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fix(security): harden local fetch surfaces

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Valerio 2026-05-12 12:00:25 +02:00
parent af96628dc9
commit a611ae26f3
5 changed files with 94 additions and 15 deletions
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29
crates/webclaw-core/src/js_eval.rs
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@ -9,10 +9,12 @@ use once_cell::sync::Lazy;
use regex::Regex;
use rquickjs::{Context, Runtime};
use scraper::{Html, Selector};
use std::time::{Duration, Instant};
use tracing::debug;
static SCRIPT_SELECTOR: Lazy<Selector> = Lazy::new(|| Selector::parse("script").unwrap());
static HTML_TAG_RE: Lazy<Regex> = Lazy::new(|| Regex::new(r"<[^>]+>").unwrap());
const JS_EVAL_TIMEOUT: Duration = Duration::from_millis(250);
/// A blob of data extracted from JS execution.
pub struct JsDataBlob {
@ -49,6 +51,8 @@ pub fn extract_js_data(html: &str) -> Vec<JsDataBlob> {
let rt = Runtime::new().expect("QuickJS runtime creation failed");
rt.set_memory_limit(64 * 1024 * 1024); // 64 MB
rt.set_max_stack_size(1024 * 1024); // 1 MB
let deadline = Instant::now() + JS_EVAL_TIMEOUT;
rt.set_interrupt_handler(Some(Box::new(move || Instant::now() >= deadline)));
let ctx = Context::full(&rt).expect("QuickJS context creation failed");
@ -464,6 +468,8 @@ fn walk_rsc_tree(value: &serde_json::Value, out: &mut Vec<String>, depth: usize)
#[cfg(test)]
mod tests {
use std::time::{Duration, Instant};
use super::*;
#[test]
@ -493,6 +499,29 @@ mod tests {
);
}
#[test]
fn js_eval_interrupts_infinite_loops() {
let html = r#"
<html>
<head>
<script>
while (true) {}
</script>
</head>
<body>hello</body>
</html>
"#;
let start = Instant::now();
let blobs = extract_js_data(html);
assert!(blobs.is_empty());
assert!(
start.elapsed() < Duration::from_secs(2),
"QuickJS execution should be interrupted quickly"
);
}
#[test]
fn skips_external_and_module_scripts() {
let html = r#"<html><body>