# nginx Configuration File
# http://wiki.nginx.org/Configuration

# Run as a less privileged user for security reasons.
user nobody nobody;

# How many worker threads to run;
# "auto" sets it to the number of CPU cores available in the system, and
# offers the best performance. Don't set it higher than the number of CPU
# cores if changing this parameter.

# The maximum number of connections for Nginx is calculated by:
# max_clients = worker_processes * worker_connections
# (2 Cores = 4 processes) check cores: grep processor /proc/cpuinfo | wc -l
#worker_processes auto;
worker_processes 4;

# Maximum open file descriptors per process;
# should be > worker_connections.
worker_rlimit_nofile 20000;

events {
  # The worker_connections command tells our worker processes how many people can simultaneously be served by Nginx.
  # When you need > 8000 * cpu_cores connections, you start optimizing your OS,
  # and this is probably the point at which you hire people who are smarter than
  # you, as this is *a lot* of requests.
  # worker_connections 768;
  worker_connections            19000;
  multi_accept                  on;
  use                           epoll;
}

# Default error log file
# (this is only used when you don't override error_log on a server{} level)
error_log  /var/lib/nginx/error.log debug;
pid        /var/run/nginx.pid;


http {

  # Hide nginx version information.
  server_tokens on;

  # Define the MIME types for files.
  include       /etc/nginx/mime.types;
  default_type  application/octet-stream;

  # Update charset_types due to updated mime.types
  charset_types text/css text/plain text/vnd.wap.wml application/javascript application/json application/rss+xml application/xml;

  # Speed up file transfers by using sendfile() to copy directly
  # between descriptors rather than using read()/write().
  # For performance reasons, on FreeBSD systems w/ ZFS
  # this option should be disabled as ZFS's ARC caches
  # frequently used files in RAM by default.
  sendfile        on;

  # Tell Nginx not to send out partial frames; this increases throughput
  # since TCP frames are filled up before being sent out. (adds TCP_CORK)
  tcp_nopush      off;

  # Send packages immediately (on). Otherwise nginx will "wait" 200ms for additional data to fullfill a package.
  tcp_nodelay     on;

  # Timeouts ==================================================================================================================

  # 'Body' and 'Header' max response timings. If neither a body or header is sent, the server will issue a 408 error or Request time out. (Default: 60s)
  client_body_timeout 25;
  client_header_timeout 25;

  # Assigns the timeout for keep-alive connections with the client.
  # Simply put, Nginx will close connections with the client after this period of time.(Default: 65)
  keepalive_timeout 40s;

  # Finally, the send_timeout is established not on the entire transfer of answer, but only between two operations of reading;
  # if after this time client will take nothing, then Nginx is shutting down the connection.
  send_timeout 50s;

  # Sets a timeout for name resolution. (Default: 30s)
  resolver_timeout 30s;

  # Timeout period for connection with FastCGI-server. It should be noted that this value can't exceed 75 seconds. (Default: 60s)
  fastcgi_connect_timeout 60s;

  # Amount of time for upstream to wait for a fastcgi process to send data.
  # Change this directive if you have long running fastcgi processes that do not produce output until they have finished processing.
  # If you are seeing an upstream timed out error in the error log, then increase this parameter to something more appropriate. (Default: 60s)
  fastcgi_read_timeout 60s;

  # Request timeout to the server. The timeout is calculated between two write operations, not for the whole request.
  # If no data have been written during this period then serve closes the connection. (Default: 60s)
  fastcgi_send_timeout  60s;

  # WebSockets ===============================================================================================================




  # Buffer ====================================================================================================================

  # Similar to the previous directive, only instead it handles the client header size.
  # For all intents and purposes, 1K is usually a decent size for this directive.
  client_header_buffer_size 1k;

  # The maximum number and size of buffers for large client headers.
  large_client_header_buffers 4 4k;

  # The maximum allowed size for a client request. If the maximum size is exceeded, then Nginx will spit out a 413 error or Request Entity Too Large. (Default: 1m)
  # php max upload limit cannot be larger than this
  client_max_body_size 8m;

  # This handles the client buffer size, meaning any POST actions sent to Nginx. POST actions are typically form submissions.
  client_body_buffer_size 1M;

  output_buffers                        2 32k;

  fastcgi_buffering                     on;
  fastcgi_buffers                       8 32k;
  fastcgi_buffer_size                   32k;

  # Caching ==================================================================================================================

  # Above sample tells nginx to cache a file information as long as minimum 2 requests are made during 5m window.
  open_file_cache                       max=10000 inactive=5m;
  open_file_cache_valid                 2m;
  open_file_cache_min_uses              1;
  open_file_cache_errors                on;

  # Fast CGI
  # fastcgi_cache_path /etc/nginx/cache levels=1:2 keys_zone=MYAPP:100m inactive=60m;
  # fastcgi_cache_key "$scheme$request_method$host$request_uri";

  # Logging ===================================================================================================================

  # Format to use in log files
  log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" '
                    '"$http_user_agent" "$http_x_forwarded_for"';

  # Extended Logging (e.g. for Nginx Aplify log graphs)
  log_format  main_ext  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for" '
                      '"$host" sn="$server_name" '
                      'rt=$request_time '
                      'ua="$upstream_addr" us="$upstream_status" '
                      'ut="$upstream_response_time" ul="$upstream_response_length" '
                      'cs=$upstream_cache_status' ;

  # This excludes 2xx and 3xx status codes from beeing loged
  map $status $loggable {
    ~^[23]  0;
    default 1;
  }

  # logs just 5xxx errors
  map $status $log_production {
    ~^[1234]  0;
    default 1;
  }

  map $http_upgrade $connection_upgrade {
        default upgrade;
        '' close;
 }

 upstream websocket {
  server ${PATHFINDER_SOCKET_HOST}:8020;
 }




  # Default log file
  # (this is only used when you don't override access_log on a server{} level)
  access_log /var/log/nginx/access.log main if=$loggable;

  # Compression ===============================================================================================================

  # Enable Gzip compressed.
  gzip on;

  # Compression level (1-9).
  # 5 is a perfect compromise between size and cpu usage, offering about
  # 75% reduction for most ascii files (almost identical to level 9).
  gzip_comp_level    5;

  # Don't compress anything that's already small and unlikely to shrink much
  # if at all (the default is 20 bytes, which is bad as that usually leads to
  # larger files after gzipping).
  gzip_min_length    256;

  # Compress data even for clients that are connecting to us via proxies,
  # identified by the "Via" header (required for CloudFront).
  # gzip_proxied expired no-cache no-store private auth;
  gzip_proxied       any;

  # Tell proxies to cache both the gzipped and regular version of a resource
  # whenever the client's Accept-Encoding capabilities header varies;
  # Avoids the issue where a non-gzip capable client (which is extremely rare
  # today) would display gibberish if their proxy gave them the gzipped version.
  gzip_vary          on;

  # Compress all output labeled with one of the following MIME-types.
  gzip_types
    application/atom+xml
    application/javascript
    application/json
    application/ld+json
    application/manifest+json
    application/rss+xml
    application/vnd.geo+json
    application/vnd.ms-fontobject
    application/x-font-ttf
    application/x-web-app-manifest+json
    application/xhtml+xml
    application/xml
    font/opentype
    image/bmp
    image/svg+xml
    image/x-icon
    text/cache-manifest
    text/css
    text/plain
    text/vcard
    text/vnd.rim.location.xloc
    text/vtt
    text/x-component
    text/x-cross-domain-policy;
    # text/html;

  # This should be turned on if you are going to have pre-compressed copies (.gz) of
  # static files available. If not it should be left off as it will cause extra I/O
  # for the check. It is best if you enable this in a location{} block for
  # a specific directory, or on an individual server{} level.
  gzip_static off;

  proxy_buffers 16 16k;
  proxy_buffer_size 16k;

  # Include files in the sites-enabled folder. server{} configuration files should be
  # placed in the sites-available folder, and then the configuration should be enabled
  # by creating a symlink to it in the sites-enabled folder.
  # See doc/sites-enabled.md for more info.
  # include /etc/nginx/conf.d/*.conf;
  include /etc/nginx/sites_enabled/*.conf;
}