W3C json log format for nginx

w3c.conf

## this GeoIP dat file relate on centos environment please change to your OS path
geoip_country /usr/share/GeoIP/GeoIP-initial.dat;

map $request_uri $request_uri_path {
  "~^(?P<path>[^?]*)(\?.*)?$"  $path;
}

map $upstream_response_time $new_upstream_response_time {
  default $upstream_response_time;
  '' null;
}

log_format w3cjson escape=json
'{'
  '"Date":"$time_iso8601",'
  '"Client IP Address":"$remote_addr",'
  '"Client Username":"$remote_user",'
  '"Server IP Address":"$server_addr",'
  '"Request Port":$server_port,'
  '"Request Protocol":"$server_protocol",'
  '"Request Method":"$request_method",'
  '"Request URI":"$request_uri_path",'
  '"Query String":"$query_string",'
  '"Status":$status,'
  '"User Agent":"$http_user_agent",'
  '"Cookie":"$http_cookie",'
  '"Referer":"$http_referer",'
  '"Bytes Received":$request_length,'
  '"Bytes Sent":$body_bytes_sent,'
  '"Request Time":$request_time,'
  '"X-Forwarded-For":"$http_x_forwarded_for",'
  '"Upstream":"$upstream_addr",'
  '"Upstream Response Time":$new_upstream_response_time,'
  '"Upstream Cache Status":"$upstream_cache_status",'
  '"Request Country Code":"$geoip_country_code"'
'}';

Save this file to /etc/nginx/conf.d/ (for nginx on centos)
So enable GeoIP too for locating a source location.

How to use.
access_log /path/to/log/vhostname.access.log w3cjson;