refactor: use maud templates and serde_json for directory listings (#367

)

* Use maud templates for directory listings
* Use serde_json to generate JSON formatted directory listings
* Restored previous behavior for file size display in HTML listings
* Reverted changes to JSON directory listings due to a performance regression
* Reinstated changes, not the cause of the performance regression

Cargo.toml

@@ -48,7 +48,7 @@ compression-deflate = ["async-compression/deflate"]
 compression-gzip = ["async-compression/deflate"]
 compression-zstd = ["async-compression/zstd"]
 # Directory listing
-directory-listing = ["humansize", "chrono"]
+directory-listing = ["humansize", "chrono", "maud"]
 # Basic HTTP Authorization
 basic-auth = ["bcrypt"]
 # Fallback Page
@@ -75,13 +75,15 @@ humansize = { version = "2.1", features = ["impl_style"], optional = true }
 hyper = { version = "0.14", features = ["stream", "http1", "http2", "tcp", "server"] }
 lazy_static = "1.4.0"
 listenfd = "1.0"
+maud = { version = "0.26.0", optional = true }
 mime_guess = "2.0"
 percent-encoding = "2.3"
 pin-project = "1.1"
 regex = "1.10"
 rustls-pemfile = { version = "2.1", optional = true }
 serde = { version = "1.0", default-features = false, features = ["derive"] }
 serde_ignored = "0.1"
+serde_json = "1.0"
 serde_repr = "0.1"
 tokio = { version = "1", default-features = false, features = ["rt-multi-thread", "macros", "fs", "io-util", "signal"] }
 tokio-rustls = { version = "0.25", optional = true }