATA, &ret.m_headers);
   //set timeout
   m_iCurlTimeout = req.m_timeOut;

   if(req.m_printDbg){	
	   m_oLog("开始发起上传请求!");
   }

   CURLcode res = Perform();

   curl_easy_getinfo(m_pCurlSession, CURLINFO_RESPONSE_CODE, &ret.httpCode);
   curl_formfree(pFormPost);

   //添加参数
   if(req.m_bTransCode){
	   if(req.m_printDbg){
		   m_oLog("url转码 UTF-8=>GBK");
	   }
	  ConvertUtf8ToGBK(ret.strBody);
   }

   // Check for errors
   if (res != CURLE_OK)
   {
	   ret.httpCode = -1;
	   ret.strBody.clear();
	   if (m_eSettingsFlags & ENABLE_LOG)
	   {
		   char errMsg[1024] = {0};
		   _snprintf(errMsg, 1023, LOG_ERROR_CURL_REQ_FAILURE_FORMAT, m_strURL.c_str(), res,
			   curl_easy_strerror(res), ret.httpCode);
		   m_oLog(errMsg);
	   }

	   return false;
   }
   else{
	   if(req.m_printDbg){	
		   m_oLog("文件块上传成功!");
	   }

	   try
	   {
		   Json::Value root;
		   Json::Reader reader;
		   reader.parse(ret.strBody,root,false);
		   if(root.isMember("code") && root.isMember("message"))
		   {
			   ret.m_userCode = root["code"].asString();
			   ret.m_errMsg = root["message"].asString();
			   return true;

		   }
		   else
		   {
			   char errMsg[1024] = {0};
			   _snprintf(errMsg, 1023, LOG_ERROR_RESPONSE_FORMAT_FAILTURE_MSG, ret.strBody.c_str());

			   ret.m_userCode = "0";
			   ret.m_errMsg = "Unexpected format of stupid previous assuption!";
			   return true;
		   }
	   }
	   catch(...){
		   m_oLog(LOG_ERROR_PARSE_JSON_FAILTURE_MSG);
		   return false;
	   }
   }

   return true;
}

/************************************************************************/
/* add by cfq 添加文件块下载                                            */
/************************************************************************/
const bool CHTTPClient:: DownloadFileBlock(const char* url, const char* jsonReqStr, fileContentArray& content, long &httpCode, unordered_map<string, string>& responseHeaders, long timeout, HttpClientTraceLink* pTrace)
{
	if (url == nullptr)
		return false;

	if (!m_pCurlSession)
	{
		if (m_eSettingsFlags & ENABLE_LOG)
			m_oLog(LOG_ERROR_CURL_NOT_INIT_MSG);

		return false;
	}
	// Reset is mandatory to avoid bad surprises
	curl_easy_reset(m_pCurlSession);

	CheckURL(url);

	if(content.copyPtr != NULL){
      // Add headers
      unordered_map<string, string> m_headers;
      if (pTrace != NULL
         && strlen(pTrace->X_B3_BusinessId) > 0
         && strlen(pTrace->X_B3_TraceId) > 0
         && strlen(pTrace->X_B3_SpanId) > 0
         && strlen(pTrace->X_B3_ParentSpanId) > 0
         && strlen(pTrace->X_B3_Timestamp) > 0)
      {
         m_headers.emplace(std::make_pair("X_B3_BusinessId", pTrace->X_B3_BusinessId));
         m_headers.emplace(std::make_pair("X_B3_TraceId", pTrace->X_B3_TraceId));
         m_headers.emplace(std::make_pair("X_B3_SpanId", pTrace->X_B3_SpanId));
         m_headers.emplace(std::make_pair("X_B3_ParentSpanId", pTrace->X_B3_ParentSpanId));
         m_headers.emplace(std::make_pair("X_B3_Timestamp", pTrace->X_B3_Timestamp));
      }
      std::string strHeader;
      for (HeadersMap::const_iterator it = m_headers.cbegin();
         it != m_headers.cend();
         ++it)
      {
         strHeader = it->first + ": " + it->second; // build header string
         AddHeader(strHeader);
      }

		curl_easy_setopt(m_pCurlSession, CURLOPT_HTTPPOST, 1);
		curl_easy_setopt(m_pCurlSession, CURLOPT_POSTFIELDS, jsonReqStr);
		//接受响应头
		curl_easy_setopt(m_pCurlSession, CURLOPT_HEADERFUNCTION, HeaderCallback);
		curl_easy_setopt(m_pCurlSession, CURLOPT_HEADERDATA, &responseHeaders);
		*(content.curLen) = 0;
		curl_easy_setopt(m_pCurlSession, CURLOPT_WRITEFUNCTION, WriteInByteCallback);
		curl_easy_setopt(m_pCurlSession, CURLOPT_WRITEDATA, &content);
		m_iCurlTimeout = timeout;//下载读写数据超时
		AddHeader("Content-Type:application/json");
		CURLcode res = Perform();

		curl_easy_getinfo(m_pCurlSession, CURLINFO_RESPONSE_CODE, &httpCode);

		// Check for errors
		if (res != CURLE_OK)
		{
			httpCode = -1;
			if (m_eSettingsFlags & ENABLE_LOG)
			{
				char errMsg[1024] = {0};
				_snprintf(errMsg, 1023, LOG_ERROR_CURL_REQ_FAILURE_FORMAT, m_strURL.c_str(), res,
					curl_easy_strerror(res), httpCode);
				m_oLog(errMsg);
			}

			return false;
		}

		return true;
	}
	else{
		return false;
	}
}

/**
 * @brief PostFormInfo constructor
 */
CHTTPClient::PostFormInfo::PostFormInfo() :
   m_pFormPost(nullptr), m_pLastFormptr(nullptr)
{
}

/**
 * @brief PostFormInfo destructor
 */
CHTTPClient::PostFormInfo::~PostFormInfo()
{
   // cleanup the formpost chain
   if (m_pFormPost)
   {
      curl_formfree(m_pFormPost);
      m_pFormPost = nullptr;
      m_pLastFormptr = nullptr;
   }
}

/**
 * @brief set the name and the value of the HTML "file" form's input
 *
 * @param fieldName name of the "file" input
 * @param fieldValue path to the file to upload
 */
void CHTTPClient::PostFormInfo::AddFormFile(const std::string& strFieldName,
                                            const std::string& strFieldValue)
{
   curl_formadd(&m_pFormPost, &m_pLastFormptr,
      CURLFORM_COPYNAME, strFieldName.c_str(),
      CURLFORM_FILE, strFieldValue.c_str(),
      CURLFORM_END);
}

/**
 * @brief set the name and the value of an HTML form's input
 * (other than "file" like "text", "hidden" or "submit")
 *
 * @param fieldName name of the input element
 * @param fieldValue value to be assigned to the input element
 */
void CHTTPClient::PostFormInfo::AddFormContent(const std::string& strFieldName,
                                               const std::string& strFieldValue)
{
   curl_formadd(&m_pFormPost, &m_pLastFormptr,
      CURLFORM_COPYNAME, strFieldName.c_str(),
      CURLFORM_COPYCONTENTS, strFieldValue.c_str(),
      CURLFORM_END);
}

// REST REQUESTS

/**
* @brief initializes a REST request
* some common operations to REST requests are performed here,
* the others are performed in Perform method
*
* @param [in] Headers headers to send
* @param [out] Response response data
*/
inline const bool CHTTPClient::InitRestRequest(const std::string& strUrl,
                                         const CHTTPClient::HeadersMap& Headers,
                                         CHTTPClient::HttpResponse& Response)
{
   if (strUrl.empty())
   {
      if (m_eSettingsFlags & ENABLE_LOG)
         m_oLog(LOG_ERROR_EMPTY_HOST_MSG);

      return false;
   }
   if (!m_pCurlSession)
   {
      if (m_eSettingsFlags & ENABLE_LOG)
         m_oLog(LOG_ERROR_CURL_NOT_INIT_MSG);

      return false;
   }
   // Reset is mandatory to avoid bad surprises
   curl_easy_reset(m_pCurlSession);

   CheckURL(strUrl);

   // set the received body's callback function
   curl_easy_setopt(m_pCurlSession, CURLOPT_WRITEFUNCTION, &CHTTPClient::RestWriteCallback);

   // set data object to pass to callback function above
   curl_easy_setopt(m_pCurlSession, CURLOPT_WRITEDATA, &Response);

   // set the response's headers processing callback function
   curl_easy_setopt(m_pCurlSession, CURLOPT_HEADERFUNCTION, &CHTTPClient::RestHeaderCallback);

   // callback object for server's responses headers
   curl_easy_setopt(m_pCurlSession, CURLOPT_HEADERDATA, &Response);

   std::string strHeader;
   for (HeadersMap::const_iterator it = Headers.cbegin();
      it != Headers.cend();
      ++it)
   {
      strHeader = it->first + ": " + it->second; // build header string
      AddHeader(strHeader);
   }

   return true;
}

/**
* @brief post REST request operations are performed here
*
* @param [in] ePerformCode curl easy perform returned code
* @param [out] Response response data
*/
inline const bool CHTTPClient::PostRestRequest(const CURLcode ePerformCode,
                                               CHTTPClient::HttpResponse& Response)
{
   // Check for errors
   if (ePerformCode != CURLE_OK)
   {
      Response.strBody.clear();
      Response.iCode = -1;

	  if (m_eSettingsFlags & ENABLE_LOG){
		  char errMsg[1024] = {0};
		  _snprintf(errMsg, 1023, LOG_ERROR_CURL_REST_FAILURE_FORMAT, m_strURL.c_str(), ePerformCode,
			  curl_easy_strerror(ePerformCode));
		  m_oLog(errMsg);

		  Response.iCode = ePerformCode;
		  Response.strBody.append(errMsg);
	  }

      return false;
   }
   long lHttpCode = 0;
   curl_easy_getinfo(m_pCurlSession, CURLINFO_RESPONSE_CODE, &lHttpCode);
   Response.iCode = static_cast<int>(lHttpCode);

   return true;
}

/**
* @brief performs a HEAD request
*
* @param [in] strUrl url to request
* @param [in] Headers headers to send
* @param [out] Response response data
*
* @retval true   Successfully requested the URI.
* @retval false  Encountered a problem.
*/
const bool CHTTPClient::Head(const std::string& strUrl,
   const CHTTPClient::HeadersMap& Headers,
   CHTTPClient::HttpResponse& Response)
{
   if (InitRestRequest(strUrl, Headers, Response))
   {
      /** set HTTP HEAD METHOD */
      curl_easy_setopt(m_pCurlSession, CURLOPT_CUSTOMREQUEST, "HEAD");
      curl_easy_setopt(m_pCurlSession, CURLOPT_NOBODY, 1L);

      CURLcode res = Perform();

      return PostRestRequest(res, Response);
   }
   else
      return false;
}

/**
* @brief performs a GET request
*
* @param [in] strUrl url to request
* @param [in] Headers headers to send
* @param [out] Response response data
*
* @retval true   Successfully requested the URI.
* @retval false  Encountered a problem.
*/
const bool CHTTPClient::Get(const std::string& strUrl,
   const CHTTPClient::HeadersMap& Headers,
   CHTTPClient::HttpResponse& Response)
{
   if (InitRestRequest(strUrl, Headers, Response))
   {
      // specify a GET request
      curl_easy_setopt(m_pCurlSession, CURLOPT_HTTPGET, 1L);

      CURLcode res = Perform();

      return PostRestRequest(res, Response);
   }
   else
      return false;
}

/**
* @brief performs a DELETE request
*
* @param [in] strUrl url to request
* @param [in] Headers headers to send
* @param [out] Response response data
*
* @retval true   Successfully requested the URI.
* @retval false  Encountered a problem.
*/
const bool CHTTPClient::Del(const std::string& strUrl,
   const CHTTPClient::HeadersMap& Headers,
   CHTTPClient::HttpResponse& Response)
{
   if (InitRestRequest(strUrl, Headers, Response))
   {
      curl_easy_setopt(m_pCurlSession, CURLOPT_CUSTOMREQUEST, "DELETE");

      CURLcode res = Perform();

      return PostRestRequest(res, Response);
   }
   else
      return false;
}

const bool CHTTPClient::Post(const std::string& strUrl,
   const CHTTPClient::HeadersMap& Headers,
   const std::string& strPostData,
   CHTTPClient::HttpResponse& Response)
{
   if (InitRestRequest(strUrl, Headers, Response))
   {
      // specify a POST request
      curl_easy_setopt(m_pCurlSession, CURLOPT_POST, 1L);

      // set post informations
      curl_easy_setopt(m_pCurlSession, CURLOPT_POSTFIELDS, strPostData.c_str());
      curl_easy_setopt(m_pCurlSession, CURLOPT_POSTFIELDSIZE, strPostData.size());

      CURLcode res = Perform();

      return PostRestRequest(res, Response);
   }
   else
      return false;
}

/**
* @brief performs a PUT request with a string
*
* @param [in] strUrl url to request
* @param [in] Headers headers to send
* @param [out] Response response data
*
* @retval true   Successfully requested the URI.
* @retval false  Encountered a problem.
*/
const bool CHTTPClient::Put(const std::string& strUrl, const CHTTPClient::HeadersMap& Headers,
   const std::string& strPutData, CHTTPClient::HttpResponse& Response)
{
   if (InitRestRequest(strUrl, Headers, Response))
   {
      CHTTPClient::UploadObject Payload;

      Payload.pszData = strPutData.c_str();
      Payload.usLength = strPutData.size();

      // specify a PUT request
      curl_easy_setopt(m_pCurlSession, CURLOPT_PUT, 1L);
      curl_easy_setopt(m_pCurlSession, CURLOPT_UPLOAD, 1L);

      // set read callback function
      curl_easy_setopt(m_pCurlSession, CURLOPT_READFUNCTION, &CHTTPClient::RestReadCallback);
      // set data object to pass to callback function
      curl_easy_setopt(m_pCurlSession, CURLOPT_READDATA, &Payload);

      // set data size
      curl_easy_setopt(m_pCurlSession, CURLOPT_INFILESIZE, static_cast<long>(Payload.usLength));

      CURLcode res = Perform();

      return PostRestRequest(res, Response);
   }
   else
      return false;
}

/**
* @brief performs a PUT request with a byte buffer (vector of char)
*
* @param [in] strUrl url to request
* @param [in] Headers headers to send
* @param [out] Response response data
*
* @retval true   Successfully requested the URI.
* @retval false  Encountered a problem.
*/
const bool CHTTPClient::Put(const std::string& strUrl, const CHTTPClient::HeadersMap& Headers,
   const CHTTPClient::ByteBuffer& Data, CHTTPClient::HttpResponse& Response)
{
   if (InitRestRequest(strUrl, Headers, Response))
   {
      CHTTPClient::UploadObject Payload;

      Payload.pszData = Data.data();
      Payload.usLength = Data.size();

      // specify a PUT request
      curl_easy_setopt(m_pCurlSession, CURLOPT_PUT, 1L);
      curl_easy_setopt(m_pCurlSession, CURLOPT_UPLOAD, 1L);

      // set read callback function
      curl_easy_setopt(m_pCurlSession, CURLOPT_READFUNCTION, &CHTTPClient::RestReadCallback);
      // set data object to pass to callback function
      curl_easy_setopt(m_pCurlSession, CURLOPT_READDATA, &Payload);

      // set data size
      curl_easy_setopt(m_pCurlSession, CURLOPT_INFILESIZE, static_cast<long>(Payload.usLength));

      CURLcode res = Perform();

      return PostRestRequest(res, Response);
   }
   else
      return false;
}

// STRING HELPERS

/**
* @brief returns a formatted string
*
* @param [in] strFormat string with one or many format specifiers
* @param [in] parameters to be placed in the format specifiers of strFormat
*
* @retval string formatted string
*/
std::string CHTTPClient::StringFormat(const std::string strFormat, ...)
{
   int n = (static_cast<int>(strFormat.size())) * 2; // Reserve two times as much as the length of the strFormat
   
   std::unique_ptr<char[]> pFormatted;

   va_list ap;

   while(true)
   {
      pFormatted.reset(new char[n]); // Wrap the plain char array into the unique_ptr
      strcpy(&pFormatted[0], strFormat.c_str());
      
      va_start(ap, strFormat);
      int iFinaln = vsnprintf(&pFormatted[0], n, strFormat.c_str(), ap);
      va_end(ap);
      
      if (iFinaln < 0 || iFinaln >= n)
      {
         n += abs(iFinaln - n + 1);
      }
      else
      {
         break;
      }
   }

   return std::string(pFormatted.get());
}
/*std::string CHTTPClient::StringFormat(const std::string strFormat, ...)
{
   char buffer[1024];
   va_list args;
   va_start(args, strFormat);
   vsnprintf(buffer, 1024, strFormat.c_str(), args);
   va_end (args);
   return std::string(buffer);
}
*/

/**
* @brief removes leading and trailing whitespace from a string
*
* @param [in/out] str string to be trimmed
*/
inline void CHTTPClient::TrimSpaces(std::string& str)
{
   // trim from left
   str.erase(str.begin(),
      std::find_if(str.begin(), str.end(), [](char c) {return !isspace(c); })
   );

   // trim from right
   str.erase(std::find_if(str.rbegin(), str.rend(), [](char c) {return !isspace(c); }).base(),
      str.end()
   );
}

// CURL CALLBACKS

size_t CHTTPClient::ThrowAwayCallback(void* ptr, size_t size, size_t nmemb, void* data)
{
   reinterpret_cast<void*>(ptr);
   reinterpret_cast<void*>(data);

   /* we are not interested in the headers itself,
   so we only return the size we would have saved ... */
   return size * nmemb;
}

/**
* @brief stores the server response in a string
*
* @param ptr pointer of max size (size*nmemb) to read data from it
* @param size size parameter
* @param nmemb memblock parameter
* @param data pointer to user data (string)
*
* @return (size * nmemb)
*/
size_t CHTTPClient::WriteInStringCallback(void* ptr, size_t size, size_t nmemb, void* data)
{
   std::string* strWriteHere = reinterpret_cast<std::string*>(data);
   if (strWriteHere != nullptr)
   {
      strWriteHere->append(reinterpret_cast<char*>(ptr), size * nmemb);
      return size * nmemb;
   }
   return 0;
}

/**
* @brief stores the server response in an already opened file stream
* used by DownloadFile()
*
* @param buff pointer of max size (size*nmemb) to read data from it
* @param size size parameter
* @param nmemb memblock parameter
* @param userdata pointer to user data (file stream)
*
* @return (size * nmemb)
*/
size_t CHTTPClient::WriteToFileCallback(void* buff, size_t size, size_t nmemb, void* data)
{
   if ((size == 0) || (nmemb == 0) || ((size*nmemb) < 1) || (data == nullptr))
      return 0;

   std::ofstream* pFileStream = reinterpret_cast<std::ofstream*>(data);
   if (pFileStream->is_open())
   {
      pFileStream->write(reinterpret_cast<char*>(buff), size * nmemb);
   }

   return size * nmemb;
}

/**
* @brief reads the content of an already opened file stream
* used by UploadFile()
*
* @param ptr pointer of max size (size*nmemb) to write data to it
* @param size size parameter
* @param nmemb memblock parameter
* @param stream pointer to user data (file stream)
*
* @return (size * nmemb)
*/
size_t CHTTPClient::ReadFromFileCallback(void* ptr, size_t size, size_t nmemb, void* stream)
{
   std::ifstream* pFileStream = reinterpret_cast<std::ifstream*>(stream);
   if (pFileStream->is_open())
   {
      pFileStream->read(reinterpret_cast<char*>(ptr), size * nmemb);
      return pFileStream->gcount();
   }
   return 0;
}

// REST CALLBACKS

/**
* @brief write callback function for libcurl
* this callback will be called to store the server's Body reponse
* in a struct response
*
* we can also use an std::vector<char> instead of an std::string but in this case
* there isn't a big difference... maybe resizing the container with a max size can
* enhance performances...
*
* @param data returned data of size (size*nmemb)
* @param size size parameter
* @param nmemb memblock parameter
* @param userdata pointer to user data to save/work with return data
*
* @return (size * nmemb)
*/
size_t CHTTPClient::RestWriteCallback(void* pCurlData, size_t usBlockCount, size_t usBlockSize, void* pUserData)
{
   CHTTPClient::HttpResponse* pServerResponse;
   pServerResponse = reinterpret_cast<CHTTPClient::HttpResponse*>(pUserData);
   pServerResponse->strBody.append(reinterpret_cast<char*>(pCurlData), usBlockCount * usBlockSize);

   return (usBlockCount * usBlockSize);
}

/**
* @brief header callback for libcurl
* callback used to process response's headers (received)
*
* @param data returned (header line)
* @param size of data
* @param nmemb memblock
* @param userdata pointer to user data object to save header data
* @return size * nmemb;
*/
size_t CHTTPClient::RestHeaderCallback(void* pCurlData, size_t usBlockCount, size_t usBlockSize, void* pUserData)
{
   CHTTPClient::HttpResponse* pServerResponse;
   pServerResponse = reinterpret_cast<CHTTPClient::HttpResponse*>(pUserData);

   std::string strHeader(reinterpret_cast<char*>(pCurlData), usBlockCount * usBlockSize);
   size_t usSeperator = strHeader.find_first_of(":");
   if (std::string::npos == usSeperator)
   {
      //roll with non seperated headers or response's line
      TrimSpaces(strHeader);
      if (0 == strHeader.length())
      {
         return (usBlockCount * usBlockSize); //blank line;
      }
      pServerResponse->mapHeaders[strHeader] = "present";
   }
   else
   {
      std::string strKey = strHeader.substr(0, usSeperator);
      TrimSpaces(strKey);
      std::string strValue = strHeader.substr(usSeperator + 1);
      TrimSpaces(strValue);
      pServerResponse->mapHeaders[strKey] = strValue;
   }

   return (usBlockCount * usBlockSize);
}

size_t CHTTPClient::HeaderCallback(void* pCurlData, size_t usBlockCount, size_t usBlockSize, void* pUserData)
{
   CHTTPClient::HeadersMap *pheaderMap;
   pheaderMap = reinterpret_cast<CHTTPClient::HeadersMap*>(pUserData);

   std::string strHeader(reinterpret_cast<char*>(pCurlData), usBlockCount * usBlockSize);
   size_t usSeperator = strHeader.find_first_of(":");
   if (std::string::npos == usSeperator)
   {
	   //roll with non seperated headers or response's line
	   TrimSpaces(strHeader);
	   if (0 == strHeader.length())
	   {
		   return (usBlockCount * usBlockSize); //blank line;
	   }
	   (*pheaderMap)[strHeader] = "present";
   }
   else
   {
	   std::string strKey = strHeader.substr(0, usSeperator);
	   TrimSpaces(strKey);
	   std::string strValue = strHeader.substr(usSeperator + 1);
	   TrimSpaces(strValue);
	  (*pheaderMap)[strKey] = strValue;
   }

   return (usBlockCount * usBlockSize);
}

size_t CHTTPClient:: WriteInByteCallback(void* ptr, size_t size, size_t nmemb, void* pUserData)
{
	fileContentArray *wbyte = reinterpret_cast<fileContentArray*>(pUserData);
	if (wbyte == NULL || wbyte->copyPtr == NULL) {
		return -1;
	}
	else {
		size_t len = size * nmemb;
		*(wbyte->curLen) += len;
		if (len != 0 && *(wbyte->curLen) <= wbyte->maxLen) {
			memcpy(wbyte->copyPtr, ptr, len);
			wbyte->copyPtr += len;//移动指针
			return len;
		}
		else {
			return -2;
		}
	}
}


/**
* @brief read callback function for libcurl
* used to send (or upload) a content to the server
*
* @param pointer of max size (size*nmemb) to write data to (used by cURL to send data)
* @param size size parameter
* @param nmemb memblock parameter
* @param userdata pointer to user data to read data from
*
* @return (size * nmemb)
*/
size_t CHTTPClient::RestReadCallback(void* pCurlData, size_t usBlockCount, size_t usBlockSize, void* pUserData)
{
   // get upload struct
   CHTTPClient::UploadObject* Payload;

   Payload = reinterpret_cast<CHTTPClient::UploadObject*>(pUserData);

   // set correct sizes
   size_t usCurlSize = usBlockCount * usBlockSize;
   size_t usCopySize = (Payload->usLength < usCurlSize) ? Payload->usLength : usCurlSize;

   /** copy data to buffer */
   std::memcpy(pCurlData, Payload->pszData, usCopySize);

   // decrement length and increment data pointer
   Payload->usLength -= usCopySize; // remaining bytes to be sent
   Payload->pszData += usCopySize;  // next byte to the chunk that will be sent

                                    /** return copied size */
   return usCopySize;
}

//add by cfq
const bool CHTTPClient::Get(CHTTPReq &req, CHTTPRet &ret, HttpClientTraceLink* pTrace){
	//拼接请求参数
	string param;
	std::string jsonStr="";
	try
	{
		jsonStr= req.ToJson();
	}
	catch (...)
	{
		m_oLog(LOG_ERROR_GET_JSON_FAILTURE_MSG);
	}
	if(jsonStr.empty())
	{
		param = "";
	}
	else
	{
		Json::Value root;
		Json::Reader reader;
		reader.parse(jsonStr,root,false);
		Json::Value::Members mem = root.getMemberNames();
		for(auto iter = mem.begin(); iter != mem.end(); iter++){
			switch(root[*iter].type()){
			case Json::intValue:
				char a[20];
				_snprintf(a, sizeof(a), "%d", root[*iter].asInt());
				param = param.append((*iter).c_str()).append("=").append(a);
				break;
			case Json::stringValue:
				param = param.append((*iter).c_str()).append("=").append(root[*iter].asCString());
				break;
			case Json::realValue:
				char b[20];
				_snprintf(b, sizeof(b), "%.21f", root[*iter].asDouble());
				param = param.append((*iter).c_str()).append("=").append(b);
				break;
			case Json::booleanValue:
				param = param.append((*iter).c_str()).append("=").append(root[*iter].asBool() ? "true": "false");
				break;
			default:
				break;
			}
			if((iter + 1) != mem.end()){
				param = param.append("&");
			}
			//root.clear();
		}
	}
	char requestData[20000];
	_snprintf(requestData, sizeof(requestData), "%s", param.c_str());
	if(req.m_printDbg){
		m_oLog(requestData);
	}
	//urlEncode
	char *requestData_encode = curl_easy_escape(m_pCurlSession, requestData, 0);
	if(req.m_printDbg){
		string str;
		str.append("queryString encode:");
		str.append(requestData);
		m_oLog(str.c_str());
	}
	
	if(!req.m_url.empty()){
		char *url = new char[req.m_url.length()+param.length()+2];
		_snprintf(url, req.m_url.length()+param.length()+1, "%s?%s", req.m_url.c_str(), param.c_str());
		m_oLog(url);
		delete[] url;
	}
	else{
		m_oLog(LOG_ERROR_PATH_NULL_MSG);
		return false;
	}

	if(req.m_headers.empty()){
		if(req.m_printDbg){
			m_oLog("没有指定请求头内容，使用默认值Accept=application/json");
		}
		req.m_headers.emplace(std::make_pair("Accept", "application/json"));
	}
	if (req.m_withToken && g_tokenCall != NULL)
	{
		std::string channelId = "";
		std::string token = "";
		std::string terminalno = "";
		std::string reserve1 = "";
		g_tokenCall(channelId, token, terminalno, reserve1);
		if (channelId.length() != 0 && token.length() != 0)
		{
			req.m_headers.emplace(std::make_pair("channelId", channelId));
			req.m_headers.emplace(std::make_pair("token", token));
			req.m_headers.emplace(std::make_pair("terminalno", terminalno));
			string out = "channelId:" + channelId + ", token:" + token;
			if (req.m_printDbg)
				m_oLog(out.c_str());
		}
	}

	if (pTrace != NULL
		&& strlen(pTrace->X_B3_BusinessId) > 0
		&& strlen(pTrace->X_B3_TraceId) > 0
		&& strlen(pTrace->X_B3_SpanId) > 0
		&& strlen(pTrace->X_B3_ParentSpanId) > 0
		&& strlen(pTrace->X_B3_Timestamp) > 0)
	{
		req.m_headers.emplace(std::make_pair("X_B3_BusinessId", pTrace->X_B3_BusinessId));
		req.m_headers.emplace(std::make_pair("X_B3_TraceId", pTrace->X_B3_TraceId));
		req.m_headers.emplace(std::make_pair("X_B3_SpanId", pTrace->X_B3_SpanId));
		req.m_headers.emplace(std::make_pair("X_B3_ParentSpanId", pTrace->X_B3_ParentSpanId));
		req.m_headers.emplace(std::make_pair("X_B3_Timestamp", pTrace->X_B3_Timestamp));
		
	}

	//set timeout
	m_iCurlTimeout = req.m_timeOut;

	CHTTPClient::HttpResponse g_Response;
	string url = req.m_url + "?" + param;
	if(req.m_bTransCode){
		if(req.m_printDbg)
			m_oLog("url转码 GBK=>UTF-8");
		ConvertGBKToUtf8(url);
	}
	bool isSuccess = Get(url, req.m_headers, g_Response);
	//转码
	if(req.m_bTransCode){
		if(req.m_printDbg)
			m_oLog("responseData转码 UTF-8=>GBK");
		ConvertUtf8ToGBK(g_Response.strBody);
	}

	if(req.m_printDbg){	
		std::string msg = "是否是https请求:";
		msg.append(m_bHTTPS ? "true" : "false");
		m_oLog(msg.c_str());
	}

	//处理响应值
	ret.m_sysCode = g_Response.iCode;
	ret.m_resultData = g_Response.strBody;
	if(isSuccess == false || (g_Response.iCode != 200 && g_Response.iCode != 201)){
		ret.m_errMsg = g_Response.strBody;
		char errMsg[1024] = {0};
		_snprintf(errMsg, 1023, "http请求报错,错误码:%d", g_Response.iCode);
		m_oLog(errMsg);
		return false;
	}
	else
	{
		if(req.m_printDbg)
			m_oLog("http请求成功,开始解析json");
		try
		{
			Json::Value root;
			Json::Reader reader;
			reader.parse(g_Response.strBody,root,false);
			if(root.isMember("code") && root.isMember("message"))
			{
				ret.m_userCode = root["code"].asString();
				ret.m_errMsg = root["message"].asString();
				return ret.Parse(g_Response.strBody);

			}
			else
			{
				char errMsg[1024] = {0};
				_snprintf(errMsg, 1023, LOG_ERROR_RESPONSE_FORMAT_FAILTURE_MSG, g_Response.strBody.c_str());

				ret.m_userCode = "0";
				ret.m_errMsg = "Unexpected format of stupid previous assuption!";
				return true;
			}
		}
		catch(...){
			m_oLog(LOG_ERROR_PARSE_JSON_FAILTURE_MSG);
			return false;
		}
	}

}
//add by cfq
const bool CHTTPClient::Post(CHTTPReq &req, CHTTPRet &ret, HttpClientTraceLink* pTrace){

	if(!req.m_url.empty()){
		if(req.m_printDbg){
			char *url = new char[req.m_url.length() + 1];
			memset(url, 0, req.m_url.length() + 1);
			_snprintf(url, req.m_url.length(), "%s", req.m_url.c_str());
			m_oLog(url);
			delete[] url;
		}
	}
	else{
		m_oLog(LOG_ERROR_PATH_NULL_MSG);
		return false;
	}

	std::string request;
	try
	{
		request= req.ToJson();
	}
	catch (...)
	{
		m_oLog(LOG_ERROR_GET_JSON_FAILTURE_MSG);
	}
	//转码
	if(req.m_bTransCode){
		if(req.m_printDbg){
			m_oLog("url转码 GBK=>UTF-8");
		}
		ConvertGBKToUtf8(request);
	}
	if(req.m_printDbg){
		std:string msg = "strPostDate:";
		msg.append(request);
		m_oLog(msg.c_str());
	}

	if(req.m_headers.empty()){
		if(req.m_printDbg){
			m_oLog("没有指定请求头内容，使用默认值Content-Type=application/json");
		}
		req.m_headers.emplace(std::make_pair("Content-Type", "application/json"));
	}
	if (req.m_withToken && g_tokenCall != NULL)
	{
		std::string channelId = "";
		std::string token = "";
		std::string terminalno = "";
		std::string reserve1 = "";
		g_tokenCall(channelId, token, terminalno, reserve1);
		if (channelId.length() != 0 && token.length() != 0)
		{
			req.m_headers.emplace(std::make_pair("channelId", channelId));
			req.m_headers.emplace(std::make_pair("token", token));
			req.m_headers.emplace(std::make_pair("terminalno", terminalno));
			string out = "channelId:" + channelId + ", token:" + token;
			if (req.m_printDbg)
				m_oLog(out.c_str());
		}
		
	}

	if (pTrace != NULL
		&& strlen(pTrace->X_B3_BusinessId) > 0
		&& strlen(pTrace->X_B3_TraceId) > 0
		&& strlen(pTrace->X_B3_SpanId) > 0
		&& strlen(pTrace->X_B3_ParentSpanId) > 0
		&& strlen(pTrace->X_B3_Timestamp) > 0)
	{
		req.m_headers.emplace(std::make_pair("X_B3_BusinessId", pTrace->X_B3_BusinessId));
		req.m_headers.emplace(std::make_pair("X_B3_TraceId", pTrace->X_B3_TraceId));
		req.m_headers.emplace(std::make_pair("X_B3_SpanId", pTrace->X_B3_SpanId));
		req.m_headers.emplace(std::make_pair("X_B3_ParentSpanId", pTrace->X_B3_ParentSpanId));
		req.m_headers.emplace(std::make_pair("X_B3_Timestamp", pTrace->X_B3_Timestamp));
	}

	//set timeout
	m_iCurlTimeout = req.m_timeOut;

	CHTTPClient::HttpResponse g_Response;
	bool isSuccess = Post(req.m_url, req.m_headers, request, g_Response);
	//转码
	if(req.m_bTransCode){
		if(req.m_printDbg){
			m_oLog("url转码 GBK=>UTF-8");
		}
		ConvertUtf8ToGBK(g_Response.strBody);
	}

	if(req.m_printDbg){	
		std::string msg = "是否是https请求:";
		msg.append(m_bHTTPS ? "true" : "false");
		m_oLog(msg.c_str());
	}

	//处理响应值
	ret.m_sysCode = g_Response.iCode;
	ret.m_resultData = g_Response.strBody;
	if(isSuccess == false || (g_Response.iCode != 200 && g_Response.iCode != 201)){
		ret.m_errMsg = g_Response.strBody;
		char errMsg[1024] = {0};
		_snprintf(errMsg, 1023, "http请求报错,错误码:%d", g_Response.iCode);
		m_oLog(errMsg);
		return false;
	}
	else
	{
		if(req.m_printDbg){
			m_oLog("http请求成功,开始解析json");
		}
		try
		{
			Json::Value root;
			Json::Reader reader;
			reader.parse(g_Response.strBody,root,false);
			if(root.isMember("code") && root.isMember("message"))
			{
				ret.m_userCode = root["code"].asString();
				ret.m_errMsg = root["message"].asString();
				return ret.Parse(g_Response.strBody);

			}
			else
			{
				char errMsg[1024] = {0};
				_snprintf(errMsg, 1023, LOG_ERROR_RESPONSE_FORMAT_FAILTURE_MSG, g_Response.strBody.c_str());

				ret.m_userCode = "0";
				ret.m_errMsg = "Unexpected format of stupid previous assuption!";
				return true;
			}
		}
		catch(...){
			m_oLog(LOG_ERROR_PARSE_JSON_FAILTURE_MSG);
			return false;
		}
	}
}

// CURL DEBUG INFO CALLBACKS

#ifdef DEBUG_CURL
void CHTTPClient::SetCurlTraceLogDirectory(const std::string& strPath)
{
   s_strCurlTraceLogDirectory = strPath;

   if (!s_strCurlTraceLogDirectory.empty()
#ifdef WINDOWS
      && s_strCurlTraceLogDirectory.at(s_strCurlTraceLogDirectory.length() - 1) != '\\')
   {
      s_strCurlTraceLogDirectory += '\\';
   }
#else
      && s_strCurlTraceLogDirectory.at(s_strCurlTraceLogDirectory.length() - 1) != '/')
   {
      s_strCurlTraceLogDirectory += '/';
   }
#endif
}

int CHTTPClient::DebugCallback(CURL* curl, curl_infotype curl_info_type, char* pszTrace, size_t usSize, void* pFile)
{
   std::string strText;
   std::string strTrace(pszTrace, usSize);

   switch (curl_info_type)
   {
   case CURLINFO_TEXT:
      strText = "# Information : ";
      break;
   case CURLINFO_HEADER_OUT:
      strText = "-> Sending header : ";
      break;
   case CURLINFO_DATA_OUT:
      strText = "-> Sending data : ";
      break;
   case CURLINFO_SSL_DATA_OUT:
      strText = "-> Sending SSL data : ";
      break;
   case CURLINFO_HEADER_IN:
      strText = "<- Receiving header : ";
      break;
   case CURLINFO_DATA_IN:
      strText = "<- Receiving unencrypted data : ";
      break;
   case CURLINFO_SSL_DATA_IN:
      strText = "<- Receiving SSL data : ";
      break;
   default:
      break;
   }

   std::ofstream* pofTraceFile = reinterpret_cast<std::ofstream*>(pFile);
   if (pofTraceFile == nullptr)
   {
      std::cout << "[DEBUG] cURL debug log [" << curl_info_type << "]: " << " - " << strTrace;
   }
   else
   {
      (*pofTraceFile) << strText << strTrace;
   }

   return 0;
}

void CHTTPClient::StartCurlDebug() const
{
   if (!m_ofFileCurlTrace.is_open())
   {
      curl_easy_setopt(m_pCurlSession, CURLOPT_VERBOSE, 1L);
      curl_easy_setopt(m_pCurlSession, CURLOPT_DEBUGFUNCTION, DebugCallback);

      std::string strFileCurlTraceFullName(s_strCurlTraceLogDirectory);
      if (!strFileCurlTraceFullName.empty())
      {
         char szDate[32];
         memset(szDate, 0, 32);
         time_t tNow; time(&tNow);
         // new trace file for each hour
         strftime(szDate, 32, "%Y%m%d_%H", localtime(&tNow));
         strFileCurlTraceFullName += "TraceLog_";
         strFileCurlTraceFullName += szDate;
         strFileCurlTraceFullName += ".txt";

         m_ofFileCurlTrace.open(strFileCurlTraceFullName, std::ifstream::app | std::ifstream::binary);

         if (m_ofFileCurlTrace)
            curl_easy_setopt(m_pCurlSession, CURLOPT_DEBUGDATA, &m_ofFileCurlTrace);
      }
   }
}

void CHTTPClient::EndCurlDebug() const
{
   if (m_ofFileCurlTrace && m_ofFileCurlTrace.is_open())
   {
      m_ofFileCurlTrace << "###########################################" << std::endl;
      m_ofFileCurlTrace.close();
   }
}
#endif