feat: create an grpc server

7 files changed, 1087 insertions, 7 deletions

diff --git a/Cargo.lock b/Cargo.lock
index d9da949..2be68e7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3,5 +3,1016 @@
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+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
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+dependencies = [
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diff --git a/Cargo.toml b/Cargo.toml
index d75ace8..c754359 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,4 +3,18 @@ name = "authzd"
 version = "0.1.0"
 edition = "2024"
 
+[[bin]]
+name = "helloworld-server"
+path = "src/server.rs"
+
+[[bin]]
+name = "helloworld-client"
+path = "src/client.rs"
+
 [dependencies]
+prost = "0.13"
+tokio = { version = "1.0", features = ["macros", "rt-multi-thread"] }
+tonic = "*"
+
+[build-dependencies]
+tonic-build = "*"
diff --git a/Makefile b/Makefile
index bfeeae3..9cc9188 100644
--- a/Makefile
+++ b/Makefile
@@ -1,16 +1,16 @@
 .PHONY: help
 help:
 	@echo "Available targets:"
-	@echo "  run           - Run the Server"
+	@echo "  server        - Run the gRPC server"
 	@echo "  test          - Run the tests"
 
 .PHONY: clean
 clean:
 	@cargo clean
 
-.PHONY: run
-run:
-	@cargo run
+.PHONY: server
+server:
+	@cargo run --bin helloworld-server
 
 .PHONY: test
 test:
diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000..7c661fe
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,4 @@
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    tonic_build::compile_protos("proto/helloworld.proto")?;
+    Ok(())
+}
diff --git a/proto/helloworld.proto b/proto/helloworld.proto
new file mode 100644
index 0000000..949b755
--- /dev/null
+++ b/proto/helloworld.proto
@@ -0,0 +1,14 @@
+syntax = "proto3";
+package helloworld;
+
+service Greeter {
+  rpc SayHello (HelloRequest) returns (HelloReply);
+}
+
+message HelloRequest {
+  string name = 1;
+}
+
+message HelloReply {
+  string message = 1;
+}
diff --git a/src/main.rs b/src/main.rs
deleted file mode 100644
index e7a11a9..0000000
--- a/src/main.rs
+++ /dev/null
@@ -1,3 +0,0 @@
-fn main() {
-    println!("Hello, world!");
-}
diff --git a/src/server.rs b/src/server.rs
new file mode 100644
index 0000000..d6a8bca
--- /dev/null
+++ b/src/server.rs
@@ -0,0 +1,40 @@
+use tonic::{Request, Response, Status, transport::Server};
+
+use hello_world::greeter_server::{Greeter, GreeterServer};
+use hello_world::{HelloReply, HelloRequest};
+
+pub mod hello_world {
+    tonic::include_proto!("helloworld");
+}
+
+#[derive(Debug, Default)]
+pub struct MyGreeter {}
+
+#[tonic::async_trait]
+impl Greeter for MyGreeter {
+    async fn say_hello(
+        &self,
+        request: Request<HelloRequest>,
+    ) -> Result<Response<HelloReply>, Status> {
+        println!("Got a request: {:?}", request);
+
+        let reply = HelloReply {
+            message: format!("Hello {}!", request.into_inner().name),
+        };
+
+        Ok(Response::new(reply))
+    }
+}
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let addr = "[::1]:50051".parse()?;
+    let greeter = MyGreeter::default();
+
+    Server::builder()
+        .add_service(GreeterServer::new(greeter))
+        .serve(addr)
+        .await?;
+
+    Ok(())
+}