26 lines
805 B
ReStructuredText
26 lines
805 B
ReStructuredText
.. _-headerValueByName-:
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headerValueByName
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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: headerValueByName
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Description
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-----------
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Extracts the value of the HTTP request header with the given name.
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The name can be given as a ``String`` or as a ``Symbol``. If no header with a matching name is found the request
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is rejected with a ``MissingHeaderRejection``.
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If the header is expected to be missing in some cases or to customize
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handling when the header is missing use the :ref:`-optionalHeaderValueByName-` directive instead.
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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: headerValueByName-0
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