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src/docs/markdown/caddyfile/directives/request_header.md

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+---
+title: request_header (Caddyfile directive)
+---
+
+# request_header
+
+Manipulates HTTP header fields on the request. It can set, add, and delete header values, or perform replacements using regular expressions.
+
+
+## Syntax
+
+```
+request_header [<matcher>] [[+|-]<field> [<value>|<find>] [<replace>]]
+```
+
+- **&lt;field&gt;** is the name of the header field. By default, will overwrite any existing field of the same name. Prefix with `+` to add the field instead of replace, or prefix with `-` to remove the field.
+- **&lt;value&gt;** is the header field value, if adding or setting a field.
+- **&lt;find&gt;** is the substring or regular expression to search for.
+- **&lt;replace&gt;** is the replacement value; required if performing a search-and-replace.
+
+
+## Examples
+
+Remove the Referer header from the request:
+
+```
+request_header -Referer
+```