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docs: mention placeholders in reverse_proxy context #506

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Oct 27, 2025
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docs: mention placeholders in reverse_proxy context #506

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docs: mention placeholders in reverse_proxy context
steffenbusch Oct 27, 2025
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2 changes: 1 addition & 1 deletion src/docs/markdown/conventions.md
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Expand Up @@ -90,7 +90,7 @@ Placeholders are a similar idea to variables in other software. For example, [ng

Placeholders are bounded on either side by curly braces `{ }` and contain the identifier inside, for example: `{foo.bar}`. The opening placeholder brace can be escaped `\{like.this}` to prevent replacement. Placeholder identifiers are typically namespaced with dots to avoid collisions across modules.

Which placeholders are available depends on the context. Not all placeholders are available in all parts of the config. For example, [the HTTP app sets placeholders](/docs/json/apps/http/#docs) that are only available in areas of the config related to handling HTTP requests.
Which placeholders are available depends on the context. Not all placeholders are available in all parts of the config. For example, [the HTTP app sets placeholders](/docs/json/apps/http/#docs) that are only available in areas of the config related to handling HTTP requests. When a request passes through the [reverse_proxy handler](/docs/json/apps/http/servers/routes/handle/reverse_proxy/#docs), the handler sets several proxy-specific placeholders. These placeholders may be referenced during proxying as well as afterwards, for example when setting response headers or enriching access logs.

The following placeholders are always available (global):

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