eoka 0.5.15

Stealth browser automation for Rust. Puppeteer/Playwright alternative with anti-bot bypass.
Documentation

eoka

crates.io docs.rs CI

Stealth browser automation in Rust. Passes bot detection without the bloat.

Requirements

Chrome or Chromium installed. eoka launches and controls it via CDP.

Install

[dependencies]
eoka = "0.5"
tokio = { version = "1", features = ["rt-multi-thread", "macros"] }

Quick Start

use eoka::{Browser, Result};

#[tokio::main]
async fn main() -> Result<()> {
    let browser = Browser::launch().await?;
    let page = browser.new_page("https://example.com").await?;

    page.human_click("#button").await?;
    page.human_type("#input", "hello").await?;

    let png = page.screenshot().await?;
    std::fs::write("screenshot.png", png)?;

    browser.close().await?;
    Ok(())
}

Login Flow Example

use eoka::{Browser, Result};

#[tokio::main]
async fn main() -> Result<()> {
    let browser = Browser::launch().await?;
    let page = browser.new_page("https://example.com/login").await?;

    page.try_click_by_text("Accept Cookies").await?;
    page.human_click_by_text("Sign In").await?;
    page.wait_for_visible("#email", 10_000).await?;
    page.human_fill("#email", "user@example.com").await?;
    page.human_fill("#password", "secret123").await?;
    page.human_click_by_text("Log In").await?;
    page.wait_for_text("Welcome back", 15_000).await?;

    browser.close().await?;
    Ok(())
}

API

Browser

let browser = Browser::launch().await?;
let browser = Browser::launch_visible().await?;
let browser = Browser::launch_debug().await?;
let browser = Browser::launch_with(|config| {
    config.proxy = Some("http://127.0.0.1:8080".into());
}).await?;
let browser = Browser::launch_with_config(config).await?;
let page = browser.new_page("https://example.com").await?;
let tabs = browser.tabs().await?;
browser.activate_tab(id).await?;
browser.close_tab(id).await?;
browser.close().await?;

Finding Elements

page.find("#button").await?;                    // CSS selector
page.find_all(".item").await?;                  // all matches
page.find_by_text("Sign In").await?;            // by visible text
page.find_any(&["#email", "[name='email']"]).await?; // first match
page.exists("#popup").await;                    // bool
page.text_exists("Error").await;                // bool

Clicking

page.click("#button").await?;                   // instant
page.human_click("#button").await?;             // with mouse movement
page.click_by_text("Submit").await?;
page.human_click_by_text("Submit").await?;
page.try_click("#optional").await?;             // Ok(false) if missing
page.try_click_by_text("Accept").await?;

// Native held pointer input for drags. Call release_all_inputs before close
// if an operation is interrupted.
page.mouse_move(100.0, 100.0).await?;
page.mouse_down(100.0, 100.0, eoka::MouseButton::Left).await?;
page.mouse_move(300.0, 100.0).await?;
page.mouse_up(300.0, 100.0, eoka::MouseButton::Left).await?;

Typing

page.fill("#email", "user@example.com").await?;     // clear + type + verify
page.fill("#volume", "50").await?;                    // range: validates, sets, input/change
page.human_fill("#email", "user@example.com").await?; // human-like
page.type_into("#search", "query").await?;           // append (no clear)
page.human_type("#search", "query").await?;

Waiting

page.wait_for("#results", 10_000).await?;           // in DOM
page.wait_for_visible("#email", 10_000).await?;     // visible + clickable
page.wait_for_hidden(".loading", 5_000).await?;
page.wait_for_any(&["#ok", ".error"], 10_000).await?;
page.wait_for_text("Success", 10_000).await?;
page.wait_for_url_contains("dashboard", 10_000).await?;
page.wait_for_url_change(10_000).await?;
page.wait_for_network_idle(500, 30_000).await?;     // XHR/fetch idle

Elements

let elem = page.find("#btn").await?;
elem.click().await?;
elem.is_visible().await?;           // Result<bool>
elem.bounding_box().await;          // Option<BoundingBox>
elem.get_attribute("href").await?;  // Option<String>
elem.tag_name().await?;
elem.value().await?;
elem.text().await?;
elem.is_enabled().await?;
elem.is_checked().await?;
elem.css("color").await?;
elem.scroll_into_view().await?;

Keyboard, Hover, Select, Upload

Printable press_key / key_down events carry native text: "o" inserts o, "O" inserts O, and "Shift+o" inserts O. Shift uses US-keyboard ASCII mappings; single Unicode characters are literal. Ctrl/Alt/Meta shortcuts, key-up and input cleanup do not insert text. Browser focus, read-only fields and page preventDefault() handlers still determine whether an edit occurs. For whole strings or composed text, use type_text.

page.press_key("Enter").await?;
page.press_key("Ctrl+A").await?;
page.key_down("Shift").await?; // held across calls, with browser-native CDP input
page.key_down("ArrowRight").await?;
page.key_up("ArrowRight").await?;
page.key_up("Shift").await?;
page.release_all_inputs().await?; // cleanup interrupted held input
page.select_all().await?;
page.copy().await?;
page.paste().await?;

page.hover("#menu").await?;
page.human_hover("#menu").await?;

page.select("#country", "US").await?;
page.select_by_text("#country", "United States").await?;

page.upload_file("input[type='file']", "/path/to/file.pdf").await?;
page.upload_files("input[type='file']", &["/a.pdf", "/b.pdf"]).await?;

JavaScript & Frames

let count: i32 = page.evaluate("document.querySelectorAll('li').length").await?;
page.execute("window.scrollTo(0, 1000)").await?;
let title: String = page.evaluate_in_frame("iframe#widget", "document.title").await?;

for frame in page.frames().await? {
    let title: String = page.evaluate_in_frame_id(&frame.id, "document.title").await?;
    let ancestors = page.frame_ancestor_ids(&frame.id).await?;
}

frames() includes nested out-of-process iframes belonging to this page. Both evaluation methods use CDP isolated worlds without enabling Runtime; they can access cross-origin frame DOM, but not page-owned JavaScript globals. evaluate_in_frame requires a CSS selector matching exactly one frame element in the top document; use IDs for nested frames. Bare URLs and numeric indices are not selectors. Ancestors are ordered from the immediate parent to the root, excluding the queried frame. These are snapshot APIs, not stable navigation identities; reacquire IDs after navigation. Explicit JavaScript null decodes as JSON null (or None); undefined still errors.

page.frame_element_content_quad(frame_id, selector, index) returns eight coordinates in content-corner order, preserving reflections through open and closed shadow-slot ancestry. Coordinates are relative to the owning CDP session's viewport, not necessarily the root page or local iframe. Selectors are limited to 4096 bytes and 64 matches; the index must be below 64. Missing, detached, fragmented and degenerate boxes fail. This is geometry, not a visibility/hit-test guarantee. Temporary remote objects are released on success; errors/cancellation schedule bounded best-effort cleanup.

page.frame_point_to_viewport(frame_id, x, y) maps frame-local CSS points to the root viewport through nested/OOPIF borders, padding, scrolling and positive scaling. Hidden, reflected, rotated or out-of-viewport geometry is rejected, including closed shadow slots. Wait for rendering after layout changes; this is not a hit test.

For input, page.frame_point_for_input(frame_id, x, y) also requires each parent document to hit the owning iframe at the mapped point. Overlays (including other iframes) and inaccessible shadow-root hit paths are rejected. Validate the leaf element separately and use the returned point unchanged; these are snapshot-time checks, not protection against subsequent page mutation.

Horizontal dragging and cleanup

page.human_drag(selector, dx), element.human_drag_by(dx) and Human::drag_by(x, y, dx) drag with overshoot and settling. Human::drag_horizontal_by(x, y, dx) keeps Y fixed and X monotonic. Drags preserve other held buttons and reject an already-held left button. Retain the helper across cancellation to confirm release before further input:

let human = page.human();
let result = tokio::time::timeout(
    std::time::Duration::from_secs(5),
    human.drag_horizontal_by(120.0, 120.0, 150.0),
).await;
human.finish_drag_cleanup().await?;
result??;

Release has a separate three-second timeout. Cancelled cleanup waits can be resumed; dropping the helper only schedules best-effort release. Cleanup failures require inspection.

Frame response capture

page.capture_frame_responses(frame_id, options) captures responses for exactly one frame, surviving its removal. Use snapshot() for retained records and stop().await for cleanup and loss/error counters; Drop does not wait. Bodies and headers are opt-in. Defaults: 128 records, 64 KiB/body, 1 MiB total. Limits bound retention, not transient CDP payloads; Debug omits body/header values. Fetch headers do not prove which cookies were sent on the wire.

Low-level request ownership

eoka::cdp::Transport provides an opt-in request-stage Fetch route per session:

  • install_request_route(session, bounded_sender, dropped_counter) claims ownership; a duplicate owner is rejected. Delivered RequestPause values belong to the consumer and must be resolved once, including on shutdown.
  • set_request_interception(session, Some(patterns)) configures interception. None restores the base policy. Header stripping/proxy authentication may require wildcard request interception; consumers then filter URLs themselves.
  • remove_request_route(session) removes future ownership only. Unowned, full-queue and closed-queue events are auto-continued; queue failures increment the supplied counter. Already-delivered pauses still need resolution.

RequestPause::continue_request() preserves the header-stripping policy. For cancellable work, use continue_request_with_dispatch() or Transport::send_to_session_with_dispatch() with a fresh eoka::cdp::transport::CommandDispatch token. may_have_been_sent() is irreversible uncertainty, not acknowledgment: never replay a possibly sent resolution after an error/timeout. A false observation permits handoff only after the originating future has terminated or been dropped. Tokens cannot be reused. Cancellation removes the local pending waiter, not the remote command. Raw pause payloads can contain sensitive request metadata; avoid logging them.

Page Info & Debug

page.url().await?;
page.title().await?;
page.content().await?;              // full HTML
page.text().await?;                 // visible text
page.screenshot().await?;           // PNG bytes
page.screenshot_jpeg(80).await?;    // JPEG at quality 80
page.debug_state().await?;          // PageState with element counts
page.debug_screenshot("step1").await?; // timestamped screenshot

Multi-Tab

let page1 = browser.new_page("https://a.com").await?;
let page2 = browser.new_page("https://b.com").await?;
browser.activate_tab(page1.target_id()).await?;
browser.close_tab(page2.target_id()).await?;

Browser ownership and debugging ports

Explicit debugging ports are preserved; live launches default to a nonzero port. close() gives owned browsers up to five seconds to flush state before termination. Attached browsers are only disconnected, regardless of live-mode configuration.

Connect to an existing Chrome

Attach to a browser you already launched with --remote-debugging-port instead of spawning one. Defaults to StealthConfig::live(), so the user's tabs are left untouched (no evasion injection).

// Start Chrome yourself: chrome --remote-debugging-port=9222
let browser = Browser::connect_port(9222).await?;           // HTTP discovery
// or, with the ws:// URL from http://localhost:9222/json/version:
let browser = Browser::connect("ws://127.0.0.1:9222/devtools/browser/...").await?;

for tab in browser.tabs().await? {
    println!("{} — {}", tab.title, tab.url);
}
let page = browser.attach_page(&target_id).await?;
browser.disconnect().await?;                                // leaves Chrome running

Navigation

page.goto("https://example.com").await?;
page.goto_with_referrer("https://example.com", "https://google.com").await?;
page.goto_with_headers("https://example.com", headers).await?;
page.reload().await?;
page.back().await?;
page.forward().await?;

Network & Cookies

let cookies = page.cookies().await?;
page.set_cookie("name", "value", Some("example.com"), None).await?;
page.delete_cookie("name", None).await?;
page.clear_all_cookies().await?;

page.enable_request_capture().await?;       // start capturing XHR/fetch
let body = page.get_response_body(id).await?;
page.disable_request_capture().await?;

For bounded text inspection with the page's credentials:

let request = eoka::BoundedFetchRequest::get("/api/me");
let response = page.fetch_bounded(&request).await?;
assert!(response.bytes_read <= 8192);

max_bytes accepts zero (headers only) through MAX_TEXT_FETCH_BYTES (16 MiB). Known binary MIME bodies are omitted. Reading cancels at the limit and reports conservative truncation; incomplete trailing UTF-8 is omitted. This bounds retained text, not Chrome's native buffers. The original Page::fetch API is unchanged.

For native files, browser.watch_downloads(&staging_directory) exclusively configures allowAndName and subscribes before the caller triggers input. DownloadWatch exposes beginning/progress events, cancellation, popup ancestry, and explicit stop() cleanup. Only owned browsers are supported. Target discovery is enabled for the watch and disabled on restoration; this assumes no competing owner of browser download or target-discovery settings. Event loss/disconnection fails; failed restoration prevents further watchers on that browser. Drop schedules bounded restoration but cannot confirm it to the caller.

page.navigate_for_download(url, referrer) accepts native attachment navigation; a returned navigation result alone never proves a file downloaded. Wait for native completion and verify the regular file under its GUID. Untrusted suggested names must not determine filesystem paths. Destination handling, jobs and no-overwrite publication live in the sister eoka-tools repository. Core regression: cargo test --lib download::.

Configuration & Dialogs

page.set_bypass_csp(true).await?;           // disable CSP
page.set_javascript_enabled(false).await?;  // disable JS entirely (before navigation)
page.set_user_agent("custom UA").await?;
page.ignore_cert_errors(true).await?;
page.accept_dialog(None).await?;            // accept alert/confirm
page.dismiss_dialog().await?;               // dismiss dialog

page.ignore_cert_errors takes effect only for navigations issued after the call — too late for new_page(url)'s own initial navigate. For a bad cert on the very first load (e.g. an .onion service redirecting http:// → untrusted https://), set StealthConfig.ignore_cert_errors = true instead, or use new_blank_page() + ignore_cert_errors(true) + goto().

Retry

page.with_retry(3, 500, || async {
    page.human_click("#flaky").await
}).await?;

Config

Most code does not need to construct a config. Browser::launch() starts with stealth defaults in headless mode. Browser::launch_visible() and Browser::launch_debug() are explicit opt-ins for local workflows that need a window.

For small tweaks, mutate the default config inline:

let browser = Browser::launch_with(|config| {
    config.headless = false;
    config.proxy = Some("http://127.0.0.1:8080".into());
}).await?;

Two server-side reputation signals are handled automatically for spawned stealth browsers (see StealthConfig):

  • strip_x_client_data: true (default) — Chrome's X-Client-Data request header (field-trial variation IDs) is stripped via CDP Fetch interception on every page, and --disable-field-trial-config is passed at launch.
  • geo_align: false — opt-in. Aligns timezone and navigator.languages with the browser's apparent public IP via a one-shot lookup before the first real navigation. Ignored when timezone is set explicitly.

For reusable presets or advanced setup, build a StealthConfig directly:

let config = StealthConfig {
    headless: false,
    patch_binary: true,
    human_mouse: true,
    human_typing: true,
    debug: true,
    ..Default::default()
};

let browser = Browser::launch_with_config(config).await?;

// Presets for advanced config composition
StealthConfig::visible()   // headless: false
StealthConfig::debug()     // headless: false, debug: true

Detection Results

Patches Chrome binary, injects 15 evasion scripts, blocks detectable CDP commands at the transport layer, simulates human input with Bezier curves.

  • Passes: sannysoft, rebrowser bot detector (6/6), areyouheadless, browserleaks
  • Partial: creepjs (33% trust score)

How it Works

~9K lines of Rust (about 1.3K of that is tests). No chromiumoxide, no puppeteer-extra. Hand-written CDP types for the ~30 commands actually needed. Minimal dependency graph.

src/
├── cdp/           # raw websocket transport, command filtering
├── stealth/       # evasions, binary patcher, human simulation
├── browser.rs     # chrome launcher
├── page.rs        # page api
└── session.rs     # cookie export

The key insight: most detection comes from CDP commands leaking (Runtime.enable fires consoleAPICalled events that pages can detect). eoka blocks those at the transport layer and defines navigator properties on the prototype instead of the instance.

Ecosystem

Crate Description
eoka-agent AI agent layer with MCP server
eoka-runner Config-based automation (YAML flows)

License

MIT