### 步骤 1：设置项目目录
首先，创建项目目录并进入该目录：
mkdir payment_gateway
cd payment_gateway
创建子目录和文件：
mkdir payment
touch app.py config.py run.py requirements.txt
touch payment/__init__.py payment/routes.py payment/service.py
### 步骤 2：安装虚拟环境和依赖项
设置虚拟环境并激活它：
python -m venv venv
source venv/bin/activate # 对于Windows: venv\Scripts\activate
安装Flask和requests库：
pip install Flask requests
将依赖项保存到requirements.txt文件中：
pip freeze > requirements.txt
### 步骤 3：编写代码
#### app.py
from flask import Flask
from config import Config
from payment.routes import payment_bp
app = Flask(__name__)
app.config.from_object(Config)
app.register_blueprint(payment_bp, url_prefix='/payment')
if __name__ == '__main__':
app.run(debug=True)
#### config.py
`python
class Config:
SECRET_KEY = 'your_secret_key'
PAYMENT_GATEWAY_URL = '
https://fake-payment-gateway.com'
API_KEY = 'your_api_key'
#### payment/__init__.py
python
# Init file for the payment module
#### payment/routes.py
python
from flask import Blueprint, request, jsonify
from .service import PaymentService
payment_bpname('payment', __name__)
@payment_bp.route('/pay', methods=['POST'])
def pay():
data = request.json
amount = data.get('amount')
order_id = data.get('order_id')
if not amount or not order_id:
return jsonify({'error': 'Missing amount or order_id'}), 400
payment_url = PaymentService.initiate_payment(amount, order_id)
return jsonify({'payment_url': payment_url})
@payment_bp.route('/callback', methods=['POST'])
def callback():
data = request.json
payment_status = PaymentService.handle_callback(data)
return jsonify({'status': payment_status})
@payment_bp.route('/status/<order_id>', methods=['GET'])
def status(order_id):
payment_status = PaymentService.check_status(order_id)
return jsonify({'status': payment_status})
#### payment/service.py
python
import requests
from flask import current_app
class PaymentService:
@staticmethod
def initiate_payment(amount, order_id):
payment_gateway_url = current_app.config['PAYMENT_GATEWAY_URL']
api_key = current_app.config['API_KEY']
response = requests.post(payment_gateway_url, json={
'amount': amount,
'order_id': order_id,
'api_key': api_key
})
response_data = response.json()
return response_data['payment_url']
@staticmethod
def handle_callback(data):
payment_status = data.get('status')
order_id = data.get('order_id')
# Update your order status in the database
# In this example, we'll just print the status
print(f"Order {order_id} has been updated with status: {payment_status}")
return payment_status
@staticmethod
def check_status(order_id):
# Here you would check the payment status from your database
# For this example, we will just return a fake status
return 'paid'
#### run.py
python
fr == ' amain_name__ == '__main__':
app.run()
### 步骤 4：运行应用程序
在虚拟环境中，运行Flask应用程序：
sh
python run.py
现在你的支付接口应该可以在http://127.0.0.1:5000上访问。
### 步骤 5：创建ZIP文件
在项目根目录中运行以下命令来创建ZIP文件：
sh
zip -r payment_gateway.zip *
### 完整项目结构
payment_gateway/
├── venv/ # 虚拟环境目录
├── app.py
├── config.initnt/
│ ├── __init__.py
│ ├── routes.py
│ ├── service.py
├── requirements.txt
├── run.py
├── payment_gateway.zip # 生成的ZIP文件
- app.py：设置Flask应用程序，加载配置文件，注册支付蓝图，并启动应用。
- config.py：包含应用程序配置，如密钥和init
- payment/__init__.py：支付模块的初始化文件。
- payment/routes.py：定义支付相关的API路由和处理函数。
- payment/service.py：包含支付服务逻辑，如发起支付请求、处理回调和查询支付状态。
- run.py`：用于运行Flask应用程序。