27 lines
811 B
ReStructuredText
27 lines
811 B
ReStructuredText
.. _-headerValuePF-:
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headerValuePF
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=============
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Signature
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---------
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.. includecode2:: /../../akka-http/src/main/scala/akka/http/scaladsl/server/directives/HeaderDirectives.scala
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:snippet: headerValuePF
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Description
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-----------
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Calls the specified partial function with the first request header the function is ``isDefinedAt`` and extracts the
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result of calling the function.
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The ``headerValuePF`` directive is an alternative syntax version of :ref:`-headerValue-`.
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If the function throws an exception the request is rejected with a ``MalformedHeaderRejection``.
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If the function is not defined for any header the request is rejected as "NotFound".
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Example
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-------
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.. includecode2:: ../../../../code/docs/http/scaladsl/server/directives/HeaderDirectivesExamplesSpec.scala
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:snippet: headerValuePF-0
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