add sendgb downloader like a boss

src/sendgb.js

@@ -0,0 +1,103 @@
+import fs from "fs";
+
+const C = {
+  info: msg => console.log("\x1b[36m[i]\x1b[0m " + msg),
+  ok: msg => console.log("\x1b[32m[✓]\x1b[0m " + msg),
+  warn: msg => console.log("\x1b[33m[!]\x1b[0m " + msg),
+  err: msg => console.log("\x1b[31m[✗]\x1b[0m " + msg),
+};
+
+const base = "https://sendgb.com/";
+const url = process.argv[2];
+
+if (!url || !url.startsWith(base)) {
+  C.err("Usage: node sendgb.js <sendgb-url>");
+  process.exit(1);
+}
+
+C.info(`Fetching page: ${url}`);
+
+const page = await fetch(url);
+const html = await page.text();
+
+const sendgb_session = page.headers
+  .getSetCookie()
+  .find(c => c.startsWith("sendgb_ses="))
+  ?.split(";")[0]
+  .split("=")
+  .at(-1);
+
+if (!sendgb_session) {
+  C.err("Failed to extract sendgb session cookie");
+  process.exit(1);
+}
+
+const get = (re) => [...html.matchAll(re)][0]?.[1];
+
+const link = get(/<form id="downloadItems" action="([^"]*)"/gm);
+const secret = get(/name="secret_code"[^>]*value="([^"]*)"/gm);
+const total_files = get(/name="total_files"[^>]*value="(\d+)"/gm);
+
+if (!link || !secret || !total_files) {
+  C.err("Failed to parse download form");
+  process.exit(1);
+}
+
+C.info(`Files: ${total_files}`);
+C.info("Requesting ZIP…");
+
+const res = await fetch(link, {
+  method: "POST",
+  body: new URLSearchParams({
+    action: "download",
+    secret_code: secret,
+    private_id: "",
+    download_id: url.replace(base, ""),
+    total_files
+  }),
+  headers: {
+    "User-Agent": "Mozilla/5.0"
+  }
+});
+
+if (!res.ok || !res.body) {
+  C.err(`Download failed (${res.status})`);
+  process.exit(1);
+}
+
+C.info("Content-type: " + res.headers.get("content-type"))
+const filename =
+  res.headers.get("content-disposition")?.match(/filename="?([^"]+)"?/)?.[1]
+  ?? "download.zip";
+
+C.info(`Downloading ${filename}`);
+
+const file = fs.createWriteStream(filename);
+const reader = res.body.getReader();
+
+let downloaded = 0;
+const total = Number(res.headers.get("content-length")) || 0;
+const start = Date.now();
+
+while (true) {
+  const { done, value } = await reader.read();
+  if (done) break;
+
+  file.write(value);
+  downloaded += value.length;
+
+  if (total) {
+    const pct = ((downloaded / total) * 100).toFixed(1);
+    const mb = (downloaded / 1024 / 1024).toFixed(2);
+    const tmb = (total / 1024 / 1024).toFixed(2);
+    process.stdout.write(`\r${pct}%  ${mb}/${tmb} MB`);
+  } else {
+    const mb = (downloaded / 1024 / 1024).toFixed(2);
+    process.stdout.write(`\r${mb} MB`);
+  }
+}
+
+file.end();
+
+process.stdout.write("\n");
+C.ok(`Saved as ${filename} in ${((Date.now() - start) / 1000).toFixed(1)}s`);