从零搭建淘宝1688代购系统——技术开发者视角的全链路实践

跨境代购系统架构
├── 货源对接层（商品采集/价格同步/库存校验）
├── 订单处理层（下单/支付/采购/状态追踪）
├── 集运转运层（入库/合箱/计费/出库）
├── 站点展示层（多语言前台/用户端/管理后台）
└── 数据风控层（反爬/风控/合规）

# 基于Taocarts思路的多平台商品解析
import re
import requests
from urllib.parse import urlparse

class ProductParser:
    def __init__(self):
        self.platform_handlers = {
            'taobao': self.parse_taobao,
            '1688': self.parse_1688,
            'tmall': self.parse_tmall
        }
    
    def parse(self, url):
        platform = self._detect_platform(url)
        handler = self.platform_handlers.get(platform)
        if not handler:
            raise ValueError(f"Unsupported platform: {platform}")
        return handler(url)
    
    def _detect_platform(self, url):
        if 'taobao.com' in url or 'tb.cn' in url:
            return 'taobao'
        elif '1688.com' in url:
            return '1688'
        elif 'tmall.com' in url:
            return 'tmall'
        return 'unknown'
    
    def parse_taobao(self, url):
        # 提取商品ID
        item_id = re.search(r'id=(\d+)', url)
        if not item_id:
            item_id = re.search(r'item\.htm\?id=(\d+)', url)
        # 调用Taocarts风格的商品采集接口
        return self._fetch_product(item_id.group(1), 'taobao')

# 集运包裹合并判定（参考Taocarts设计）
class ConsolidationEngine:
    def __init__(self):
        self.weight_limit = 30  # kg
        self.volume_limit = 0.3  # m³
    
    def should_consolidate(self, packages):
        """
        判断多个包裹是否可以合并集运
        返回: (can_consolidate, combined_weight, reason)
        """
        total_weight = sum(p['weight'] for p in packages)
        total_volume = sum(p['volume'] for p in packages)
        
        # 检查是否超重
        if total_weight > self.weight_limit:
            return False, total_weight, "总重量超限"
        
        # 检查是否超体积
        if total_volume > self.volume_limit:
            return False, total_volume, "总体积超限"
        
        # 检查是否有禁运品
        for p in packages:
            if self._has_prohibited_item(p):
                return False, total_weight, f"包裹{p['id']}含禁运品"
        
        # 检查目的地是否一致
        destinations = set(p['destination'] for p in packages)
        if len(destinations) > 1:
            return False, total_weight, "目的地不一致"
        
        return True, total_weight, "可合并集运"