scrapy-stealth 0.6.2a1

Stealthy Crawling. Maximum Results. A pluggable anti-bot and stealth framework for Scrapy.

scrapy-stealth

Stealthy Crawling. Maximum Results.

A pluggable anti-bot and stealth framework for Scrapy.

scrapy-stealth extends Scrapy with browser impersonation, proxy rotation, fingerprint cycling, and intelligent retry strategies — designed for large-scale, production-grade crawling.

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🧠 Why scrapy-stealth?

Scrapy is fast and powerful, but modern websites use advanced anti-bot protections such as:

• TLS fingerprinting
• Browser behavior detection
• Rate limiting and IP blocking

scrapy-stealth helps by adding:

• 🧬 Browser-level impersonation (TLS + HTTP/2 fingerprints)
• 🔁 Smarter retry strategies
• 🌐 Proxy and fingerprint rotation
• 🛡️ Anti-bot detection

Result

• Higher success rate
• Lower proxy cost
• More stable crawls

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📊 Comparison

Feature	scrapy-stealth	scrapy-playwright	scrapy-splash	scrapy-selenium	Scrapy (default)
TLS fingerprint spoofing	✅	❌	❌	❌	❌
HTTP/2 support	✅	✅	❌	❌	❌
Browser impersonation	✅	⚠️ partial	❌	❌	❌
Proxy rotation (built-in)	✅	❌	❌	❌	❌
Fingerprint rotation	✅	❌	❌	❌	❌
Anti-bot detection	✅	❌	❌	❌	❌
Smart retry logic	✅	❌	❌	❌	❌
Per-request engine switching	✅	❌	❌	❌	❌
Headless browser required	✅	✅	✅	✅	❌
JavaScript rendering	️✅	✅	✅	✅	❌
Native Scrapy integration	✅	✅	✅	⚠️ partial	✅
Memory footprint	🟢 Low	🔴 High	🔴 High	🔴 High	🟢 Low

⚠️ scrapy-playwright passes real browser TLS but does not spoof fingerprint profiles like scrapy-stealth does. JavaScript rendering is available via the optional browser driver — use it selectively for pages that require a full browser.

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✨ Features

• 🔌 Pluggable engine system (scrapy, stealth)
• 🧠 Per-request engine selection via request.meta
• 🌐 Proxy support and rotation
• 🧬 Browser fingerprint rotation
• 🔁 Smart retry logic
• 🛡️ Anti-bot detection (status + content-based, Cloudflare, Akamai)
• ⚡ Thread-safe async integration
• 🖥️ Real-browser engine (CDP) for JS-heavy pages
• 📸 Built-in snapshot decorator (scrapy_stealth.decorators.snapshot)

---

📦 Installation

pip install scrapy-stealth

Requires Python 3.11+ and Scrapy 2.12–2.x

---

⚙️ Setup

Option 1 — Global (settings.py)

# 1. Enable the middleware
DOWNLOADER_MIDDLEWARES = {
    "scrapy_stealth.middlewares.stealth.StealthDownloaderMiddleware": 950,
}

# 2. (Optional) Proxy list for automatic rotation
#    Used when request.meta["stealth"]["rotate_proxy"] = True
#    Supported schemes: http, https, socks4, socks5
#    Each entry must include a scheme and port
STEALTH_PROXIES = [
    "http://proxy1:8080",
    "http://proxy2:8080",
    "http://user:pass@proxy3:8080",  # with authentication
    "socks5://proxy4:1080",
]

Option 2 — Per-spider (custom_settings)

Configure the middleware and proxies directly on the spider — no changes to settings.py required. Each spider can have its own independent proxy list.

class MySpider(scrapy.Spider):
    name = "example"

    custom_settings = {
        "DOWNLOADER_MIDDLEWARES": {
            "scrapy_stealth.middlewares.stealth.StealthDownloaderMiddleware": 950,
        },
        "STEALTH_PROXIES": [
            "http://proxy1:8080",
            "http://user:pass@proxy2:8080",
            "socks5://proxy3:1080",
        ],
    }

Proxies are validated at startup — invalid format or unsupported scheme raises ValueError immediately.

---

🚀 Quick Start

yield scrapy.Request(
    url="https://example.com",
    meta={"stealth": {}},
)

---

🔧 Global Configuration

Customise package-wide defaults via the shared config instance. All settings must be applied at module level, before the spider class — the engine client is created at middleware initialisation, so changes inside start_requests or parse will have no effect.

# myspider.py
import scrapy
from scrapy_stealth.config import config

config.DEFAULT_ENGINE  = "stealth"      # "scrapy" (native) or "stealth" (browser impersonation)
config.DEFAULT_PROFILE = "chrome_147"   # browser profile when meta["stealth"]["profile"] is not set
config.DEFAULT_TIMEOUT = 30             # stealth request timeout in seconds
config.STEALTH_DRIVER  = "turbo"        # "basic" (default), "turbo", or "browser"
config.HTTP2           = True           # False for servers that only support HTTP/1.1
config.BLOCK_CODES    |= {407}          # extend blocked status codes (|= keeps defaults)
config.BLOCK_KEYWORDS.append("banned")  # extend blocked body-text patterns
config.BROWSER_HEADLESS = True          # browser driver: headless mode (False = visible window, more stealthy)
config.BROWSER_SETTLE_S = 4.0          # browser driver: seconds to wait after navigation for JS to finish


class MySpider(scrapy.Spider):
    name = "example"
    ...

# ❌ wrong — too late, the engine client is already created
class MySpider(scrapy.Spider):
    def start_requests(self):
        config.HTTP2 = False  # has no effect
        ...

You can also read any value programmatically:

config.get("DEFAULT_ENGINE")          # "scrapy"
config.get("MISSING_KEY", "default")  # "default"

Attribute	Type	Default	Description
DEFAULT_ENGINE	str	"scrapy"	Engine used when request.meta["stealth"] key is absent
DEFAULT_PROFILE	str	"chrome_147"	Browser profile used when none is specified
DEFAULT_TIMEOUT	int	30	Request timeout in seconds
STEALTH_DRIVER	str	"basic"	Default driver: "basic", "turbo", or "browser"
HTTP2	bool	True	HTTP/2 mode; overridable per-request via meta["stealth"]["http2"]
BLOCK_CODES	frozenset[int]	{403, 429, 503}	HTTP status codes considered blocked
BLOCK_KEYWORDS	list[str]	["captcha", "access denied", …]	Body-text patterns considered blocked
BROWSER_HEADLESS	bool	True	Browser driver: headless mode (False = visible window, more stealthy)
BROWSER_SETTLE_S	float	4.0	Browser driver: seconds to wait after navigation for JS to finish rendering

For one-off overrides on a single request, set meta["stealth"]["driver"] or meta["stealth"]["http2"] (see Per-Request Configuration below).

---

⚙️ Per-Request Configuration

All options are passed via request.meta["stealth"]:

The presence of meta["stealth"] activates the stealth engine. Omit the key entirely to use the default Scrapy engine.

yield scrapy.Request(
    url,
    meta={
        "stealth": {
            "driver": "turbo",
            "profile": "chrome_147",
            "proxy": "http://user:pass@proxy:8080",
            "stealth_timeout": 60,
            "http2": True,
            "rotate_proxy": True,
            "rotate_profile": True,
        }
    },
)

Key	Type	Description
driver	str	"basic", "turbo", or "browser" — overrides config.STEALTH_DRIVER per-request
profile	str	Browser profile (e.g. "chrome_147", "safari_ios_18_1_1")
proxy	str	Explicit proxy URL
stealth_timeout	int	Per-request timeout in seconds (overrides default 30s)
http2	bool	True = HTTP/2, False = HTTP/1.1 (overrides config.HTTP2 for this request)
rotate_proxy	bool	Auto-pick a proxy from STEALTH_PROXIES
rotate_profile	bool	Auto-pick a random browser profile
headless	bool	Browser driver only: True = headless, False = visible window (more stealthy)
settle	float	Browser driver only: seconds to wait for JS after navigation (default 4.0)
snapshot	bool	Browser driver only: capture a PNG snapshot — result available as response.meta["snapshot_content"] (bytes)

---

🖥️ Browser Engine

For sites protected by Cloudflare JS challenges or heavy JavaScript rendering, use the browser driver. It runs a real Chrome instance via the DevTools Protocol (no WebDriver), keeping one persistent browser and opening a new tab per request.

Per-request (most common):

yield scrapy.Request(
    url,
    meta={
        "stealth": {
            "driver": "browser",
            "headless": False,   # visible window — harder to detect (default: True)
            "settle": 4.0,       # seconds to wait for JS after page load
        }
    },
)

Heavy Cloudflare sites — increase settle time:

meta={"stealth": {"driver": "browser", "headless": False, "settle": 12}}

Global default (all stealth requests use browser engine):

from scrapy_stealth.config import config

config.STEALTH_DRIVER   = "browser"
config.BROWSER_HEADLESS = False   # more stealthy
config.BROWSER_SETTLE_S = 6.0    # longer wait for JS

Performance note: the browser engine is slower than basic/turbo (~5-15s per page vs <2s). Use it selectively — route only JS-protected URLs to "browser" and keep everything else on "turbo".

---

📸 Screenshots

Capture a PNG screenshot of any page rendered by the browser driver and save it to disk.

Enable on the request

yield scrapy.Request(
    url,
    meta={
        "stealth": {
            "driver": "browser",
            "snapshot": True,
        }
    },
    callback=self.parse,
)

The raw PNG bytes are available at response.meta["snapshot_content"] inside your callback.

Auto-save with snapshot decorator

from scrapy_stealth.decorators import snapshot

class MySpider(scrapy.Spider):

    @snapshot
    def parse(self, response): ...

    @snapshot(path="stealth_shots/page.png")
    def parse(self, response): ...

    @snapshot(path=lambda r: r.url.split("/")[-1] + ".png")
    def parse(self, response): ...

Note: Requires driver="browser" and snapshot=True in the request meta. Logs an error if no snapshot data is found in the response.

Custom handling (without the built-in helper)

The screenshot is just bytes in response.meta["snapshot_content"] — do anything you like with it:

def parse(self, response):
    shot: bytes | None = response.meta.get("snapshot_content")
    if shot is None:
        return  # screenshot was not requested or capture failed

    # Save manually
    with open("page.png", "wb") as f:
        f.write(shot)

    # Pass to a pipeline via item
    yield {"url": response.url, "screenshot": shot}

---

🔁 Automatic Rotation

yield scrapy.Request(
    url,
    meta={
        "stealth": {
            "rotate_proxy": True,
            "rotate_profile": True,
        }
    },
)

---

🧩 Strategies

Proxy Rotation

from scrapy_stealth.strategies.proxy import ProxyRotator

proxy_rotator = ProxyRotator([
    "http://proxy1:8080",
    "http://proxy2:8080",
])

yield scrapy.Request(
    url,
    meta={
        "stealth": {
            "proxy": proxy_rotator.get(),
        }
    },
)

---

Fingerprint Rotation

from scrapy_stealth.strategies.fingerprint import ProfileRotator

fp = ProfileRotator()

yield scrapy.Request(
    url,
    meta={
        "stealth": {
            "profile": fp.get(),
        }
    },
)

---

Intelligent Retry

from scrapy_stealth.strategies.retry import RetryHandler

retry = RetryHandler()


def parse(self, response):
    if retry.should_retry(response):
        yield retry.build(response.request)
        return

---

🛡️ Anti-Bot Detection

from scrapy_stealth.detectors.antibot import AntiBotDetector

detector = AntiBotDetector()

if detector.is_blocked(response):
    print("Blocked!")

---

📊 Example

import scrapy


class ExampleSpider(scrapy.Spider):
    name = "example"

    def start_requests(self):
        yield scrapy.Request(
            "https://example.com",
            meta={
                "stealth": {
                    "rotate_proxy": True,
                    "rotate_profile": True,
                }
            },
        )

    def parse(self, response):
        yield {
            "title": response.css("title::text").get(),
            "url": response.url,
        }

---

⚡ Performance Insight

Using stealth selectively:

• ⚡ Faster crawling (Scrapy for simple pages)
• 💰 Lower proxy cost
• 🛡️ Better success rate on protected pages

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📜 Changelog

See CHANGELOG.md for a full history of changes, or browse GitHub Releases.

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🤝 Contributing

See CONTRIBUTING.md for guidelines on how to contribute.

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📄 License

This project is licensed under the MIT License — free to use, modify, and distribute. See LICENSE for the full text.