Function SendHttpQuery

mars/sdt/src/checkimpl/httpquery.cc:79–203

int SendHttpQuery(const std::string& _url, int& _status_code, std::string& _errmsg, int _timeout) {
    xinfo2(TSF"httpQuery:_url=%_", _url);
    if (!strutil::StartsWith(_url, "http://")) {
    	xerror2(TSF"url is not start with http://");
        _errmsg.append("url is not start with http://");
        return -2;
    }
    unsigned long long timebegin = gettickcount();

    if (_timeout <= 0) {
        _timeout = HTTP_DEFAULT_TIMEOUT;
    }
    HttpUrlParser http_url_parser(_url);
    std::string host = http_url_parser.Host();
    xdebug2(TSF"host=%0", host);

    std::string str_req("");
    http::RequestLine reqLine(http::RequestLine::kGet, http_url_parser.Path(), http::kVersion_1_1);
    str_req.append(reqLine.ToString());

    http::HeaderFields header;
    header.HeaderFiled("Accept", "text/html, application/xhtml+xml, */*");
    header.HeaderFiled("Accept-Language", "zh-CN");
    header.HeaderFiled("User-Agent", USER_AGENT);
    header.HeaderFiled("Accept-Encoding", "gzip, deflate");
    header.HeaderFiled("Proxy-Connection", "Keep-Alive");

    bool domain_is_ipaddr = socket_address(host.c_str(), 0).valid();  // 判断strHost是否是一个点分十进制IP

    header.HeaderFiled("Host", host.c_str());
    str_req.append(header.ToString());
    str_req.append("\r\n\r\n");  // important

    xdebug2(TSF"str_req=%_", str_req);

    unsigned int port = http_url_parser.Port();

    struct socket_ipinfo_t ipinfo;

    char ip[20] = {0};

    int ret = 0;

    do {
        if (!domain_is_ipaddr) {
            unsigned long long timespan1 = gettickspan(timebegin);

            if ((unsigned int)_timeout <= timespan1) {
                xwarn2(TSF"check http timeout.");
                _errmsg.append("check http timeout.");
                ret = -1;
                break;
            }

            if (0 == socket_gethostbyname(host.c_str(), &ipinfo, (int)(_timeout - timespan1), NULL)) {
                strncpy(ip, socket_address(ipinfo.ip[0]).ip(), sizeof(ip));
            } else {
                xerror2(TSF"check http get DNS error.");