Set `charset` params on returned content types.

This is a somewhat indirect change; it removes `mime_guess` in favour of some very, uh, "bespoke" mime detection logic that hardcodes mime types for the small repertoire of file extensions actually present in the UI. `mime_guess` doesn't provide a way to set params as it exports its own `Mime` struct, which doesn't provide `with_params()`.

1 files changed, 22 insertions, 0 deletions

diff --git a/src/ui/mime.rs b/src/ui/mime.rs
new file mode 100644
index 0000000..9c724f0
--- /dev/null
+++ b/src/ui/mime.rs
@@ -0,0 +1,22 @@
+use mime::Mime;
+use unix_path::Path;
+
+// Extremely manual; using `std::path` here would result in platform-dependent behaviour when it's not appropriate (the URLs passed here always use `/` and are parsed like URLs). Using `unix_path` might be an option, but it's not clearly
+pub fn from_path<P>(path: P) -> Result<Mime, mime::FromStrError>
+where
+    P: AsRef<Path>,
+{
+    let path = path.as_ref();
+    let extension = path.extension().and_then(|ext| ext.to_str());
+    let mime = match extension {
+        Some("css") => "text/css; charset=utf-8",
+        Some("js") => "text/javascript; charset=utf-8",
+        Some("json") => "application/json",
+        Some("html") => "text/html; charset=utf-8",
+        Some("png") => "image/png",
+        _ => "application/octet-stream",
+    };
+    let mime = mime.parse()?;
+
+    Ok(mime)
+}