image.png
app/app.py
from flask import Flask
__author__ = "gaowenfeng"
def create_app():
app = Flask(__name__)
app.config.from_object('app.config.secure')
app.config.from_object('app.config.setting')
return app
ginger.py
from app.app import create_app
__author__ = "gaowenfeng"
app = create_app()
if __name__ == '__main__':
app.run(debug=True)
1.蓝图的作用并不是用来拆分视图函数的,而是用来拆分模块的 2.使用蓝图,统一个业务模型的试图函数的前缀都一样,代码重复啰嗦
为了解决上面的两个问题,我们可以模仿蓝图,构建一个自定义的对象-红图,红图的定位是用来拆分视图,也就是视图函数层
image.png
我们采用自顶向下的编程思想,先编写redprint在试图函数中的使用代码,再编写redprint具体的实现
app/api/v1/book.py
from app.libs.redprint import RedPrint
__author__ = "gaowenfeng"
api = RedPrint('book')
@api.route('/get')
def get_book():
return 'get book'
@api.route('/create')
def create():
return 'create book'
app/api/v1/user.py
from app.libs.redprint import RedPrint
__author__ = "gaowenfeng"
api = RedPrint('user')
@api.route('/get')
def get_user():
return 'i am gwf'
app/api/__init__.py
from flask import Blueprint
from app.api.v1 import book, user
__author__ = "gaowenfeng"
def create_blueprint_v1():
bp_v1 = Blueprint('v1', __name__)
# 假设api有register的方法,后面再实现, url_prefix解决前缀问题
book.api.register(bp_v1, url_prefix='/book')
user.api.register(bp_v1, url_prefix='/user')
return bp_v1
app/app.py
from flask import Flask
__author__ = "gaowenfeng"
def register_blueprint(app):
from app.api.v1 import create_blueprint_v1
# url_prefix定义url前缀
app.register_blueprint(create_blueprint_v1(), url_prefix='/v1')
def create_app():
app = Flask(__name__)
app.config.from_object('app.config.secure')
app.config.from_object('app.config.setting')
register_blueprint(app)
return app
因为我们的红图的作用就是要代替蓝图来实现试图函数的拆分,所以功能实现上可以参考蓝图的实现。
蓝图的实现
def route(self, rule, **options):
"""Like :meth:`Flask.route` but for a blueprint. The endpoint for the
:func:`url_for` function is prefixed with the name of the blueprint.
"""
def decorator(f):
# 获取endpoint,默认为试图函数名
endpoint = options.pop("endpoint", f.__name__)
# 注册视图函数
self.add_url_rule(rule, endpoint, f, **options)
return f
return decorator
红图的实现可以模仿蓝图的实现结构 ,由于红图的route里没有办法拿到蓝图的对象,所以我们可以先把他们存储起来,等碰到的时候再进行注册
class Redprint:
def __init__(self, name):
self.name = name
self.mound = []
def route(self, rule, **options):
def decorator(f):
self.mound.append((f, rule, options))
return f
return decorator
在register方法中可以获取到蓝图对象,所以之前route中视图函数的注册延迟到这里进行
def register(self, bp, url_prefix=None):
# 如果不传url_prefix 则默认使用name
if url_prefix is None:
url_prefix = '/'+self.name
# python的自动拆包
for f, rule, options in self.mound:
endpoint = options.pop("endpoint", f.__name__)
# 将视图函数注册到蓝图上来
bp.add_url_rule(url_prefix + rule, endpoint, f, **options)