Fixes https://discord.com/channels/876711213126520882/1131175053409656833/1131175053409656833

@tr1ckydev this fixes the issue you ran into, see the diff for an example usage of a Bun.plugin that makes a network request on import.

src/bun.js/module_loader.zig

@@ -1525,12 +1525,14 @@ pub const ModuleLoader = struct {
         var slice = slice_;
         if (slice.len == 0) return slice;
         var was_http = false;
-        if (strings.hasPrefixComptime(slice, "https://")) {
-            slice = slice["https://".len..];
-            was_http = true;
-        } else if (strings.hasPrefixComptime(slice, "http://")) {
-            slice = slice["http://".len..];
-            was_http = true;
+        if (jsc_vm.bundler.options.serve) {
+            if (strings.hasPrefixComptime(slice, "https://")) {
+                slice = slice["https://".len..];
+                was_http = true;
+            } else if (strings.hasPrefixComptime(slice, "http://")) {
+                slice = slice["http://".len..];
+                was_http = true;
+            }
         }
 
         if (strings.hasPrefix(slice, jsc_vm.origin.host)) {

test/js/bun/plugin/plugins.test.ts

@@ -13,6 +13,26 @@ declare global {
   var asyncret: any;
 }
 
+plugin({
+  name: "url text file loader",
+  setup(builder) {
+    builder.onResolve({ namespace: "http", filter: /.*/ }, ({ path }) => {
+      return {
+        path,
+        namespace: "url",
+      };
+    });
+
+    builder.onLoad({ filter: /.*/, namespace: "url" }, async ({ path, namespace }) => {
+      const res = await fetch("http://" + path);
+      return {
+        exports: { default: await res.text() },
+        loader: "object",
+      };
+    });
+  },
+});
+
 plugin({
   name: "boop beep beep",
   setup(builder) {
@@ -313,4 +333,37 @@ describe("errors", () => {
       throw -1;
     }).toThrow('Cannot find package "');
   });
+
+  it("can work with http urls", async () => {
+    const result = `The Mysterious Affair at Styles
+    The Secret Adversary
+    The Murder on the Links
+    The Man in the Brown Suit
+    The Secret of Chimneys
+    The Murder of Roger Ackroyd
+    The Big Four
+    The Mystery of the Blue Train
+    The Seven Dials Mystery
+    The Murder at the Vicarage
+    Giant's Bread
+    The Floating Admiral
+    The Sittaford Mystery
+    Peril at End House
+    Lord Edgware Dies
+    Murder on the Orient Express
+    Unfinished Portrait
+    Why Didn't They Ask Evans?
+    Three Act Tragedy
+    Death in the Clouds`;
+
+    const server = Bun.serve({
+      port: 0,
+      fetch(req, server) {
+        server.stop();
+        return new Response(result);
+      },
+    });
+    const { default: text } = await import(`http://${server.hostname}:${server.port}/hey.txt`);
+    expect(text).toBe(result);
+  });
 });