CURL自动解压缩有时失败，请问怎么解决？

[QQ551780977]

我在测试WWW.QQ.COM时，发现有时候CURL自动解压缩失败，直接返回GZIP数据，那位知道怎么解决？谢谢！
我不想自己写代码来解压缩！

[QQ551780977]

上一个对CURL还没完成的C++封装类，希望能帮助到一些有需要的朋友。
注意，下面的代码会出现自动解压缩失败

#pragma once
#pragma comment(lib, "curl/libcurld.lib")
#include "curl/curl.h"
class CCurl
{

public:
	CCurl()
	{
		_Init();
	}
		//全局初始化，只能用于主线程
	static void GlobalInit()
	{
		curl_global_init(CURL_GLOBAL_ALL);
	}
		//全局资源清除，只能用于主线程
	static void GlobalCleanup()
	{
		curl_global_cleanup();
	}
	void Close()
	{
		if( _GetHandle() )
		{
			curl_easy_cleanup(m_pCurl);
			m_pCurl = NULL;
		}
		FreeHeaderListPtr();
		
	}
	//禁止重用
	void SetForbidReuse(bool Flags = false)
	{
		
		curl_easy_setopt(m_pCurl, CURLOPT_FORBID_REUSE, Flags);
	}
	//重新连接
	void SetFreshConnect(bool Flags = false)
	{
		curl_easy_setopt(m_pCurl, CURLOPT_FRESH_CONNECT, Flags);
	}
public:
	void HttpGet(const  char *Url = NULL)
	{
		if( NULL != Url)
			SetUrl(Url);
		SetCutomRequest("GET");
	}
	void RemoveHttpHeader(bool Flags = false)
	{
		curl_easy_setopt(m_pCurl, CURLOPT_HTTPGET, Flags);
	}
public:
	void SetUrl(const char *Url)
	{
		curl_easy_setopt(m_pCurl, CURLOPT_URL, Url);
	}
	void AddRequestHeader(const char *Header)
	{
		m_pHeader = curl_slist_append(m_pHeader, Header);
	}
	void SetRequestHeader()
	{
		if(m_pHeader)
			curl_easy_setopt(m_pCurl, CURLOPT_HTTPHEADER, m_pHeader);
	}
	void FreeHeaderListPtr()
	{
		if(m_pHeader)
		{
			curl_slist_free_all(m_pHeader);
		}
	}
public:
		//设置一个长整形数，作为最大延续多少秒。
	void SetTimeOut	(long Size = 0)
	{
		curl_easy_setopt(m_pCurl, CURLOPT_TIMEOUT, Size);
	}
	void SetConnectTimeOut(long Size = 0)
	{
		curl_easy_setopt(m_pCurl, CURLOPT_CONNECTTIMEOUT, Size);
	}
public:
	int Exec()
	{
		SetRequestHeader();
		int Code = curl_easy_perform(m_pCurl);
		return Code;
	}

public:
	double GetResultFileSize()
	{
		double Size = 0;
		curl_easy_getinfo(m_pCurl, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &Size);
		return Size;
	}
public:
	void SetCutomRequest(const char *RequestType = "GET")
	{
		curl_easy_setopt(m_pCurl, CURLOPT_CUSTOMREQUEST, RequestType);
	}
		//如果你想把一个头包含在输出中，设置这个选项为一个非零值。
	void SetOutHeader(bool Flags = true)
	{
		curl_easy_setopt(m_pCurl, CURLOPT_HEADER, Flags);
	}
		// 如果你不想在输出中包含body部分，设置这个选项为一个零值。
	void SetOutBody(bool Flags = true)
	{
		curl_easy_setopt(m_pCurl, CURLOPT_NOBODY, !Flags);
	}	
	void SetOnGzip(bool Flags = false)
	{
		if(Flags)
			curl_easy_setopt(m_pCurl, CURLOPT_ACCEPT_ENCODING, "gzip");

	}
	void SetTransferEncoding(bool Flags = false)
	{
		curl_easy_setopt(m_pCurl, CURLOPT_TRANSFER_ENCODING , Flags);
	}
		//传递一个你想指定的范围。它应该是"X-Y"格式，X或Y是被除外的。HTTP传送同样支持几个间隔，用逗句来分隔(X-Y,N-M)。
	void SetRange(const char *Str)
	{
		curl_easy_setopt(m_pCurl, CURLOPT_RANGE , Str);	//设置断点继传
	}
		//设置续传起始位置
	void SetResumeFrom(long Start = 0)
	{
		curl_easy_setopt(m_pCurl, CURLOPT_RESUME_FROM, Start);
	}
	//如果你不会PHP为CURL传输显示一个进程条，设置这个选项为一个非零值。
	void SetOnProgress (bool Flags = false)
	{
		curl_easy_setopt(m_pCurl, CURLOPT_NOPROGRESS, !Flags);
	}
public:		//设置HTTP头回调函数
	void SetHeaderCallFunction(void *UserPtr = NULL, void *Function = NULL)
	{
		if(Function)
		{
			curl_easy_setopt(m_pCurl, CURLOPT_HEADERFUNCTION, Function);
			curl_easy_setopt(m_pCurl, CURLOPT_HEADERDATA, UserPtr);
		}
		
	}
		//当有数据可写时调用function参数中的回调函数
	void SetWriteCallFunction(void *UserPtr = NULL, void *Function = NULL)
	{
		if(Function)
		{
			curl_easy_setopt(m_pCurl, CURLOPT_WRITEFUNCTION, Function);
			curl_easy_setopt(m_pCurl, CURLOPT_WRITEDATA, UserPtr);
		}
		
	}
		//设置进度回调函数
	void SetProgressCallFunction(void *UserPtr = NULL, void *Function = NULL)
	{
		if(Function)
		{
			curl_easy_setopt(m_pCurl, CURLOPT_NOPROGRESS, false);
			curl_easy_setopt(m_pCurl, CURLOPT_PROGRESSFUNCTION, Function);
			curl_easy_setopt(m_pCurl, CURLOPT_PROGRESSDATA, UserPtr);
		}
	}
	
public:
		//设置自动跳转
	void SetOnAutoReferer(bool Flags = false)
	{
		curl_easy_setopt(m_pCurl, CURLOPT_AUTOREFERER, Flags);
	}
		//如果你想CURL报告每一件意外的事情，设置这个选项为一个非零值。
	void SetOnVerbose(bool Flags = false)
	{
		curl_easy_setopt(m_pCurl, CURLOPT_VERBOSE, Flags);
	}
	
	void SetErrorBuffer(const char *Buf)
	{
		//curl_easy_setopt(m_pCurl, CURLOPT_ERRORBUFFER, Buf);
	}
	
	//多线程传输时设置FALSE是安全的
	void SetOnSignal(bool Flags = false)
	{
		curl_easy_setopt(m_pCurl, CURLOPT_NOSIGNAL, !Flags);	//设置线程安全
	}
	
	//如果你想在发生错误(HTTP代码返回大于等于300)时，不显示，设置这个选项为非零值。默认行为是返回一个正常页，忽略代码。
	void SetFailOnError(bool Flags = false)
	{
		curl_easy_setopt(m_pCurl, CURLOPT_FAILONERROR, Flags);
	}
public:
	//void GetVersion(); 

private:
	void _Init()
	{
		m_pHeader = NULL;
		m_pCurl = curl_easy_init();
		SetOnSignal(false);
		SetFailOnError(true);
	}
	
	bool _GetHandle()
	{
		if( m_pCurl )
		{
			return true;
		}
		else
		{
			return false;
		}
	}
	
private:
	CURL 		*m_pCurl;
	curl_slist	*m_pHeader;
};
size_t OnHeader(char *Buffer, size_t Size, size_t Nmemb, FILE *UserPtr)
{
	return 0;
}

size_t OnWriteData(char *Buffer, size_t Size, size_t Nmemb, FILE *UserPtr)
{
	if(UserPtr)
	{
		return fwrite(Buffer, Size, Nmemb, UserPtr);
	}
	else
		return Size * Nmemb;
}

size_t OnProgress(void *UserPtr, double DownTotal,	 double DownNow,
								 double UploadTotal, double UploadNow )
{
	printf("%g/%g\n",DownNow,DownTotal);
	return 0;
}
int main()
{

	const char *url = "http://www.qq.com";
	CCurl::GlobalInit();
	CCurl http;
	http.SetTimeOut(20);
	http.HttpGet(url);
	http.SetOnVerbose(true);
	http.SetOutHeader(false);
	http.SetOutBody(false);
	printf("\n%d\n\n",http.Exec());
	http.SetForbidReuse(true);

	
	http.AddRequestHeader("Cache-Control: no-cache");
	//http.AddRequestHeader("Accept-Encoding: gzip");
	http.AddRequestHeader("User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)");
	//http.SetTransferEncoding(false);
	http.SetOutHeader(false);
	http.SetOutBody(true);
	char filename[100] = {0};
	srand(time(0));
	sprintf(filename,"%d.html",rand()%1000);
	FILE *pfile = fopen(filename,"ab+");
	http.SetWriteCallFunction(pfile,OnWriteData);
	http.SetProgressCallFunction(NULL, OnProgress);
	printf("\n%d\n\n",http.Exec());
	fclose(pfile);
	http.SetForbidReuse(true);
	http.Close();

	CCurl::GlobalCleanup();

	return 0;
}