libcurl 模拟登录cas网站问题，请大神们帮忙分析下

sinat_30784251 2017-07-02 01:03:03

我的开发环境是qt5.5+vs,用了一个libcurl库，模拟登录一个cas网站，谷歌浏览器抓包截图如下

代码如下



CURLcode res;

	CURL* curl = curl_easy_init();

	if (NULL == curl)

	{

		return CURLE_FAILED_INIT;

	}

	



	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, false);

	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, false);

	curl_easy_setopt(curl, CURLOPT_URL, "https://cas.gaoxiaobang.com/login");

	curl_easy_setopt(curl, CURLOPT_HEADER, TRUE);

	curl_easy_setopt(curl, CURLOPT_READFUNCTION, NULL);

	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, OnWriteData);

	curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&strResponse);

	curl_easy_setopt(curl, CURLOPT_COOKIEJAR, "cookie_open.txt");

	curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);

	curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 3);

	curl_easy_setopt(curl, CURLOPT_TIMEOUT, 3);

	res = curl_easy_perform(curl);  //先访问登录界面，获取JSESSIONID,lt,execution



	if (res != 0)

	{

		return 0;

	}

	curl_easy_cleanup(curl);



	QString strHtmlGet(strResponse.c_str());

	qDebug("readString = %s", qPrintable(strHtmlGet));



	int index = strHtmlGet.indexOf("Set-Cookie");

	strHtmlGet = strHtmlGet.right(strHtmlGet.length() - index);

	QString strTemp = strHtmlGet.left(strHtmlGet.indexOf(";"));

	//取得COOKIE（JSESSIONID）

	QString strCookie = strTemp.right(strTemp.length() - strTemp.indexOf(":") - 2);

	index = strHtmlGet.indexOf(" name=\"lt\" value=\"");

	strHtmlGet = strHtmlGet.right(strHtmlGet.length() - index);

	index = strHtmlGet.indexOf("LT");

	strHtmlGet = strHtmlGet.right(strHtmlGet.length() - index);

	//取得lt值

	QString strLt = strHtmlGet.left(strHtmlGet.indexOf("\""));

	index = strHtmlGet.indexOf("name=\"execution\" value=\"");

	strHtmlGet = strHtmlGet.right(strHtmlGet.length() - index);

	index = strHtmlGet.indexOf("value=\"") + 7;

	strHtmlGet = strHtmlGet.right(strHtmlGet.length() - index);

	//取得execution值

	QString strExe = strHtmlGet.left(strHtmlGet.indexOf("\""));

		



	//准备POST登录的数据 

	QString strData = QString(QStringLiteral("username=201521437&password=wujinyu1996<=%1&execution=%2&_eventId=submit&tenantId=712&rememberMe=false&checkFlag=false&submit=登录&hiddenView=welcome gaoxiaobang")).arg(strLt, strExe);

		

	CURLcode res2;

	CURL* curl2 = curl_easy_init();

	if (curl2 == NULL)

	{

		return CURLE_FAILED_INIT;

	}

	std::string strPostRet;

	std::string strPostHead;





	struct curl_slist *header_opts = 0;

	header_opts = curl_slist_append(header_opts, "Expect: ");

 	header_opts = curl_slist_append(header_opts, "Content-Type: application/x-www-form-urlencoded");

 	header_opts = curl_slist_append(header_opts, "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8");

 	header_opts = curl_slist_append(header_opts, "Host: cas.gaoxiaobang.com");

 	header_opts = curl_slist_append(header_opts, "Origin: https://cas.gaoxiaobang.com");

 	header_opts = curl_slist_append(header_opts, "Referer: https://cas.gaoxiaobang.com/login?service=https://wfec.class.gaoxiaobang.com/&tenantId=712");

	header_opts = curl_slist_append(header_opts, "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36");



// 	curl_easy_setopt(curl2, CURLOPT_VERBOSE, 1);

// 	curl_easy_setopt(curl2, CURLOPT_DEBUGFUNCTION, OnDebug);

		

	curl_easy_setopt(curl2, CURLOPT_SSL_VERIFYPEER, false);

	curl_easy_setopt(curl2, CURLOPT_SSL_VERIFYHOST, false);

	curl_easy_setopt(curl2, CURLOPT_URL, "https://cas.gaoxiaobang.com/login?service=https://wfec.class.gaoxiaobang.com/&tenantId=712");

	curl_easy_setopt(curl2, CURLOPT_POST, 1);

	curl_easy_setopt(curl2, CURLOPT_POSTFIELDS, strData.toUtf8().data());

	curl_easy_setopt(curl2, CURLOPT_COOKIEFILE, "cookie_open.txt");

	curl_easy_setopt(curl2, CURLOPT_FOLLOWLOCATION, 1);

	curl_easy_setopt(curl2, CURLOPT_WRITEFUNCTION, OnWriteData);

	curl_easy_setopt(curl2, CURLOPT_WRITEDATA, (void *)&strPostRet);

	curl_easy_setopt(curl2, CURLOPT_HEADER, TRUE);

	curl_easy_setopt(curl2, CURLOPT_HTTPHEADER, header_opts);

	curl_easy_setopt(curl2, CURLOPT_NOSIGNAL, 1);

    curl_easy_setopt(curl2, CURLOPT_CONNECTTIMEOUT, 10);

	curl_easy_setopt(curl2, CURLOPT_TIMEOUT, 10);





	res2 = curl_easy_perform(curl2);

	curl_easy_cleanup(curl2);

	QString strRes = strPostRet.c_str();

	qDebug("readString = %s", qPrintable(strRes));



// 	QMessageBox message2(QMessageBox::Information, "", QString(strPostRet.c_str()), QMessageBox::Yes);

//  		message2.exec();





	return res2;