nginx打印请求头日志方法(亲测可用)

http {
    include       mime.types;
    default_type  application/octet-stream;

    #这个是默认日志格式
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    #这个是自定义的打印请求头的日志格式
        log_format accesslog_headers  '$time_iso8601'
                        '\t$request_time'
                        '\t$status'
                        '\t$remote_addr'
                        '\t$http_x_forwarded_for'
                        '\t$host'
                        '\t$server_addr'
                        '\t$request_method'
                        '\t$uri' #cs-uri-stem
                        '\t$args' #cs-uri-query
                        '\t"$http_user_agent"'
                        '\t"$http_referer"'
                        '\t$bytes_sent'
                        '\t$request_length'
                        '\t$upstream_addr'
                        '\t$upstream_status'
                        '\t$upstream_response_time'
                        '\t$request_uri'
                        '\t$request_headers'; #设置这个变量，后面赋值

    #这里配置后全局的日志都会用默认日志格式main，日志打印位置是logs文件夹里的access.log文件
    access_log  logs/access.log  main;

location /my/header/api/ {
        #这个是增加的，使用打印请求头的日志格式accesslog_headers，日志打印位置是logs/access_headers.log
        access_log  logs/access_headers.log  accesslog_headers;
        
        #给request_headers变量赋值，使用lua获取到请求头
        set_by_lua $request_headers 'local h = ngx.req.get_headers()
                                local request_headers_all = ""
                                for k, v in pairs(h) do
                                    request_headers_all = request_headers_all .. ""..k..": "..v..";"
                                end
                                return request_headers_all';