Extract the User-Agent from HTTP request

[ashishmgupta]

Below the excerpt from my HTTP request and I'm trying to get the User-Agent value from it and so far not successful. Will appreciate any help.

This Splunk editor is removing the carriage return and line feed characters so below is the regex101 link.https://regex101.com/r/rdu8yE/1

Also attached is the screenshot of the HTTP request.

[ashishmgupta · Accepted solution]

looks like 4 backslashes to get two? Below worked. Thank you for your help. 

User-Agent: (?<UserAgent>[^\\\\]*)

[richgalloway]

Your regex was very close.  This worked for me using the one example:

User-Agent: (?<UserAgent>[^\\]*)

[ashishmgupta]

Error in 'rex' command: Encountered the following error while compiling the regex 'User-Agent: (?<UserAgent>[^\]*)': Regex: missing terminating ] for character class.

[richgalloway]

To use backslashes in a regex in SPL you have to escape them.

User-Agent: (?<UserAgent>[^\\\\\\]*)

Yes, that's 6 backslashes to get two.