日志写为json格式的问题

[lf2186]

hi,

 你好，

想把日志记录改为json格式，如下，修改mod_access配置文件：
RequestTemplate = "{ "ReqLog_type": "REQUEST_LOG", "local_time": "$time", "clientip": "$remote_client_addr", "\http_me
thod": "$req_method", "http_scheme": "$req_schema", "host": "$host", "url": "$req_url", "status": "$status_code",
"reqbodylen": "$req_body_len", "respbodylen": "$res_body_len", "time_all": "$all_time", "time_connect_rs": "$connect
_time", "product": "$product", "backend": "$backend", "pro_version": "$res_proto", "req_seq": "$req_nth", "clientp
ort": "$remote_client_port", "user_agent": "${User-Agent}req_header", "error": "$error", "xff": "${X-Forwarded-For}req
_header", "xrealip": "${X-Real-IP}req_header", "rrdt": "$read_req_duration", "pdt": "$proxy_delay", "wst": "$write_s
erve_time", "rdt": "$response_duration", "cdt": "$cluster_duration", "lbdt": "$last_backend_duration", "rst": "$read
write_serve_time", "ssst": "$since_ses_start_time" }"

但是启动bfe报错：
[01/11/22 19:27:33] [EROR] Err in module.init() for mod_access [mod_access: cond load err conf/mod_access/mod_access.conf:9:21: unknown escape sequence (and 1 more errors)]
[01/11/22 19:27:33] [EROR] StartUp(): bfeServer.InitModules():mod_access: cond load err conf/mod_access/mod_access.conf:9:21: unknown escape sequence (and 1 more errors)
[01/11/22 19:27:33] [EROR] main(): bfe_server.StartUp(): mod_access: cond load err conf/mod_access/mod_access.conf:9:21: unknown escape sequence (and 1 more errors)

怎么解决？？

[liuqing6767]

基于问题描述，做了一个配置：

[Template]
RequestTemplate = "{\"ReqLog_type\":\"REQUEST_LOG\",\"local_time\":\"$time\",\"clientip\":\"$ses_clientip\" ,\"http_method\":\"?req_method\",\"http_scheme\":\"?req_schema\",\"host\":\"$host\",\"url\":\"$url\",\"status\":\"$status_code\",\"reqbodylen\":\"$req_body_len\",\"respbodylen\":\"$res_body_len\",\"time_all\":\"$all_time\",\"time_connect_rs\":\"$connect_time\",\"product\":\"$product\",\"backend\":\"$backend\",\"pro_version\":\"$res_proto\",\"req_seq\":\"$req_nth\",\"clientport\":\"?remote_client_port\",\"user_agent\":\"User-Agent $req_header\",\"error\":\"$error\",\"xff\":\"X-Forwarded-For req_header\",\"xrealip\":\"${X-Real-IP}req_header\",\"rrdt\":\"$read_req_duration\",\"pdt\":\"$proxy_delay\",\"wst\":\"$write_serve_time\",\"rdt\":\"$response_duration\",\"cdt\":\"$cluster_duration\",\"lbdt\":\"$last_backend_duration\",\"rst\":\"$readwrite_serve_time\",\"ssst\":\"$since_ses_start_time\"}"

可得到如下日志：

{"ReqLog_type":"REQUEST_LOG","local_time":"2022-01-12 16:09:27","clientip":"127.0.0.1" ,"http_method":"?req_method","http_scheme":"?req_schema","host":"127.0.0.1:8080","url":"/aaa","status":"500","reqbodylen":"0","respbodylen":"0","time_all":"1","time_connect_rs":"","product":"-","backend":",,,","pro_version":"","req_seq":"1","clientport":"?remote_client_port","user_agent":"curl/7.77.0","error":"BK_FIND_PRODUCT,no product found","xff":"xxxxdfafafaf","xrealip":"-","rrdt":"0","pdt":"-","wst":"0","rdt":"0","cdt":"0","lbdt":"0","rst":"-","ssst":"1"}

问题中的示例：

• 不是一个合法的json字符串
• 加入了自定义的变量（这个不是问题）

配置项具体构造过程建议如下步骤：

• 构造json格式的配置模板，形如：

{
	"ReqLog_type": "REQUEST_LOG",
	"local_time": "$time"
}

• 压缩json
• 转义json 得到 t
• 配置项为： RequestTemplate = "{t}"

（json操作可以用 https://www.bejson.com/）

另外，请关注：如果变量计算结果存在 双引号，因为 日志生产时不会转义，可能出现非法json字符串。

请按建议步骤再进行尝试或反馈。