drogue-client 0.11.1

Clients for the Drogue IoT Cloud APIs
Documentation 
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mod r#impl;

pub(crate) use r#impl::CoreClient;

pub trait PropagateCurrentContext {
    fn propagate_current_context(self) -> Self
    where
        Self: Sized;
}

#[cfg(not(feature = "telemetry"))]
impl PropagateCurrentContext for reqwest::RequestBuilder {
    #[inline]
    fn propagate_current_context(self) -> Self
    where
        Self: Sized,
    {
        self
    }
}

#[cfg(feature = "telemetry")]
impl PropagateCurrentContext for reqwest::RequestBuilder {
    #[inline]
    fn propagate_current_context(self) -> Self
    where
        Self: Sized,
    {
        self.propagate_context(&opentelemetry::Context::current())
    }
}

#[cfg(feature = "telemetry")]
pub use self::tracing::*;

#[cfg(feature = "telemetry")]
mod tracing {
    use http::HeaderMap;
    use opentelemetry::propagation::Injector;
    use opentelemetry::Context;
    use reqwest::RequestBuilder;

    pub trait WithTracing {
        fn propagate_context(self, cx: &Context) -> Self;
    }

    impl WithTracing for RequestBuilder {
        fn propagate_context(self, cx: &Context) -> Self {
            let headers = opentelemetry::global::get_text_map_propagator(|prop| {
                let mut injector = HeaderInjector::new();
                prop.inject_context(cx, &mut injector);
                injector.0
            });
            self.headers(headers)
        }
    }

    struct HeaderInjector(HeaderMap);

    impl HeaderInjector {
        pub fn new() -> Self {
            Self(Default::default())
        }
    }

    impl Injector for HeaderInjector {
        /// Set a key and value in the HeaderMap.  Does nothing if the key or value are not valid inputs.
        fn set(&mut self, key: &str, value: String) {
            if let Ok(name) = http::header::HeaderName::from_bytes(key.as_bytes()) {
                if let Ok(val) = http::header::HeaderValue::from_str(&value) {
                    self.0.insert(name, val);
                }
            }
        }
    }
}