added file_from_bytes

crates/ezidam/src/file_from_bytes.rs

@@ -0,0 +1,29 @@
+use rocket::http::ContentType;
+use rocket::response::Responder;
+use rocket::{response, Request, Response};
+use std::io::Cursor;
+
+pub struct FileFromBytes(Vec<u8>);
+
+impl From<&[u8]> for FileFromBytes {
+    fn from(value: &[u8]) -> Self {
+        Self(value.to_vec())
+    }
+}
+
+#[rocket::async_trait]
+impl<'r> Responder<'r, 'static> for FileFromBytes {
+    fn respond_to(self, _: &'r Request<'_>) -> response::Result<'static> {
+        // Set HTTP ContentType from guessing the file extension
+        // Serve file as raw bytes if guessing fails or extension is not supported in Rocket
+        // Thanks Sergio for the code review! <3
+        let content_type = infer::get(&self.0)
+            .and_then(|mime| ContentType::from_extension(mime.extension()))
+            .unwrap_or(ContentType::Bytes);
+
+        Response::build()
+            .header(content_type)
+            .sized_body(self.0.len(), Cursor::new(self.0))
+            .ok()
+    }
+}