Flask request全局對象

導入

from flask import request

---

使用該method屬性可以使用當前請求方法 。要訪問表單數據（在POST或PUT請求中傳輸的數據），您可以使用該 form屬性。以下是上述兩個屬性的完整示例：

@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 invalid

要訪問URL（?key=value）中提交的參數，您可以使用以下 args屬性

searchword = request.args.get('key', '')

文件上傳

不要忘記在HTML表單上設置屬性enctype=”multipart/form-data”

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')

Cookies

Reading cookies:

from flask import request

@app.route('/')
def index():
    username = request.cookies.get('username')
    # use cookies.get(key) instead of cookies[key] to not get a
    # KeyError if the cookie is missing.

Storing cookies:

from flask import make_response

@app.route('/')
def index():
    resp = make_response(render_template(...))
    resp.set_cookie('username', 'the username')
    return resp