feat: implementation of collector http client with pure hyper

Cargo.toml

@@ -18,6 +18,7 @@ members = [
     "opentelemetry-zpages",
     "examples/actix-http",
     "examples/actix-http-tracing",
+    "examples/actix-hyper",
     "examples/actix-udp",
     "examples/async",
     "examples/aws-xray",

examples/actix-hyper/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "actix-hyper-example"
+version = "0.1.0"
+edition = "2018"
+publish = false
+
+[dependencies]
+opentelemetry = { path = "../../opentelemetry", features = ["rt-tokio"] }
+opentelemetry-jaeger = { path = "../../opentelemetry-jaeger", features = ["hyper_collector_client", "rt-tokio-current-thread"] }
+actix-web = "4.1.0"
+actix-service = "2.0.0"
+env_logger = "0.9.0"
+tokio = { version = "1", features = ["full"] }

examples/actix-hyper/README.md

@@ -0,0 +1,24 @@
+# Actix-web - Jaeger example with HTTP collector and batch exporter 
+
+This example shows how to export spans from an actix-web application and ship them
+ to the collector directly via HTTP.  
+ It uses the batch exporter to avoid excessive network roundtrips to Jaeger.
+
+## Usage
+
+Launch the application:
+```shell
+# Run jaeger in background
+$ docker run -d -p6831:6831/udp -p6832:6832/udp -p16686:16686 -p14268:14268 jaegertracing/all-in-one:latest
+
+# Start the actix-web server 
+$ cargo run
+
+# View spans
+$ firefox http://localhost:16686/
+```
+
+Fire a request:
+```bash
+curl http://localhost:8088
+```

examples/actix-hyper/src/main.rs

@@ -0,0 +1,56 @@
+use actix_service::Service;
+use actix_web::middleware::Logger;
+use actix_web::{web, App, HttpServer};
+use opentelemetry::global::shutdown_tracer_provider;
+use opentelemetry::trace::TraceError;
+use opentelemetry::{global, sdk::trace as sdktrace};
+use opentelemetry::{
+    trace::{FutureExt, TraceContextExt, Tracer},
+    Key,
+};
+
+fn init_tracer() -> Result<sdktrace::Tracer, TraceError> {
+    opentelemetry_jaeger::new_collector_pipeline()
+        .with_endpoint("http://127.0.0.1:14268/api/traces")
+        .with_service_name("trace-http-demo")
+        .with_hyper()
+        .install_batch(opentelemetry::runtime::TokioCurrentThread)
+}
+
+async fn index() -> &'static str {
+    let tracer = global::tracer("request");
+    tracer.in_span("index", |ctx| {
+        ctx.span().set_attribute(Key::new("parameter").i64(10));
+        "Index"
+    })
+}
+
+#[actix_web::main]
+async fn main() -> std::io::Result<()> {
+    std::env::set_var("RUST_LOG", "debug");
+    env_logger::init();
+    let tracer = init_tracer().expect("Failed to initialise tracer.");
+
+    HttpServer::new(move || {
+        let tracer = tracer.clone();
+        App::new()
+            .wrap(Logger::default())
+            .wrap_fn(move |req, srv| {
+                tracer.in_span("middleware", move |cx| {
+                    cx.span()
+                        .set_attribute(Key::new("path").string(req.path().to_string()));
+                    srv.call(req).with_context(cx)
+                })
+            })
+            .route("/", web::get().to(index))
+    })
+    .bind("127.0.0.1:8088")
+    .unwrap()
+    .run()
+    .await?;
+
+    // wait until all pending spans get exported.
+    shutdown_tracer_provider();
+
+    Ok(())
+}

opentelemetry-dynatrace/src/metric.rs

@@ -1,6 +1,6 @@
 //! Dynatrace Metric Exporter.
 //!
-//! Defines an [Exporter] to send metric data to Dynatrace using the [Dynatrace Metrics ingestion protocol].
+//! Defines an `Exporter` to send metric data to Dynatrace using the [Dynatrace Metrics ingestion protocol].
 //!
 //! [Metrics ingestion protocol]: https://www.dynatrace.com/support/help/how-to-use-dynatrace/metrics/metric-ingestion/metric-ingestion-protocol/
 #![allow(unused_attributes)]
@@ -236,7 +236,7 @@ where
 
     /// Set the timestamp to all metric data.
     /// If disabled, the ingestion time of the Dynatrace server will be used automatically.
-    /// Adding timestamps should be disabled in environments, where the system time is unrelible.
+    /// Adding timestamps should be disabled in environments, where the system time is unreliable.
     pub fn with_timestamp(self, value: bool) -> Self {
         DynatraceMetricsPipeline {
             timestamp: value,

opentelemetry-http/Cargo.toml

@@ -12,7 +12,9 @@ edition = "2018"
 async-trait = "0.1"
 bytes = "1"
 http = "0.2"
+hyper = { version = "0.14", default-features = false, features = ["http2", "client", "tcp"], optional = true }
 isahc = { version = "1.4", default-features = false, optional = true }
 opentelemetry-api = { version = "0.1", path = "../opentelemetry-api" }
 reqwest = { version = "0.11", default-features = false, features = ["blocking"], optional = true }
 surf = { version = "2.0", default-features = false, optional = true }
+tokio = { version = "1.0", default-features = false, features = ["time"], optional = true }

opentelemetry-http/src/lib.rs

@@ -87,9 +87,25 @@ mod reqwest {
 }
 
 #[cfg(feature = "surf")]
-mod surf {
+pub mod surf {
     use super::{async_trait, Bytes, HttpClient, HttpError, Request, Response};
 
+    #[derive(Debug)]
+    pub struct BasicAuthMiddleware(pub surf::http::auth::BasicAuth);
+
+    #[async_trait]
+    impl surf::middleware::Middleware for BasicAuthMiddleware {
+        async fn handle(
+            &self,
+            mut req: surf::Request,
+            client: surf::Client,
+            next: surf::middleware::Next<'_>,
+        ) -> surf::Result<surf::Response> {
+            req.insert_header(self.0.name(), self.0.value());
+            next.run(req, client).await
+        }
+    }
+
     #[async_trait]
     impl HttpClient for surf::Client {
         async fn send(&self, request: Request<Vec<u8>>) -> Result<Response<Bytes>, HttpError> {
@@ -132,6 +148,66 @@ mod isahc {
     }
 }
 
+#[cfg(any(feature = "hyper", feature = "hyper_tls"))]
+pub mod hyper {
+    use super::{async_trait, Bytes, HttpClient, HttpError, Request, Response};
+    use http::HeaderValue;
+    use hyper::client::connect::Connect;
+    use hyper::Client;
+    use std::fmt::Debug;
+    use std::time::Duration;
+    use tokio::time;
+
+    #[derive(Debug, Clone)]
+    pub struct HyperClient<C> {
+        inner: Client<C>,
+        timeout: Duration,
+        authorization: Option<HeaderValue>,
+    }
+
+    impl<C> HyperClient<C> {
+        pub fn new_with_timeout(inner: Client<C>, timeout: Duration) -> Self {
+            Self {
+                inner,
+                timeout,
+                authorization: None,
+            }
+        }
+
+        pub fn new_with_timeout_and_authorization_header(
+            inner: Client<C>,
+            timeout: Duration,
+            authorization: HeaderValue,
+        ) -> Self {
+            Self {
+                inner,
+                timeout,
+                authorization: Some(authorization),
+            }
+        }
+    }
+
+    #[async_trait]
+    impl<C> HttpClient for HyperClient<C>
+    where
+        C: Connect + Send + Sync + Clone + Debug + 'static,
+    {
+        async fn send(&self, request: Request<Vec<u8>>) -> Result<Response<Bytes>, HttpError> {
+            let (parts, body) = request.into_parts();
+            let mut request = Request::from_parts(parts, body.into());
+            if let Some(ref authorization) = self.authorization {
+                request
+                    .headers_mut()
+                    .insert(http::header::AUTHORIZATION, authorization.clone());
+            }
+            let response = time::timeout(self.timeout, self.inner.request(request)).await??;
+            Ok(Response::builder()
+                .status(response.status())
+                .body(hyper::body::to_bytes(response.into_body()).await?)?)
+        }
+    }
+}
+
 /// Methods to make working with responses from the [`HttpClient`] trait easier.
 pub trait ResponseExt: Sized {
     /// Turn a response into an error if the HTTP status does not indicate success (200 - 299).

opentelemetry-jaeger/Cargo.toml

@@ -27,6 +27,8 @@ futures-util = { version = "0.3", default-features = false, features = ["std"],
 futures-executor = "0.3"
 headers = { version = "0.3.2", optional = true }
 http = { version = "0.2", optional = true }
+hyper = { version = "0.14", default-features = false, features = ["client"], optional = true }
+hyper-tls = { version = "0.5.0", default-features = false, optional = true }
 isahc = { version = "1.4", default-features = false, optional = true }
 js-sys = { version = "0.3", optional = true }
 once_cell = "1.12"
@@ -68,9 +70,12 @@ optional = true
 [features]
 full = [
     "collector_client",
+    "hyper_collector_client",
+    "hyper_tls_collector_client",
     "isahc_collector_client",
     "reqwest_collector_client",
     "reqwest_blocking_collector_client",
+    "reqwest_rustls_collector_client",
     "surf_collector_client",
     "wasm_collector_client",
     "rt-tokio",
@@ -80,6 +85,8 @@ full = [
 ]
 default = []
 collector_client = ["http", "opentelemetry-http"]
+hyper_collector_client = ["collector_client", "headers", "http", "hyper", "opentelemetry-http/tokio", "opentelemetry-http/hyper"]
+hyper_tls_collector_client = ["hyper_collector_client", "hyper-tls"]
 isahc_collector_client = ["isahc", "opentelemetry-http/isahc"]
 reqwest_blocking_collector_client = ["reqwest/blocking", "collector_client", "headers", "opentelemetry-http/reqwest"]
 reqwest_collector_client = ["reqwest", "collector_client", "headers", "opentelemetry-http/reqwest"]
@@ -98,4 +105,4 @@ wasm_collector_client = [
 rt-tokio = ["tokio", "opentelemetry/rt-tokio"]
 rt-tokio-current-thread = ["tokio", "opentelemetry/rt-tokio-current-thread"]
 rt-async-std = ["async-std", "opentelemetry/rt-async-std"]
-integration_test = ["tonic", "prost", "prost-types", "rt-tokio", "collector_client", "reqwest_collector_client", "surf_collector_client", "isahc_collector_client"]
+integration_test = ["tonic", "prost", "prost-types", "rt-tokio", "collector_client", "hyper_collector_client", "hyper_tls_collector_client", "reqwest_collector_client", "surf_collector_client", "isahc_collector_client"]

opentelemetry-jaeger/README.md

@@ -109,6 +109,7 @@ Then you can use the [`with_collector_endpoint`] method to specify the endpoint:
 
 ```rust
 // Note that this requires one of the following features enabled so that there is a default http client implementation
+// * hyper_collector_client
 // * surf_collector_client
 // * reqwest_collector_client
 // * reqwest_blocking_collector_client