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from obs import ObsClient
import os
import traceback
import base64

# 推荐通过环境变量获取AKSK，这里也可以使用其他外部引入方式传入，如果使用硬编码可能会存在泄露风险。
# 您可以登录访问管理控制台获取访问密钥AK/SK，获取方式请参见https://support.huaweicloud.com/usermanual-ca/ca_01_0003.html。
ak = os.getenv("AccessKeyID")
sk = os.getenv("SecretAccessKey")
# 【可选】如果使用临时AKSK和SecurityToken访问OBS，则同样推荐通过环境变量获取
security_token = os.getenv("SecurityToken")
#  server填写Bucket对应的Endpoint, 这里以华北-北京四为例，其他地区请按实际情况填写。
server = "https://obs.cn-north-4.myhuaweicloud.com"
# 创建obsClient实例
# 如果使用临时AKSK和SecurityToken访问OBS，需要在创建实例时通过security_token参数指定securityToken值
obsClient = ObsClient(access_key_id=ak, secret_access_key=sk, server=server)
try:
    # 生成创建桶的带授权信息的URL
    res1 = obsClient.createSignedUrl(method='PUT', bucketName='bucketname', expires=3600)
    print('signedUrl:', res1.signedUrl)
    print('actualSignedRequestHeaders:', res1.actualSignedRequestHeaders)

    # 生成上传对象的带授权信息的URL
    res2 = obsClient.createSignedUrl(method='PUT', bucketName='bucketname', objectKey='objectkey', expires=3600,
                                     headers={'Content-Type': 'text/plain'})
    print('signedUrl:', res2.signedUrl)
    print('actualSignedRequestHeaders:', res2.actualSignedRequestHeaders)

    # 生成设置对象ACL的带授权信息的URL
    res3 = obsClient.createSignedUrl(method='PUT', bucketName='bucketname', objectKey='objectkey', specialParam='acl',
                                     expires=3600, headers={'x-obs-acl': 'private'})
    print('signedUrl:', res3.signedUrl)
    print('actualSignedRequestHeaders:', res3.actualSignedRequestHeaders)

    # 生成下载对象的带授权信息的URL
    res4 = obsClient.createSignedUrl(method='GET', bucketName='bucketname', objectKey='objectkey', expires=3600)
    print('signedUrl:', res4.signedUrl)
    print('actualSignedRequestHeaders:', res4.actualSignedRequestHeaders)

    # 生成删除对象的带授权信息的URL
    res5 = obsClient.createSignedUrl(method='DELETE', bucketName='bucketname', objectKey='objectkey', expires=3600)
    print('signedUrl:', res5.signedUrl)
    print('actualSignedRequestHeaders:', res5.actualSignedRequestHeaders)

    # 生成删除桶的带授权信息的URL
    res6 = obsClient.createSignedUrl(method='DELETE', bucketName='bucketname', expires=3600)
    print('signedUrl:', res6.signedUrl)
    print('actualSignedRequestHeaders:', res6.actualSignedRequestHeaders)

    # 生成图片持久化处理的带授权信息的URL
    # 原对象所在的桶名
    bucketName = 'originBucketName'; 
    # 处理前的原对象名
    objectKey = 'test.png';

    # 处理后的对象名
    targetObjectName ="save.png"
    # 处理后保存的桶名, 可选参数
    targetBucketName ="saveBucketName"
    queryParams={}
    queryParams["x-image-process"]="image/resize,w_100"
    queryParams["x-image-save-object"]=base64.b64encode(targetObjectName .encode("utf-8")).decode()
     # 可选参数
    queryParams["x-image-save-bucket"]=base64.b64encode(targetBucketName .encode("utf-8")).decode()

    res7 = obsClient.createSignedUrl(method='GET', bucketName=bucketName, objectKey=objectKey, queryParams=queryParams, expires=3600)
    print('signedUrl:', res7.signedUrl)
    print('actualSignedRequestHeaders:', res7.actualSignedRequestHeaders)
except:
    print(traceback.format_exc())