三、交易与结算

## Python代码测试代码

[【附件】api请求测试.rar](/media/attachment/2026/07/api%E8%AF%B7%E6%B1%82%E6%B5%8B%E8%AF%95.rar)
```python
import hashlib
import json
import requests

def md5_hash(data):
    """计算 MD5 哈希值并转为大写"""
    return hashlib.md5(data.encode('utf-8')).hexdigest().upper()

def main():
    print("=" * 60)
    print("           联盟接口签名测试工具")
    print("=" * 60)
    
    # ===== 输入配置信息 =====
    print("\n【配置信息】")
    union_id = input("请输入联盟成员身份ID (union_id): ").strip()
    key = input("请输入厂商秘钥 KEY: ").strip()
    url = input("请输入完整接口地址: ").strip()
    
    try:
        union_id_value = int(union_id)
    except ValueError:
        union_id_value = union_id
    
    print(f"\n配置完成，开始测试（输入 q 退出）")
    
    while True:
        print("\n" + "-" * 60)
        
        # ===== 输入业务数据，一行搞定 =====
        json_str = input("\n请输入 data JSON（不含 union_id）: ").strip()
        
        if json_str.lower() == 'q':
            print("退出测试工具")
            break
        
        if not json_str:
            print("[错误] 输入为空")
            continue
        
        try:
            user_data = json.loads(json_str)
        except json.JSONDecodeError as e:
            print(f"[错误] JSON 格式不正确: {e}")
            continue
        
        # ===== 构建 data + 签名 =====
        data_with_union = dict(user_data)
        data_with_union['union_id'] = union_id_value
        
        data_json = json.dumps(data_with_union, ensure_ascii=False, separators=(',', ':'))
        sign = md5_hash(f"{data_json}key={key}")
        
        # ===== 请求体 =====
        result = {
            "sign": sign,
            "union_id": union_id_value,
            "data": data_with_union
        }
        
        print(f"\n签名: {sign}")
        print(f"请求体: {json.dumps(result, ensure_ascii=False)}")
        
        # ===== 发送请求 =====
        print(f"\n发送请求...")
        try:
            headers = {"Content-Type": "application/json"}
            response = requests.post(url, json=result, headers=headers, timeout=10)
            
            try:
                resp = response.json()
                print(f"响应: {json.dumps(resp, ensure_ascii=False, indent=2)}")
            except json.JSONDecodeError:
                print(f"响应: {response.text}")
            
        except requests.exceptions.ConnectionError:
            print(f"[错误] 无法连接服务器")
        except requests.exceptions.Timeout:
            print("[错误] 请求超时")
        except requests.RequestException as e:
            print(f"[错误] {e}")

if __name__ == "__main__":
    main()
```