Access to XMLHttpRequest Cros 跨域报错的，参数导致问题

0、前言

需求：实现python封装将本地图片存储至minio中的POST接口和获取图片下载外链的get接口，实现前端调用实现图片上传和下载

1、后端接口

# 上传图片接口
@app.route("/upload_image", methods=["POST"])
def upload_image():
    data = request.json
    bucket_name = data.get("bucket_name")
    directory_path = data.get("directory_path")
    image_path = data.get("image_path")

    if not all([bucket_name, directory_path, image_path]):
        return jsonify({"status": "error", "message": "缺少必要的参数"})

    result = bucket.upload_image(bucket_name, directory_path, image_path)
    return jsonify(result)

# 获取图片外链接口
@app.route("/get_image_url", methods=["GET"])
def get_image_url():
    bucket_name = request.args.get("bucket_name")
    image_path = request.args.get("image_path")

    if not all([bucket_name, image_path]):
        return jsonify({"status": "error", "message": "缺少必要的参数"})

    result = bucket.get_image_url(bucket_name, image_path)
    return jsonify(result)

2、前端接口封装<