المسارات وواجهات العرض

ما هو Flask؟

from flask import Flask
app = Flask(__name__)
print('Flask app created:', app.name)

إنشاء التطبيق

from flask import Flask
app = Flask(__name__)
if __name__ == '__main__':
    # app.run() starts the development server
    print('App is ready to run')

مسارك الأول

from flask import Flask
app = Flask(__name__)

@app.route('/')
def home():
    return 'Hello, world!'
print('Route / -> home')

مسارات متعددة

from flask import Flask
app = Flask(__name__)

@app.route('/')
def home():
    return 'Home page'

@app.route('/about')
def about():
    return 'About page'
print('Two routes defined')

أجزاء URL الديناميكية

from flask import Flask
app = Flask(__name__)

@app.route('/user/<username>')
def show_user(username):
    return 'Profile of ' + username
print('URL /user/alice -> show_user')

المحوّلات ذات الأنواع

from flask import Flask
app = Flask(__name__)

@app.route('/post/<int:post_id>')
def show_post(post_id):
    return 'Post number ' + str(post_id)
print('post_id arrives as an int')

أساليب HTTP

from flask import Flask
app = Flask(__name__)

@app.route('/submit', methods=['GET', 'POST'])
def submit():
    return 'Handled GET or POST'
print('submit accepts GET and POST')

التحقق من الأسلوب

from flask import Flask, request
app = Flask(__name__)

@app.route('/submit', methods=['GET', 'POST'])
def submit():
    if request.method == 'POST':
        return 'Form submitted'
    return 'Show the form'
print('Branch on request.method')

إرجاع رموز الحالة

from flask import Flask
app = Flask(__name__)

@app.route('/missing')
def missing():
    return 'Not here', 404
print('Returns body with status 404')

إنشاء عناوين URL

from flask import Flask, url_for
app = Flask(__name__)

@app.route('/about')
def about():
    return 'About'
# url_for('about') -> '/about'
print('url_for builds URLs by view name')

تشغيل الخادم

from flask import Flask
app = Flask(__name__)

@app.route('/')
def home():
    return 'Hi'

if __name__ == '__main__':
    app.run(debug=True)

اختبار سريع

مراجعة