nodejs+nginx获取真实ip

location / {
　　proxy_set_header Host $http_host;
　　proxy_set_header X-Real-IP $remote_addr;
　　proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
　　proxy_pass http://127.0.0.1:8360/;
}

//获取ip（内网或外网）
var getIp = function(_http) {
	var ipStr = _http.headers['X-Real-IP'] || _http.headers['x-forwarded-for'];
	if (ipStr) {
		var ipArray = ipStr.split(",");
		if (ipArray || ipArray.length > 0) { //如果获取到的为ip数组
			return ipArray[0];
		}
	} else { //获取不到时
		return _http.ip().substring(_http.ip().lastIndexOf(":") + 1);
	}
};

//获取外网ip
var getNetIp = function(_http) {
	var ipStr = _http.headers['X-Real-IP'] || _http.headers['x-forwarded-for'];
	if (ipStr) {
		var ipArray = ipStr.split(",");
		if (ipArray.length > 1) { //如果获取到的为ip数组
			for (var i = 0; i < ipArray.length; i++) {
				var ipNumArray = ipArray[i].split(".");
				var tmp = ipNumArray[0] + "." + ipNumArray[1];
				if (tmp == "192.168" || (ipNumArray[0] == "172" && ipNumArray[1] >= 16 && ipNumArray[1] <= 32) || tmp == "10.7") {
					continue;
				}
				return ipArray[i];
			}
		}
		return ipArray[0];
	} else { //获取不到时
		return _http.ip().substring(_http.ip().lastIndexOf(":") + 1);
	}
};