fix: 🐛 Add Content Type Header

Adds Content Type header application/json on non GET requests

README.md

@@ -48,7 +48,7 @@ Have a look at the [Twitch API Reference](https://dev.twitch.tv/docs/api/referen
 
 If the Endpoint is for example `PATCH https://api.twitch.tv/helix/channels`, send a PATCH Request to `http://localhost:6776/helix/channels` and the necessary Headers for Authorization will be added to your Request automatically.
 
-Do not add any extra headers (eg. `Authorization` or `Client-Id`).
+Do not add any extra headers (eg. `Authorization` or `Client-Id`). All headers sent with your request will be removed. All Methods other than `GET` will automatically get the `Content-Type: application/json` header.
 
 ## Reset twitch-api
 

src/authGate.ts

@@ -23,12 +23,16 @@ export const withAuthGate = async (request: Request) => {
   url.hostname = "api.twitch.tv";
   url.port = "443";
 
+  const body = request.body;
+  const method = request.method;
+
   const headers = new Headers();
   headers.set('Client-Id', clientId);
   headers.set('Authorization', `Bearer ${accessToken}`);
 
-  const body = request.body;
-  const method = request.method;
+  if (method.toLowerCase() !== 'get') {
+    headers.set('Content-Type', 'application/json');
+  }
 
   const initialResponse = await fetch(url.toString(), {
     headers,