在VS2010中使用WinHttp和Java搭建的Web平台通信时出现问题

[CoderAndClimber]

在VS2010中通过WinHttp和Java搭建的Web平台通信时出现一个很怪异的问题：当我直接建立一个win32 console的工程时，进行通信没有问题，但当我把原来代码放在一个新建的头文件中时，然后将这个头文件添加入MFC工程，然后在所需要这个头文件的地方包含这个头文件，编译时出现了以下问题：错误error C2371: “HTTP_VERSION_INFO”: 重定义；不同的基类型 c:\program files (x86)\microsoft sdks\windows\v7.0a\include\winhttp.h ，错误error C2371: “HTTP_VERSION_INFO”: 重定义；不同的基类型 c:\program files (x86)\microsoft sdks\windows\v7.0a\include\winhttp.h ，错误error C2371: “URL_COMPONENTS”: 重定义；不同的基类型 c:\program files (x86)\microsoft sdks\windows\v7.0a\include\winhttp.h 160，错误error C2371: “HTTP_VERSION_INFO”: 重定义；不同的基类型 c:\program files (x86)\microsoft sdks\windows\v7.0a\include\winhttp.h 等问题，不知是何原因？
代码如下：

#include "stdafx.h"
#include <afx.h>
#define USE_WINHTTP //Comment this line to user wininet.
#ifdef USE_WINHTTP
#include <winhttp.h>
#pragma comment(lib, "winhttp.lib")
#else
#include <wininet.h>
#pragma comment(lib, "wininet.lib")
#endif

#include <vector>

#define BUF_SIZE (1024)

class CrackedUrl 
{
	int m_scheme;
	CStringW m_host;
	int m_port;
	CStringW m_path;
public:
	CrackedUrl(LPCWSTR url)
	{
		URL_COMPONENTS uc = { 0};
		uc.dwStructSize = sizeof(uc);				
		const DWORD BUF_LEN = 256;

		WCHAR host[BUF_LEN];
		uc.lpszHostName = host;
		uc.dwHostNameLength = BUF_LEN;			
		WCHAR path[BUF_LEN];
		uc.lpszUrlPath = path;
		uc.dwUrlPathLength = BUF_LEN;			
		WCHAR extra[BUF_LEN];
		uc.lpszExtraInfo = extra;
		uc.dwExtraInfoLength = BUF_LEN;
#ifdef USE_WINHTTP
		if (!WinHttpCrackUrl(url, 0, ICU_ESCAPE, &uc)) {
			printf("Error:WinHttpCrackUrl failed!\n");
		}				
#else
		if (!InternetCrackUrl(url, 0, ICU_ESCAPE, &uc)) {
			printf("Error:InternetCrackUrl failed!\n");
		}
#endif
		m_scheme = uc.nScheme;
		m_host = host;
		m_port = uc.nPort;
		m_path = path;
	}
	int GetScheme() const
	{
		return m_scheme;
	}	
	LPCWSTR GetHostName() const
	{
		return m_host;
	}
	int GetPort() const
	{
		return m_port;
	}

	LPCWSTR GetPath() const
	{
		return m_path;
	}
	static CStringA UrlEncode(const char* p)
	{
		if (p == 0) 		
			return CStringA();
		CStringA buf;
		for (;;) 
		{
			int ch = (BYTE) (*(p++));
			if (ch == '\0')			
				break;			
			if (isalnum(ch) || ch == '_' || ch == '-' || ch == '.') 
				buf += (char)ch;			
			else if (ch == ' ') 
				buf += '+';			
			else 
			{
				char c[16];
				wsprintfA(c, "%%%02X", ch);
				buf += c;
			}
		}
		return buf;
	}
};


HINTERNET OpenSession(LPCWSTR userAgent = 0)
{
#ifdef USE_WINHTTP
	return WinHttpOpen(userAgent, NULL, NULL, NULL, NULL);;
#else
	return InternetOpen(userAgent, INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
#endif
}

HINTERNET Connect(HINTERNET hSession, LPCWSTR serverAddr, int portNo)
{
#ifdef USE_WINHTTP
	return WinHttpConnect(hSession, serverAddr, (INTERNET_PORT) portNo, 0);
#else
	return InternetConnect(hSession, serverAddr, portNo, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 0);
#endif
}

HINTERNET OpenRequest(HINTERNET hConnect, LPCWSTR verb, LPCWSTR objectName, int scheme)
{
	DWORD flags = 0;
#ifdef USE_WINHTTP
	if (scheme == INTERNET_SCHEME_HTTPS) {
		flags |= WINHTTP_FLAG_SECURE;
	}
	return WinHttpOpenRequest(hConnect, verb, objectName, NULL, NULL, NULL, flags);
#else
	if (scheme == INTERNET_SCHEME_HTTPS) {
		flags |= INTERNET_FLAG_SECURE;
	}
	return HttpOpenRequest(hConnect, verb, objectName, NULL, NULL, NULL, flags, 0);
#endif
}
BOOL AddRequestHeaders(HINTERNET hRequest, LPCWSTR header)
{
	SIZE_T len = lstrlenW(header);
#ifdef USE_WINHTTP
	return WinHttpAddRequestHeaders(hRequest, header, DWORD(len), WINHTTP_ADDREQ_FLAG_ADD);
#else
	return HttpAddRequestHeaders(hRequest, header, DWORD(len), HTTP_ADDREQ_FLAG_ADD);
#endif
}
BOOL SendRequest(HINTERNET hRequest, const void* body, DWORD size)
{
#ifdef USE_WINHTTP
	return WinHttpSendRequest(hRequest, 0, 0, const_cast<void*>(body), size, size, 0);
#else
	return HttpSendRequest(hRequest, 0, 0, const_cast<void*>(body), size);
#endif
}
BOOL EndRequest(HINTERNET hRequest)
{
#ifdef USE_WINHTTP
	return WinHttpReceiveResponse(hRequest, 0);
#else
	// if you use HttpSendRequestEx to send request then use HttpEndRequest in here!
	return TRUE;
#endif
}
BOOL QueryInfo(HINTERNET hRequest, int queryId, char* szBuf, DWORD* pdwSize)
{
#ifdef USE_WINHTTP
	return WinHttpQueryHeaders(hRequest, (DWORD) queryId, 0, szBuf, pdwSize, 0);
#else
	return HttpQueryInfo(hRequest, queryId, szBuf, pdwSize, 0);
#endif
}
BOOL ReadData(HINTERNET hRequest, void* buffer, DWORD length, DWORD* cbRead)
{
#ifdef USE_WINHTTP
	return WinHttpReadData(hRequest, buffer, length, cbRead);
#else
	return InternetReadFile(hRequest, buffer, length, cbRead);
#endif
}		
void CloseInternetHandle(HINTERNET hInternet)
{
	if (hInternet)
	{
#ifdef USE_WINHTTP
		WinHttpCloseHandle(hInternet);
#else
		InternetCloseHandle(hInternet);
#endif
	}
}bool HttpQuest(const CString &strUrl,const CString &strHeader,const CString &strPost,CString &strReturn,BOOL bPost)
{
	HINTERNET hSession = 0;
	HINTERNET hConnect = 0;
	HINTERNET hRequest = 0;

	LPCWSTR Url=strUrl.AllocSysString();
	// Test data
	CrackedUrl crackedUrl(Url);
	// Open session.
	hSession = OpenSession(L"User Agent");
	if (hSession == NULL) 
	{
		printf("Error:Open session!\n");
		return -1;
	}
	// Connect.
	hConnect = Connect(hSession, crackedUrl.GetHostName(), crackedUrl.GetPort());
	if (hConnect == NULL) 
	{
		printf("Error:Connect failed!\n");
		return -1;
	}
	// Open request.
	LPCWSTR strPostOrGet;
	if (bPost)
	{
		CString strTmp("POST");
		strPostOrGet=strTmp.AllocSysString();
	}		
	else
	{
		CString strTmp("GET");
		strPostOrGet=strTmp.AllocSysString();
	}
	hRequest = OpenRequest(hConnect,strPostOrGet,crackedUrl.GetPath(), crackedUrl.GetScheme());
	if (hRequest == NULL) 
	{
		printf("Error:OpenRequest failed!\n");
		return -1;
	}
	// Add request header.	
	LPCWSTR strHeaderW = strHeader.AllocSysString();
	if (!AddRequestHeaders(hRequest, strHeaderW)) 
	{
		printf("Error:AddRequestHeaders failed!\n");
		return -1;
	}
	// Send post data.
	CStringA strPostData(strPost);
	if (!SendRequest(hRequest, (const char*)strPostData, strPostData.GetLength())) 
	{
		printf("Error:SendRequest failed!\n");
		return -1;
	}
	// End request
	if (!EndRequest(hRequest)) 
	{
		printf("Error:EndRequest failed!\n");
		return -1;
	}
	char szBuf[BUF_SIZE];
	DWORD dwSize = 0;
	szBuf[0] = 0;
	// Query header info.
#ifdef USE_WINHTTP
	int contextLengthId = WINHTTP_QUERY_CONTENT_LENGTH;
	int statusCodeId = WINHTTP_QUERY_STATUS_CODE;
	int statusTextId = WINHTTP_QUERY_STATUS_TEXT;
#else
	int contextLengthId = HTTP_QUERY_CONTENT_LENGTH;
	int statusCodeId = HTTP_QUERY_STATUS_CODE;
	int statusTextId = HTTP_QUERY_STATUS_TEXT;
#endif
	dwSize = BUF_SIZE;
	if (QueryInfo(hRequest, contextLengthId, szBuf, &dwSize)) 
	{
		szBuf[dwSize] = 0;
		printf("Content length:[%s]\n", szBuf);
	}
	dwSize = BUF_SIZE;
	if (QueryInfo(hRequest, statusCodeId, szBuf, &dwSize))
	{
		szBuf[dwSize] = 0;
		printf("Status code:[%s]\n", szBuf);
	}
	dwSize = BUF_SIZE;
	if (QueryInfo(hRequest, statusTextId, szBuf, &dwSize)) 
	{
		szBuf[dwSize] = 0;
		printf("Status text:[%s]\n", szBuf);
	}
	// read data.
	for (;;) 
	{
		dwSize = BUF_SIZE;
		if (ReadData(hRequest, szBuf, dwSize, &dwSize) == FALSE)
			break;		
		if (dwSize <= 0) 
			break;		
		szBuf[dwSize] = 0;
		printf("%s\n", szBuf); 
		strReturn=(CString)szBuf;
	}
	CloseInternetHandle(hRequest);
	CloseInternetHandle(hConnect);
	CloseInternetHandle(hSession);
}

[oyljerry]

头文件包含冲突了。 或重复包含了，检查一下你所有h文件

[encoderlee]

#include "stdafx.h" 预编译文件的包含语句应该放到cpp文件里吧。 另外头文件第一行写#pragma once试试

[CoderAndClimber]

问题已经解决了，不是#pragma once的问题，而是原来程序中包含的很多头文件与winnet.h及winhttp.h头文件相冲突了，解决方法是在网上下载了一个处理过得winHttp.h，包含一下就可以了