chore: Initial commit

Based on the version that was previously in `vhack.eu/nixos-server/pkgs/by-name/ba/back`.

1 files changed, 61 insertions, 0 deletions

diff --git a/src/web/responses.rs b/src/web/responses.rs
new file mode 100644
index 0000000..bcdcc0a
--- /dev/null
+++ b/src/web/responses.rs
@@ -0,0 +1,61 @@
+// Back - An extremely simple git bug visualization system. Inspired by TVL's
+// panettone.
+//
+// Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This file is part of Back.
+//
+// You should have received a copy of the License along with this program.
+// If not, see <https://www.gnu.org/licenses/agpl.txt>.
+
+use std::convert::Infallible;
+
+use bytes::Bytes;
+use http::{Response, StatusCode, Version};
+use http_body_util::{BodyExt, Full, combinators::BoxBody};
+
+use crate::{error, git_bug::format::HtmlString};
+
+pub(super) fn html_response<T: Into<Bytes>>(html_text: T) -> Response<BoxBody<Bytes, Infallible>> {
+    html_response_status(html_text, StatusCode::OK)
+}
+
+pub(super) fn html_response_status<T: Into<Bytes>>(
+    html_text: T,
+    status: StatusCode,
+) -> Response<BoxBody<Bytes, Infallible>> {
+    html_response_status_content_type(html_text, status, "text/html")
+}
+
+pub(super) fn html_response_status_content_type<T: Into<Bytes>>(
+    html_text: T,
+    status: StatusCode,
+    content_type: &str,
+) -> Response<BoxBody<Bytes, Infallible>> {
+    Response::builder()
+        .status(status)
+        .version(Version::HTTP_2)
+        .header("Content-Type", format!("{}; charset=utf-8", content_type))
+        .header("x-content-type-options", "nosniff")
+        .header("x-frame-options", "SAMEORIGIN")
+        .body(full(html_text))
+        .expect("This will always build")
+}
+
+fn full<T: Into<Bytes>>(chunk: T) -> BoxBody<Bytes, Infallible> {
+    Full::new(chunk.into()).boxed()
+}
+
+// FIXME: Not all errors should return `INTERNAL_SERVER_ERROR`. <2025-03-08>
+impl error::Error {
+    pub fn into_response(self) -> Response<BoxBody<Bytes, Infallible>> {
+        html_response_status(
+            format!(
+                "<h1> Internal server error. </h1> <pre>Error: {}</pre>",
+                HtmlString::from(self.to_string())
+            ),
+            StatusCode::INTERNAL_SERVER_ERROR,
+        )
+    }
+}