Gsub replace backslash with forward slash

I'm trying to replace a forward slash to back slash using gsub but can't get it to work.

I've tried

gsub => ["message", "/", "\\"]


gsub => ["message", "/", "\"]

The above fails with a parse error.


gsub => ["message", "[/]", "[\\]"]

does the wrong thing by adding the brackets in the substituted string.

Any pointers would be appreciated.


Hi, you need a very tricky substitution :astonished: :grinning:

The only way of achieving it that comes to my mind is to use ruby code directly:

    code => ' event.set("message", event.get("message").gsub("/", "\\") ) '

Be aware that if your output representation escapes special characters (for example Json), you'll see "doubled" backquotes in the result.

I add a link to a message with a related issue to have as reference and another unresolved one that might benefit from this.

That's exactly what I resorted to after many tries. I figured I was doing something wrong as replacing forward slash with backslash is a seemingly simple requirement.


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