adx ssp adx

### 广告技术中的ADX和SSP

#### ADX (广告交易平台)

ADX 是一种在线服务，作为中介连接多个买家（DSPs）和卖家（SSPs）。通过这种平台，媒体的广告库存能够被实时竞拍。ADX的核心功能在于它能高效地匹配广告位的需求方与供给方，在几毫秒内完成整个竞价流程，并最终决定由哪家DSP赢得该次展示机会[^1]。

class AdExchange:
    def __init__(self):
        self.dsp_bidders = []
    
    def add_dsp(self, dsp):
        """Add a Demand-Side Platform to the exchange."""
        self.dsp_bidders.append(dsp)
        
    def auction_ad_space(self, ad_request):
        """Auction an available advertisement space among connected DSPs."""
        highest_bid = None
        winning_dsp = None
        
        for bidder in self.dsp_bidders:
            bid_amount = bidder.evaluate_and_bid(ad_request)
            
            if not highest_bid or bid_amount > highest_bid:
                highest_bid = bid_amount
                winning_dsp = bidder
                
        return winning_dsp.place_ad()

#### SSP (供应方平台)

SSP允许发布商管理和销售其网站上的广告空间给最高出价者。这不仅限于单个出版物；相反，它可以代表许多不同的站点处理大量的广告请求。SSP还提供了诸如自动优化、频率控制等功能来帮助提高收益效率。当接收到一个页面加载事件时，SSP会向多个ADX发送信号以启动拍卖过程[^2]。

class SupplySidePlatform:
    def __init__(self, publisher_inventory):
        self.publisher_inventory = publisher_inventory
    
    def receive_page_load_event(self, page_view_info):
        """Receive and process a new page load event from publishers' sites."""
        ad_requests = self._generate_ad_requests(page_view_info)
        
        for request in ad_requests:
            selected_ad = self.send_to_exchanges(request)
            yield selected_ad
            
    def send_to_exchanges(self, ad_request):
        """Send generated requests to multiple exchanges for bidding."""
        best_offer = None
        
        for exchange in EXCHANGES:
            offer = exchange.auction_ad_space(ad_request)
            
            if not best_offer or offer['bid'] > best_offer['bid']:
                best_offer = offer
                
        return best_offer