Fix tsp init hanging when done due to unclosed connection

.chronus/changes/fix-init-never-ending-2024-3-17-20-24-14.md

@@ -0,0 +1,8 @@
+---
+# Change versionKind to one of: internal, fix, dependencies, feature, deprecation, breaking
+changeKind: fix
+packages:
+  - "@typespec/compiler"
+---
+
+Fix tsp init hanging when done due to unclosed connection

packages/compiler/package.json

@@ -85,6 +85,7 @@
     "@babel/code-frame": "~7.24.2",
     "ajv": "~8.12.0",
     "change-case": "~5.4.4",
+    "follow-redirects": "^1.15.6",
     "globby": "~14.0.1",
     "mustache": "~4.2.0",
     "picocolors": "~1.0.0",
@@ -98,6 +99,7 @@
   },
   "devDependencies": {
     "@types/babel__code-frame": "~7.0.6",
+    "@types/follow-redirects": "^1.14.4",
     "@types/mustache": "~4.2.5",
     "@types/node": "~18.11.19",
     "@types/prompts": "~2.4.9",

packages/compiler/src/core/fetch.ts

@@ -1,5 +1,4 @@
-import http from "http";
-import https from "https";
+import followRedirects from "follow-redirects";
 import { compilerAssert } from "./diagnostics.js";
 
 export interface FetchResponse {
@@ -19,14 +18,15 @@ export function fetch(uri: string): Promise<FetchResponse> {
   function request(uri: string, resolve: (arg: FetchResponse) => void, reject: (arg: any) => void) {
     const url = new URL(uri);
     const protocol =
-      url.protocol === "https:" ? https : url.protocol === "http:" ? http : undefined;
+      url.protocol === "https:"
+        ? followRedirects.https
+        : url.protocol === "http:"
+          ? followRedirects.http
+          : undefined;
     compilerAssert(protocol, `Protocol '${url.protocol}' is not supported`);
 
     protocol
       .get(url, (res) => {
-        if ((res.statusCode === 301 || res.statusCode === 302) && res.headers.location) {
-          return request(res.headers.location, resolve, reject);
-        }
         let data = "";
 
         res.on("data", (chunk) => {