prod_selec/src/scraper.py

# 【版本：20260115-终极订正版】
# 针对 Python 3.12+ 移除 distutils 的兼容性补丁
import sys
try:
    import distutils
except ImportError:
    from types import ModuleType
    d, v = ModuleType("distutils"), ModuleType("distutils.version")
    d.version = v
    sys.modules.update({"distutils": d, "distutils.version": v})
    class LooseVersion:
        def __init__(self, v): self.v = v
        def __lt__(self, o): return True
        def __str__(self): return str(self.v)
    v.LooseVersion = LooseVersion

import time, random, re, os, subprocess, urllib.parse, json, traceback, socket
from selenium import webdriver
import undetected_chromedriver as uc 
from selenium.webdriver.common.by import By
from selenium.webdriver.common.action_chains import ActionChains
from selenium_stealth import stealth

class Scraper1688:
    def __init__(self, headless=True, status_callback=None, log_callback=None):
        self.headless = headless
        self.status_callback = status_callback
        self.log_callback = log_callback
        self.user_data_path = os.path.abspath(os.path.join(os.getcwd(), "chrome_stable_profile"))
        self.driver = None
        self._cleanup()
        self._init_chrome(headless)
        if self.driver:
            stealth(self.driver, languages=["zh-CN", "zh"], vendor="Google Inc.", platform="Win32", fix_hairline=True)

    def _find_chrome(self):
        """ 强力锁定 Chrome 安装路径 """
        import winreg
        reg_paths = [
            (winreg.HKEY_LOCAL_MACHINE, r"SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\chrome.exe"),
            (winreg.HKEY_CURRENT_USER, r"SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\chrome.exe")
        ]
        for hkey, subkey in reg_paths:
            try:
                with winreg.OpenKey(hkey, subkey) as key:
                    path, _ = winreg.QueryValueEx(key, "")
                    if os.path.exists(path): return path
            except: continue
        return None

    def _cleanup(self):
        if os.name == 'nt':
            for proc in ['chrome.exe', 'chromedriver.exe']:
                try: subprocess.call(['taskkill', '/F', '/IM', proc, '/T'], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
                except: pass
        if os.path.exists(self.user_data_path):
            for root, _, files in os.walk(self.user_data_path):
                for f in files:
                    if "lock" in f.lower() or f == "SingletonLock":
                        try: os.remove(os.path.join(root, f))
                        except: pass

    def _init_chrome(self, headless):
        chrome_path = self._find_chrome()
        def create_options():
            opts = uc.ChromeOptions()
            opts.add_argument(f'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')
            opts.add_argument(f"--user-data-dir={self.user_data_path}")
            if headless: opts.add_argument('--headless=new')
            opts.add_argument('--disable-blink-features=AutomationControlled')
            opts.add_argument("--window-size=1920,1080")
            opts.add_argument("--no-sandbox")
            opts.add_argument("--disable-dev-shm-usage")
            opts.add_argument("--remote-allow-origins=*")
            return opts
        try:
            self.driver = uc.Chrome(options=create_options(), headless=headless, browser_executable_path=chrome_path, use_subprocess=True)
        except Exception as e:
            self.driver = uc.Chrome(options=create_options(), headless=headless, use_subprocess=True)

    def clean_url(self, url):
        """ 【关键订正】极其简化的 ID 提取逻辑，只要是商品就必须进入详情页 """
        if not url: return ""
        # 强制转换为字符串并处理
        url_str = str(url)
        if url_str.startswith("//"): url_str = "https:" + url_str
        
        # 只要能匹配到连续的 9-15 位数字（1688 商品 ID 特征），就重组
        id_match = re.search(r'(\d{9,15})', url_str)
        if id_match:
            standard_url = f"https://detail.1688.com/offer/{id_match.group(1)}.html"
            return standard_url
        return ""

    def check_for_captcha(self):
        def is_blocked():
            try:
                url, src = self.driver.current_url.lower(), self.driver.page_source.lower()
                sliders = self.driver.find_elements(By.ID, "nc_1_n1z")
                return (len(sliders) > 0 and sliders[0].is_displayed()) or "login.1688.com" in url or "punish" in url or "哎哟喂" in src
            except: return False
        if is_blocked():
            msg = "请登录验证"
            if self.status_callback: self.status_callback(True, msg)
            while is_blocked(): time.sleep(2)
            if self.status_callback: self.status_callback(False, "验证通过")
            time.sleep(3)
        return True

    def search_products_yield(self, keyword, total_count=200, existing_links=None):
        gbk_keyword = urllib.parse.quote(keyword, encoding='gbk')
        base_url = f"https://s.1688.com/selloffer/offer_search.htm?keywords={gbk_keyword}&n=y&netType=1%2C11%2C16"
        self.driver.get("https://www.1688.com")
        self.check_for_captcha()
        
        all_links = existing_links if existing_links is not None else set()
        page, initial_count = 1, len(all_links)
        
        while len(all_links) < total_count + initial_count:
            print(f"[*] 正在处理列表页: 第 {page} 页...")
            self.driver.get(f"{base_url}&beginPage={page}&page={page}")
            self.check_for_captcha()
            for i in range(1, 5):
                self.driver.execute_script(f"window.scrollTo(0, document.body.scrollHeight * {i/4});")
                time.sleep(1.2)

            # 获取本页链接 (完全对标 req.py 变量探测)
            page_results = self._extract_all_methods()
            print(f"  [+] 本页发现 {len(page_results)} 个原始条目")
            
            page_batch = []
            for it in page_results:
                raw_link = it.get("link")
                clean_url = self.clean_url(raw_link)
                
                if not clean_url:
                    continue
                
                if clean_url in all_links:
                    print(f"  [-] 跳过已存在商品: {clean_url}")
                    continue

                all_links.add(clean_url)
                # 【强制日志】只要进入这里，就一定会打印并执行详情抓取
                print(f"  [>] 正在执行详情抓取流程: {clean_url}")
                
                detail_results = self.scrape_detail(clean_url)
                if detail_results:
                    page_batch.extend(detail_results)
                else:
                    # 即使详情失败也记录基本信息，防止死循环
                    page_batch.append({
                        "category": "", "brand": "", "name": it.get("name", "未知"),
                        "color": "", "spec": "", "material": "", "price": "",
                        "moq": "", "wholesale_price": "", "link": clean_url, "supplier": ""
                    })
                
                if len(page_batch) >= 10:
                    yield page_batch
                    page_batch = []
                
                time.sleep(random.uniform(15, 25)) 
                if len(all_links) >= total_count + initial_count: break
            
            if page_batch: yield page_batch
            page += 1
            if page % 3 == 0:
                self.driver.get("https://www.1688.com")
                time.sleep(random.randint(10, 20))
        return list(all_links)

    def scrape_detail(self, url):
        """ 精准解析：完全同步自 req.py 的模型获取逻辑 """
        try:
            self.driver.get(url)
            time.sleep(random.uniform(5, 8))
            self.check_for_captcha()
            # 执行 JS 获取核心模型 (完全对标 req.py)
            model = self.driver.execute_script(
                "return (window.context && window.context.result && "
                "window.context.result.global && window.context.result.global.globalData "
                "&& window.context.result.global.globalData.model) || "
                "window.__INITIAL_DATA__ || window.iDetailData || window.iDetailConfig || null;"
            )
            if not model: return None

            def get_attr(name):
                try:
                    attrs = model.get("offerDetail", {}).get("featureAttributes", [])
                    for item in attrs:
                        if name in item.get("name", ""): return item.get("value", "")
                    attrs = model.get("detailData", {}).get("attributes", [])
                    for item in attrs:
                        if name in item.get("attributeName", ""): return item.get("value", "")
                except: pass
                return ""

            trade = model.get("tradeModel", {}) if isinstance(model, dict) else {}
            range_text = " / ".join([f"{r.get('beginAmount')}起 ¥{r.get('price') or r.get('discountPrice')}" for r in (trade.get("disPriceRanges") or trade.get("currentPrices") or [])])

            base_data = {
                "category": (model.get("offerDetail", {}).get("leafCategoryName", "") if isinstance(model, dict) else "") or self.driver.find_element(By.CSS_SELECTOR, "div[class*=breadcrumb] a:last-child").text.strip(),
                "brand": get_attr("品牌"),
                "name": (model.get("offerDetail", {}).get("subject", "") if isinstance(model, dict) else "") or self.driver.title.split('-')[0],
                "spec": get_attr("尺码") or get_attr("规格") or get_attr("型号"),
                "material": get_attr("材质") or get_attr("面料"),
                "price": "", "moq": trade.get("beginAmount", ""), "wholesale_price": range_text, "link": url,
                "supplier": (model.get("sellerModel", {}).get("companyName", "") if isinstance(model, dict) else ""),
            }

            variant_data_list = []
            try:
                # 方案 A: 优先使用 expand-view-list-wrapper 获取款式和价格
                wrappers = self.driver.find_elements(By.CLASS_NAME, "expand-view-list-wrapper")
                if wrappers:
                    items = wrappers[0].find_elements(By.CSS_SELECTOR, ".expand-view-list-item, [class*='list-item'], .sku-item")
                    for item_el in items:
                        try:
                            label = item_el.find_element(By.CLASS_NAME, "item-label").text.strip()
                            price = item_el.find_element(By.CLASS_NAME, "item-price-stock").text.strip()
                            if label: variant_data_list.append({"label": label, "price": re.sub(r'[^\d.]', '', price)})
                        except: continue
            except: pass

            if variant_data_list:
                results = []
                for vd in variant_data_list:
                    row = base_data.copy(); row["color"] = vd["label"]; row["price"] = vd["price"]; results.append(row)
                return results
            return [base_data]
        except: return None

    def _extract_all_methods(self):
        """ 强化版：全力探测 1688 列表页数据 (对标 req.py) """
        results = []
        # 1. 深度内存变量扫描
        scripts = [
            "return JSON.stringify(window.data || window.context?.result?.data || window.__INITIAL_DATA__)",
            "return JSON.stringify(window.context?.result?.global?.globalData?.data || null)"
        ]
        for s in scripts:
            try:
                res = self.driver.execute_script(s)
                if res and res != "null":
                    data = json.loads(res)
                    def find_list(obj):
                        if isinstance(obj, list) and len(obj) > 0 and isinstance(obj[0], dict) and any(k in obj[0] for k in ['offerId', 'title', 'subject']): return obj
                        if isinstance(obj, dict):
                            for k in obj:
                                f = find_list(obj[k])
                                if f: return f
                        return None
                    for o in (find_list(data) or []):
                        link = o.get('itemUrl', o.get('url', '')) or str(o.get('offerId', ''))
                        if link: results.append({"name": str(o.get('title', o.get('subject', ''))), "link": link})
                    if results: return results
            except: continue
        # 2. 暴力 DOM 选择器保底
        for s in [".sm-offer-item", ".offer-card-item", ".pc-search-offer-item", "[class*='offer-card']", ".offer-item"]:
            for el in self.driver.find_elements(By.CSS_SELECTOR, s):
                try:
                    a = el.find_element(By.TAG_NAME, "a")
                    link = a.get_attribute("href")
                    if link and "1688.com" in link: results.append({"name": el.text.split('\n')[0][:50], "link": link})
                except: continue
            if results: break
        return results

    def quit(self):
        try: self.driver.quit()
        except: pass