在使用nginx记录访问日志时，发现在含有 request_body 的 PUT , POST 请求时，日志中会含有 x22 x9B x5C x09 x08 字符，不利于阅读和处理。 具体 支持 request_body 的http method参见 http1.1定义 9 Method Definitions 和 Payloads of HTTP Request Methods nginx.conf 默认access_log 配置 log_format main '$remote_addr - $remote_user [$time_local] "$request" ' '$status $body_bytes_sent "$http_referer" ' '"$http_user_agent" "$http_x_forwarded_for"' '$http_host $upstream_status $upstream_addr $request_time $upstream_response_time'; 改成 log_format json_log escape=json '{"realip":"$remote_addr","@timestamp":"$time_iso8601","host":"$http_host","request":"$request","req_body":"$request_body","status":"$status","size":$body_bytes_sent,"ua":"$http_user_agent","cookie":"$http_cookie","req_time":"$request_time","uri":"$uri","referer":"$http_referer","xff":"$http_x_forwarded_for","ups_status":"$upstream_status","ups_addr":"$upstream_addr","ups_time":"$upstream_response_time"}'; 参考 How to generate a JSON log from nginx? 官方文档ngx_http_log_module.html#log_format 注意， escape 是从 1.11.8 后新增的参数。 如果是老版本的，linux可以考虑使用 shell 命令替换， logstash 可以考虑使用 ruby 处理 ，参考 Optionally support handling of x escape codes 博客 https://anjia.ml/2017/06/21/nginx-logging-request-body-as-hexidecimal/ 简书 http://www.jianshu.com/p/8409f28f32e9 掘金 https://juejin.im/post/5949e0f7128fe1006a627cc0