Some code comes from: http://flask.pocoo.org/docs/0.10/quickstart/
1.
from flask import Flask
app = Flask(__name__)
@app.route('/')
def hello_world():
return 'Hello World!'
if __name__ == '__main__':
app.run()
2.
To let the server accessible for any other in the Network.
app.run(host='0.0.0.0')
3.
@app.route('/user/<username>')
def show_user_profile(username):
# show the user profile for that userreturn 'User %s' % username
@app.route('/post/<int:post_id>')
def show_post(post_id):
# show the post with the given id, the id is an integerreturn 'Post %d' % post_id
The following converters exist:
int accepts integers
float like int but for floating point values
path like the default but also accepts slashes
4.
@app.route('/login', methods=['GET', 'POST'])
def login():
if request.method == 'POST':
do_the_login()
else:show_the_login_form()
5.
Static Files
url_for('static', filename='style.css')
6.
request
@app.route('/login', methods=['POST', 'GET'])
def login():
error = None
if request.method == 'POST':
if valid_login(request.form['username'],
request.form['password']):
return log_the_user_in(request.form['username'])
else:error = 'Invalid username/password'
# the code below is executed if the request method# was GET or the credentials were invalidreturn render_template('login.html', error=error)
7.
request–>get
searchword = request.args.get('key', '')
8.
Files Upload
from flask import request
@app.route('/upload', methods=['GET', 'POST'])
def upload_file():
if request.method == 'POST':
f = request.files['the_file']
f.save('/var/www/uploads/uploaded_file.txt')
...
