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Do not write a value in Context upon failed extraction. (#671)
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@carlosalberto
carlosalberto authored Jul 1, 2020
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4 changes: 2 additions & 2 deletions specification/context/api-propagators.md
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Expand Up @@ -105,8 +105,8 @@ The implemenation SHOULD preserve casing (e.g. it should not transform `Content-
Extracts the value from an incoming request. For example, from the headers of an HTTP request.

If a value can not be parsed from the carrier for a cross-cutting concern,
the implementation MUST NOT throw an exception. It MUST store a value in the `Context`
that the implementation can recognize as a null or empty value.
the implementation MUST NOT throw an exception and MUST NOT store a new value in the `Context`,
in order to preserve any previously existing valid value.

Required arguments:

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