♻ Refactor download wrapper into async func

src/cdn/downloadWithCurl.ts

@@ -9,6 +9,9 @@ export default function downloadWithCurl({ host, path, tempFileName, size, resol
 
   const parameters: string[] = [
     //...
+    '--limit-rate', '30m', //maximum speed of 30 MB/s = 240 MBit/s
+    '--speed-limit', String(100 * 1024 * 1024), //abort if less than 100 MB in 15 seconds
+    '--speed-time', '15',
     '--output', tempFileName,
     url,
   ];

src/cdn/downloadWrapper.ts

@@ -6,27 +6,29 @@ import checkLocalCache from './funcs/checkLocalCache';
 import createDirRecursively from './funcs/createDirRecursively';
 
 /** Downloads the given URL and saves it to disk. Returns the location where file is saved under. Throws error if download fails. */
-export default function downloadWrapper({ host, path, size, useCurl = false }: {host: string, path: string, size: number, useCurl: boolean}): Promise<string> {
+export default async function downloadWrapper({ host, path, size, useCurl = false }: {host: string, path: string, size: number, useCurl: boolean}): string {
-  return new Promise((resolve, reject) => {
   //Generate file name we want to save it under
   //e.g. on Linux: /tmp/patcher/patch/assets_swtor_main/assets_swtor_main_-1to0/assets_swtor_main_-1to0.zip
   const tempFileName = nodePath.join(os.tmpdir(), 'patcher', host, path);
 
   //Create parent directory recursively
   const folderName = nodePath.dirname(tempFileName);
-    createDirRecursively(folderName).then(() => {
+  await createDirRecursively(folderName);
+
   //Check if file already exists locally
-      checkLocalCache(tempFileName, size).then((cacheStatus) => {
+  const cacheStatus = await checkLocalCache(tempFileName, size);
   if (cacheStatus) {
-          return resolve(tempFileName);
+    return tempFileName;
   }
 
+  //Download either via curl or natively with Node
   if (useCurl) {
+    await new Promise((resolve, reject) => {
       downloadWithCurl({ host, path, tempFileName, size, resolve, reject });
+    });
   } else {
+    await new Promise((resolve, reject) => {
       downloadUrlContents(host, path, tempFileName, resolve, reject);
+    });
   }
-      });
-    });
-  });
 }