ce_http.cpp

windows mobile上与http服务器通信

#include "Wininet.h"
#include <initguid.h>
#include <connmgr.h>
#include <connmgr_proxy.h>

void HttpDownload(TCHAR * szServer, TCHAR * szObject)
{
	HINTERNET hConnect = InternetConnect(hSession,
								szServer,
								INTERNET_INVALID_PORT_NUMBER,
								L"",
								L"",
								INTERNET_SERVICE_HTTP,
								0,
								0);

	HINTERNET hHttpFile = HttpOpenRequest(hConnect,
								 L"GET",
								 szObject,
								 HTTP_VERSION,
								 NULL,
								 0,
								 INTERNET_FLAG_DONT_CACHE,
								 0) ;


	bool bSendRequest = HttpSendRequest(hHttpFile, NULL, 0, 0, 0);

	if(!bSendRequest)
	{
		InternetCloseHandle(hHttpFile);
		InternetCloseHandle(hConnect);
		InternetCloseHandle(hSession);

		delete [] pBufQuery;

		return NULL;
	}

	memset(pBufQuery, 0, 1024*sizeof(TCHAR));
	dwLengthBufQuery = 1024*sizeof(TCHAR);
	bQuery = HttpQueryInfo(hHttpFile,
						  HTTP_QUERY_CONTENT_LENGTH, 
						  pBufQuery, 
						  &dwLengthBufQuery,
						  NULL) ;

	DWORD dwFileLen = _wtoi(pBufQuery);//得到下载的大小

	delete [] pBufQuery;

	if(dwFileLen <= 0)
	{
		InternetCloseHandle(hHttpFile);
		InternetCloseHandle(hConnect);
		InternetCloseHandle(hSession);

		return NULL;
	}

	char * pRead = new char[dwFileLen+1];
	memset(pRead, 0, dwFileLen+1);

	DWORD dwRead;
	BOOL bRet = InternetReadFile(hHttpFile, pRead, dwFileLen, &dwRead);

	TCHAR * pContent = new TCHAR[dwFileLen+1];
	memset(pContent, 0, (dwFileLen+1)*2);
	MultiByteToWideChar(CP_UTF8, 0, pRead, strlen(pRead), pContent, dwFileLen);//全部转化成Unicode码处理

        //此处可对pContent进行操作
	delete []pRead;
	delete []pContent;
	
	InternetCloseHandle(hHttpFile);
	InternetCloseHandle(hConnect);
	InternetCloseHandle(hSession);

}