const { v4: uuid } = require("uuid");
var serve = require("koa-static");
const Koa = require("koa");
const Router = require("@koa/router");
const mount = require("koa-mount");
const qs = require("qs");
const { Readable } = require("stream");
const { spawn } = require("child_process");
const router = new Router();
// response
const app = new Koa();
const static = new Koa();
static.use(serve("./static"));
app.use(mount("/static", static));
function attach(docker_id, output_stream) {
// to prevent browser timeout
const interval = setInterval(() => output_stream.push(""), 500);
const task = spawn("docker", ["logs", "-f", docker_id]);
task.stdout.on("data", (d) => output_stream.push(d));
task.stdout.on("error", (d) => output_stream.push(d));
task.on("close", () => {
const check = spawn("docker", ["ps", "--filter", `id=${docker_id}`]);
let output = "";
check.on("data", (data) => (output += data));
check.on("close", () => {
console.log("CHECK", output);
clearInterval(interval);
});
check.on("error", (error) => {
console.error("error", error);
clearInterval(interval);
});
check.on("exit", (error) => {
console.error("exit", error);
clearInterval(interval);
});
});
}
router.get("/", async (ctx) => {
const s = new Readable({ read() {} });
// stream data
ctx.response.set("content-type", "txt/html");
ctx.type = "html"; // <-- THIS is the important step!
ctx.body = s;
ctx.body.push("");
const params = qs.parse(ctx.querystring);
s.push(`Got request to screenshot ${params.url}`);
const id = uuid();
let docker_id = "";
if (!params.url) {
ctx.body = "specify url!";
return;
}
const starter = spawn(
"docker",
[
"run",
"-i",
"-d",
"-v",
`${process.cwd()}/static:/opt/static`,
"headless-fox",
"./script3.sh",
`{"url": "${params.url}", "third_party_domains": ["hotjar.com", "cookielaw.org", "facebook.com"]}`,
id,
],
{ cwd: process.cwd() }
);
starter.stdout.on("data", (data) => {
docker_id += data.toString().replace(/\n/g, "");
});
starter.on("close", () => {
ctx.body.push("spawned " + docker_id);
attach(docker_id, ctx.body);
});
});
app.use(router.routes()).use(router.allowedMethods());
app.listen(3000);