nidhi-canopas

## observe_headers.js

async function invokeAPI() {
    await fetch('http://localhost:3000/ping')
        .then(res => {
            for (var headers of res.headers.entries()) {
                console.log(headers[0]+ ': '+ headers[1]);
            }
      })
}

## cors.js

const express = require('express')
const app = express()
const cors = require('cors')
const port = 3000

app.use(cors(
   {
    exposedHeaders: ['token'],
   }

## add_cors.js
const cors = require('cors')
app.use(cors())

## frontend_cors.html
<html>
    <head>
        <title>Demo</title>
    </head>
    <body>
        <p>Welcome to CORS demo</p>
        <script type="text/javascript">

            async function invokeAPI() {
                var result = await fetch('http://localhost:3000/ping')

## backend_cors.js
const express = require('express')
const app = express()
const port = 3000

app.get('/ping', (req, res) => {
  res.send('Pong!')
})

app.listen(port, () => {
  console.log(`Example app listening on port ${port}`)

## in_lambda_check.go
if inLambda() {
   fmt.Println("running aws lambda in aws")
   lambda.Start(YourCode)
} else {
   fmt.Println("running aws lambda in local")
   YourCode()
}

## lambda_env_check.go
func inLambda() bool {
  if lambdaTaskRoot := os.Getenv("LAMBDA_TASK_ROOT"); lambdaTaskRoot != "" {
    return true
  }
  return false
}

## delete.go
ref := client.NewRef("user_scores/1")

if err := ref.Delete(context.TODO()); err != nil {
  log.Fatalln("error in deleting ref: ", err)
}
fmt.Println("user's score deleted successfully:)")

## get_data.go
type UserScore struct {
	Score int `json:"score"`
}

// get database reference to user score
ref := client.NewRef("user_scores/1")

// read from user_scores using ref
var s UserScore
if err := ref.Get(context.TODO(), &s); err != nil {

## add_update.go
// create ref at path user_scores/:userId
ref := client.NewRef("user_scores/" + fmt.Sprint(1))

if err := ref.Set(context.TODO(), map[string]interface{}{"score": 40}); err != nil {
  log.Fatal(err)
}

fmt.Println("score added/updated successfully!")

	async function invokeAPI() {
	await fetch('http://localhost:3000/ping')
	.then(res => {
	for (var headers of res.headers.entries()) {
	console.log(headers[0]+ ': '+ headers[1]);
	}
	})
	}

	const express = require('express')
	const app = express()
	const cors = require('cors')
	const port = 3000

	app.use(cors(
	{
	exposedHeaders: ['token'],
	}
	<html>
	<head>
	<title>Demo</title>
	</head>
	<body>
	<p>Welcome to CORS demo</p>
	<script type="text/javascript">

	async function invokeAPI() {
	var result = await fetch('http://localhost:3000/ping')
	if inLambda() {
	fmt.Println("running aws lambda in aws")
	lambda.Start(YourCode)
	} else {
	fmt.Println("running aws lambda in local")
	YourCode()
	}
	func inLambda() bool {
	if lambdaTaskRoot := os.Getenv("LAMBDA_TASK_ROOT"); lambdaTaskRoot != "" {
	return true
	}
	return false
	}
	type UserScore struct {
	Score int `json:"score"`
	}

	// get database reference to user score
	ref := client.NewRef("user_scores/1")

	// read from user_scores using ref
	var s UserScore
	if err := ref.Get(context.TODO(), &s); err != nil {
	// create ref at path user_scores/:userId
	ref := client.NewRef("user_scores/" + fmt.Sprint(1))

	if err := ref.Set(context.TODO(), map[string]interface{}{"score": 40}); err != nil {
	log.Fatal(err)
	}

	fmt.Println("score added/updated successfully!")