nginx.conf

user www-data;
worker_processes 4;
pid /var/run/nginx.pid;

events {
  worker_connections 768;
}

http {
  # Basic Settings
  sendfile on;
  tcp_nopush on;
  tcp_nodelay on;
  keepalive_timeout 65;
  types_hash_max_size 2048;

  include /etc/nginx/mime.types;
  default_type application/octet-stream;

  # Logging Settings
  access_log /var/log/nginx/access.log;
  error_log /var/log/nginx/error.log notice;

  # Gzip Settings
  gzip on;
  gzip_disable "msie6";

  include /etc/nginx/conf.d/*.conf;
  include /etc/nginx/sites-enabled/*;
}

http {
  limit_req_zone $binary_remote_addr zone=one:100m rate=10r/s;
  limit_req_log_level notice;

  server {
    listen       80;
    server_name  localhost;

    # this is purposefully set high right now
    # so that it will pass on long URIs to GA
    # this should be replaced with nginx returning
    # a valid 414 page when the buffer = 2k (GA's limit)
    large_client_header_buffers 8 32k;

    location / {
      limit_req zone=one burst=1;
      proxy_pass https://www.googleapis.com:443/analytics/v3/data/ga;
    }

    location /legacy {
      limit_req zone=one burst=1;
      proxy_pass https://www.googleapis.com:443/analytics/v2.4/data;
    }
  }
}

http {
  limit_req_zone $binary_remote_addr zone=two:100m rate=42r/s;
  limit_req_log_level notice;
  log_format timed_combined '$remote_addr - $remote_user [$time_local]  '
                            '"$request" $status $body_bytes_sent '
                            '"$http_referer" "$http_user_agent" $request_time $upstream_response_time';

  access_log /var/log/nginx/access.log timed_combined;

  server {
    listen 8080;
    server_name localhost;
    large_client_header_buffers 8 2020;

    # 414.html is locationed in /usr/share/nginx/html/
    error_page 414 /414.html;

    location = / {
      limit_req zone=two burst=5;
      proxy_connect_timeout 50s;
      proxy_pass https://www.googleapis.com:443/analytics/v3/data/ga;
    }
  }
}