本文介绍 POST 表单预签名的示例代码。
以下代码用于使用 POST 表单预签名向桶 bucket-test 添加对象 object-test。
import os
import tos
from tos.models2 import PostSignatureCondition
# 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"
try:
client = tos.TosClientV2(ak, sk, endpoint, region)
# 签名
out = client.pre_signed_post_signature(bucket=bucket_name, key=object_key,
# 可通过可选参数conditions添加其余信息
conditions=[PostSignatureCondition(key='x-tos-acl', value='private')])
print("Algorithm:", out.algorithm)
print("Date:", out.date)
print("Policy:", out.policy)
print("Signature:", out.signature)
print("Credential:", out.credential)
print("OriginPolicy:", out.origin_policy)
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 POST 表单预签名的详细信息，请参见基于浏览器上传的表单中包含签名。