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fixbug
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‎_posts/2018-08-10-which-more-flask.markdown‎

Lines changed: 127 additions & 158 deletions
Original file line numberDiff line numberDiff line change
@@ -703,38 +703,6 @@ def index():
703703
if __name__ == '__main__':
704704
app.run(debug=True)
705705
```
706-
---------------------
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index.html
708-
```
709-
<!DOCTYPE html>
710-
<html lang="en">
711-
<head>
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<meta charset="UTF-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width">
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<title>Title</title>
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</head>
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<body>
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<ul>
719-
{% for foo in v2 %}
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<li>{{ foo }}</li>
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{% endfor %}
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{{ v2.1 }}
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{% for k,v in v3.items() %}
724-
<li>{{ k }} {{ v }}</li>
725-
{% endfor %}
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{{ v3.k1 }}
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{{ v3.get("k1") }}
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{{ v4|safe }}
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{{ v5 }}
730-
<h1>{{ test(1,2) }}</h1>
731-
<p>{{ sb(1,2) }}</p>
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<p>{{ 1| db(2,3) }}</p>
733-
</ul>
734-
</body>
735-
</html>
736-
```
737-
738706
PS:模板继承的方法和django的一样。
739707

740708
3.宏
@@ -759,7 +727,7 @@ html
759727
并且对 Cookies 进行密钥签名要使用会话，你需要设置一个密钥。
760728
设置：session['username'] ＝ 'xxx'
761729
删除：session.pop('username', None)
762-
```
730+
```
763731
from flask import Flask,url_for,session
764732
765733
app = Flask(__name__)
@@ -826,133 +794,134 @@ def logout():
826794
827795
# set the secret key. keep this really secret:
828796
app.secret_key = 'A0Zr98j/3yX R~XHH!jmN]LWX/,?RT'
829-
830-
自定义Session
797+
```
798+
自定义Session
799+
```
831800
pip3 install Flask-Session
832801
833-
run.py
834-
from flask import Flask
835-
from flask import session
836-
from pro_flask.utils.session import MySessionInterface
837-
app = Flask(__name__)
838-
839-
app.secret_key = 'A0Zr98j/3yX R~XHH!jmN]LWX/,?RT'
840-
app.session_interface = MySessionInterface()
841-
842-
@app.route('/login.html', methods=['GET', "POST"])
843-
def login():
844-
print(session)
845-
session['user1'] = 'alex'
846-
session['user2'] = 'alex'
847-
del session['user2']
848-
849-
return "内容"
850-
851-
if __name__ == '__main__':
852-
app.run()
853-
854-
session.py
855-
#!/usr/bin/env python
856-
# -*- coding:utf-8 -*-
857-
import uuid
858-
import json
859-
from flask.sessions import SessionInterface
860-
from flask.sessions import SessionMixin
861-
from itsdangerous import Signer, BadSignature, want_bytes
862-
863-
864-
class MySession(dict, SessionMixin):
865-
def __init__(self, initial=None, sid=None):
866-
self.sid = sid
867-
self.initial = initial
868-
super(MySession, self).__init__(initial or ())
869-
870-
871-
def __setitem__(self, key, value):
872-
super(MySession, self).__setitem__(key, value)
873-
874-
def __getitem__(self, item):
875-
return super(MySession, self).__getitem__(item)
876-
877-
def __delitem__(self, key):
878-
super(MySession, self).__delitem__(key)
879-
880-
881-
882-
class MySessionInterface(SessionInterface):
883-
session_class = MySession
884-
container = {}
885-
886-
def __init__(self):
887-
import redis
888-
self.redis = redis.Redis()
889-
890-
def _generate_sid(self):
891-
return str(uuid.uuid4())
892-
893-
def _get_signer(self, app):
894-
if not app.secret_key:
895-
return None
896-
return Signer(app.secret_key, salt='flask-session',
897-
key_derivation='hmac')
898-
899-
def open_session(self, app, request):
900-
"""
901-
程序刚启动时执行，需要返回一个session对象
902-
"""
903-
sid = request.cookies.get(app.session_cookie_name)
904-
if not sid:
905-
sid = self._generate_sid()
906-
return self.session_class(sid=sid)
907-
908-
signer = self._get_signer(app)
909-
try:
910-
sid_as_bytes = signer.unsign(sid)
911-
sid = sid_as_bytes.decode()
912-
except BadSignature:
913-
sid = self._generate_sid()
914-
return self.session_class(sid=sid)
915-
916-
# session保存在redis中
917-
# val = self.redis.get(sid)
918-
# session保存在内存中
919-
val = self.container.get(sid)
920-
921-
if val is not None:
922-
try:
923-
data = json.loads(val)
924-
return self.session_class(data, sid=sid)
925-
except:
926-
return self.session_class(sid=sid)
927-
return self.session_class(sid=sid)
928-
929-
def save_session(self, app, session, response):
930-
"""
931-
程序结束前执行，可以保存session中所有的值
932-
如：
933-
保存到resit
934-
写入到用户cookie
935-
"""
936-
domain = self.get_cookie_domain(app)
937-
path = self.get_cookie_path(app)
938-
httponly = self.get_cookie_httponly(app)
939-
secure = self.get_cookie_secure(app)
940-
expires = self.get_expiration_time(app, session)
941-
942-
val = json.dumps(dict(session))
943-
944-
# session保存在redis中
945-
# self.redis.setex(name=session.sid, value=val, time=app.permanent_session_lifetime)
946-
# session保存在内存中
947-
self.container.setdefault(session.sid, val)
948-
949-
session_id = self._get_signer(app).sign(want_bytes(session.sid))
950-
951-
response.set_cookie(app.session_cookie_name, session_id,
952-
expires=expires, httponly=httponly,
953-
domain=domain, path=path, secure=secure)
954-
955-
第三方session
802+
run.py
803+
from flask import Flask
804+
from flask import session
805+
from pro_flask.utils.session import MySessionInterface
806+
app = Flask(__name__)
807+
808+
app.secret_key = 'A0Zr98j/3yX R~XHH!jmN]LWX/,?RT'
809+
app.session_interface = MySessionInterface()
810+
811+
@app.route('/login.html', methods=['GET', "POST"])
812+
def login():
813+
print(session)
814+
session['user1'] = 'alex'
815+
session['user2'] = 'alex'
816+
del session['user2']
817+
return "内容"
818+
819+
if __name__ == '__main__':
820+
app.run()
821+
```
822+
session.py
823+
```
824+
#!/usr/bin/env python
825+
# -*- coding:utf-8 -*-
826+
import uuid
827+
import json
828+
from flask.sessions import SessionInterface
829+
from flask.sessions import SessionMixin
830+
from itsdangerous import Signer, BadSignature, want_bytes
831+
832+
833+
class MySession(dict, SessionMixin):
834+
def __init__(self, initial=None, sid=None):
835+
self.sid = sid
836+
self.initial = initial
837+
super(MySession, self).__init__(initial or ())
838+
839+
840+
def __setitem__(self, key, value):
841+
super(MySession, self).__setitem__(key, value)
842+
843+
def __getitem__(self, item):
844+
return super(MySession, self).__getitem__(item)
845+
846+
def __delitem__(self, key):
847+
super(MySession, self).__delitem__(key)
848+
849+
class MySessionInterface(SessionInterface):
850+
session_class = MySession
851+
container = {}
852+
853+
def __init__(self):
854+
import redis
855+
self.redis = redis.Redis()
856+
857+
def _generate_sid(self):
858+
return str(uuid.uuid4())
859+
860+
def _get_signer(self, app):
861+
if not app.secret_key:
862+
return None
863+
return Signer(app.secret_key, salt='flask-session',
864+
key_derivation='hmac')
865+
866+
def open_session(self, app, request):
867+
"""
868+
程序刚启动时执行，需要返回一个session对象
869+
"""
870+
sid = request.cookies.get(app.session_cookie_name)
871+
if not sid:
872+
sid = self._generate_sid()
873+
return self.session_class(sid=sid)
874+
875+
signer = self._get_signer(app)
876+
try:
877+
sid_as_bytes = signer.unsign(sid)
878+
sid = sid_as_bytes.decode()
879+
except BadSignature:
880+
sid = self._generate_sid()
881+
return self.session_class(sid=sid)
882+
883+
# session保存在redis中
884+
# val = self.redis.get(sid)
885+
# session保存在内存中
886+
val = self.container.get(sid)
887+
888+
if val is not None:
889+
try:
890+
data = json.loads(val)
891+
return self.session_class(data, sid=sid)
892+
except:
893+
return self.session_class(sid=sid)
894+
return self.session_class(sid=sid)
895+
896+
def save_session(self, app, session, response):
897+
"""
898+
程序结束前执行，可以保存session中所有的值
899+
如：
900+
保存到resit
901+
写入到用户cookie
902+
"""
903+
domain = self.get_cookie_domain(app)
904+
path = self.get_cookie_path(app)
905+
httponly = self.get_cookie_httponly(app)
906+
secure = self.get_cookie_secure(app)
907+
expires = self.get_expiration_time(app, session)
908+
909+
val = json.dumps(dict(session))
910+
911+
# session保存在redis中
912+
# self.redis.setex(name=session.sid, value=val, time=app.permanent_session_lifetime)
913+
# session保存在内存中
914+
self.container.setdefault(session.sid, val)
915+
916+
session_id = self._get_signer(app).sign(want_bytes(session.sid))
917+
918+
response.set_cookie(app.session_cookie_name, session_id,
919+
expires=expires, httponly=httponly,
920+
domain=domain, path=path, secure=secure)
921+
```
922+
923+
第三方session
924+
```
956925
#!/usr/bin/env python
957926
# -*- coding:utf-8 -*-
958927
"""

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