Add asynchronous directory size counting

This is enabled by default and without an option to toggle it off as it's asynchronous and shouldn't
block the server thread.

2 files changed, 56 insertions, 0 deletions

diff --git a/tests/api.rs b/tests/api.rs
new file mode 100644
index 0000000..32d6cef
--- /dev/null
+++ b/tests/api.rs
@@ -0,0 +1,53 @@
+use std::collections::HashMap;
+
+use reqwest::{StatusCode, blocking::Client};
+use rstest::rstest;
+
+mod fixtures;
+
+use crate::fixtures::{DIRECTORIES, Error, TestServer, server};
+
+#[rstest]
+fn api_dir_size(server: TestServer) -> Result<(), Error> {
+    let mut command = HashMap::new();
+    command.insert("DirSize", DIRECTORIES[0]);
+
+    let resp = Client::new()
+        .post(server.url().join(&format!("__miniserve_internal/api"))?)
+        .json(&command)
+        .send()?
+        .error_for_status()?;
+
+    assert_eq!(resp.status(), StatusCode::OK);
+    assert_ne!(resp.text()?, "0 B");
+
+    Ok(())
+}
+
+/// Test for path traversal vulnerability (CWE-22) in DirSize parameter.
+#[rstest]
+#[case("/tmp")] // Not CWE-22, but `foo` isn't a directory
+#[case("/../foo")]
+#[case("../foo")]
+#[case("../tmp")]
+#[case("/tmp")]
+#[case("/foo")]
+#[case("C:/foo")]
+#[case(r"C:\foo")]
+#[case(r"\foo")]
+fn api_dir_size_prevent_path_transversal_attacks(
+    server: TestServer,
+    #[case] path: &str,
+) -> Result<(), Error> {
+    let mut command = HashMap::new();
+    command.insert("DirSize", path);
+
+    let resp = Client::new()
+        .post(server.url().join(&format!("__miniserve_internal/api"))?)
+        .json(&command)
+        .send()?;
+
+    assert_eq!(resp.status(), StatusCode::BAD_REQUEST);
+
+    Ok(())
+}
diff --git a/tests/serve_request.rs b/tests/serve_request.rs
index d9d4880..36bdbe5 100644
--- a/tests/serve_request.rs
+++ b/tests/serve_request.rs
@@ -86,6 +86,9 @@ fn serves_requests_with_non_default_port(server: TestServer) -> Result<(), Error
 #[case("__miniserve_internal/healthcheck", server(&["--random-route"]))]
 #[case("__miniserve_internal/favicon.svg", server(&["--random-route"]))]
 #[case("__miniserve_internal/style.css", server(&["--random-route"]))]
+#[case("__miniserve_internal/healthcheck", server(&["--auth", "doesnt:matter"]))]
+#[case("__miniserve_internal/favicon.svg", server(&["--auth", "doesnt:matter"]))]
+#[case("__miniserve_internal/style.css", server(&["--auth", "doesnt:matter"]))]
 fn serves_requests_for_special_routes(
     #[case] route: &str,
     #[case] server: TestServer,