你可以使用request-ip来获取用户的ip地址。它处理了很多不同的边界情况，其中一些在其他答案中提到过。

披露:我创建了这个模块

安装:

npm install request-ip

在你的应用中:

var requestIp = require('request-ip');

// inside middleware handler
var ipMiddleware = function(req, res, next) {
    var clientIp = requestIp.getClientIp(req); // on localhost > 127.0.0.1
    next();
};

希望这能有所帮助

在节点10.14中，在nginx后面，你可以通过nginx头请求它来检索ip，就像这样:

proxy_set_header X-Real-IP $remote_addr;

然后在你的app.js中:

app.set('trust proxy', true);

在那之后，你想让它出现的地方:

var userIp = req.header('X-Real-IP') || req.connection.remoteAddress;

如果你有多个ip，这对我来说是可行的:

Var ipaddress = (req。标题(“x-forwarded-for”)| | req.connection.remoteAddress | | req.socket.remoteAddress | | req.connection.socket.remoteAddress) .split (", ") [0];

在nodejs中简单获取远程ip:

var ip = req.header('x-forwarded-for') || req.connection.remoteAddress;

这里有很多很棒的观点，但没有一个是全面的，所以这里是我最终使用的:

function getIP(req) {
  // req.connection is deprecated
  const conRemoteAddress = req.connection?.remoteAddress
  // req.socket is said to replace req.connection
  const sockRemoteAddress = req.socket?.remoteAddress
  // some platforms use x-real-ip
  const xRealIP = req.headers['x-real-ip']
  // most proxies use x-forwarded-for
  const xForwardedForIP = (() => {
    const xForwardedFor = req.headers['x-forwarded-for']
    if (xForwardedFor) {
      // The x-forwarded-for header can contain a comma-separated list of
      // IP's. Further, some are comma separated with spaces, so whitespace is trimmed.
      const ips = xForwardedFor.split(',').map(ip => ip.trim())
      return ips[0]
    }
  })()
  // prefer x-forwarded-for and fallback to the others
  return xForwardedForIP || xRealIP || sockRemoteAddress || conRemoteAddress
}

首先，在项目中安装request-ip

import requestIp from 'request-ip';
const clientIp = requestIp.getClientIp(req); 
console.log(clientIp)

如果使用localhost，结果可能是::1，因为::1是真实的IP地址，是localhost的IPV6表示法。