使用 Flask 服务器的 Covid 疫苗可用性

在本文中，我们将使用 Flask Server构建Covid 疫苗可用性检查器。

我们都知道整个世界都在遭受大流行病的折磨，唯一能帮助我们摆脱这种局面的就是大规模接种疫苗。但正如我们所知，由于该国人口众多，在我们附近的地区很难找到疫苗。因此，现在技术进入了画面，我们将构建我们自己的 covid 疫苗可用性检查器，以查找我们附近地区的疫苗可用性。

我们将使用一些Python库来查找疫苗的可用性并使用烧瓶服务器显示它们。将来，您还可以将其部署在实时服务器上。首先，我们必须使用以下命令安装Python Flask 包：

pip install flask

安装Python flask 包后，打开 Pycharm 或任何 IDE（最好是 Visual Studio Code）并创建一个新项目。在此之后制作一个主要的Python文件app.py和两个名为templates的文件夹，另一个是静态的（文件夹的名称必须与写入的名称相同）。

下面是表示项目目录结构的图像。

分步实施

第 1 步：在第一步中，我们必须导入我们将在项目中进一步使用的Python库。另外，制作一个 Flask 服务器的应用程序。

Python

from flask import Flask,request,session,render_template
import requests,time
from datetime import datetime,timedelta
  
app = Flask(__name__)

第 2 步：添加路由以处理客户端请求。

蟒蛇3

@app.route('/')
def home():
  
    # rendering the homepage of project
    return render_template("index.html")
  
@app.route('/CheckSlot')
def check():
  
    # for checking the slot available or not
      
    # fetching pin codes from flask
    pin = request.args.get("pincode")
      
    # fetching age from flask
    age = request.args.get("age")
    data = list()
      
    # finding the slot
    result = findSlot(age, pin, data)
      
    if(result == 0):
        return render_template("noavailable.html")
    return render_template("slot.html", data=data)

第 3 步：这是我们项目的主要步骤，它查找疫苗的可用性（findslot()函数将执行以下操作）：

• 首先从Python 的DateTime 库中获取年龄、pin 和查找日期等参数。
• 从 covin 官方网站上获取数据，例如疫苗剂量、疫苗接种中心、可用性、疫苗类型和价格等。
• 将所有数据存储在Python列表中。

蟒蛇3

def findSlot(age,pin,data):
    
    flag = 'y'
    num_days =  2
    actual = datetime.today()
    list_format = [actual + timedelta(days=i) for i in range(num_days)]
    actual_dates = [i.strftime("%d-%m-%Y") for i in list_format]
      
    while True:
        counter = 0
        for given_date in actual_dates:
            
            # cowin website Api for fetching the data
            URL = "https://cdn-api.co-vin.in/api/v2/appointment/sessions/public/calendarByPin?pincode={}&date={}".format(pin, given_date)
            header = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.76 Safari/537.36'}
              
            # Get the results in json format.
            result = requests.get(URL,headers = header)
            if(result.ok):
                response_json = result.json()
                if(response_json["centers"]):
                    
                    # Checking if centres available or not
                    if(flag.lower() == 'y'):
                        for center in response_json["centers"]:
                            
                            # For Storing all the centre and all parameters
                            for session in center["sessions"]:
                                
                                # Fetching the availability in particular session
                                datas = list()
                                  
                                # Adding the pincode of area in list
                                datas.append(pin)
                                  
                                # Adding the dates available in list
                                datas.append(given_date)
                                  
                                # Adding the centre name in list
                                datas.append(center["name"])
                                  
                                # Adding the block name in list
                                datas.append(center["block_name"])
                                  
                                # Adding the vaccine cost type whether it is
                                # free or chargable.
                                datas.append(center["fee_type"])
                                  
                                # Adding the available capacity or amount of 
                                # doses in list
                                datas.append(session["available_capacity"])
                                if(session["vaccine"]!=''):
                                    datas.append(session["vaccine"])
                                counter =counter + 1
                                  
                                # Add the data of particular centre in data list.
                                if(session["available_capacity"]>0):
                                    data.append(datas)
            else:
                print("No response")
        if counter == 0:
            return 0
        return 1

下面是 app.py 的完整实现

蟒蛇3

from flask import Flask,request,session,render_template
import requests,time
from datetime import datetime,timedelta
  
app = Flask(__name__)
  
@app.route('/')
def home():
    return render_template("index.html")
  
@app.route('/CheckSlot')
def check():
    
    # fetching pin codes from flask
    pin = request.args.get("pincode")
      
    # fetching age from flask
    age = request.args.get("age")
    data = list()
      
    # finding the slot
    result = findSlot(age,pin,data)
      
    if(result == 0):
        return render_template("noavailable.html") 
    return render_template("slot.html",data = data)
  
def findSlot(age,pin,data):
    flag = 'y'
    num_days =  2
    actual = datetime.today()
    list_format = [actual + timedelta(days=i) for i in range(num_days)]
    actual_dates = [i.strftime("%d-%m-%Y") for i in list_format]
      
    # print(actual_dates)
    while True:
        counter = 0
        for given_date in actual_dates:
            
            # cowin website Api for fetching the data
            URL = "https://cdn-api.co-vin.in/api/v2/appointment/sessions/public/calendarByPin?pincode={}&date={}".format(pin, given_date)
            header = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.76 Safari/537.36'}
               
            # Get the results in json format.
            result = requests.get(URL,headers = header)
            if(result.ok):
                response_json = result.json()
                if(response_json["centers"]):
                    
                    # Checking if centres available or not
                    if(flag.lower() == 'y'):
                        for center in response_json["centers"]:
                            
                            # For Storing all the centre and all parameters
                            for session in center["sessions"]:
                                
                                # Fetching the availability in particular session
                                datas = list()
                                  
                                # Adding the pincode of area in list
                                datas.append(pin)
                                  
                                # Adding the dates available in list
                                datas.append(given_date)
                                  
                                # Adding the centre name in list
                                datas.append(center["name"])
                                  
                                # Adding the block name in list
                                datas.append(center["block_name"])
                                  
                                # Adding the vaccine cost type whether it is
                                # free or chargable.
                                datas.append(center["fee_type"])
                                  
                                # Adding the available capacity or amount of 
                                # doses in list
                                datas.append(session["available_capacity"])
                                if(session["vaccine"]!=''):
                                    datas.append(session["vaccine"])
                                counter =counter + 1
                                  
                                # Add the data of particular centre in data list.
                                if(session["available_capacity"]>0):
                                    data.append(datas)
                                      
            else:
                print("No response")
        if counter == 0:
            return 0
        return 1
  
if __name__ == "__main__":
    app.run()

第 4 步：现在在模板文件夹中创建三个文件。

• index.html：显示项目的主页，用于输入年龄和密码。
• slot.html：在页面上显示数据。
• noavailable.html：如果在任何中心都没有找到疫苗，则 - 无可用性页面。

index.html 代码

HTML

   
      
      
      
      
      
      
      Covid Vaccination Slots
   
   
      Find Your Vaccination Slots
      
      
         
            
               
                  
               
               
                  
               
               
            
            
            
            Previous
            
            
            
            Next
            
         
      
      Enter Your Credentials here 
      
         
            Pincode
            
            Age
            
            
         
      
      
      
      
      
      
   

插槽.html

HTML

   
      
      
      
      
      
   
   
      
Vaccination Slots Availability
      




      

         
         
            
               
                  
                  
                  
                  
                  
                  
                  
               
            
            
               {% for item in data%}
               
                  
                  
                  
                  
                  
                  
                  
               
               {% endfor %}
            
         
Pincode
Date
Vaccination Center Name
BlockName
Price
Available Capacity
Vaccine Type
{{item[0]}}
{{item[1]}}
{{item[2]}}
{{item[3]}}
{{item[4]}}
{{item[5]}}
{{item[6]}}
      
      

      Visit Government Website for Booking Slot
   

不可用.html

HTML

   
      
      
      
      
   
   
Sorry !
  
   
      
No Available Vaccine Slots
   

将图像或其他文件（如果有）添加到静态文件夹。