opentelemetry_http

Struct HeaderExtractor

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pub struct HeaderExtractor<'a>(pub &'a HeaderMap);
Expand description

Helper for extracting headers from HTTP Requests. This is used for OpenTelemetry context propagation over HTTP. See this for example usage.

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§0: &'a HeaderMap

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impl<'a> Extractor for HeaderExtractor<'a>

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fn get(&self, key: &str) -> Option<&str>

Get a value for a key from the HeaderMap. If the value is not valid ASCII, returns None.

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fn keys(&self) -> Vec<&str>

Collect all the keys from the HeaderMap.

Auto Trait Implementations§

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impl<'a> Freeze for HeaderExtractor<'a>

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impl<'a> RefUnwindSafe for HeaderExtractor<'a>

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impl<'a> Send for HeaderExtractor<'a>

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impl<'a> Sync for HeaderExtractor<'a>

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impl<'a> Unpin for HeaderExtractor<'a>

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impl<'a> UnwindSafe for HeaderExtractor<'a>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> FutureExt for T

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fn with_context(self, otel_cx: Context) -> WithContext<Self>

Attaches the provided Context to this type, returning a WithContext wrapper. Read more
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fn with_current_context(self) -> WithContext<Self>

Attaches the current Context to this type, returning a WithContext wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.