Django+Heroku调用S3 PutObject时SignatureDoesNotMatch错误求助

开发的Django应用部署在Heroku平台，已在配置文件中指定Access Key ID等相关环境变量（配置代码如下）。当前使用django-storages（1.12.3版本）和boto3（1.26.31版本）调用AWS S3的PutObject接口时，持续出现「SignatureDoesNotMatch」错误，提示请求签名不匹配。

尝试过多种权限配置的IAM用户（含S3全权限、全局账号Access Key），核对过Access Key的正确性，也尝试通过Django后台管理页面上传文件，均出现该错误，网站返回内部服务器错误。请求协助排查并解决此问题。

配置代码 #

# Amazon S3 Settings
AWS_ACCESS_KEY_ID= config("AWS_ACCESS_KEY_ID")
AWS_SECRET_ACCESS_KEY_ID= config("AWS_SECRET_ACCESS_KEY_ID")
AWS_STORAGE_BUCKET_NAME= config("AWS_STORAGE_BUCKET_NAME")
AWS_S3_CUSTOM_DOMAIN=f"{AWS_STORAGE_BUCKET_NAME}.s3.us-west-1.amazonaws.com" # this is the default storage class to generate url for storage 
AWS_DEFAULT_ACL="public-read"
AWS_S3_OBJECT_PARAMETERS = {
    "CacheControl": "max-age=86400"
}
AWS_LOCATION= "static"  #A path prefix that will be prepended to all uploads
AWS_S3_REGION_NAME = "eu-west-1"
AWS_QUERYSTRING_AUTH=False
AWS_HEADERS={
    "Access-Control-Allow-Origin":"*",
}
DEFAULT_FILE_STORAGE= "storages.backends.s3boto3.S3Boto3Storage"
STATICFILES_STORAGE= "storages.backends.s3boto3.S3StaticStorage"
STATIC_URL= f"https://{AWS_S3_CUSTOM_DOMAIN}/static/"
MEDIA_URL= f"https://{AWS_S3_CUSTOM_DOMAIN}/media/"

# Heroku Logging
DEBUG_PROPAGATE_EXCEPTIONS = True
# Assets Management
ASSETS_ROOT = os.getenv('ASSETS_ROOT', f"https://{AWS_S3_CUSTOM_DOMAIN}/static/assets")  

相关依赖版本 #

django-storages==1.12.3    
boto3==1.26.31  

错误信息 #

botocore.exceptions.ClientError: An error occurred (SignatureDoesNotMatch) when calling the PutObject operation: The request signature we calculated does not match the signature you provided. Check your key and signing method.

网站返回内容 #

Internal Server Error

The server encountered an unexpected internal server error

(generated by the waitress)

内容的提问来源于stack exchange，提问作者Julia Julchen