Update config.rs

Author: t-aleksander

src/config.rs

@@ -4,6 +4,26 @@ use clap::Parser;
 use log::LevelFilter;
 use serde::Deserialize;
 
+fn default_http_port() -> u16 {
+    8080
+}
+
+fn default_grpc_port() -> u16 {
+    50051
+}
+
+fn default_log_level() -> LevelFilter {
+    LevelFilter::Info
+}
+
+fn default_cert_dir() -> PathBuf {
+    PathBuf::from("/etc/defguard/certs")
+}
+
+fn default_https_port() -> u16 {
+    443
+}
+
 fn default_adoption_timeout() -> u64 {
     10
 }
@@ -18,19 +38,24 @@ pub struct EnvConfig {
         env = "DEFGUARD_PROXY_HTTP_PORT",
         default_value_t = 8080
     )]
+    #[serde(default = "default_http_port")]
     pub http_port: u16,
 
     // port the API server will listen on
     #[arg(long, env = "DEFGUARD_PROXY_GRPC_PORT", default_value_t = 50051)]
+    #[serde(default = "default_grpc_port")]
     pub grpc_port: u16,
 
     #[arg(long, env = "DEFGUARD_PROXY_LOG_LEVEL", default_value_t = LevelFilter::Info)]
+    #[serde(default = "default_log_level")]
     pub log_level: LevelFilter,
 
     #[arg(long, env = "DEFGUARD_PROXY_RATELIMIT_PERSECOND", default_value_t = 0)]
+    #[serde(default)]
     pub rate_limit_per_second: u64,
 
     #[arg(long, env = "DEFGUARD_PROXY_RATELIMIT_BURST", default_value_t = 0)]
+    #[serde(default)]
     pub rate_limit_burst: u32,
 
     /// Configuration file path
@@ -39,9 +64,11 @@ pub struct EnvConfig {
     config_path: Option<PathBuf>,
 
     #[arg(long, env = "DEFGUARD_HTTP_BIND_ADDRESS")]
+    #[serde(default)]
     pub http_bind_address: Option<IpAddr>,
 
     #[arg(long, env = "DEFGUARD_GRPC_BIND_ADDRESS")]
+    #[serde(default)]
     pub grpc_bind_address: Option<IpAddr>,
 
     // TODO: On different platforms this may be different
@@ -50,15 +77,18 @@ pub struct EnvConfig {
         env = "DEFGUARD_PROXY_CERT_DIR",
         default_value = "/etc/defguard/certs"
     )]
+    #[serde(default = "default_cert_dir")]
     pub cert_dir: PathBuf,
 
     /// Port for the HTTPS server. When Core sends TLS certificates over gRPC, the HTTP
     /// server is restarted on this port using those certificates.
     #[arg(long, env = "DEFGUARD_PROXY_HTTPS_PORT", default_value_t = 443)]
+    #[serde(default = "default_https_port")]
     pub https_port: u16,
 
     /// Use Let's Encrypt staging environment for ACME issuance.
     #[arg(long, env = "DEFGUARD_PROXY_ACME_STAGING", default_value_t = false)]
+    #[serde(default)]
     pub acme_staging: bool,
 
     /// Time limit in minutes for the auto-adoption process.