WinInet方式实现Get Post 有的网站能取到源码，有的却只能取到一部分，甚至返回bad request ，但不知道哪里出了问题

曼珠u沙华 2016-06-05 08:11:34

WinInet方式实现Get Post ，有的网站能取到源码，有的却只能取到一部分，甚至返回bad request ，但不知道哪里出了问题，求大神指导。我是UNICODE程序。只能取一部分代码的情况下， InternetReadFile(hHttpRequest, pbtBuf, 1024, &nCount);只读取一次，第二次读取，pbtBuf里还是上一次读取的内容，nCount变成了0.如果我把Buf申请足够大的内存，可以读到所有源码，但是读到的源码是有问题的。而访问有的网站就不会出现这种问题。求大神指导，拜托啦！苦恼了我两天了，也没发现问题。
出问题的时候，HttpSendRequest 调用失败，错误码是12150



char *CWinInetOperate::WebVisit(CString strUrl, CString strVisitType, char *pcSubmitData, CString strSubmitCookies, CString strSubjoinProtocolHeader,

		BOOL bNoRedirect, CString strProxyAddress )

{

		CStringOperate c_StrOperate;

		CString strTempUrl = strUrl;

		BOOL bHttps = FALSE;

		strTempUrl.MakeLower();

		if (strTempUrl.Left(8) == L"https://")

				bHttps = TRUE;

		CString strUserAgent;

		if (strSubjoinProtocolHeader.Find(L"User-Agent: ") != -1)

				strUserAgent = c_StrOperate.GetStringMiddle(strSubjoinProtocolHeader, L"User-Agent: ", L"\r\n");

		else

				strUserAgent = L"Mozilla/4.0 (compatible; MSIE 9.0; Windows NT 6.1)";

		HINTERNET hInternet;

		if (strProxyAddress.IsEmpty())

				hInternet = InternetOpen(strUserAgent, INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0);

		else

		{

				if (bHttps)

						hInternet = InternetOpen(strUserAgent, INTERNET_OPEN_TYPE_PROXY, strProxyAddress, NULL, 0);

				else

						hInternet = InternetOpen(strUserAgent, INTERNET_OPEN_TYPE_DIRECT, L"http=" + strProxyAddress, NULL, 0);

		}

		if (!hInternet)

				return NULL;

		HINTERNET hInternetConnect;

		hInternetConnect = InternetConnect(hInternet, GetDomain(strUrl), GetPort(strUrl), NULL, NULL, INTERNET_SERVICE_HTTP, 0, 0);

		if (!hInternetConnect)

		{

				InternetCloseHandle(hInternetConnect);

				InternetCloseHandle(hInternet);

				return NULL;

		}

		int nRequestSign = INTERNET_FLAG_RELOAD | INTERNET_COOKIE_THIRD_PARTY;

		if (strSubmitCookies.IsEmpty() == FALSE)

				nRequestSign |= INTERNET_FLAG_NO_COOKIES;

		if (bNoRedirect)

				nRequestSign |= INTERNET_FLAG_NO_AUTO_REDIRECT;

		if (bHttps)

				nRequestSign |= INTERNET_FLAG_SECURE;

		else

				nRequestSign |= INTERNET_FLAG_IGNORE_REDIRECT_TO_HTTPS;

		PCTSTR rgpszAcceptTypes[] = {L"text/*",NULL};

		HINTERNET hHttpRequest = HttpOpenRequest(hInternetConnect, strVisitType, GetPageAddress(strUrl), L"HTTP/1.1", NULL,NULL, nRequestSign, 0);

		if (!hHttpRequest)

		{

				InternetCloseHandle(hInternet);

				InternetCloseHandle(hInternetConnect);

				InternetCloseHandle(hHttpRequest);

				return NULL;

		}



		if (strSubjoinProtocolHeader.IsEmpty())

				strSubjoinProtocolHeader = L"Accept: */*";

		else

		{

				if (strSubjoinProtocolHeader.Find(L"Accept:") == -1)

						strSubjoinProtocolHeader = strSubjoinProtocolHeader + L"\r\n" + L"Accept: */*";

		}

		if (strSubjoinProtocolHeader.Find(L"Referer:") == -1)

				strSubjoinProtocolHeader = strSubjoinProtocolHeader + L"\r\n" + L"Referer: " + strUrl;

		if (strSubjoinProtocolHeader.Find(L"Accept-Language:") == -1)

				strSubjoinProtocolHeader = strSubjoinProtocolHeader +L"\r\n" +L"Accept-Language: zh-cn";

		if (strSubjoinProtocolHeader.Find(L"Content-Type:") == -1)

				strSubjoinProtocolHeader = strSubjoinProtocolHeader +L"\r\n"+ L"Content-Type: application/x-www-form-urlencoded";

		if (strSubmitCookies.IsEmpty() == FALSE)

				strSubjoinProtocolHeader = strSubjoinProtocolHeader + L"\r\n" + L"Cookie: " + strSubmitCookies;

		CString strTempVisitType = strVisitType;

		strTempVisitType.MakeLower();

		if (strTempVisitType == L"get")

				HttpSendRequest(hHttpRequest, strSubjoinProtocolHeader, strSubjoinProtocolHeader.GetLength(), NULL, 0);

		else

		{

				DWORD dwLength;

				if (pcSubmitData == NULL)

						dwLength = 0;

				else

						dwLength = strlen(pcSubmitData) + 1;

				HttpSendRequest(hHttpRequest, strSubjoinProtocolHeader, strSubjoinProtocolHeader.GetLength(), pcSubmitData, dwLength);

		}

				

		DWORD nCount;

		byte *pbtBuf = new byte[1024];

		CByteArray btaryWebCode;

		memset(pbtBuf, 0, 1024);

		BOOL bFlag;

		do

		{

				bFlag = InternetReadFile(hHttpRequest, pbtBuf, 1024, &nCount);

				for (DWORD i = 0; i < nCount; i++)

						btaryWebCode.Add(pbtBuf[i]);

		} while (nCount);

		nCount = btaryWebCode.GetCount();

		char *pcWebCode = new char[nCount+1];

		memset(pcWebCode, 0, nCount + 1);

		for (DWORD i = 0; i < nCount; i++)

				pcWebCode[i] = btaryWebCode.GetAt(i);

	/*	CFile file;

		file.Open(L"C:\\Users\\Administrator.USER-20150718LB\\Desktop\\1.txt",CFile::modeReadWrite);

		file.Write(pcWebCode,nCount);

		file.Close();*/



		InternetCloseHandle(hInternet);

		InternetCloseHandle(hInternetConnect);

		InternetCloseHandle(hHttpRequest);

		return pcWebCode;

}