Mobile app PoC (#281)

Initial checkin of mobile "native" app

plug-api/plugos-syscall/fetch.ts

@@ -0,0 +1,42 @@
+import { base64Decode } from "../../plugos/asset_bundle/base64.ts";
+
+export type SandboxFetchRequest = {
+  method?: string;
+  headers?: Record<string, string>;
+};
+
+export type SandboxFetchResponse = {
+  ok: boolean;
+  status: number;
+  headers: Record<string, string>;
+  // We base64 encode the body because the body can be binary data that we have to push through the worker boundary
+  base64Body: string;
+};
+
+export function sandboxFetch(
+  url: string,
+  options?: SandboxFetchRequest,
+): Promise<SandboxFetchResponse> {
+  // @ts-ignore: monkey patching fetch
+  return syscall("sandboxFetch.fetch", url, options);
+}
+
+export function monkeyPatchFetch() {
+  // @ts-ignore: monkey patching fetch
+  globalThis.fetch = async function (
+    url: string,
+    init?: RequestInit,
+  ): Promise<Response> {
+    const r = await sandboxFetch(
+      url,
+      init && {
+        method: init.method,
+        headers: init.headers as Record<string, string>,
+      },
+    );
+    return new Response(base64Decode(r.base64Body), {
+      status: r.status,
+      headers: r.headers,
+    });
+  };
+}