AWS Lambda as Reverse proxy for Grafana

[susanta]

Dear Team,
We are trying to use AWS lambda as Reverse proxy for Grafana and using node JS for lambda.

Below is the lambda code:

const express = require('express');

const app = express();
const serverless = require('serverless-http');
const port = 8000;
const varenv = 'production';
 
app.use(express.static('view'))
 
var http = require('http');
var httpProxy = require('http-proxy');
var proxy = httpProxy.createProxyServer({});
 
proxy.on('proxyReq', function (proxyReq, req) {
    proxyReq.setHeader('X-WEBAUTH-USER', 'admin')
});
 
proxy.on('proxyRes', function (proxyRes, req, res) {
    res.setHeader('Access-Control-Allow-Origin', '*');
});
 
proxy.on('error', function (err, req, res) {
    res.writeHead(500, {'Content-Type': 'text/plain'});
    console.log("error----",err);
    console.log("req----",req);
    console.log("res----",res);
    res.end("An error occured ....Susanta-101");
});
 
app.all("/*", function (req, res) {
    console.log("Forwarding to grafana server...")
    proxy.web(req, res, {
        target: 'http://stack-Grafa-1GNU1ALCSQL27-734749157.us-east-1.elb.amazonaws.com/', // link to our target service
        secure: false
    });
    // res.end("An error occured...susanta!!!");
})


// process.env.ENVIRONMENT === 'production'
if (varenv === 'production') {
    console.log("serverless block...!!!")
    exports.handler = serverless(app);
} else {
    app.listen(port,
        () => console.log(`Susanta Listening on port ${port}!`))
}

Also, connected the lambda to AWS api gateway and accessing through api url and getting the below errors:

Could you please help me out to resolve this one.

Thanks,
Susanta