feat(core): add charset parameter to HTML response header

Author: DASPRiD

packages/core/src/http/common.ts

@@ -53,9 +53,11 @@ export const jsonResponse = (value: JsonSerializable): ToHttpResponse => ({
 /**
  * An HTML response with the content-type header set to text/html.
  */
-export const htmlResponse = (html: string): ToHttpResponse => ({
+export const htmlResponse = (html: string, charset = "utf-8"): ToHttpResponse => ({
     [TO_HTTP_RESPONSE]: (): HttpResponse => {
-        return HttpResponse.builder().header("content-type", "text/html").body(html);
+        return HttpResponse.builder()
+            .header("content-type", `text/html; charset=${charset}`)
+            .body(html);
     },
 });
 

packages/core/test/http/common.test.ts

@@ -37,7 +37,7 @@ describe("http:common", () => {
             const html = "<h1>Hello</h1>";
             const res = htmlResponse(html)[TO_HTTP_RESPONSE]();
             assert.equal(res.status.code, 200);
-            assert.equal(res.headers.get("content-type")?.value, "text/html");
+            assert.equal(res.headers.get("content-type")?.value, "text/html; charset=utf-8");
 
             const body = await consumers.text(res.body.readable);
             assert.equal(body, html);