# copy《基础(必看)：鉴权字符串生成》鉴权字符串算法代码

def default_ak_sk():
    """使用固定的ak-sk方式，即永久性的ak-sk"""
    access_key = "ak"     # 固定 ak
    secret_key = "sk"     # 固定 sk
    download(access_key, secret_key)


def download(ak, sk, token=None):
    """从Bucket中下载文件到本地"""
    bucket_name = "bucketName"         # 访问的bucket名称
    object_key = "/aaa.png"             # 在请求url没有参数时，访问的key的名字就是path，注意以 '/'开头
    region = "bj.bcebos.com"            # bucket所在的区域，不同区域服务域名不同
    http_method = "GET"                 # 请求的方法类型 GET、PUT、HEAD、POST、DELETE
    host = f"{bucket_name}.{region}"    # 根据bucket和服务域名组装访问域名,有多种方式，这里只展示一种
    # 构造访问的header信息，可以根据需要进行额外添加，例如：content-type字段
    header = {
        "host": host,
        "x-bce-date": get_x_bce_date()
    }
    # 如果请求在url中有带参数，也要参与鉴权
    param = {}
    # 生成鉴权字符串
    auth_key = generate_bos_auth(object_key, ak, sk, http_method, header, param)
    # 构建完整的访问url
    request_url = f"http://{host}{object_key}?{AUTHORIZATION}={auth_key}"
    print(request_url)
    # 如果有token参数则添加到header中
    if token is not None:
        header['x-bce-security-token'] = token
    # GET请求
    resp = requests.get(url=request_url, headers=header)
    # 本地保存文件路径
    local_path = "/路径/文件名"
    save_local(resp, local_path)


if __name__ == '__main__':
    # 固定ak-sk方式下载文件
    default_ak_sk()

# copy《基础(必看)：鉴权字符串生成》鉴权字符串算法代码

def sts_ak_sk():
    """使用临时ak-sk-token方式"""
    access_key = "8702e0c7f08211ec8168058160a92b86"      # 临时申请的 sts ak
    secret_key = "315fddebae1f4d65b561a296c5fbc2f3"      # 临时申请的 sts sk
    # 临时sts token信息示例，请替换为自行申请的ak/sk/token
    token = "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"
    download(access_key, secret_key, token)


def download(ak, sk, token=None):
    """从Bucket中下载文件到本地"""
    bucket_name = "bucketName"         # 访问的bucket名称
    object_key = "/aaa.png"             # 在请求url没有参数时，访问的key的名字就是path，注意以 '/'开头
    region = "bj.bcebos.com"            # bucket所在的区域，不同区域服务域名不同
    http_method = "GET"                 # 请求的方法类型 GET、PUT、HEAD、POST、DELETE
    host = f"{bucket_name}.{region}"    # 根据bucket和服务域名组装访问域名,有多种方式，这里只展示一种
    # 构造访问的header信息，可以根据需要进行额外添加，例如：content-type字段
    header = {
        "host": host,
        "x-bce-date": get_x_bce_date()
    }
    # 如果请求在url中有带参数，也要参与鉴权
    param = {}
    # 生成鉴权字符串
    auth_key = generate_bos_auth(object_key, ak, sk, http_method, header, param)
    # 构建完整的访问url
    request_url = f"http://{host}{object_key}?{AUTHORIZATION}={auth_key}"
    # 如果有token参数则添加到header中
    if token is not None:
        header['x-bce-security-token'] = token
    # GET请求
    resp = requests.get(url=request_url, headers=header)
    # 本地保存文件路径
    local_path = "/路径/文件名"
    save_local(resp, local_path)


if __name__ == '__main__':
    # 临时ak-sk方式下载文件
    sts_ak_sk()