How to proxy api requests with NTLM authentication in a create-react-app project

setupProxy.js

const http = require("http");
const proxy = require("http-proxy-middleware");

module.exports = function(app) {
  app.use(
    "/api",
    proxy({
      agent: new http.Agent({ keepAlive: true }),
      target: "http://example.com/",
      onProxyRes(proxyRes) {
        const header = "www-authenticate";
        proxyRes.headers[header] =
          proxyRes.headers[header] && proxyRes.headers[header].split(",");
      }
    })
  );
};

Still fails most of the time. I usually have to make an API call in a new tab (ie http://testEnv/api/bootstrap) to the real site to get any connections to work via the local proxy on any consistent basis. otherwise it just get hung on sending basic auth info over and over again.

@nullberri what is your setup like? I'm running an ASP.NET Core WebAPI application through Visual Studio (IIS Express). I haven't encountered any problems yet ...

@dunnza - thanks very much for sharing this. Worked perfectly for me and got me out of a bind.

@TeonWasTaken I'm glad it helped you!