Nginx proxy to S3 with caching

README.md

Proxy cache passes GET instead of HEAD to upstream... so we have a 403.

This version include these fixes.

• Remove $request_method from $string_to_sign and pass static string "GET" instead
• Remove proxy_buffering directive for allowing the nginx cache

nginx-lua-s3.nginxconf

  location ~* ^/s3/(.*) {
    proxy_cache           static;
    proxy_cache_valid     200 24h;
    proxy_hide_header     x-amz-id-2;
    proxy_hide_header     x-amz-request-id;
    proxy_hide_header     Set-Cookie;
    proxy_ignore_headers  Set-Cookie;

    set $bucket           '<REPLACE WITH YOUR S3 BUCKET NAME>';
    set $aws_access       '<REPLACE WITH YOUR AWS ACCESS KEY>';
    set $aws_secret       '<REPLACE WITH YOUR AWS SECRET KEY>';
    set $url_full         "$1";
    set_by_lua $now       "return ngx.cookie_time(ngx.time())";
    set $string_to_sign   "GET\n\n\n\nx-amz-date:${now}\n/$bucket/$url_full";
    set_hmac_sha1          $aws_signature $aws_secret $string_to_sign;
    set_encode_base64      $aws_signature $aws_signature;

    proxy_http_version     1.1;
    proxy_set_header       Host $bucket.s3.amazonaws.com;
    proxy_set_header       x-amz-date $now;
    proxy_set_header       Authorization "AWS $aws_access:$aws_signature";
    # proxy_buffering        off;
    proxy_intercept_errors on;

    rewrite .* /$url_full break;

    proxy_pass             http://s3.amazonaws.com;
  }