2015-05-11 23:05:18 +02:00
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.. _-respondWithDefaultHeaders-:
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respondWithDefaultHeaders
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=========================
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Adds the given HTTP headers to all responses coming back from its inner route only if a respective header with the same
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name doesn't exist yet in the response.
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Signature
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---------
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2015-06-19 15:35:24 +02:00
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.. includecode2:: /../../akka-http/src/main/scala/akka/http/scaladsl/server/directives/RespondWithDirectives.scala
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2015-05-11 23:05:18 +02:00
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:snippet: respondWithDefaultHeaders
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Description
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-----------
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This directive transforms ``HttpResponse`` and ``ChunkedResponseStart`` messages coming back from its inner route by
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potentially adding the given ``HttpHeader`` instances to the headers list.
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A header is only added if there is no header instance with the same name (case insensitively) already present in the
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response. If you'd like to add only a single header you can use the :ref:`-respondWithDefaultHeader-` directive instead.
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Example
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-------
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See the :ref:`-respondWithDefaultHeader-` directive for an example with only one header.
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