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silverbullet/plugos/syscalls/fetch.ts

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import type {
SandboxFetchRequest,
SandboxFetchResponse,
} from "../../plug-api/plugos-syscall/fetch.ts";
import { base64Encode } from "../asset_bundle/base64.ts";
import { SysCallMapping } from "../system.ts";
export async function sandboxFetch(
url: string,
req?: SandboxFetchRequest,
): Promise<SandboxFetchResponse> {
const result = await fetch(
url,
req && {
method: req.method,
headers: req.headers,
},
);
const body = await (await result.blob()).arrayBuffer();
return {
ok: result.ok,
status: result.status,
headers: Object.fromEntries(result.headers.entries()),
base64Body: base64Encode(new Uint8Array(body)),
};
}
export function sandboxFetchSyscalls(): SysCallMapping {
return {
"sandboxFetch.fetch": (
_ctx,
url: string,
options?: SandboxFetchRequest,
): Promise<SandboxFetchResponse> => {
return sandboxFetch(url, options);
},
};
}