[#GetQueryParameterFromUri]
= GetQueryParameterFromUri
:mrdocs:

Extract a query‐string parameter value from a request URI.

== Synopsis

Declared in `<httpserver.h>`

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

== Return Value

The parameter value, or nullopt if it is not present.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *uri*
| The request target that may contain a query string.
| *key*
| The parameter name to look up.
|===


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