如何为方法返回 json 和 string 创建响应对象

如何解决如何为方法返回 json 和 string 创建响应对象

如下所示，我有两个具有以下路由的 Web 服务

@app.route("/",methods=['GET','POST'] )
@app.route("/getDistanceFromOriginToDestination/<string:originAndDestinationGPSCoords>",methods=['GET'] )

下面发布的 .yaml 文件包含使用 OpenAPi 和 Swagger 生成 api 文档所需的代码。

方法 rootTest 返回如下所示的 json 响应，而方法 getDistanceFromOriginToDestination 以字符串形式返回距离 如何为下面提到的两种方法创建响应对象

yaml：

        openapi: '3.0.2'
info:
  title: &apiTitle "Distance computation between two GPS coordinates micro-service API."
  description: "This micro-service accepts or receives four comma separated GPS coordinates in the 
following order,startLongitude,startLatitude,endLongitude,endLatitude in a URL. The URL is fetched and consumed,then it returns back a 
response in a form of json file. The json file is to be fetched for the distance which represents the 
distance between 
               the provided GPS coordinates"
  version: '1.0'
  termsOfService: "http://127.0.0.1:5000/getDistance/terms"
  contact:
    name: " "
    url: "http://127.0.0.1:5000"
    email: "[e-mail]"
  license:
    name: "CC Attribution-ShareAlike 4.0 (CC BY-SA 4.0)"
    url: "https://openweathermap.org/price"
servers:
  - url: http://127.0.0.1:5000/
    description: Local host for API service
paths:
  /:
    get:
      tags:
        -  get distance tag
      summary: get the distance between 8.681436,49.414554,8.681561,49.414747
      description: to display data in json formate
      operationId:  get distance between default coordinates
      responses:
        "200":
          description: Successful response  
           
        '400':
          description: Invalid request
          content:
            application/json:
              schema:
                type: object
                properties:   
                  message:
                    type: string
        '401':
          description: Authorization information is missing or invalid.
        '404':
          description: A user with the specified ID was not found.
        '5XX':
          description: Unexpected error.

  /getDistanceFromOriginToDestination/{originAndDestinationGPSCoords}:
    get:
      tags: 
        - get distance tag
        - get distance in kilometers tag
      summary: get the distance between two GPS coordinates in Kilometers.
      description: originAndDestinationGPSCoords represents the start and end GPS coordinates in the 
following order longitude and latitude respectively. Passing the start and end
        GPS cootdinates in the URL will result in invoking and communicating with OpenRouteService. 
The latter service will send a response in a form of json
        file.The JSON file will be fetched for the distance. The distance fetched,is the distance 
between the GPS coordinates entered and it is in meters,however
        they are displayed to the users in Kilometers.
      operationId:  com.get.distance.from.gps.coordinates
      parameters:
        - $ref: '#/components/parameters/originAndDestinationGPSCoords'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/200_v2'
        '400':
          description: Bad request. User ID must be an integer and larger than 0.
        '401':
          description: Authorization information is missing or invalid.
        '404':
          description: A user with the specified ID was not found.
        '5XX':
          description: Unexpected error.

components:

  parameters:
    originAndDestinationGPSCoords:
      name: originAndDestinationGPSCoords
      in: path
      description: Start and end GPS coordinates as comma separated values in terms of longitude and 

latitude respectively. For example 
            12.497366,41.922782,-3.606997572,40.47416477
      required: true
      schema:
        type: number
        format: float
      allowEmptyValue: false
  schemas:
    200_v1:
      title: Successful response
      type: object
      
    200_v2:
      
      title: Successful response
      type: string
      properties:
        distance:
          $ref: '#/components/schemas/distance'
        
    distance:
      title: distance
      type: number
      format: float

  securitySchemes:
    BasicAuth:
      type: http
      scheme: basic

代码：

############################################################
#micro-services
############################################################
@app.route("/",'POST'] )
def rootTest():
    
    baseURL = "https://api.openrouteservice.org/v2/directions/driving-car?api_key=5bvbde35971110001483862480ecf8c403567479a87de01df5da651fb&start=8.681436,49.414554&end=8.681561,49.414747"

    with urllib.request.urlopen(baseURL) as response:
        print ("str(response): " + str(response))
        print ("str(response.getCode(): " + str(response.getcode()))
        data = response.read()
        print ("response.read(): " + str(data))
        dataAsJSONObject = json.loads(data)
        distance = str(dataAsJSONObject["features"][0]['properties']['summary']['distance'])
    return dataAsJSONObject #config['EndPoint']['url'] + config['EndPoint']['api_key'] + "&start=" + startLat + "," + startLng + "&end=" + end1Lat + "," + endLng + ""

@app.route("/getDistanceFromOriginToDestination/<string:originAndDestinationGPSCoords>",methods=['GET'] )
def getDistanceFromOriginToDestination(originAndDestinationGPSCoords):
    #api_key = request.args.get('api_key')
    # startLat,startLng= request.args.get('start').split(',')
    # end1Lat,endLng = request.args.get('end').split(',')
    global gpsCoordinates
    gpsCoordinates = originAndDestinationGPSCoords
    distance = 'distance could not be fetched.please enter four comma separated values and observe the order in which the coordinates must follow startLongitude,endLatitude'
    isCohesiveData = checkDataCohesion(gpsCoordinates)
    if (isCohesiveData):
        print("data is cohesive")
        data = fetchDataForURL(getBaseURL(gpsCoordinates))
        distance = fetchJSONForDistance(data)
    else:
        print("data is not cohesive")
        return distance  

    dist = float(distance)
    dist = dist/1000
    return ' %f km from Lng1:%s,Lat1:%s to Lng2:%s,Lat2:%s'%(getDistanceFromOriginToDestinatioInKilometers(float(distance)),getStartLng(),getStartLat(),getEndtLng(),getEndLat())