Flask
DBpool
import pymysql
from DBUtils.PooledDB import PooledDB
POOL = PooledDB(
creator=pymysql, # 使用链接数据库的模块
maxconnections=6, # 连接池允许的最大连接数，0和None表示不限制连接数
mincached=2, # 初始化时，链接池中至少创建的空闲的链接，0表示不创建
maxcached=5, # 链接池中最多闲置的链接，0和None不限制
maxshared=3, # 链接池中最多共享的链接数量，0和None表示全部共享。PS: 无用，
# 因为pymysql和MySQLdb等模块的 threadsafety都为1，所有值无论设置为多少，
# _maxcached永远为0，所以永远是所有链接都共享。
blocking=True, # 连接池中如果没有可用连接后，是否阻塞等待。True，等待；False，不等待然后报错
maxusage=None, # 一个链接最多被重复使用的次数，None表示无限制
setsession=[], # 开始会话前执行的命令列表。如：["set datestyle to ...", "set time zone ..."]
ping=0,
# ping MySQL服务端，检查是否服务可用。
# 如：0 = None = never,
# 1 = default = whenever it is requested,
# 2 = when a cursor is created,
# 4 = when a query is executed,
# 7 = always
host="127.0.0.1",
port=3306,
user="root",
password="",
charset="utf8",
db="day115"
)
#
# conn = POOL.connection() # pymysql - conn
# cur = conn.cursor(cursor=pymysql.cursors.DictCursor)
#
# sql = "select * from users WHERE name='jwb' and age=73 "
#
# res = cur.execute(sql)
#
#
# print(cur.fetchall())
#
# conn.close()
mysql回顾
import pymysql
mysql_conn = pymysql.connect(host="127.0.0.1",
port=3306,
user="root",
password="",
charset="utf8",
db="day115")
c = mysql_conn.cursor(cursor=pymysql.cursors.DictCursor)
sql = "select * from users WHERE name='jwb' and age=73 "
res = c.execute(sql)
print(c.fetchall())
c.close()
mysql_conn.close()
flask_session
from flask import Flask, session
from flask_session import Session
from redis import Redis
app = Flask(__name__)
# app.secret_key = "asdf%^&*"
app.config["SESSION_TYPE"] = "redis"
app.config["SESSION_REDIS"] = Redis(host="127.0.0.1", port=6379, db=6)
Session(app)
@app.route("/")
def index():
session["user"] = "value"
return "hello"
if __name__ == '__main__':
app.run(debug=True)
# 相关参数介绍
from flask import Flask, render_template,request
from wtforms.fields import simple, core
from wtforms import validators
from wtforms import Form
app = Flask(__name__)
class LoginForm(Form):
username = simple.StringField(
label="用户名", # 标签标记
validators=[validators.DataRequired(message="用户名不能为空"),
validators.Length(min=3,max=8,message="不是长了就是短了")], # 校验条件 可迭代条件
# description='11111111111', # 描述标记
id="user_id", # 标签ID
default=None, # 默认值
widget=None, # 默认组件(input type="text") 在StringField中已经被实例化了
render_kw={"class":"my_login"}, # {"class":"my_login"}
)
password = simple.PasswordField(
label="密码", # 标签标记
validators=[validators.DataRequired(message="密码不能为空"),
validators.Length(min=3, max=16, message="不是长了就是短了"),
validators.Email(message="密码必须符合邮箱规则")], # 不知道
# description='11111111111', # 描述标记
id="user_id", # 标签ID
default=None, # 默认值
widget=None, # 默认组件(input type="text") 在StringField中已经被实例化了
render_kw={"class": "my_login"}, # {"class":"my_login"}
)
class RegForm(Form):
username = simple.StringField(
label="用户名", # 标签标记
validators=[validators.DataRequired(message="用户名不能为空"),
validators.Length(min=3,max=8,message="用户名不是长了就是短了")], # 校验条件 可迭代条件
)
password = simple.PasswordField(
label="密码", # 标签标记
validators=[validators.DataRequired(message="密码不能为空"),
validators.Length(min=3, max=16, message="密码不是长了就是短了"),
validators.Email(message="密码必须符合邮箱规则")],
)
repassword = simple.PasswordField(
label="确认密码", # 标签标记
validators=[validators.EqualTo(fieldname="password",message="眼神未确认")]
)
gender = core.RadioField(
label="性别",
coerce=str,
choices=(
("1","女"),
("2","男")
),
default="1"
)
hobby = core.SelectMultipleField(
label="爱好",
validators=[validators.Length(min=2,max=4,message="癖好有问题")],
coerce=int,
choices=(
(1, "fengjie"),
(2, "luoyufeng"),
(3, "lixueqin"),
(4, "wuyifan"),
(5, "panta")
),
default=(1,3,5)
)
@app.route("/",methods=["GET","POST"])
def index():
if request.method == "GET":
fm = LoginForm()
return render_template("index.html",wtf = fm)
else:
new_fm = LoginForm(request.form)
if new_fm.validate():
return new_fm.data.get("password")
else:
return render_template("index.html", wtf=new_fm)
@app.route("/reg",methods=["GET","POST"])
def reg():
if request.method == "GET":
rf = RegForm()
return render_template("reg.html",rf = rf)
else:
rf = RegForm(request.form)
if rf.validate():
print(type(rf.data.get("gender")),rf.data.get("gender"))
return rf.data.get("password")
else:
return render_template("reg.html", rf=rf)
if __name__ == '__main__':
app.run(debug=True)
app.__call__
sqlhelper
from dbpool import POOL
import pymysql
# sql = ""
def create_conn():
conn = POOL.connection()
cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
return conn, cursor
def close_conn(conn, cursor):
cursor.close()
conn.close()
def insert(sql, args):
conn, cursor = create_conn()
res = cursor.execute(sql, args)
conn.commit()
close_conn(conn, cursor)
return res
def update(sql, args):
conn, cursor = create_conn()
res = cursor.execute(sql, args)
conn.commit()
close_conn(conn, cursor)
return res
def fetch_one(sql, args):
conn, cursor = create_conn()
cursor.execute(sql, args)
res = cursor.fetchone()
close_conn(conn, cursor)
return res
def fetch_all(sql, args):
conn, cursor = create_conn()
cursor.execute(sql, args)
res = cursor.fetchall()
close_conn(conn, cursor)
return res
# sql = "insert into users(name,age) VALUES (%s, %s)"
# insert(sql,("mjj",9))
search_sql = "Select * from users where name=%s and age=%s"
update_sql = "UPDATE users SET name=%s and age=%s"
print(fetch_one(search_sql, ("mjj", 9)))
websocket_hello
import socket
import base64
import hashlib
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind(('127.0.0.1', 9527))
sock.listen(5)
# 获取客户端socket对象
conn, address = sock.accept()
# 获取客户端的【握手】信息
data = conn.recv(1024)
print(data)
"""
GET /ws HTTP/1.1\r\n
Host: 127.0.0.1:9527\r\n
Connection: Upgrade\r\n
Pragma: no-cache\r\n
Cache-Control: no-cache\r\n
User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36\r\n
Upgrade: websocket\r\n
Origin: http://localhost:63342\r\n
Sec-WebSocket-Version: 13\r\n
Accept-Encoding: gzip, deflate, br\r\n
Accept-Language: zh-CN,zh;q=0.9\r\n
Cookie: session=a6f96c20-c59e-4f33-84d9-c664a2f29dfc\r\n
Sec-WebSocket-Key: MAZZU5DPIxWmhk/UWL2+BA==\r\n
Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits\r\n\r\n
"""
# 以下动作是有websockethandler完成的
# magic string为：258EAFA5-E914-47DA-95CA-C5AB0DC85B11
def get_headers(data):
header_dict = {}
header_str = data.decode("utf8")
for i in header_str.split("\r\n"):
if str(i).startswith("Sec-WebSocket-Key"):
header_dict["Sec-WebSocket-Key"] = i.split(":")[1].strip()
return header_dict
headers = get_headers(data) # 提取请求头信息
#
magic_string = '258EAFA5-E914-47DA-95CA-C5AB0DC85B11'
#Sec-WebSocket-Key: MAZZU5DPIxWmhk/UWL2+BA==
value = headers['Sec-WebSocket-Key'] + magic_string
print(value)
ac = base64.b64encode(hashlib.sha1(value.encode('utf-8')).digest())
# 对请求头中的sec-websocket-key进行加密
response_tpl = "HTTP/1.1 101 Switching Protocols\r\n" \
"Upgrade:websocket\r\n" \
"Connection: Upgrade\r\n" \
"Sec-WebSocket-Accept: %s\r\n" \
"WebSocket-Location: ws://127.0.0.1:9527\r\n\r\n"
print(ac.decode('utf-8'))
response_str = response_tpl % (ac.decode('utf-8'))
# 响应【握手】信息
conn.send(response_str.encode("utf8"))
#
while True:
msg = conn.recv(8096)
print(msg)
websocket_加密
import struct
msg_bytes = "the emperor has not been half-baked in the early days of the collapse of the road, today down three points, yizhou weakness, this serious crisis autumn".encode("utf8")
token = b"\x81" # + 数据长度/运算位 + mask/数据长度 + mask/数据 + 数据
length = len(msg_bytes)
if length < 126:
token += struct.pack("B", length)
elif length == 126:
token += struct.pack("!BH", 126, length)
else:
token += struct.pack("!BQ", 127, length)
msg = token + msg_bytes
print(msg)
websocket_解密
# b'\x81\x89\xf3\x99\x81-\x15\x05\x01\xcbO\x1be\x97]'
# b'\x81\x85s\x92a\x10\x1b\xf7\r|\x1c'
# b'\x81\x83H\xc0x\xa6y\xf2K'
hashstr = b'\x81\x85s\x92a\x10\x1b\xf7\r|\x1c'
# b'\x81 \x85s \x92a\x10\x1b\xf7 \r|\x1c' <126
# \x85s = 5
hashstr = b'\x81\xfe\x02\xdc\x8d\xe8-\xb2hm\xa5W5u\xc8:\x16\x0c\x95(kt\x87W\x00b\xc52\x01\x0c\x95\x1fdi\xbeW9A\xcb\x1c\x0f\x07\x91>iS\xa7W)A\xc9\n\x06\x0c\x95;h`\xab]1d\xca)\x07\r\x9a,j~\x9fW1b\xc2\x0e\x01\x0e\x80\x16eG\xb7W\x00Y\xcb2(\r\x80*iR\x8cV4c\xca\x15\x06\x0c\x94-nh\xafU\t^\xc9\x0c\x00\r\xa0\x19iQ\xa6Z\nK\xc9\n\x00\x0e\xaa:iR\xa3W\x0bm\xc2\x0e\x01\r\x92\x12hW\xbaV4c\xc8\x11&\r\x92*eR\x86V7f\xc8\x16\x1b\x00\xad7bT\xa1U\x16~\xc5\r0\r\xa8:hP\xb0V4c\xcb\x1c\x07\x01\xac5bT\xa1T!Z\xcb8(\x0c\x949iR\xa3[\x14s\xc9\n\x06\x0c\x94-nh\xafZ"r\xc8\x1c\x11\r\x912hT\x8dW\x11K\xc8"!\x07\x91>iS\x88W\x08a\xc87\x05\r\x95/di\xbaW3_\xc2\x0e\x01\x0e\xac\x10hT\xb5W2\x7f\xc8\x11&\x0c\x949kX\xb9]1d\xc9\n\x00\r\x83.hN\xa9Z\nB\xc5=?\x00\xbb6bT\xa1W1}\xc8$6\r\x89\x03iQ\xa4]1d\xc9\t(\r\x8c,hW\x8dZ=g\xc9\x0b\x06\x00\x9a\x1diQ\xb2Q\rj\xc8\x1c&\x0c\x95\x1fhR\xb1V5E\xc2\x0e\x01\x0c\x92\x03iP\x97V5h\xc9\x0f\x1e\x07\x91>dq\xb2U0r\xc55*\r\xbd\x14bT\xa1V5e\xc8\x1c\x11\r\x910hx\xa1Q\rj\xc59(\x0e\xb1;iU\xb1W(P\xca8"\x0f\x8a#hg\xa7V5R\xc8\r-\r\xbb6eh\xa8]1d\xc8\x1c\x11\x0c\x96*kt\xa4W\x02P\xc5\x1c7\r\xa8\x04h`\xbcZ8g\xc2\x0e\x01\x0c\x96\x17kp\x80[\x14s\xc9\n\x06\r\x94\x01kp\xa3V4c\xca"\x0b\x07\x91>iP\xa0W#t\xc83\x02\x0f\x8a3bT\xa1V0W\xc84\x08\r\x89$hT\xafT>}\xc9\x0b\x12\x0b\xad0iV\xa0V5E\xce2\x0c\x0c\x93?dk\xa3[\x0eE\xcb&5\x0c\x949nh\xacZ9Q\xca\x17\x03\x0b\xad3ey\x8eW\x08i\xca\x1f\x04\x07\x91>kE\x89U\x17n\xc5;"\r\x83,bT\xa1W2\x7f\xc5+\x1c\r\x92\x12jR\x82]1d\xcb*"\x0c\x96\x17hm\xa5W5u\xca\x1c\r\x0e\xa6&iS\x88[\x0c\x7f\xc4+\x16\x0c\x959nh\xafT\tr\xc9\t(\x0c\x95\x08hF\x86V5E\xc9\x0b\x06\x0c\x979bT\xa1V7c\xcb%-\r\x89\x15hX\xa2]1d\xcb0\x04\x0c\x96\x17hz\x85V4c\xc2\x0e\x01\x0f\xa9\x04hx\xa3T\x1bU\xc5\x13\x01\x07\x91>hW\xa8Z\x0eU\xc5\x11%\x00\x8c\x17dp\xb4T1g\xc2\x0e\x01\x0e\xb1;ka\xadW4W\xca)\x07\x0b\xad0'
# print(chushibiao[1],chushibiao[1]&127)
# print(chushibiao[2:4],chushibiao[4:8])
# 将第二个字节也就是 \x83 第9-16位 进行与127进行位运算
payload = hashstr[1] & 127
print(payload)
if payload == 127:
extend_payload_len = hashstr[2:10]
mask = hashstr[10:14]
decoded = hashstr[14:]
# 当位运算结果等于127时,则第3-10个字节为数据长度
# 第11-14字节为mask 解密所需字符串
# 则数据为第15字节至结尾
if payload == 126:
extend_payload_len = hashstr[2:4]
mask = hashstr[4:8]
decoded = hashstr[8:]
# 当位运算结果等于126时,则第3-4个字节为数据长度
# 第5-8字节为mask 解密所需字符串
# 则数据为第9字节至结尾
if payload <= 125:
extend_payload_len = None
mask = hashstr[2:6]
decoded = hashstr[6:]
# 当位运算结果小于等于125时,则这个数字就是数据的长度
# 第3-6字节为mask 解密所需字符串
# 则数据为第7字节至结尾
str_byte = bytearray()
# b'\x81 \x85s \x92a\x10\x1b \xf7\r|\x1c' <126
for i in range(len(decoded)): # 0 \xf7 ^ \x92a 1 \r ^ \x10 \x1c ^ \x1b
byte = decoded[i] ^ mask[i % 4]
str_byte.append(byte)
print(str_byte.decode("utf8"))
ws简单了解回顾
from flask import Flask, request
from geventwebsocket.handler import WebSocketHandler
from gevent.pywsgi import WSGIServer
from geventwebsocket.websocket import WebSocket
app = Flask(__name__)
@app.route("/")
def index():
return "hello"
@app.route("/ws")
def ws():
user_socket = request.environ.get("wsgi.websocket") # type:WebSocket
while 1:
msg = user_socket.receive()
print(msg)
user_socket.send(msg)
if __name__ == '__main__':
# app.run(debug=True)
http_server = WSGIServer(("0.0.0.0", 9527), app, handler_class=WebSocketHandler)
http_server.serve_forever()
