Node.js
//传入请求HttpRequest
function getClientIp(req) {
return req.headers['x-forwarded-for'] ||
req.connection.remoteAddress ||
req.socket.remoteAddress ||
req.connection.socket.remoteAddress;
}
Express
//express框架则简单许多
req.ip
意外收获
发现这两种方式获取的ip地址都带有前缀，不知为何，看了眼Express request.js源码，没找到不对的地方。所以用正则表达式处理了下
req.ip.match(/\d+\.\d+\.\d+\.\d+/)