craw_spider/spiders/yaoshibang/yidun_slider_captcha.py

"""易盾滑块验证码：云码识别 + 模拟拖拽。"""
import base64
import math
import random
import time

import requests

from commons.Logger import logger

CAPTCHA_TOKEN = "zPzmt1mG1ouCU6GTzsZN2Lmm8pdZypapPcLJTBRETco"
CAPTCHA_API_URL = "http://api.jfbym.com/api/YmServer/customApi"

SLIDER_OFFSET_FIX = 10


def call_captcha_api(image_bytes):
    """调用云码平台识别滑块距离，失败返回 None。"""
    try:
        b64 = base64.b64encode(image_bytes).decode()
        resp = requests.post(
            CAPTCHA_API_URL,
            json={"token": CAPTCHA_TOKEN, "type": "22222", "image": b64},
            headers={"Content-Type": "application/json"},
            timeout=15,
        ).json()
        logger.info("验证码 API 返回: %s", resp)
        if not isinstance(resp, dict):
            return None
        data = resp.get("data")
        if isinstance(data, dict):
            dist = data.get("data")
        else:
            dist = data
        if dist is None:
            logger.error("验证码 API 未返回距离字段: %s", resp)
            return None
        try:
            d = float(dist)
        except (TypeError, ValueError):
            logger.error("验证码距离无法解析为数字: %r", dist)
            return None
        if not math.isfinite(d):
            logger.error("验证码距离非有限数值: %r", dist)
            return None
        return d
    except Exception as e:
        logger.exception("验证码 API 调用失败: %s", e)
        return None


def generate_human_track(distance):
    try:
        distance = float(distance)
    except (TypeError, ValueError):
        return []
    if distance <= 0 or not math.isfinite(distance):
        return []
    tracks = []
    current = 0
    mid = distance * 0.7
    t = 0.2
    v = 0
    move_points = []

    while current < mid:
        a = random.uniform(2, 4)
        v0 = v
        v = v0 + a * t
        move = v0 * t + 0.5 * a * t * t
        current += move
        move_points.append(move)

    while current < distance:
        a = -random.uniform(0.5, 1.5)
        v0 = v
        v = v0 + a * t
        if v < 0.5:
            v = 0.5
        move = v0 * t + 0.5 * a * t * t
        current += move
        move_points.append(move)

    total_points = len(move_points)
    for i, move in enumerate(move_points):
        y_offset = random.randint(-2, 2) if i % random.randint(2, 4) == 0 else 0

        if i < total_points * 0.3:
            duration = random.uniform(0.01, 0.03)
        elif i > total_points * 0.7:
            duration = random.uniform(0.03, 0.08)
        else:
            duration = random.uniform(0.02, 0.05)

        if random.random() < 0.05:
            duration += random.uniform(0.05, 0.1)

        tracks.append((move, y_offset, duration))

    if random.random() < 0.7:
        tracks.append((-random.randint(1, 3), 0, 0.05))

    return tracks


def simulate_slider_drag(driver, slider_element, target_distance):
    if target_distance <= 0:
        logger.warning("滑块目标距离无效: %s", target_distance)
        return
    driver.actions.move_to(slider_element).hold()
    for offset_x, offset_y, duration in generate_human_track(target_distance):
        driver.actions.move(offset_x, offset_y, duration=duration / 1000)
    driver.actions.release()


def solve_slider_captcha(driver):
    """检测并处理易盾滑块验证码，成功返回 True。"""
    driver.wait.doc_loaded()
    time.sleep(2)

    yidun = driver.ele("xpath://div[@class='yidun_modal']", timeout=3)
    if not yidun:
        return True

    logger.info("检测到滑块验证码，开始处理")
    jpg_bytes = yidun.get_screenshot(as_bytes="jpg")

    distance = call_captcha_api(jpg_bytes)
    if distance is None:
        logger.error("验证码识别失败")
        return False

    logger.info("滑块距离: %s", distance)
    slider = driver.ele(
        "xpath://div[contains(@class,'yidun_slider--hover')]", timeout=5
    )
    if not slider:
        logger.error("未找到滑块元素")
        return False

    try:
        drag_distance = float(distance) + SLIDER_OFFSET_FIX
    except (TypeError, ValueError):
        logger.error("滑块距离非数字: %r", distance)
        return False

    if not math.isfinite(drag_distance) or drag_distance <= 0:
        logger.error("滑块距离无效: %s", drag_distance)
        return False
    simulate_slider_drag(driver, slider, drag_distance-6)
    time.sleep(3)
    return True