topic Regex not working in Dashboards & Visualizations

Regex not working

Deprasad — Fri, 08 Jan 2021 09:16:55 GMT

Trying to Pick domainType and domainName from below log using the below regex:

It works in regex101 but not in Splunk, it gives a blank column.

domainName - rex"(?:domainName\\\"\:\\\")(?<domainName>([a-zA-Z0-9-\.]+))"
domainType - rex"(?:domainType\\\"\:\\\")(?<domainType>\w)"



"payload":"{\"domainType\":\"L\",\"modifiedBy\":\"\",\"relayHost\":\"\",\"rewriteDomain\":\"\",\"wildcardAccount\":\"\",\"domainName\":\"xxx.yyyyy.com\"}"},"encoding":null,"contentType":"application/json","responseCode":null}

Re: Regex not working

gcusello — Fri, 08 Jan 2021 09:42:08 GMT

Hi @Deprasad,

please try this:

| rex "domainType\":\"(?<domainType>[^\"]*).*domainName\":\"(?<domainName>[^\"]*)"

that you can test at https://regex101.com/r/4QfKNj/1

Ciao.

Giuseppe

Re: Regex not working

ITWhisperer — Fri, 08 Jan 2021 09:46:16 GMT

Rex in splunk requires more escaping for backslashes than regex101

| makeresults | eval _raw="\"payload\":\"{\\\"domainType\\\":\\\"L\\\",\\\"modifiedBy\\\":\\\"\\\",\\\"relayHost\\\":\\\"\\\",\\\"rewriteDomain\\\":\\\"\\\",\\\"wildcardAccount\\\":\\\"\\\",\\\"domainName\\\":\\\"xxx.yyyyy.com\\\"}\"},\"encoding\":null,\"contentType\":\"application/json\",\"responseCode\":null} " | rex "(?:domainName\\\\\"\:\\\\\")(?<domainName>([a-zA-Z0-9-\.]+))" | rex "(?:domainType\\\\\"\:\\\\\")(?<domainType>\w)"

Re: Regex not working

saravanan90 — Fri, 08 Jan 2021 09:47:05 GMT

Below may help you..

|makeresults | eval _raw="\"payload\":\"{\\\"domainType\\\":\\\"L\\\",\\\"modifiedBy\\\":\\\"\\\",\\\"relayHost\\\":\\\"\\\",\\\"rewriteDomain\\\":\\\"\\\",\\\"wildcardAccount\\\":\\\"\\\",\\\"domainName\\\":\\\"xxx.yyyyy.com\\\"}\"},\"encoding\":null,\"contentType\":\"application/json\",\"responseCode\":null}\"" | rex field=_raw "domainType\\\\\":\\\\\"(?<domainType>[^\\\\\"]+).+domainName\\\\\":\\\\\"(?<domainname>[^\\\\\"]+)"

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Re: Regex not working

Deprasad — Fri, 08 Jan 2021 11:16:46 GMT

Thanks!! that's worked. 🙂

Re: Regex not working

Deprasad — Fri, 08 Jan 2021 11:20:21 GMT

Thanks!! The payload you used in the regex101 is not same as the provided.
Though it worked in Regex101, still faced the same issue with Splunk. Tried the solution suggested by @ITWhisperer and it worked.