File size: 11,473 Bytes
3a04f21 c00180e 3a04f21 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 | """reCAPTCHA v2 solver using Playwright browser automation.
Supports NoCaptchaTaskProxyless, RecaptchaV2TaskProxyless,
and RecaptchaV2EnterpriseTaskProxyless task types.
Strategy:
1. Visit the target page with a realistic browser context.
2. Click the reCAPTCHA checkbox.
3. If the challenge dialog appears (bot detected), switch to the audio
challenge, download the audio file, transcribe it via the configured
speech-to-text model, and submit the text.
4. Extract the gRecaptchaResponse token.
"""
from __future__ import annotations
import asyncio
import logging
from typing import Any
import httpx
from playwright.async_api import Browser, Playwright, async_playwright
from ..core.config import Config
log = logging.getLogger(__name__)
_STEALTH_JS = """
Object.defineProperty(navigator, 'webdriver', {get: () => undefined});
Object.defineProperty(navigator, 'languages', {get: () => ['en-US', 'en']});
Object.defineProperty(navigator, 'plugins', {get: () => [1, 2, 3, 4, 5]});
window.chrome = {runtime: {}, loadTimes: () => {}, csi: () => {}};
"""
_EXTRACT_TOKEN_JS = """
() => {
const textarea = document.querySelector('#g-recaptcha-response')
|| document.querySelector('[name="g-recaptcha-response"]');
if (textarea && textarea.value && textarea.value.length > 20) {
return textarea.value;
}
const gr = window.grecaptcha?.enterprise || window.grecaptcha;
if (gr && typeof gr.getResponse === 'function') {
const resp = gr.getResponse();
if (resp && resp.length > 20) return resp;
}
return null;
}
"""
class RecaptchaV2Solver:
"""Solves reCAPTCHA v2 tasks via headless Chromium with checkbox clicking.
Falls back to the audio challenge path when Google presents a visual
challenge to the headless browser.
"""
def __init__(self, config: Config, browser: Browser | None = None) -> None:
self._config = config
self._playwright: Playwright | None = None
self._browser: Browser | None = browser
self._owns_browser = browser is None
self._start_lock = asyncio.Lock()
async def start(self) -> None:
if self._browser is not None:
return
async with self._start_lock:
if self._browser is not None:
return
playwright = await async_playwright().start()
try:
browser = await playwright.chromium.launch(
headless=self._config.browser_headless,
args=[
"--disable-blink-features=AutomationControlled",
"--no-sandbox",
"--disable-dev-shm-usage",
"--disable-gpu",
],
)
except Exception:
await playwright.stop()
raise
self._playwright = playwright
self._browser = browser
log.info("RecaptchaV2Solver browser started lazily")
async def stop(self) -> None:
async with self._start_lock:
if self._owns_browser:
if self._browser:
await self._browser.close()
self._browser = None
if self._playwright:
await self._playwright.stop()
self._playwright = None
log.info("RecaptchaV2Solver stopped")
async def solve(self, params: dict[str, Any]) -> dict[str, Any]:
await self.start()
website_url = params["websiteURL"]
website_key = params["websiteKey"]
is_invisible = params.get("isInvisible", False)
last_error: Exception | None = None
for attempt in range(self._config.captcha_retries):
try:
token = await self._solve_once(website_url, website_key, is_invisible)
return {"gRecaptchaResponse": token}
except Exception as exc:
last_error = exc
log.warning(
"reCAPTCHA v2 attempt %d/%d failed: %s",
attempt + 1,
self._config.captcha_retries,
exc,
)
if attempt < self._config.captcha_retries - 1:
await asyncio.sleep(2)
raise RuntimeError(
f"reCAPTCHA v2 failed after {self._config.captcha_retries} attempts: {last_error}"
)
async def _solve_once(
self, website_url: str, website_key: str, is_invisible: bool
) -> str:
assert self._browser is not None
context = await self._browser.new_context(
user_agent=(
"Mozilla/5.0 (Windows NT 10.0; Win64; x64) "
"AppleWebKit/537.36 (KHTML, like Gecko) "
"Chrome/131.0.0.0 Safari/537.36"
),
viewport={"width": 1920, "height": 1080},
locale="en-US",
)
page = await context.new_page()
await page.add_init_script(_STEALTH_JS)
try:
timeout_ms = self._config.browser_timeout * 1000
await page.goto(website_url, wait_until="networkidle", timeout=timeout_ms)
await page.mouse.move(400, 300)
await asyncio.sleep(0.5)
if is_invisible:
token = await page.evaluate(
"""
([key]) => new Promise((resolve, reject) => {
const gr = window.grecaptcha?.enterprise || window.grecaptcha;
if (!gr) { reject(new Error('grecaptcha not found')); return; }
gr.ready(() => {
gr.execute(key).then(resolve).catch(reject);
});
})
""",
[website_key],
)
else:
token = await self._solve_checkbox(page)
if not isinstance(token, str) or len(token) < 20:
raise RuntimeError(f"Invalid reCAPTCHA v2 token: {token!r}")
log.info("Got reCAPTCHA v2 token (len=%d)", len(token))
return token
finally:
await context.close()
async def _solve_checkbox(self, page: Any) -> str | None:
"""Click the reCAPTCHA checkbox. If a visual challenge appears, try audio path."""
# The checkbox iframe always has title="reCAPTCHA"
checkbox_frame = page.frame_locator('iframe[title="reCAPTCHA"]').first
checkbox = checkbox_frame.locator("#recaptcha-anchor")
await checkbox.click(timeout=10_000)
await asyncio.sleep(2)
# Check if token was issued immediately (low-risk sessions)
token = await page.evaluate(_EXTRACT_TOKEN_JS)
if isinstance(token, str) and len(token) > 20:
return token
# Challenge dialog appeared — try audio challenge path
log.info("reCAPTCHA challenge detected, attempting audio path")
try:
token = await self._solve_audio_challenge(page)
except Exception as exc:
log.warning("Audio challenge path failed: %s", exc)
token = None
return token
async def _solve_audio_challenge(self, page: Any) -> str | None:
"""Click the audio button in the bframe and transcribe the audio."""
# The challenge bframe has title containing "recaptcha challenge"
bframe = page.frame_locator('iframe[title*="recaptcha challenge"]')
# Click the audio challenge button
audio_btn = bframe.locator("#recaptcha-audio-button")
await audio_btn.click(timeout=8_000)
# Wait for the audio challenge iframe to load its content
await asyncio.sleep(3)
# After clicking audio, a new bframe is rendered with the audio player
bframe = page.frame_locator('iframe[title*="recaptcha challenge"]')
# Get the audio source URL — try multiple selectors
audio_src = None
for selector in [
".rc-audiochallenge-tdownload-link",
"a[href*='.mp3']",
"audio source",
]:
try:
element = bframe.locator(selector).first
audio_src = await element.get_attribute("href", timeout=5_000) or await element.get_attribute("src", timeout=1_000)
if audio_src:
break
except Exception:
continue
if not audio_src:
raise RuntimeError("Could not find audio challenge download link")
# Download the audio file
async with httpx.AsyncClient(timeout=30) as client:
resp = await client.get(audio_src)
resp.raise_for_status()
audio_bytes = resp.content
# Transcribe via the vision/language model (base64 audio → text)
transcript = await self._transcribe_audio(audio_bytes)
log.info("Audio transcribed: %r", transcript[:40] if transcript else None)
if not transcript:
raise RuntimeError("Audio transcription returned empty result")
# Submit the transcript
audio_input = bframe.locator("#audio-response")
await audio_input.fill(transcript.strip().lower())
verify_btn = bframe.locator("#recaptcha-verify-button")
await verify_btn.click(timeout=8_000)
await asyncio.sleep(2)
return await page.evaluate(_EXTRACT_TOKEN_JS)
async def _transcribe_audio(self, audio_bytes: bytes) -> str | None:
"""Send audio bytes to the OpenAI-compatible audio transcription endpoint."""
import base64
audio_b64 = base64.b64encode(audio_bytes).decode()
payload = {
"model": self._config.captcha_model,
"messages": [
{
"role": "user",
"content": [
{
"type": "text",
"text": (
"This is a reCAPTCHA audio challenge. "
"The audio contains spoken digits or words. "
"Transcribe exactly what is spoken, digits only, "
"separated by spaces. Reply with only the transcription."
),
},
{
"type": "image_url",
"image_url": {"url": f"data:audio/mp3;base64,{audio_b64}"},
},
],
}
],
"max_tokens": 50,
"temperature": 0,
}
async with httpx.AsyncClient(timeout=30) as client:
resp = await client.post(
f"{self._config.captcha_base_url}/chat/completions",
headers={"Authorization": f"Bearer {self._config.captcha_api_key}"},
json=payload,
)
if resp.status_code != 200:
raise RuntimeError(f"Transcription API error {resp.status_code}: {resp.text[:200]}")
data = resp.json()
return data["choices"][0]["message"]["content"].strip()
|