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diff --git a/shared/grpc_clients/.gitignore b/shared/grpc_clients/.gitignore
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--- /dev/null
+++ b/shared/grpc_clients/.gitignore
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diff --git a/shared/grpc_clients/Cargo.lock b/shared/grpc_clients/Cargo.lock
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diff --git a/shared/grpc_clients/Cargo.toml b/shared/grpc_clients/Cargo.toml
new file mode 100644
--- /dev/null
+++ b/shared/grpc_clients/Cargo.toml
@@ -0,0 +1,14 @@
+[package]
+name = "grpc_clients"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+derive_more = "0.99"
+prost = "0.11"
+tonic = { version = "0.9.1", features = ["tls"]}
+tracing = "0.1"
+tracing-subscriber = { version = "0.3.16", features = ["env-filter"] }
+
+[build-dependencies]
+tonic-build = "0.9.1"
diff --git a/shared/grpc_clients/build.rs b/shared/grpc_clients/build.rs
new file mode 100644
--- /dev/null
+++ b/shared/grpc_clients/build.rs
@@ -0,0 +1,12 @@
+fn main() {
+ tonic_build::configure()
+ .build_server(false)
+ .compile(
+ &[
+ "../protos/identity_client.proto",
+ "../protos/identity_authenticated.proto",
+ ],
+ &["../protos"],
+ )
+ .unwrap_or_else(|e| panic!("Failed to compile protos {:?}", e));
+}
diff --git a/shared/grpc_clients/src/error.rs b/shared/grpc_clients/src/error.rs
new file mode 100644
--- /dev/null
+++ b/shared/grpc_clients/src/error.rs
@@ -0,0 +1,11 @@
+use tonic::codegen::http::uri::InvalidUri;
+
+#[derive(
+ Debug, derive_more::Display, derive_more::From, derive_more::Error,
+)]
+pub enum Error {
+ #[display(...)]
+ TransportError(tonic::transport::Error),
+ #[display(...)]
+ InvalidUri(InvalidUri),
+}
diff --git a/shared/grpc_clients/src/identity/authenticated.rs b/shared/grpc_clients/src/identity/authenticated.rs
new file mode 100644
--- /dev/null
+++ b/shared/grpc_clients/src/identity/authenticated.rs
@@ -0,0 +1,60 @@
+use super::protos::authenticated::identity_client_service_client::IdentityClientServiceClient as AuthClient;
+use tonic::{
+ codegen::InterceptedService,
+ metadata::{errors::InvalidMetadataValue, Ascii, MetadataValue},
+ service::Interceptor,
+ transport::Channel,
+ Request, Status,
+};
+
+use crate::error::Error;
+
+pub struct AuthLayer {
+ user_id: String,
+ device_id: String,
+ access_token: String,
+}
+
+trait ToMetadataValueAscii {
+ fn parse_to_ascii(&self) -> Result<MetadataValue<Ascii>, Status>;
+}
+
+impl ToMetadataValueAscii for str {
+ fn parse_to_ascii(&self) -> Result<MetadataValue<Ascii>, Status> {
+ self.parse().map_err(|e: InvalidMetadataValue| {
+ Status::invalid_argument(format!(
+ "Non-Ascii character present in metadata value: {}",
+ e
+ ))
+ })
+ }
+}
+
+impl Interceptor for AuthLayer {
+ fn call(&mut self, mut request: Request<()>) -> Result<Request<()>, Status> {
+ let metadata = request.metadata_mut();
+ metadata.insert("user_id", self.user_id.parse_to_ascii()?);
+ metadata.insert("device_id", self.device_id.parse_to_ascii()?);
+ metadata.insert("access_token", self.access_token.parse_to_ascii()?);
+
+ Ok(request)
+ }
+}
+pub async fn get_auth_client(
+ url: &str,
+ user_id: String,
+ device_id: String,
+ access_token: String,
+) -> Result<AuthClient<InterceptedService<Channel, AuthLayer>>, Error> {
+ use super::get_identity_service_channel;
+
+ let channel = get_identity_service_channel(url).await?;
+
+ let interceptor = AuthLayer {
+ user_id,
+ device_id,
+ access_token,
+ };
+
+ Ok(AuthClient::with_interceptor(channel, interceptor))
+}
diff --git a/shared/grpc_clients/src/identity/mod.rs b/shared/grpc_clients/src/identity/mod.rs
new file mode 100644
--- /dev/null
+++ b/shared/grpc_clients/src/identity/mod.rs
@@ -0,0 +1,40 @@
+pub mod authenticated;
+pub mod unauthenticated;
+
+pub mod protos {
+ // This must be named client for authenticated generated code
+ pub mod client {
+ tonic::include_proto!("identity.client");
+ }
+ pub use client as unauthenticated;
+
+ pub mod authenticated {
+ tonic::include_proto!("identity.authenticated");
+ }
+}
+
+use crate::error::Error;
+use tonic::transport::Channel;
+use tonic::transport::{Certificate, ClientTlsConfig};
+use tracing::{self, info};
+
+pub use authenticated::get_auth_client;
+pub use unauthenticated::get_unauthenticated_client;
+
+pub(crate) async fn get_identity_service_channel(
+ url: &str,
+) -> Result<Channel, Error> {
+ let ca_cert = crate::get_ca_cert_contents().expect("Unable to get CA bundle");
+
+ info!("Connecting to identity service at {}", url);
+ let mut channel = Channel::from_shared(url.to_string())?;
+
+ // tls_config will fail if the underlying URI is only http://
+ if url.starts_with("https:") {
+ channel = channel.tls_config(
+ ClientTlsConfig::new().ca_certificate(Certificate::from_pem(&ca_cert)),
+ )?
+ }
+
+ Ok(channel.connect().await?)
+}
diff --git a/shared/grpc_clients/src/identity/unauthenticated.rs b/shared/grpc_clients/src/identity/unauthenticated.rs
new file mode 100644
--- /dev/null
+++ b/shared/grpc_clients/src/identity/unauthenticated.rs
@@ -0,0 +1,11 @@
+use tonic::transport::Channel;
+
+use super::protos::client::identity_client_service_client::IdentityClientServiceClient;
+use crate::error::Error;
+
+pub async fn get_unauthenticated_client(
+ url: &str,
+) -> Result<IdentityClientServiceClient<Channel>, Error> {
+ let channel = super::get_identity_service_channel(url).await?;
+ Ok(IdentityClientServiceClient::new(channel))
+}
diff --git a/shared/grpc_clients/src/lib.rs b/shared/grpc_clients/src/lib.rs
new file mode 100644
--- /dev/null
+++ b/shared/grpc_clients/src/lib.rs
@@ -0,0 +1,21 @@
+pub mod error;
+pub mod identity;
+
+use std::path::Path;
+
+const CERT_PATHS: &'static [&'static str] = &[
+ // MacOS and newer Ubuntu
+ "/etc/ssl/cert.pem",
+ // Common CA cert paths
+ "/etc/ssl/certs/ca-bundle.crt",
+ "/etc/ssl/certs/ca-certificates.crt",
+];
+
+pub(crate) fn get_ca_cert_contents() -> Option<String> {
+ CERT_PATHS
+ .iter()
+ .map(Path::new)
+ .filter(|p| p.exists())
+ .filter_map(|f| std::fs::read_to_string(f).ok())
+ .next()
+}

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