Format unicode characters in json input

[vstariradev]

We're trying to index json formatted logs from kubernetes pods by removing the json formatting and making the logs appear like normal syslog input.

Using the below lines in props.conf:

SHOULD_LINEMERGE = false
SEDCMD-1_unjsonify = s/{"log":"(?:\\u[0-9]+)?(.*?)\\n","stream.*/\1/g
SEDCMD-2_unescapequotes = s/\\"/"/g
BREAK_ONLY_BEFORE={"logname":

We managed to transform the indexed logs from this:

{"log":"2019-07-18T14:11:48+00:00 kubernetes location1 0.0.0.0 - - [18/Jul/2019:14:11:48 +0000] \"GET /saml2/idp/sso?sp=something.com\u0026RelayState=https://something.something.com/URL/paths HTTP/1.1\" 200 2808 \"-\" \"jmeter\" \"something.something.com\" \"0.0.0.0\" 15982 \"95931E90-49DC-462D-B29F-86AF681A6B3B\"\n","stream":"stdout","time":"2019-07-18T14:11:48.485908193Z"}

to this:

2019-06-13T07:33:53+00:00 kubernetes location1 0.0.0.0
- - [13/Jun/2019:07:33:53 +0000] "POST /saml2/sp/acs/oac.something.com HTTP/1.1" 200 5573 "https://something.else.com/saml2/idp/sso?sp=something.com\u0026RelayState=https%3A%2F%2Fsomething.else.com%2Fadmin%2F" "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:67.0) Gecko/20100101 Firefox/67.0" "something.something.com" "0.0.0.0" 9109 "A088E5DB-311C-400E-8AE9-A7B74CA7365C"

However, we get unconverted unicode characters like \u0026, %3A and %2F.

How can we convert them to normal unicode characters?

Thanks