Conditionally echoing header parts with header_regexp

[francislavoie]

@beha

header not @one-of-ours X-Frame-Options "DENY"

That’s not valid syntax. You can’t use not inline, and you can’t use a named matcher as an argument to another matcher.

Please review the request matcher syntax documentation, it shows what is valid.

That said, to solve your issue, I recommend you read this article:

Composing in the Caddyfile

Web server config files are mostly about expressing HTTP handling logic. Often, various handlers or middlewares need to be “composed” to form a cohesive HTTP handler that returns the desired responses. Structurally, config files are basically limited to two dimensions: rows and columns (or, lines and tokens). Syntactically, a config file’s second dimension can expand into more dimensions or scopes when blocks are opened (which are usually represented by curly braces { } and/or indentation, simi…