之前为了便于python分析nginx日志，将日志格式改为json格式。但是用goaccess分析json格式还需要再下配置。

nginx中格式配置如下：

log_format api escape=json
	'{'
	'"remote_addr":"$remote_addr",'
	'"X-Forwarded-For":"$http_X_Forwarded_For",'
	'"remote_user":"$remote_user",'
	'"time_local":"$time_local",'
	#'"request":"$request",'
	'"method":"$request_method",'
	'"uri":"$uri",'
	'"server_protocol":"$server_protocol",'
	'"request_body":"$request_body",'
	'"status":"$status",'
	'"body_bytes_sent":"$body_bytes_sent",'
	'"http_referer":"$http_referer",'
	'"user_agent":"$http_user_agent",'
	'"upstream_response_time":"$upstream_response_time"'
	'}';

nginx访问日志如下：

{"remote_addr":"115.220.x.x","X-Forwarded-For":"","remote_user":"","time_local":"09/Apr/2020:13:28:09 +0800","method":"POST","uri":"/xxx/xxx","server_protocol":"HTTP/1.1","request_body":"xxxxxxx","status":"200","body_bytes_sent":"468","http_referer":"","user_agent":"Mozilla/5.0 (Linux; Android 10; LIO-AN00 Build/HUAWEILIO-AN00; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.64 Mobile Safari/537.36","upstream_response_time":"0.003"}

goaccess 官方配置文档：https://goaccess.io/man#custom-log
goaccess配置文件：

time-format %H:%M:%S # 定义时分秒格式 通过%t调用
date-format %d/%b/%Y # 定义日期格式   通过%d调用
log-format %^:"%h",%^:%^,%^:%^,%^:"%d:%t %^",%^:"%m",%^:"%U",%^:"%H",%^:%^,%^:"%s",%^:%^,%^:"%R",%^:"%u",%^:%^

拼出来要匹配的json格式（等于保留冒号和逗号），还是跟以前一样通过%^忽略某个字段，如：
第一个%^即可忽略{“remote_addr”部分，冒号后面双引号中的%h即可匹配到客户端ip地址，以此来依次匹配出需要的字段。