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silverbullet/plug-api/plugos-syscall/fetch.ts
2023-01-08 22:38:54 +01:00

45 lines
1.1 KiB
TypeScript

import { base64Decode } from "../../plugos/asset_bundle/base64.ts";
export type SandboxFetchRequest = {
method?: string;
headers?: Record<string, string>;
body?: 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>,
body: init.body as string,
},
);
return new Response(r.base64Body ? base64Decode(r.base64Body) : null, {
status: r.status,
headers: r.headers,
});
};
}