Crate nab 

nab - Ultra-minimal browser engine

Features

• HTTP Acceleration: HTTP/2 multiplexing, TLS 1.3, Brotli/Zstd compression
• Browser Fingerprinting: Realistic Chrome/Firefox/Safari profiles
• Authentication: 1Password CLI integration, cookie extraction
• JavaScript: QuickJS engine with minimal DOM

Example

use nab::AcceleratedClient;

#[tokio::main]
async fn main() -> anyhow::Result<()> {
    let client = AcceleratedClient::new()?;
    let html = client.fetch_text("https://example.com").await?;
    println!("Fetched {} bytes", html.len());
    Ok(())
}

Re-exports

pub use error::NabError;

pub use api_discovery::ApiDiscovery;

pub use api_discovery::ApiEndpoint;

pub use auth::CookieSource;

pub use auth::Credential;

pub use auth::CredentialRetriever;

pub use auth::CredentialSource;

pub use auth::OnePasswordAuth;

pub use auth::OtpCode;

pub use auth::OtpRetriever;

pub use auth::OtpSource;

pub use browser_detect::BrowserType;

pub use browser_detect::detect_default_browser;

pub use fingerprint::BrowserProfile;

pub use fingerprint::chrome_profile;

pub use fingerprint::firefox_profile;

pub use fingerprint::random_profile;

pub use fingerprint::safari_profile;

pub use form::Form;

pub use form::parse_field_args;

pub use http_client::AcceleratedClient;

pub use http_client::SafeFetchConfig;

pub use http_client::SafeFetchResponse;

pub use http3_client::Http3Client;

pub use http3_client::Http3Response;

pub use login::LoginFlow;

pub use login::LoginResult;

pub use login::get_session_dir;

pub use mfa::MfaHandler;

pub use mfa::MfaResult;

pub use mfa::MfaType;

pub use mfa::NotificationConfig;

pub use mfa::detect_mfa_type;

pub use prefetch::EarlyHintLink;

pub use prefetch::EarlyHints;

pub use prefetch::PrefetchManager;

pub use prefetch::extract_link_hints;

pub use session::MAX_SESSIONS;

pub use session::SessionStore;

pub use ssrf::DEFAULT_MAX_BODY_SIZE;

pub use ssrf::DEFAULT_MAX_REDIRECTS;

pub use ssrf::extract_mapped_ipv4;

pub use ssrf::is_denied_ipv4;

pub use ssrf::is_denied_ipv6;

pub use ssrf::validate_ip;

pub use ssrf::validate_redirect_target;

pub use ssrf::validate_url;

pub use stream::StreamBackend;

pub use stream::StreamInfo;

pub use stream::StreamProvider;

pub use websocket::JsonRpcWebSocket;

pub use websocket::WebSocket;

pub use websocket::WebSocketMessage;

Modules

api_discovery

Static API Endpoint Discovery

arena

Arena Allocator for Response Buffering

auth

Authentication Module

browser_detect

Browser Detection

content

Content-type-aware response conversion.

error

Stable error type hierarchy for the nab public API.

fingerprint

Browser Fingerprint Spoofing

form

Form parsing and submission

http3_client

HTTP/3 + QUIC Client

http_client

High-Performance HTTP Client

impersonate_client

TLS fingerprint impersonation for anti-bot bypass.

login

Auto-login orchestration

mfa

Multi-Factor Authentication Flow Handler

plugin

External plugin system for custom SiteProvider implementations.

prefetch

Prefetch & Early Hints (103)

rate_limit

Per-domain rate limiter for concurrent HTTP fetching.

session

Persistent named sessions for the nab-mcp server.

site

Site-specific content extraction.

ssrf

SSRF (Server-Side Request Forgery) protection.

stream

Streaming media support for nab.

websocket

WebSocket Client with TLS

Constants

VERSION

Version of nab