python post请求上传文件至minio

### 使用Python通过POST请求上传文件至MinIO

为了实现向MinIO服务器发送文件，可以利用`requests`库来构建并执行HTTP POST请求。下面展示了一个具体的例子，在这个实例中，假设已经配置好了MinIO服务，并知晓访问所需的URL、密钥等必要参数。

首先安装必要的依赖项：

pip install requests

接着按照如下方式编写代码片段用于上传操作[^1]:

import os
import requests
from requests.auth import HTTPBasicAuth


def upload_file_to_minio(file_path, bucket_name, object_name=None):
    """
    Uploads a file to the specified MinIO server.

    :param file_path: Path of local file.
    :param bucket_name: Name of destination bucket on MinIO.
    :param object_name: (Optional) Object name within MinIO. If not provided,
                        filename will be used as object name.
    """

    minio_url = "http://your-minio-server-url"
    access_key = 'YOUR-ACCESS-KEY'
    secret_key = 'YOUR-SECRET-KEY'

    if object_name is None:
        object_name = os.path.basename(file_path)

    url = f"{minio_url}/{bucket_name}/{object_name}"

    with open(file_path, 'rb') as data:
        response = requests.put(
            url=url,
            auth=HTTPBasicAuth(access_key, secret_key),
            data=data
        )

    if response.status_code == 200 or response.status_code == 204:
        print(f'Successfully uploaded {file_path} to {url}')
    else:
        raise Exception('Failed to upload', response.text)


if __name__ == '__main__':
    test_file = '/path/to/your/file.txt'  # Replace with your actual file path
    target_bucket = 'my-bucket-name'      # Your desired bucket name here
    try:
        upload_file_to_minio(test_file, target_bucket)
    except Exception as e:
        print(e)

需要注意的是上述代码中的`put()`方法被用来替代传统的`post()`方法来进行对象存储API调用；这是因为S3兼容的对象存储系统（如MinIO），通常遵循RESTful API设计模式，其中PUT动词更适合表示资源创建或更新动作。