bug: The `/` in the log will be added with an extra `\` when enabled file-logger and sls-logger

[henkuaifacai]

Current Behavior

当时使用了file-logger和sls-logger会出现日志里的/会被加个\

Expected Behavior

希望能按正常的日志出输到文件和阿里云的sls

Error Logs

content:{"service_id":"","latency":0.99992752075195,"request":{"headers":{"if-modified-since":"Fri, 16 May 2014 15:12:48 GMT","upgrade-insecure-requests":"1","cache-control":"max-age=0","accept-encoding":"gzip, deflate","accept":"text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,/;q=0.8,application/signed-exchange;v=b3;q=0.9","user-agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36","accept-language":"zh-CN,zh;q=0.9","connection":"keep-alive","host":"60.test.com:9080","if-none-match":""53762af0-12e1""},"method":"GET","uri":"/","url":"http://60.test.com:9080/","querystring":{},"size":543},"client_ip":"192.168.139.1","upstream":"192.168.139.130:80","upstream_latency":1,"response":{"headers":{"date":"Wed, 24 Aug 2022 03:54:48 GMT","etag":""53762af0-12e1"","connection":"close","server":"APISIX/2.15.0","last-modified":"Fri, 16 May 2014 15:12:48 GMT"},"size":182,"status":304},"server":{"hostname":"Harbor","version":"2.15.0"},"apisix_latency":0,"route_id":"422421849201183291","start_time":1661313288377

Steps to Reproduce

只需要配置file-logger和sls-logger就会有这种情况

Environment

• APISIX version (run apisix version):
• Operating system (run uname -a):
• OpenResty / Nginx version (run openresty -V or nginx -V):
• etcd version, if relevant (run curl http://127.0.0.1:9090/v1/server_info):
• APISIX Dashboard version, if relevant:
• Plugin runner version, for issues related to plugin runners:
• LuaRocks version, for installation issues (run luarocks --version):

[moonming]

[spacewander]

The json library we used (lua-cjson) will escape / to \/, as this library chooses to be compatible with the behavior of PHP.

[henkuaifacai]

The json library we used (lua-cjson) will escape / to \/, as this library chooses to be compatible with the behavior of PHP.

Is there any way to solve this problem

[Lewisyixin]

我们自己根据filelogger插件做了一个根据域名拆分日志的插件，也遇到你这个问题了，我们是重新引用了openresty的json模块 openresty的json模块可以专门有一个参数可以关闭 '/' 前的''。

local json = require("cjson")
json.encode_escape_forward_slash(false)

apisix的json模块是自己稍微做了下封装，我测试过直接在core.json里开启这个参数也是能生效的，但是相当于全局使用的json都会被修改所以不太敢这么做。所以你们如果只是某个插件想去掉这个转义符，可以稍微修改下这个插件里的json模块引用。

[henkuaifacai]

我们自己根据filelogger插件做了一个根据域名拆分日志的插件，也遇到你这个问题了，我们是重新引用了openresty的json模块 openresty的json模块可以专门有一个参数可以关闭 '/' 前的''。

local json = require("cjson")
json.encode_escape_forward_slash(false)

apisix的json模块是自己稍微做了下封装，我测试过直接在core.json里开启这个参数也是能生效的，但是相当于全局使用的json都会被修改所以不太敢这么做。所以你们如果只是某个插件想去掉这个转义符，可以稍微修改下这个插件里的json模块引用。

好的，我现在尝试一下，谢谢

[Lewisyixin]

@spacewander Also, could you please evaluate if json.encode_escape_forward_slash can be turned off in apisix.core.json? I met this problem some days ago. https://github.com/apache/apisix/discussions/7606. And backslash really make people headache especially when collecting or parsing logs.

By the way. I have found backslash in not caused by etcd but core.json in (https://github.com/apache/apisix/discussions/7606)

When I add json.encode_escape_forward_slash(false) in apisix.core.json and then create route by api, backslash is no longer exist. But Im not sure if this will bring problems.

[spacewander]

@Lewisyixin Thanks for your suggestion. AFAIK, there is no feature that depends on the escape behavior.

Would you like to submit a PR for this? Thanks!

[henkuaifacai]

@Lewisyixin Thank you. After the configuration, the \ is not available

[uran0sH]

I will work on it. Thanks