From f4b3588ae1669617d7562894a9004536d25ee67e Mon Sep 17 00:00:00 2001
From: Joscha <joscha@plugh.de>
Date: Mon, 2 Dec 2024 20:46:14 +0100
Subject: [PATCH] Switch from axum to axum-core and http

This will hopefully keep dependency churn lower.
---
 .vscode/settings.json |  3 +++
 Cargo.toml            |  6 +++++-
 src/axum.rs           | 23 +++++++++++++++++------
 3 files changed, 25 insertions(+), 7 deletions(-)
 create mode 100644 .vscode/settings.json

diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..6f5c4ed
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+  "rust-analyzer.cargo.features": "all"
+}
diff --git a/Cargo.toml b/Cargo.toml
index 0e9c8d6..17b46e6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,8 +9,12 @@ license = "MIT OR Apache-2.0"
 keywords = ["html", "svg", "mathml", "hiccup"]
 categories = ["web-programming", "template-engine"]
 
+[features]
+axum = ["dep:axum-core", "dep:http"]
+
 [dependencies]
-axum = { version = "0.7.9", optional = true }
+axum-core = { version = "0.4.5", optional = true }
+http = { version = "1.1.0", optional = true }
 
 [lints]
 rust.unsafe_code = { level = "forbid", priority = 1 }
diff --git a/src/axum.rs b/src/axum.rs
index 0387ba6..44059bb 100644
--- a/src/axum.rs
+++ b/src/axum.rs
@@ -1,14 +1,25 @@
-use axum::{
-    http::StatusCode,
-    response::{Html, IntoResponse},
-};
+use axum_core::response::IntoResponse;
+use http::{header, HeaderValue, StatusCode};
 
 use crate::{Document, Render};
 
+// https://github.com/hyperium/mime/blob/ce5062d216bf757a0ed3fc70f0fe255d1c8d74ae/src/lib.rs#L753
+const TEXT_HTML_UTF_8: &str = "text/html; charset=utf-8";
+
 impl IntoResponse for Document {
-    fn into_response(self) -> axum::response::Response {
+    fn into_response(self) -> axum_core::response::Response {
         match self.render_to_string() {
-            Ok(html) => Html(html).into_response(),
+            // Keeping dependency churn low by manually reimplementing
+            // https://github.com/tokio-rs/axum/blob/b5a01092216d0fa5ab950cbd7030ebcc925ceb33/axum/src/response/mod.rs#L40-L54
+            Ok(html) => (
+                [(
+                    header::CONTENT_TYPE,
+                    HeaderValue::from_static(TEXT_HTML_UTF_8),
+                )],
+                html,
+            )
+                .into_response(),
+
             Err(err) => (StatusCode::INTERNAL_SERVER_ERROR, err.to_string()).into_response(),
         }
     }