💡 Update comments for release path search

src/cdn/getUrlContents.ts

@@ -0,0 +1,35 @@
+import * as http from 'http';
+
+export default function getUrlContents({ host, path }: {host: string, path: string}): Promise<ArrayBuffer> {
+  return new Promise((resolve, reject) => {
+    const request = http.request({
+      family: 4,
+      host,
+      path,
+    }, (response) => {
+      if (response.statusCode !== 200) {
+        return reject(`Expected status code 200 but received ${response.statusCode}`);
+      }
+      const headerLength = Number(response.headers['content-length']);
+
+      const chunkList: Buffer[] = [];
+      let totalLength = 0;
+      response.on('data', (chunk: Buffer) => {
+        chunkList.push(chunk);
+        totalLength += chunk.length;
+      });
+      response.on('end', () => {
+        if (totalLength !== headerLength) {
+          return reject(`Expected length ${headerLength} but received ${totalLength}`);
+        }
+        const fileContents = Buffer.concat(chunkList, totalLength);
+        resolve(fileContents.buffer as ArrayBuffer);
+      });
+    });
+
+    request.on('error', (e) => {
+      reject(e);
+    });
+    request.end();
+  });
+}