ranbot-ai/go-rod-master

Go-Rod Browser Automation Master

Overview

Rod is a high-level Go driver built directly on the Chrome DevTools Protocol for browser automation and web scraping. Unlike wrappers around other tools, Rod communicates with the browser natively via CDP, providing thread-safe operations, chained context design for timeouts/cancellation, auto-wait for elements, correct iframe/shadow DOM handling, and zero zombie browser processes.

The companion library go-rod/stealth injects anti-bot-detection evasions based on puppeteer-extra stealth, hiding headless browser fingerprints from detection systems.

When to Use This Skill

• Use when the user asks to scrape, automate, or test a website using Go.
• Use when the user needs a headless browser for dynamic/SPA content (React, Vue, Angular).
• Use when the user mentions stealth, anti-bot, avoiding detection, Cloudflare, or bot detection bypass.
• Use when the user wants to work with the Chrome DevTools Protocol (CDP) directly from Go.
• Use when the user needs to intercept or hijack network requests in a browser context.
• Use when the user asks about concurrent browser scraping or page pooling in Go.
• Use when the user is migrating from chromedp or Playwright Go and wants a simpler API.

Safety & Risk

Risk Level: 🔵 Safe

• Read-Only by Default: Default behavior is navigating and reading page content (scraping/testing).
• Isolated Contexts: Browser contexts are sandboxed; cookies and storage do not persist unless explicitly saved.
• Resource Cleanup: Designed around Go's defer pattern — browsers and pages close automatically.
• No External Mutations: Does not modify external state unless the script explicitly submits forms or POSTs data.

Installation

# Core rod library
go get github.com/go-rod/rod@latest

# Stealth anti-detection plugin (ALWAYS include for production scraping)
go get github.com/go-rod/stealth@latest

Rod auto-downloads a compatible Chromium binary on first run. To pre-download:

go run github.com/nichochar/go-rod.github.io/cmd/launcher@latest

Core Concepts

Browser Lifecycle

Rod manages three layers: Browser → Page → Element.

// Launch and connect to a browser
browser := rod.New().MustConnect()
defer browser.MustClose()

// Create a page (tab)
page := browser.MustPage("https://example.com")

// Find an element
el := page.MustElement("h1")
fmt.Println(el.MustText())

Must vs Error Patterns

Rod provides two API styles for every operation:

| Style | Method | Use Case | |:------|:-------|:---------| | Must | MustElement(), MustClick(), MustText() | Scripting, debugging, prototyping. Panics on error. | | Error | Element(), Click(), Text() | Production code. Returns error for explicit handling. |

Production pattern:

el, err := page.Element("#login-btn")
if err != nil {
    return fmt.Errorf("login button not found: %w", err)
}
if err := el.Click(proto.InputMouseButtonLeft, 1); err != nil {
    return fmt.Errorf("click failed: %w", err)
}

Scripting pattern with Try:

err := rod.Try(func() {
    page.MustElement("#login-btn").MustClick()
})
if errors.Is(err, context.DeadlineExceeded) {
    log.Println("timeout finding login button")
}

Context & Timeout

Rod uses Go's context.Context for cancellation and timeouts. Context propagates recursively to all child operations.

// Set a 5-second timeout for the entire operation chain
page.Timeout(5 * time.Second).
    MustWaitLoad().
    MustElement("title").
    CancelTimeout(). // subsequent calls are not bound by the 5s timeout
    Timeout(30 * time.Second).
    MustText()

Element Selectors

Rod supports multiple selector strategies:

// CSS selector (most common)
page.MustElement("div.content > p.intro")

// CSS selector with text regex matching
page.MustElementR("button", "Submit|Send")

// XPath
page.MustElementX("//div[@class='content']//p")

// Search across iframes and shadow DOM (like DevTools Ctrl+F)
page.MustSearch(".deeply-nested-element")

Auto-Wait

Rod automatically retries element queries until the element appears or the context times out. You do not need manual sleeps:

// This will automatically wait until the element exists
el := page.MustElement("#dynamic-content")

// Wait until the element is stable (position/size not changing)
el.MustWaitStable().MustClick()

// Wait until page has no pending network requests
wait := page.MustWaitRequestIdle()
page.MustElement("#search").MustInput("query")
wait()

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Stealth & Anti-Bot Detection (go-rod/stealth)

IMPORTANT: For any production scraping or automation against real websit