Http to Https redirection for ec2 instance

If you want traffic coming to web server redirect to https without change the backed listener to port 443,
ELB supports a HTTP header called X-FORWARDED-PROTO. you can force the http to https redirection by writing simple rule.
If your using IIS,

<rewrite xdt:Transform="Insert">
  <rules>
    <rule name="HTTPS rewrite behind ELB rule" stopProcessing="true">
      <match url="^(.*)$" ignoreCase="false" />
      <conditions>
        <add input="{HTTP_X_FORWARDED_PROTO}" pattern="^http$" ignoreCase="false" />
      </conditions>
      <action type="Redirect" redirectType="Found" url="https://{SERVER_NAME}{URL}" />
    </rule>
  </rules>
</rewrite>

If your using Apache,

<VirtualHost *:80>
    RewriteEngine On
    RewriteCond %{HTTP:X-Forwarded-Proto} !https
    RewriteRule ^(.*)$ https://%{SERVER_NAME}%{REQUEST_URI} [NE]
</VirtualHost>

If your using NGINX,

server {
    listen 80;
    location / {
        if ($http_x_forwarded_proto != 'https') {
            return 301 https://$server_name$request_uri;
        }
        try_files $uri $uri/ /index.php?$args;
    }
}