[#HTTPHeaders-FindFirst]
= xref:HTTPHeaders.adoc[HTTPHeaders]::FindFirst
:relfileprefix: ../
:mrdocs:

Find the first value stored under a header field‐name.

== Synopsis

Declared in `<httpserver.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
std::optional<std::string>
FindFirst(std::string_view key) const;
----

== Return Value

The value of the first header that matches the provided key nullopt if key is not found

== Parameters

[cols="1,4"]
|===
| Name| Description
| *key* [in]
| The field‐name of the header to search for
|===


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