cdn如何加速端游

# 假设我们有一个游戏资源加载函数
def load_game_resource(resource_url):
    # 尝试从CDN节点获取资源
    cdn_url = get_cdn_url(resource_url)
    try:
        resource_data = fetch_from_cdn(cdn_url)
    except CDNError:
        # 如果CDN节点获取失败，从源站获取
        resource_data = fetch_from_origin(resource_url)
    
    return resource_data

# 获取CDN节点URL的函数
def get_cdn_url(origin_url):
    # 这里可以调用CDN服务的API获取最近的节点URL
    cdn_node = cdn_service.get_nearest_node(origin_url)
    return f"{cdn_node}/{origin_url}"

# 从CDN节点获取数据的函数
def fetch_from_cdn(cdn_url):
    # 实际实现中可以使用HTTP请求库（如requests）进行数据获取
    response = http.get(cdn_url)
    if response.status_code == 200:
        return response.content
    else:
        raise CDNError("Failed to fetch from CDN")

# 从源站获取数据的函数
def fetch_from_origin(origin_url):
    # 实际实现中同样可以使用HTTP请求库进行数据获取
    response = http.get(origin_url)
    if response.status_code == 200:
        return response.content
    else:
        raise OriginError("Failed to fetch from origin")