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# -*- coding:utf-8 -*-
from obs import ObsClient,CompleteMultipartUploadRequest, CompletePart
import os
import traceback
# 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:
    #桶名
    bucketName = "examplebucket"
    #对象名
    objectkey = "objectname"
    # 对象的MIME类型
    contentType = 'text/plain'
    # 初始化分段上传任务
    resp = obsClient.initiateMultipartUpload(bucketName, objectkey,
                                             contentType=contentType)
    #获取初始化上传任务的uploadId
    uploadId = resp.body["uploadId"]
    #上传段大小
    partSize = 512 * 1024 * 1024
    #段号
    partNum = 1
    # 指明object字段是否代表文件路径，默认为False、此处为True
    isFile = True
    #本地要上传的对象文件
    filepath = r"D:	mp\file.txt"
    contentLength = os.path.getsize(filepath)
    #源文件中某一分段的起始偏移大小。
    offset = 0
    etags = {}

    while offset < contentLength:
        partSize = min(partSize, (contentLength - offset));
        # 用于上传段
        resp1 = obsClient.uploadPart(bucketName, objectkey, partNum, uploadId, filepath, isFile, partSize, offset)
        etags[partNum] = resp1.body.etag
        offset = offset + partSize
        partNum = partNum + 1

    completes = []
    for i in range(1, partNum):
        completes.append(CompletePart(i, etags[i]))
    # 用于合并段
    completeMultipartUploadRequest = CompleteMultipartUploadRequest(parts = completes)
    resp = obsClient.completeMultipartUpload(bucketName, objectkey, uploadId, completeMultipartUploadRequest)
    # 返回码为2xx时，接口调用成功，否则接口调用失败
    if resp.status < 300:
        print('Upload Part Succeeded')
        print('requestId:', resp.requestId)
        print('etag:', resp.body.etag)
    else:
        print('Upload Part Failed')
        print('requestId:', resp.requestId)
        print('errorCode:', resp.errorCode)
        print('errorMessage:', resp.errorMessage)
except:
    print('multPartsUpload Failed')
    print(traceback.format_exc())