TosClient 在向服务端发起请求时,默认会对请求 header 里包含签名。SDK 也支持构造带签名的 URL,您可直接用该 URL 发起 HTTP 请求,也可以将该 URL 共享给第三方实现访问授权。下面给出使用预签名的 URL 上传对象,和使用预签名的URL下载示例,其他接口的使用方法以此类推。
以下代码用于预签名的 URL 向桶 bucket-test
中上传对象 object-test
。
import requests import os import tos # 从环境变量获取 AK 和 SK 信息。 ak = os.getenv('TOS_ACCESS_KEY') sk = os.getenv('TOS_SECRET_KEY') endpoint = "your endpoint" region = "your region" bucket_name = "bucket-test" object_key = "object-test" content = b'test pre_signed_url get_object' try: # 创建 TosClientV2 对象,对桶和对象的操作都通过 TosClientV2 实现 client = tos.TosClientV2(ak, sk, endpoint, region) # 生成上传文件的签名url,有效时间为3600s out = client.pre_signed_url(tos.HttpMethodType.Http_Method_Put, bucket=bucket_name, key=object_key, expires=3600) print('签名URL的地址为', out.signed_url) # 使用预签名上传对象,以requests为例说明。 out = requests.put(out.signed_url, content) out.close() # 下载对象 get_out = client.get_object(bucket_name, object_key) except tos.exceptions.TosClientError as e: # 操作失败,捕获客户端异常,一般情况为非法请求参数或网络异常 print('fail with client error, message:{}, cause: {}'.format(e.message, e.cause)) except tos.exceptions.TosServerError as e: # 操作失败,捕获服务端异常,可从返回信息中获取详细错误信息 print('fail with server error, code: {}'.format(e.code)) # request id 可定位具体问题,强烈建议日志中保存 print('error with request id: {}'.format(e.request_id)) print('error with message: {}'.format(e.message)) print('error with http code: {}'.format(e.status_code)) print('error with ec: {}'.format(e.ec)) print('error with request url: {}'.format(e.request_url)) except Exception as e: print('fail with unknown error: {}'.format(e))
以下代码用于预签名的 URL 下载桶 bucket-test
中对象 object-test
。
import requests import os import tos from tos import HttpMethodType # 从环境变量获取 AK 和 SK 信息。 ak = os.getenv('TOS_ACCESS_KEY') sk = os.getenv('TOS_SECRET_KEY') endpoint = "your endpoint" region = "your region" bucket_name = "bucket-test" object_key = "object-test" content = b'test pre_signed_url get_object' try: # 创建 TosClientV2 对象,对桶和对象的操作都通过 TosClientV2 实现 client = tos.TosClientV2(ak, sk, endpoint, region) # 生成带签名的 url pre_signed_url_output = client.pre_signed_url(HttpMethodType.Http_Method_Get, bucket_name, object_key) # 使用预签名的url下载对象,以requests为例 out = requests.get(pre_signed_url_output.signed_url) except tos.exceptions.TosClientError as e: # 操作失败,捕获客户端异常,一般情况为非法请求参数或网络异常 print('fail with client error, message:{}, cause: {}'.format(e.message, e.cause)) except tos.exceptions.TosServerError as e: # 操作失败,捕获服务端异常,可从返回信息中获取详细错误信息 print('fail with server error, code: {}'.format(e.code)) # request id 可定位具体问题,强烈建议日志中保存 print('error with request id: {}'.format(e.request_id)) print('error with message: {}'.format(e.message)) print('error with http code: {}'.format(e.status_code)) print('error with ec: {}'.format(e.ec)) print('error with request url: {}'.format(e.request_url)) except Exception as e: print('fail with unknown error: {}'.format(e))
import requests import os import tos # 从环境变量获取 AK 和 SK 信息。 ak = os.getenv('TOS_ACCESS_KEY') sk = os.getenv('TOS_SECRET_KEY') endpoint = "your endpoint" region = "your region" bucket_name = "bucket-test" object_key = "object-test" content = b'test pre_signed_url delete_object' try: # 创建 TosClientV2 对象,对桶和对象的操作都通过 TosClientV2 实现 client = tos.TosClientV2(ak, sk, endpoint, region) client.create_bucket(bucket_name) # 生成删除文件的签名url,有效时间为3600s out = client.pre_signed_url(tos.HttpMethodType.Http_Method_Delete, bucket=bucket_name, key=object_key, expires=3600) print('签名URL的地址为', out.signed_url) # 使用预签名删除对象,以requests为例说明。 out = requests.delete(out.signed_url, content) out.close() except tos.exceptions.TosClientError as e: # 操作失败,捕获客户端异常,一般情况为非法请求参数或网络异常 print('fail with client error, message:{}, cause: {}'.format(e.message, e.cause)) except tos.exceptions.TosServerError as e: # 操作失败,捕获服务端异常,可从返回信息中获取详细错误信息 print('fail with server error, code: {}'.format(e.code)) # request id 可定位具体问题,强烈建议日志中保存 print('error with request id: {}'.format(e.request_id)) print('error with message: {}'.format(e.message)) print('error with http code: {}'.format(e.status_code)) print('error with ec: {}'.format(e.ec)) print('error with request url: {}'.format(e.request_url)) except Exception as e: print('fail with unknown error: {}'.format(e))
关于 URL 包含签名的详细信息,请参见 URL 中包含签名。