tencent cloud

get_presigned_url(Bucket, Key, Method, Expired=300, Params={}, Headers={})

# -*- coding=utf-8
from qcloud_cos import CosConfig
from qcloud_cos import CosS3Client
import sys
import os
import logging
import requests

# In most cases, set the log level to INFO. If you need to debug, you can set it to DEBUG and the SDK will print information about the communication with the server.
logging.basicConfig(level=logging.INFO, stream=sys.stdout)

# 1. Set user attributes such as secret_id, secret_key, and region. Appid has been removed from CosConfig and thus needs to be specified in Bucket, which is formatted as BucketName-Appid.
secret_id = os.environ['COS_SECRET_ID']     #  User `SecretId`. We recommend you use a sub-account key and follow the principle of least privilege to reduce risks. For information about how to obtain a sub-account key, visit https://www.tencentcloud.com/document/product/598/32675.
secret_key = os.environ['COS_SECRET_KEY']   # User `SecretKey`. We recommend you use a sub-account key and follow the principle of least privilege to reduce risks. For information about how to obtain a sub-account key, visit https://www.tencentcloud.com/document/product/598/32675.
region = 'ap-beijing'      # Replace it with the actual region, which can be viewed in the console at https://console.tencentcloud.com/cos5/bucket.
                           # For the list of regions supported by COS, visit https://www.tencentcloud.com/document/product/436/6224.
token = None               # Token is required for temporary keys but not permanent keys. For more information about how to generate and use a temporary key, visit https://www.tencentcloud.com/document/product/436/14048.
scheme = 'https'           # Specify whether to use HTTP or HTTPS protocol to access COS. This field is optional and is `https` by default.

config = CosConfig(Region=region, SecretId=secret_id, SecretKey=secret_key, Token=token, Scheme=scheme)
client = CosS3Client(config)

# Generate an upload URL without specifying request headers and parameters
url = client.get_presigned_url(
    Method='PUT',
    Bucket='examplebucket-1250000000',
    Key='exampleobject',
    Expired=120  # Expire in 120 seconds. Specify the expiration time as needed.
)
print(url)

# Generate an upload URL with a specified storage class and upload speed
url = client.get_presigned_url(
    Method='PUT',
    Bucket='examplebucket-1250000000',
    Key='exampleobject',
    Headers={
        'x-cos-storage-class':'STANDARD_IA', 
        'x-cos-traffic-limit':'819200' # The pre-signed URL itself does not include request headers, but request headers are signed in the signature. Therefore, the URL must carry request headers and their values specified here.
    },
    Expired=300  # Expire in 300 seconds. Specify the expiration time as needed.
)
print(url)

# Generate an upload URL that can only be used to upload specified file content
url = client.get_presigned_url(
    Method='PUT',
    Bucket='examplebucket-1250000000',
    Key='exampleobject',
    Headers={'Content-MD5':'string'}, # When the URL is used to upload an object, an MD5 request header must be carried, and the value of the request header must be the value specified here, thus limiting the content of the file.
    Expired=300  # Expire in 300 seconds. Specify the expiration time as needed.
)
print(url)

# Generate an upload URL that can only be used for ACL upload
url = client.get_presigned_url(
    Method='PUT',
    Bucket='examplebucket-1250000000',
    Key='exampleobject',
    Params={'acl':''}, # If a request parameter is specified, it will be carried in the URL and included in the signature, and its value cannot be modified by users.
    Expired=120  # Expire in 120 seconds. Specify the expiration time as needed.
)
print(url)

# Generate an upload URL, where the request domain name is not signed and users need to modify the request domain name before usage
url = client.get_presigned_url(
    Method='PUT',
    Bucket='examplebucket-1250000000',
    Key='exampleobject',
    SignHost=False, # Exclude the request domain name from the signature. This setting will bring certain security risks. Use it only when you need to allow users to modify the request domain name after signing.
    Expired=120  # Expire in 120 seconds. Specify the expiration time as needed.
)
print(url)

# Use an upload URL
response = requests.put(url=url, data=b'123')
print(response)