flask构建自动化测试平台4-用户输入

本章将介绍以下主题：

• 使用HTTP GET获取用户输入
• 使用HTTP POST获取用户输入
• 添加天气和货币数据

本文最新版本

GET

HTTP GET从用户获取有限的非敏感信息，以便服务器根据GET参数的要求返回页面。GET请求不应该修改服务器状态，用户应该多次请求返回相同的结果。

全局变量request已经帮你处理好了请求顺序和线程。参考资料。认情况下，只允许GET。

POST

HTTP POST用于提交更大的数据块或更敏感的数据到服务器。 通过POST请求发送的数据在网址中不可见。

实例

代码： headlines.py

import feedparser
from flask import Flask
from flask import render_template
from flask import request
import json
import urllib

app = Flask(__name__)

RSS_FEEDS = {'ft': 'http://www.ftchinese.com/rss/feed',
             'zhihu': 'https://www.zhihu.com/rss',
             'people': 'http://www.people.com.cn/rss/politics.xml',
             'iol': 'http://www.iol.co.za/cmlink/1.640'}

WEATHER_URL = "http://api.openweathermap.org/data/2.5/weather?q={}&units=metric&APPID=cb932829eacb6a0e9ee4f38bfbf112ed"
CURRENCY_URL = "https://openexchangerates.org//api/latest.json?app_id=b23c94daab584f4580e4e2bf75cbcf7e"

DEFAULTS = {'publication': 'ft',
            'city': 'wugang',
            'currency_from': 'GBP',
            'currency_to': 'USD'
            }


@app.route("/")
def home():
    # get customised headlines, based on user input or default
    publication = request.args.get('publication')
    if not publication:
        publication = DEFAULTS['publication']
    articles = get_news(publication)
    # get customised weather based on user input or default
    city = request.args.get('city')
    if not city:
        city = DEFAULTS['city']
    weather = get_weather(city)
    # get customised currency based on user input or default
    currency_from = request.args.get("currency_from")
    if not currency_from:
        currency_from = DEFAULTS['currency_from']
    currency_to = request.args.get("currency_to")
    if not currency_to:
        currency_to = DEFAULTS['currency_to']
    rate, currencies = get_rate(currency_from, currency_to)
    return render_template("home.html", articles=articles, weather=weather,
                           currency_from=currency_from, currency_to=currency_to, rate=rate,
                           currencies=sorted(currencies))


def get_rate(frm, to):
    all_currency = urllib.request.urlopen(CURRENCY_URL).read().decode('utf-8') 
    parsed = json.loads(all_currency).get('rates')
    frm_rate = parsed.get(frm.upper())
    to_rate = parsed.get(to.upper())
    return (to_rate / frm_rate, parsed.keys())


def get_news(publication):
    feed = feedparser.parse(RSS_FEEDS[publication])
    return feed['entries']


def get_weather(query):
    query = urllib.parse.quote(query)
    url = WEATHER_URL.format(query)
    data = urllib.request.urlopen(url).read().decode('utf-8')
    parsed = json.loads(data)
    weather = None
    if parsed.get('weather'):
        weather = {'description': parsed['weather'][0]['description'],
                   'temperature': parsed['main']['temp'],
                   'city': parsed['name'],
                   'country': parsed['sys']['country']
                   }
    return weather

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

home.html

    
        
    
    
        
Headlines

        
Current weather

        

          
          
        

        
City: {{weather.city}}, {{weather.country}}
        
{{weather.description}} |{{weather.temperature}}℃

        
Currency

        

            from: 
                    {% for currency in currencies %}
                        {{currency}}
                    {% endfor %}
                  

             to: 
                    {% for currency in currencies %}
                        {{currency}}
                    {% endfor %}
                  
                 
        

        1 {{currency_from}} = {{currency_to}} {{rate}}

        
Headlines
        

          
          
        

        {% for article in articles %}
            {{article.title}}

            {{article.published}}

            
{{article.summary}}
 
            

        {% endfor %}
     
    

image.png

参考资料

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