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silverbullet/common/proxy_fetch.ts
2023-08-23 19:08:21 +02:00

38 lines
959 B
TypeScript

import { base64Decode, base64Encode } from "../plugos/asset_bundle/base64.ts";
export type ProxyFetchRequest = {
method?: string;
headers?: Record<string, string>;
base64Body?: string;
};
export type ProxyFetchResponse = {
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 async function performLocalFetch(
url: string,
req: ProxyFetchRequest,
): Promise<ProxyFetchResponse> {
const result = await fetch(
url,
req && {
method: req.method,
headers: req.headers,
body: req.base64Body && base64Decode(req.base64Body),
},
);
return {
ok: result.ok,
status: result.status,
headers: Object.fromEntries(result.headers.entries()),
base64Body: base64Encode(
new Uint8Array(await (await result.blob()).arrayBuffer()),
),
};
}