nginx point subdomain to subfolder

Question

I want http://blog.domain.com/ to point to http://www.domain.com/blog

Just a notice, not to redirect to that location, but just point to it.
Also /blog is not a folder. It could be blog.php for example

So when I navigate to http://blog.domain.com, the website display's content from http://www.domain.com/blog

What I tried so far:

server{
  listen 80;
  server_name blog.domain.com;

  rewrite ^/blog(.*) http://blog.domain.com/$1 permanent;    
}

The result is nginx returning 404 not found error.

Answer 1

I try to avoid regex because I'm terrible at it. Perhaps try:

  return 301 http://www.example.com/blog$request_uri;

Pitfalls - Nginx Community

Would setting root to the directory that serves www.example.com/blog perform the function you are looking for?

server{
  listen 80;
  server_name blog.domain.com;
  root /path/to/blog;
}

Answer 2

Your rewrite syntax is the wrong way around. You want to rewrite the root to the subfolder. In that rule you are rewriting the /blog folder, which isn't what you want.

In .htaccess the rule would be:

RewriteRule ^(.*)$ /blog/$1 [L]

Convert that into your nginx format.