Split out json printing code

src/main/main.zig

@@ -27,33 +27,32 @@ const json_options = if (builtin.mode == .Debug)
     },
 };
 
-fn getNote(srv: *RequestServer, ctx: *http.server.Context, _: RouteArgs) !void {
-    const alloc = srv.alloc;
-    const headers = http.Headers.init(alloc);
+// Responds to a request with a json value
+fn respondJson(ctx: *http.server.Context, value: anytype, alloc: std.mem.Allocator) !void {
+    var headers = http.Headers.init(alloc);
+    defer headers.deinit();
 
-    const note = try db.getNote(alloc);
-    defer db.free(alloc, note);
+    // Don't need to free this k/v pair because they aren't dynamically allocated
+    try headers.put("Content-Type", "application/json");
 
     var stream = try ctx.openResponse(&headers, .ok);
     defer stream.close();
 
     const writer = stream.writer();
-    try std.json.stringify(note, json_options, writer);
+    try std.json.stringify(value, json_options, writer);
 
     try stream.finish();
 }
 
+fn getNote(srv: *RequestServer, ctx: *http.server.Context, _: RouteArgs) !void {
+    const note = try db.getNote(srv.alloc);
+    defer db.free(srv.alloc, note);
+
+    try respondJson(ctx, note, srv.alloc);
+}
+
 fn healthcheck(srv: *RequestServer, ctx: *http.server.Context, _: RouteArgs) !void {
-    const alloc = srv.alloc;
-    const headers = http.Headers.init(alloc);
-
-    var stream = try ctx.openResponse(&headers, .ok);
-    defer stream.close();
-
-    const writer = stream.writer();
-    try std.json.stringify(.{ .status = "ok" }, json_options, writer);
-
-    try stream.finish();
+    try respondJson(ctx, .{ .status = "ok" }, srv.alloc);
 }
 
 const RequestServer = struct {