refactor: initial implementation of separeted lib and bin

rpxy-lib/src/globals.rs

@@ -0,0 +1,120 @@
+use crate::{backend::Backends, certs::CryptoSource, constants::*};
+use std::net::SocketAddr;
+use std::sync::{
+  atomic::{AtomicUsize, Ordering},
+  Arc,
+};
+use tokio::time::Duration;
+
+/// Global object containing proxy configurations and shared object like counters.
+/// But note that in Globals, we do not have Mutex and RwLock. It is indeed, the context shared among async tasks.
+pub struct Globals<T>
+where
+  T: CryptoSource,
+{
+  /// Configuration parameters for proxy transport and request handlers
+  pub proxy_config: ProxyConfig, // TODO: proxy configはarcに包んでこいつだけ使いまわせばいいように変えていく。backendsも？
+
+  /// Backend application objects to which http request handler forward incoming requests
+  pub backends: Backends<T>,
+
+  /// Shared context - Counter for serving requests
+  pub request_count: RequestCount,
+
+  /// Shared context - Async task runtime handler
+  pub runtime_handle: tokio::runtime::Handle,
+}
+
+/// Configuration parameters for proxy transport and request handlers
+pub struct ProxyConfig {
+  pub listen_sockets: Vec<SocketAddr>, // when instantiate server
+  pub http_port: Option<u16>,          // when instantiate server
+  pub https_port: Option<u16>,         // when instantiate server
+
+  pub proxy_timeout: Duration,    // when serving requests at Proxy
+  pub upstream_timeout: Duration, // when serving requests at Handler
+
+  pub max_clients: usize,          // when serving requests
+  pub max_concurrent_streams: u32, // when instantiate server
+  pub keepalive: bool,             // when instantiate server
+
+  // experimentals
+  pub sni_consistency: bool, // Handler
+  // All need to make packet acceptor
+  #[cfg(feature = "http3")]
+  pub http3: bool,
+  #[cfg(feature = "http3")]
+  pub h3_alt_svc_max_age: u32,
+  #[cfg(feature = "http3")]
+  pub h3_request_max_body_size: usize,
+  #[cfg(feature = "http3")]
+  pub h3_max_concurrent_bidistream: quinn::VarInt,
+  #[cfg(feature = "http3")]
+  pub h3_max_concurrent_unistream: quinn::VarInt,
+  #[cfg(feature = "http3")]
+  pub h3_max_concurrent_connections: u32,
+  #[cfg(feature = "http3")]
+  pub h3_max_idle_timeout: Option<quinn::IdleTimeout>,
+}
+
+impl Default for ProxyConfig {
+  fn default() -> Self {
+    Self {
+      listen_sockets: Vec::new(),
+      http_port: None,
+      https_port: None,
+
+      // TODO: Reconsider each timeout values
+      proxy_timeout: Duration::from_secs(PROXY_TIMEOUT_SEC),
+      upstream_timeout: Duration::from_secs(UPSTREAM_TIMEOUT_SEC),
+
+      max_clients: MAX_CLIENTS,
+      max_concurrent_streams: MAX_CONCURRENT_STREAMS,
+      keepalive: true,
+
+      sni_consistency: true,
+
+      #[cfg(feature = "http3")]
+      http3: false,
+      #[cfg(feature = "http3")]
+      h3_alt_svc_max_age: H3::ALT_SVC_MAX_AGE,
+      #[cfg(feature = "http3")]
+      h3_request_max_body_size: H3::REQUEST_MAX_BODY_SIZE,
+      #[cfg(feature = "http3")]
+      h3_max_concurrent_connections: H3::MAX_CONCURRENT_CONNECTIONS,
+      #[cfg(feature = "http3")]
+      h3_max_concurrent_bidistream: H3::MAX_CONCURRENT_BIDISTREAM.into(),
+      #[cfg(feature = "http3")]
+      h3_max_concurrent_unistream: H3::MAX_CONCURRENT_UNISTREAM.into(),
+      #[cfg(feature = "http3")]
+      h3_max_idle_timeout: Some(quinn::IdleTimeout::try_from(Duration::from_secs(H3::MAX_IDLE_TIMEOUT)).unwrap()),
+    }
+  }
+}
+
+#[derive(Debug, Clone, Default)]
+/// Counter for serving requests
+pub struct RequestCount(Arc<AtomicUsize>);
+
+impl RequestCount {
+  pub fn current(&self) -> usize {
+    self.0.load(Ordering::Relaxed)
+  }
+
+  pub fn increment(&self) -> usize {
+    self.0.fetch_add(1, Ordering::Relaxed)
+  }
+
+  pub fn decrement(&self) -> usize {
+    let mut count;
+    while {
+      count = self.0.load(Ordering::Relaxed);
+      count > 0
+        && self
+          .0
+          .compare_exchange(count, count - 1, Ordering::Relaxed, Ordering::Relaxed)
+          != Ok(count)
+    } {}
+    count
+  }
+}