fetcher seralization

src/fetchers/standardFetch.ts

@@ -1,5 +1,6 @@
 import fetch from 'node-fetch';
 
+import { serializeBody } from '@/fetchers/body';
 import { makeFullUrl } from '@/fetchers/common';
 import { Fetcher } from '@/fetchers/types';
 
@@ -7,9 +8,15 @@ export function makeStandardFetcher(f: typeof fetch): Fetcher {
   const normalFetch: Fetcher = (url, ops) => {
     const fullUrl = makeFullUrl(url, ops);
 
+    const seralizedBody = serializeBody(ops.body);
+
     return f(fullUrl, {
       method: ops.method,
-      body: JSON.stringify(ops.body), // TODO content type headers + proper serialization
+      headers: {
+        ...seralizedBody.headers,
+        ...ops.headers,
+      },
+      body: seralizedBody.body,
     });
   };