minify: minify html on the fly in release mode

Cargo.lock

@@ -354,6 +354,12 @@ version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "13418e745008f7349ec7e449155f419a61b92b58a99cc3616942b926825ec76b"
 
+[[package]]
+name = "convert_case"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6245d59a3e82a7fc217c5828a6692dbc6dfb63a0c8c90495621f7b9d79704a0e"
+
 [[package]]
 name = "cookie"
 version = "0.17.0"
@@ -455,6 +461,17 @@ dependencies = [
  "typenum",
 ]
 
+[[package]]
+name = "css-minify"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "874c6e2d19f8d4a285083b11a3241bfbe01ac3ed85f26e1e6b34888d960552bd"
+dependencies = [
+ "derive_more",
+ "indexmap",
+ "nom",
+]
+
 [[package]]
 name = "cxx"
 version = "1.0.93"
@@ -595,6 +612,19 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "derive_more"
+version = "0.99.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4fb810d30a7c1953f91334de7244731fc3f3c10d7fe163338a35b9f640960321"
+dependencies = [
+ "convert_case",
+ "proc-macro2",
+ "quote",
+ "rustc_version",
+ "syn 1.0.109",
+]
+
 [[package]]
 name = "deunicode"
 version = "0.4.3"
@@ -791,6 +821,7 @@ dependencies = [
  "id",
  "infer",
  "jwt",
+ "minify-html",
  "openid",
  "refresh_tokens",
  "rocket",
@@ -1634,6 +1665,30 @@ version = "0.3.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
 
+[[package]]
+name = "minify-html"
+version = "0.10.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7754d4669873379ea6a8a5b56e406eb83de713af8a791517ef35a0c832b1e7d5"
+dependencies = [
+ "aho-corasick",
+ "css-minify",
+ "lazy_static",
+ "memchr",
+ "minify-js",
+ "rustc-hash",
+]
+
+[[package]]
+name = "minify-js"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c300f90ba1138b5c5daf5d9441dc9bdc67b808aac22cf638362a2647bc213be4"
+dependencies = [
+ "lazy_static",
+ "parse-js",
+]
+
 [[package]]
 name = "minimal-lexical"
 version = "0.2.1"
@@ -2053,6 +2108,17 @@ dependencies = [
  "windows-sys 0.45.0",
 ]
 
+[[package]]
+name = "parse-js"
+version = "0.10.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "30534759e6ad87aa144c396544747e1c25b1020bd133356fd758c8facec764e5"
+dependencies = [
+ "aho-corasick",
+ "lazy_static",
+ "memchr",
+]
+
 [[package]]
 name = "parse-zoneinfo"
 version = "0.3.0"
@@ -2661,6 +2727,15 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "08d43f7aa6b08d49f382cde6a7982047c3426db949b1424bc4b7ec9ae12c6ce2"
 
+[[package]]
+name = "rustc_version"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bfa0f585226d2e68097d4f95d113b15b83a82e819ab25717ec0590d9584ef366"
+dependencies = [
+ "semver",
+]
+
 [[package]]
 name = "rustix"
 version = "0.36.11"
@@ -2781,6 +2856,12 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "semver"
+version = "1.0.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bebd363326d05ec3e2f532ab7660680f3b02130d780c299bca73469d521bc0ed"
+
 [[package]]
 name = "serde"
 version = "1.0.158"

crates/ezidam/Cargo.toml

@@ -16,6 +16,7 @@ rocket_cors = "0.6.0-alpha2"
 email_address = { workspace = true }
 chrono-tz = "0.8.2"
 chrono-humanize = "0.2.2"
+minify-html = "0.10.8"
 
 # local crates
 database_pool = { path = "../database_pool" }

crates/ezidam/src/lib.rs

@@ -10,6 +10,7 @@ mod guards;
 mod icons;
 mod id;
 mod menu;
+mod minify;
 mod oauth;
 mod page;
 mod response_timer;
@@ -18,6 +19,7 @@ mod shutdown;
 mod tokens;
 
 pub use crate::email::init as email_init;
+use crate::minify::Minify;
 
 pub fn rocket_setup(rocket_builder: Rocket<Build>) -> Rocket<Build> {
     use cache::CacheControl;
@@ -46,6 +48,9 @@ pub fn rocket_setup(rocket_builder: Rocket<Build>) -> Rocket<Build> {
     // Static assets
     let rocket_builder = rocket_builder.mount("/", FileServer::from("static"));
 
+    // Minify content
+    let rocket_builder = Minify::rocket(rocket_builder);
+
     // Routes
     let rocket_builder = routes::routes(rocket_builder);
 

crates/ezidam/src/minify.rs

@@ -0,0 +1,49 @@
+use rocket::fairing::{self, Fairing, Kind};
+use rocket::http::ContentType;
+use rocket::{Build, Request, Response, Rocket};
+
+pub struct Minify {}
+
+impl Minify {
+    pub fn rocket(rocket_builder: Rocket<Build>) -> Rocket<Build> {
+        if cfg!(debug_assertions) {
+            rocket_builder
+        } else {
+            rocket_builder.attach(Self {})
+        }
+    }
+}
+
+#[rocket::async_trait]
+impl Fairing for Minify {
+    fn info(&self) -> fairing::Info {
+        fairing::Info {
+            name: "Minify HTML",
+            kind: Kind::Response,
+        }
+    }
+
+    async fn on_response<'r>(&self, _request: &'r Request<'_>, response: &mut Response<'r>) {
+        if response.content_type() == Some(ContentType::HTML) {
+            let body = response.body_mut();
+
+            if let Ok(original) = body.to_bytes().await {
+                let cfg = minify_html::Cfg {
+                    // Be HTML spec compliant
+                    do_not_minify_doctype: true,
+                    ensure_spec_compliant_unquoted_attribute_values: true,
+                    keep_spaces_between_attributes: true,
+
+                    // The rest
+                    keep_closing_tags: true,
+                    keep_html_and_head_opening_tags: true,
+                    minify_css: true,
+                    minify_js: true,
+                    ..Default::default()
+                };
+                let minified = minify_html::minify(&original, &cfg);
+                response.set_sized_body(minified.len(), std::io::Cursor::new(minified));
+            }
+        }
+    }
+}