Fix: non-english broken plugins (#701)

* fix epiknovel

* fix: hasutl

* fix: Novelas Ligera

* fix: ReinoWuxia

* fix: Oasis

* fix: json script

* fix: Skynovels

* fix: Yuuki Tls

* fix: Agitoon

* fix: Syosetu

* fix: IndoWebNovel

* fix: Novel Ringan

* fix: Sakura Novel

* fix: Hako

* minor: type checking when PRing

index.ts

@@ -20,6 +20,13 @@ export const getHeaders = () => {
 app.use((req, res, next) => {
     const xHeaders = req.headers["x-custom-headers"];
     if (xHeaders && typeof xHeaders === "string") {
+        for (const [headerName, headerValue] of Object.entries(pluginApi.fetchHeaders)) {
+            if (
+                typeof headerName === "string" &&
+                typeof headerValue === "string"
+            )
+                delete pluginApi.fetchHeaders[headerName];
+        }
         const headers = JSON.parse(xHeaders);
         for (const [headerName, headerValue] of Object.entries(headers)) {
             if (
@@ -80,7 +87,7 @@ app.post("/fetchImage/", async (req, res) => {
         req.body["pluginRequirePath"],
         req.body["url"]
     );
-    res.json(base64);
+    res.send(base64);
 });
 
 app.get("/", (req, res) => {