flask+swagger

由于写完flask接口后,需要向前端提供swagger接口文档,因此需要自动生成swagger文档。

1. 安装flask-restplus

采用如下命令安装flask-restplus

pip install flask-restplus==0.13.0

安装完成后导入包时报错,这是因为新版的werkzeug中该模块导入发生了变化,需要手动修改下

cannot import name 'cached_property'

/usr/local/lib/python3.7/site-packages/werkzeug/__init__.py 文件中,添加:

from werkzeug.utils import cached_property

2. 使用教程

from flask import Flask
from flask_restplus import Resource, Api, fields
import json
from flask_cors import CORS


app = Flask(__name__)
CORS(app, supports_credentials=True)

# swagger文档标题
api = Api(app, version='1.0', title='???',
          description='???')
app.config.update(RESTFUL_JSON=dict(ensure_ascii=False))

# 配置不同模块的命名空间
edi_risk = api.namespace('aRisk', path='/')

# 参数解析
parser = api.parser()

# 配置post方法需要传递的接口输入参数
a_input = api.model('a_input', {
    'input_text': fields.String(required=False, description='待查询的文本')
})
# 配置返回参数
a_risk_result = api.model('a_risk_result', {
    'risk': fields.Float(description='综合风险'),
})

# 继承参数,子
child = api.model('child_risk_source', {
     'is_risk_source': fields.Boolean(
         required=True, description='', default=False
     ),
     'risk_source_info': fields.String(
         required=True, description='',
         default='预警'
     )
})
# 继承参数,父
parent = api.model('parent', {'risk_source': fields.Nested(child)})

@a_risk.expect(parser)
class aRisk(Resource):
    # 配置输入参数说明
    @a_risk.doc(body=a_input)
    # 配置返回参数说明
    @a_risk.marshal_with(a_risk_result)
    def get(self, request):
        """
        swagger测试用例-1
        """
        results = {'SuccessFlag': True, 'Data': '输入文本成功!'}
        receive_params = request.get_data(as_text=True)
        receive_params = receive_params.replace("\\\\", "\\")
        post_value = json.loads(receive_params,
                                encoding="utf-8")
        input_text = post_value['input_text']
        return results, 200

    @a_risk.doc(body=a_input)
    @a_risk.marshal_with(a_risk_result)
    def post(self, request):
        """
        swagger测试用例-2
        """
        results = {'SuccessFlag': True, 'Data': '输入文本成功!'}
        receive_params = request.get_data(as_text=True)
        receive_params = receive_params.replace("\\\\", "\\")
        post_value = json.loads(receive_params,
                                encoding="utf-8")
        input_text = post_value['input_text']
        return results, 200

# 配置各命名空间下的接口
a_risk.add_resource(aRisk, '/aRisk/')


if __name__ == '__main__':
    app.run(host="0.0.0.0", port="8000", debug=True)

3. WSGI启动

启动时提示:

WARNING: This is a development server. Do not use it in a production deployment.
Use a production WSGI server instead.

部署时应当采用WSGI启动,添加如下代码

from gevent import pywsgi

def query_api_wsgi():
    """
    部署的WSGI启动模式
    """
    server = pywsgi.WSGIServer(('0.0.0.0', 5000), app)
    server.serve_forever()

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