HttpSendRequest向服务端发送数据,构造请求http头

使用 WinInte API 发送 HTTP 请求

//向http://192.168.8.72:8080/oss/client/analysis.g发送数据.

LPCTSTR lpURL = _T("http://192.168.8.72:8080");
if (!::InternetCheckConnection(lpURL, FLAG_ICC_FORCE_CONNECTION, 0))
    return;

HINTERNET hOpen = ::InternetOpen(_T("client.exe"), INTERNET_OPEN_TYPE_PRECONFIG_WITH_NO_AUTOPROXY, NULL, NULL, 0);
if (NULL == hOpen)
    return;

LPCTSTR lpDomainName = _T("192.168.8.72"); // 注意不能带 http://
// 该函数第3个参数不能是80,而应该是8080
HINTERNET hConnect = ::InternetConnect(hOpen, lpDomainName, 8080, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 0);
if (NULL == hConnect)
    goto FUN_END2;

// 注意第3个参数的个数,最前面要有"/",它同lpURL拼接成http://192.168.8.72:8080/oss/client/analysis.g
LPCTSTR szAccept[] = {_T("*/*"), NULL};
DWORD dwFlag = INTERNET_FLAG_NO_CACHE_WRITE;
HINTERNET hOpenRequest = ::HttpOpenRequest(hConnect, _T("POST"), _T("/oss/client/analysis.g"),
    _T("HTTP/1.1"), lpURL, szAccept, dwFlag, 0);
if (NULL == hOpenRequest)
    goto FUN_END1;

BOOL bRet;

TCHAR szPostData[] = _T("<Root>this is test data from client</Root>");
char utf8PostData[BUF_LEN] = {0};
strcpy(utf8PostData, dataConvert.TCharToUTF8(szPostData));


// 外发的header.
// 注意,这里的头部很容易错.
// 每个字符串结尾不能带诸如 "/r/n","\r\n"这样的结尾,最后一个字符串必须要带两个"\r\n",也就是"\r\n\r\n".
// 有些网友写的示例中,每个字符串后都带有诸如 "/r/n"或"\r\n"这样的结尾,但在我的测试中发现是错误的,
// HttpQueryInfo返回的状态码总是400,意思是"错误请求 — 请求中有语法问题，或不能满足请求",估计这跟
// 具体的web服务有关.但有个简单的方式处理该问题,可使用chrome浏览器访问某个url(这里是http://192.168.8.72:8080/oss/client/// analysis.g),然后使用抓包工具Wireshark抓取http包,分析request和response头.然后再使用你的程序请求你的url,一样抓包,然后对// 比这两次抓取的数据包中http头有什么区别,修改你的代码,不断尝试,直到成功.
TCHAR headerLanguage[] = _T("Accept-Language: zh-CN,zh;q=0.8");
TCHAR headerEncoding[] = _T("Accept-Encoding: gzip,deflate,sdch";);
TCHAR headerCharset[] = _T("Accept-Charset:GBK,utf-8;q=0.7,*;q=0.3");
TCHAR headerContentType[] = _T("Content-Type: text/xml";);
TCHAR headerHost[] = _T("Host: 192.168.8.72:8080";);
TCHAR headerOrigin[] = _T("Origin: http://192.168.8.72:8080";);
TCHAR headerReferer[] = _T("Referer: http://192.168.8.72:8080/oss/client/create.g");
TCHAR headerContentLength[64];
_stprintf(headerContentLength, _T("Content-Length: %d\r\n\r\n"), strlen(utf8PostData)); //注意结尾有两个\r\n

// 添加header 信息
bRet = HttpAddRequestHeaders(hOpenRequest, headerLanguage,    -1, HTTP_ADDREQ_FLAG_ADD|HTTP_ADDREQ_FLAG_REPLACE);
bRet = HttpAddRequestHeaders(hOpenRequest, headerEncoding,    -1, HTTP_ADDREQ_FLAG_ADD|HTTP_ADDREQ_FLAG_REPLACE);
bRet = HttpAddRequestHeaders(hOpenRequest, headerCharset,    -1, HTTP_ADDREQ_FLAG_ADD|HTTP_ADDREQ_FLAG_REPLACE);
bRet = HttpAddRequestHeaders(hOpenRequest, headerContentType, -1, HTTP_ADDREQ_FLAG_ADD|HTTP_ADDREQ_FLAG_REPLACE);
bRet = HttpAddRequestHeaders(hOpenRequest, headerHost, -1, HTTP_ADDREQ_FLAG_ADD|HTTP_ADDREQ_FLAG_REPLACE);
bRet = HttpAddRequestHeaders(hOpenRequest, headerOrigin, -1, HTTP_ADDREQ_FLAG_ADD|HTTP_ADDREQ_FLAG_REPLACE);
bRet = HttpAddRequestHeaders(hOpenRequest, headerReferer, -1, HTTP_ADDREQ_FLAG_ADD|HTTP_ADDREQ_FLAG_REPLACE);
bRet = HttpAddRequestHeaders(hOpenRequest, headerContentLength, -1, HTTP_ADDREQ_FLAG_ADD|HTTP_ADDREQ_FLAG_REPLACE);

bRet = ::HttpSendRequest(hOpenRequest, NULL, 0, utf8PostData, strlen(utf8PostData));
DWORD dwErr = ::GetLastError();
if (!bRet)  goto FUN_END1;

TCHAR szBuff[BUF_LEN] = {0};
DWORD dwBuffSize = BUF_LEN*sizeof(szBuff);
bRet = ::HttpQueryInfo(hOpenRequest, HTTP_QUERY_STATUS_CODE, (LPVOID)szBuff, &dwBuffSize, NULL);

//Reference to http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
int nStatusCode = _tstoi(szBuff);
if (nStatusCode<200 || 206<nStatusCode)
    bRet = FALSE;

if (bRet)
{
    TCHAR szBuff[BUF_LEN_1024+1] = {0};
    DWORD dwBuffSize = BUF_LEN_1024*sizeof(szBuff);
    bRet = ::HttpQueryInfo(hOpenRequest, HTTP_QUERY_CONTENT_LENGTH, (LPVOID)szBuff, &dwBuffSize, NULL);

    memset(szBuff, 0, sizeof(szBuff));
    dwBuffSize = BUF_LEN_1024*sizeof(szBuff);
    bRet = ::HttpQueryInfo(hOpenRequest, HTTP_QUERY_DATE, (LPVOID)szBuff, &dwBuffSize, NULL);

    memset(szBuff, 0, sizeof(szBuff));
    dwBuffSize = BUF_LEN_1024*sizeof(szBuff);
    bRet = ::HttpQueryInfo(hOpenRequest, HTTP_QUERY_SERVER, (LPVOID)szBuff, &dwBuffSize, NULL);

    memset(szBuff, 0, sizeof(szBuff));
    dwBuffSize = BUF_LEN_1024*sizeof(szBuff);
    bRet = ::InternetReadFile(hOpenRequest, szBuff, dwBuffSize, &dwBuffSize);
    if (bRet)
    {
        // ...
    }
}
InternetCloseHandle(hOpenRequest);

FUN_END1:
::InternetCloseHandle(hConnect);

FUN_END2:
::InternetCloseHandle(hOpen);