c语言实现携带XML数据HTTP请求，求指导

帅比小新 2011-10-17 10:30:28

vs2005中的c++代码，总体实现的是客户端向客户端发出httprequest，携带xml格式信息，服务端接收后返回，客户端再进行接收和解析。现在希望用c语言实现下面的代码。



CoInitialize(NULL);

CComPtr<IXMLHttpRequest> spHttp;

if (FAILED(spHttp.CoCreateInstance(__uuidof(XMLHTTPRequest))) || !spHttp)

{

	return -1;

}

CString strURL;

_variant_t varp(false);

_variant_t vusername(_T(""));

_variant_t vpassword(_T(""));

BSTR bstrResponse;

strURL.Format(_T("http://%s:%d/MessageService"), pszGateWayIP, usGatePort);

spHttp->open(_bstr_t("POST"), _bstr_t(strURL), varp, vusername, vpassword);

spHttp->send(_variant_t(_bstr_t(pszReqInfo)));

spHttp->get_responseText(&bstrResponse);

strReponseHttpBody = (LPCTSTR)_bstr_t(bstrResponse);

我在网上看了些c用socket发送http请求的帖子，自己写了一段，发过去之后服务端没有反应，请高手指正一下，如果连思路都不对的话，麻烦指教下思路。



WSADATA wsaData;

int err;

SOCKET serverConnGateSock;

struct sockaddr_in serverConnGateAddr;

char msgServerRecvFromGate[MSG_SIZE];

char msg_get_original[MSG_SIZE];

char len[30];



sprintf_s(len, 30, "%d", strlen(csRndRequestXML));



sprintf_s(msg_get_original, MSG_SIZE,

	"POST /MessageService HTTP/1.1\r\n"

	"Accept: */*"

	"Accept-Encoding: gzip, deflate"

	"Host: %s:%d\r\n"

	"Content-Length: %s"

	"Connection: Keep-Alive"

	"Cache-Control: no-cache"

	"\r\n\r\n"

	"%s"

	, gate_ip, gate_port, len, csRndRequestXML);



err = WSAStartup(MAKEWORD(2,2), &wsaData);

if (err != 0)

{

	printf("[ERROR] WSAStartup failed in SendRequest_Plain!\n");

	exit(0);

}



serverConnGateSock = socket(AF_INET, SOCK_STREAM, 0);

if (serverConnGateSock == INVALID_SOCKET)

{

	printf("[ERROR] socket() failed in SendRequest_Plain!\n");

	WSACleanup();

	return -1;

}



serverConnGateAddr.sin_family = AF_INET;

serverConnGateAddr.sin_port = htons(gate_port);

serverConnGateAddr.sin_addr.s_addr = inet_addr(gate_ip);

err = connect(serverConnGateSock, (struct sockaddr *)&serverConnGateAddr, sizeof(struct sockaddr));

if (INVALID_SOCKET == err)

{

	printf("[ERROR] connect() failed in SendRequest_Plain!\n");

	closesocket(serverConnGateSock);

	WSACleanup();

	return -2;

} else {

	printf("[conn] server conn gate success\n");

}



err = send(serverConnGateSock, msg_get_original, (int)strlen(msg_get_original), 0);

if (err >= 0)

{

	printf("[Success] send %d out!", err);

} else if (SOCKET_ERROR == err) {

	printf("[Error] send failed!");

}



err = recv(serverConnGateSock, msg_get_original, (int)strlen(msg_get_original), 0);

if (err == SOCKET_ERROR )

{

	printf("[ERROR] recv() failed in SendRequest_Plain!\n");

        //closesocket(serverConnGateSock);

        //WSACleanup();

        //return -4;

} else if (err > 0) {

	printf("[Success] recv() in SendRequest_Plain!\n\t[msgServerRecvFromGate]\n%s",msgServerRecvFromGate);

} else if (err == 0)

{

	printf("[ERROR] recv() failed, connect close\n");

}

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帅比小新 2011-10-17

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顶下。

帅比小新 2011-10-17

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[Quote=引用 1 楼 luciferisnotsatan 的回复:]

send后recv不到东西？
[/Quote]
对啊，服务器那边连反应都没有。不过如果用write函数，倒是可以显示 HTTP/1.1 200 OK。不过write是在unistd.h下的吧。莫非要用fwrite函数么？又拿不到socket的FILE*指针。

帅比小新 2011-10-17

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对了，具体的csRndRequestXML（发送过去请求携带的xml的信息）的内容如下：



csRequest[0] = '\0';

	strcat_s(csRequest, size, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n");

	strcat_s(csRequest, size, "<message>\r\n");

	strcat_s(csRequest, size, "<head>\r\n");

	strcat_s(csRequest, size, "<version>1.0</version>\r\n");

	strcat_s(csRequest, size, "<serviceType>OriginalService</serviceType>\r\n");

	strcat_s(csRequest, size, "</head>\r\n");

	strcat_s(csRequest, size, "<body>\r\n");

	strcat_s(csRequest, size, "<appId>");

	strcat_s(csRequest, size, app_id);

	strcat_s(csRequest, size, "</appId>\r\n");

	strcat_s(csRequest, size, "</body>\r\n");

	strcat_s(csRequest, size, "</message>\r\n");