Creating a Signed URL (SDK for Python)

from obs import ObsClient
import os
import traceback
import base64

# Obtain an AK and SK pair using environment variables or import the AK and SK pair in other ways. Using hard coding may result in leakage.
# Obtain an AK and SK pair on the management console. For details, see https://support.huaweicloud.com/intl/en-us/usermanual-ca/ca_01_0003.html.
ak = os.getenv("AccessKeyID")
sk = os.getenv("SecretAccessKey")
# (Optional) If you use a temporary AK and SK pair and a security token to access OBS, obtain them from environment variables.
security_token = os.getenv("SecurityToken")
# Set server to the endpoint corresponding to the bucket. Here uses CN-Hong Kong as an example. Replace it with the one in use.
server = "https://obs.ap-southeast-1.myhuaweicloud.com" 

# Create an obsClient instance.
# If you use a temporary AK and SK pair and a security token to access OBS, you must specify security_token when creating an instance.
obsClient = ObsClient(access_key_id=ak, secret_access_key=sk, server=server)
try:
    # Create a signed URL for creating a bucket.
    res1 = obsClient.createSignedUrl(method='PUT', bucketName='bucketname', expires=3600)
    print('signedUrl:', res1.signedUrl)
    print('actualSignedRequestHeaders:', res1.actualSignedRequestHeaders)

    # Create a signed URL for uploading an object.
    res2 = obsClient.createSignedUrl(method='PUT', bucketName='bucketname', objectKey='objectkey', expires=3600,
                                     headers={'Content-Type': 'text/plain'})
    print('signedUrl:', res2.signedUrl)
    print('actualSignedRequestHeaders:', res2.actualSignedRequestHeaders)

    # Create a signed URL for setting an object ACL.
    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)

    # Create a signed URL for downloading an object.
    res4 = obsClient.createSignedUrl(method='GET', bucketName='bucketname', objectKey='objectkey', expires=3600)
    print('signedUrl:', res4.signedUrl)
    print('actualSignedRequestHeaders:', res4.actualSignedRequestHeaders)

    # Create a signed URL for deleting an object.
    res5 = obsClient.createSignedUrl(method='DELETE', bucketName='bucketname', objectKey='objectkey', expires=3600)
    print('signedUrl:', res5.signedUrl)
    print('actualSignedRequestHeaders:', res5.actualSignedRequestHeaders)

    # Create a signed URL for deleting a bucket.
    res6 = obsClient.createSignedUrl(method='DELETE', bucketName='bucketname', expires=3600)
    print('signedUrl:', res6.signedUrl)
    print('actualSignedRequestHeaders:', res6.actualSignedRequestHeaders)

    # Create a signed URL for image persistency.
    # Name of the bucket that stores the original object
    bucketName = 'originBucketName'; 
    # Original object name
    objectKey = 'test.png';

    # Name of the object after processing
    targetObjectName ="save.png"
    # (Optional) Name of the bucket that stores the new object
    targetBucketName ="saveBucketName"
    queryParams={}
    queryParams["x-image-process"]="image/resize,w_100"
    queryParams["x-image-save-object"]=base64.b64encode(targetObjectName .encode("utf-8")).decode()
    # Optional parameter
    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())