add log

hyperrs/Cargo.toml

@@ -7,6 +7,8 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+log = { version = "0.4", features = ["max_level_debug", "release_max_level_warn"] }
+pretty_env_logger = "0.4"
 hyper = "0.13"
 tokio = { version = "0.2", features = ["full"] }