Extract authn & authz utils

Signed-off-by: Émile Ré <emile@getprobo.com>

pkg/server/gqlutils/httpctx.go

@@ -0,0 +1,55 @@
+// Copyright (c) 2025 Probo Inc <hello@getprobo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+package gqlutils
+
+import (
+	"context"
+	"net/http"
+)
+
+type (
+	ctxKey struct{ name string }
+)
+
+var (
+	httpResponseWriterKey = &ctxKey{name: "http_response_writer"}
+	httpRequestKey        = &ctxKey{name: "http_request"}
+)
+
+func HTTPContextMiddleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(
+		func(w http.ResponseWriter, r *http.Request) {
+			ctx := WithHTTPContext(r.Context(), w, r)
+
+			next.ServeHTTP(w, r.WithContext(ctx))
+		},
+	)
+}
+
+func WithHTTPContext(ctx context.Context, w http.ResponseWriter, r *http.Request) context.Context {
+
+	ctx = context.WithValue(ctx, httpResponseWriterKey, w)
+	ctx = context.WithValue(ctx, httpRequestKey, r)
+
+	return ctx
+}
+
+func HTTPResponseWriterFromContext(ctx context.Context) http.ResponseWriter {
+	return ctx.Value(httpResponseWriterKey).(http.ResponseWriter)
+}
+
+func HTTPRequestFromContext(ctx context.Context) *http.Request {
+	return ctx.Value(httpRequestKey).(*http.Request)
+}