【脚本语言系列】关于PythonWeb服务器Flask，你需要知道的事-优快云博客

本文介绍Flask Web服务器框架的基础用法，包括简单的页面展示、模板使用、URL参数传递及GET参数处理等。Flask以其简洁性和灵活性受到开发者喜爱。

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【脚本语言系列】关于PythonWeb服务器Flask，你需要知道的事

如何使用Flask

简单网页

保存demo1.html位于脚本所处的目录下

<!--demo1.html-->
<html>
<head>
<title>Flask Demo1</title>
</head>
<body>
Hello My Friend: {{name}}
</body>
</html>

# -*- coding:utf-8 -*-
from flask import Flask

app = Flask(__name__,static_folder=".", static_url_path="")

@app.route("/")
def home():
    return app.send_static_file("demo1.html")

@app.route("/echo/<name>")
def echo(name):
    return "Hello MyFriend: %s" %name

app.run(port=9999, debug=True)

# http://127.0.0.1:9999/echo/AllenMoore

 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 602-361-623
 * Running on http://127.0.0.1:9999/ (Press CTRL+C to quit)

模板运用

保存demo1.html位于脚本所处的目录下的templates文件夹中

<!--demo1.html-->
<html>
<head>
<title>Flask Demo1</title>
</head>
<body>
Hello My Friend: {{name}}
</body>
</html>

# -*- coding:utf-8 -*-
from flask import Flask,render_template

app = Flask(__name__)

@app.route("/echo/<name>")
def echo(name):
    return render_template("demo1.html",name=name)

app.run(port=9999, debug=True)

# http://127.0.0.1:9999/echo/AllenMoore

 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 602-361-623
 * Running on http://127.0.0.1:9999/ (Press CTRL+C to quit)

URL的扩展作传参
保存demo2.html位于脚本所处的目录下的templates文件夹中

<!--demo2.html-->
<html>
<head>
<title>Flask Demo2</title>
</head>
<body>
Hello My Friend: {{name}}
Welcome To This Place: {{place}}
</body>
</html>

# -*- coding:utf-8 -*-
from flask import Flask,render_template

app = Flask(__name__)

@app.route("/echo/<name>/<place>")
def echo(name, place):
    return render_template("demo2.html", name=name, place=place)

app.run(port=9999, debug=True)

# http://127.0.0.1:9999/echo/AllenMoore/TheMachine

 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 602-361-623
 * Running on http://127.0.0.1:9999/ (Press CTRL+C to quit)

GET参数作传参
URL的扩展作传参
保存demo3.html位于脚本所处的目录下的templates文件夹中

<!--demo2.html-->
<html>
<head>
<title>Flask Demo2</title>
</head>
<body>
Hello My Friend: {{name}}
Welcome To This Place: {{place}}
</body>
</html>

# -*- coding:utf-8 -*-
from flask import Flask,render_template,request

app = Flask(__name__)

@app.route("/echo/")
def echo():
    kwargs={}
    kwargs["name"] = request.args.get("name")
    kwargs["place"] = request.args.get("place")
    return render_template("demo3.html", **kwargs)

app.run(port=9999, debug=True)

# http://127.0.0.1:9999/echo/?name=AllenMoore&place=TheMachine

 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 602-361-623
 * Running on http://127.0.0.1:9999/ (Press CTRL+C to quit)

什么是Flask

Flask是Web服务器框架，定位于入门级。

为何使用Flask

Flask如同Bottle一样简单，而且还能扩展许多扩展功能，比如认证服务。