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import got from "got";
import vm from "vm";
import { DEFAULT_HEADERS } from "../constant.js";
import { generateHash } from "./util.js";
import { SavefromArgsSchema, SavefromSchema } from "../types/savefrom-v1.js";
export async function savefrom(url) {
SavefromArgsSchema.parse(arguments);
const form = {
sf_url: url,
sf_submit: "",
new: "2",
lang: "en",
app: "",
country: "en",
os: "Windows",
browser: "Chrome",
channel: "main",
"sf-nomad": "1",
url,
ts: Date.now(),
_ts: 1720433117117,
_tsc: 0,
_s: generateHash(url),
_x: 1,
};
const data = await got
.post("https://worker.savefrom.net/savefrom.php", {
headers: {
...DEFAULT_HEADERS,
"content-type": "application/x-www-form-urlencoded",
origin: "https://en.savefrom.net",
referer: "https://en.savefrom.net/",
},
form,
})
.text();
const context = {
results: null,
parent: { document: { location: {} } },
frameElement: {},
atob: (base64) => Buffer.from(base64, "base64").toString(),
_decodeURIComponent: (uri) => {
const decoded = decodeURIComponent(uri);
if (/showResult/.test(decoded)) {
context.results = decoded;
return "true";
}
return decoded;
},
};
vm.createContext(context);
new vm.Script(`decodeURIComponent=_decodeURIComponent;${data}`).runInContext(context);
const executed =
context.results?.split("window.parent.sf.videoResult.show(")?.[1] ||
context.results?.split("window.parent.sf.videoResult.showRows(")?.[1];
if (!executed) {
throw new Error("Cannot find result from evaluation!");
}
let json = null;
try {
if (context.results?.includes("showRows")) {
const splits = executed.split('],"');
const lastIndex = splits.findIndex((v) => v.includes("window.parent.sf.enableElement"));
json = JSON.parse(splits.slice(0, lastIndex).join('],"') + "]");
} else {
json = [JSON.parse(executed.split(");")[0])];
}
} catch (e) {
throw new Error("Cannot parse JSON results data from evaluation!");
}
return SavefromSchema.parse(json);
}
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