mini-web框架-路由(支持正则)-url编码

mini web框架-路由功能(支持正则表达式参数)

dynamic/my_web.py

import pymysql
import time
import os
import re

template_root = "./templates"

# 用来存放url路由映射
# url_route = {
#   "/index.py":index_func,
#   "/center.py":center_func
# }
g_url_route = dict()

def route(url):
def set_func(func):
# 添加键值对，key是需要访问的url，value是当这个url需要访问的时候，需要调用的函数引用
g_url_route[url]=func
def call_func(file_name):
return func(file_name)
return call_func
return set_func

@route(r"/index.html")
def index(file_name, url=None):
"""返回index.html需要的页面内容"""
# return "hahha" + os.getcwd()  # for test 路径问题
try:
file_name = file_name.replace(".py", ".html")
f = open(template_root + file_name)
except Exception as ret:
return "%s" % ret
else:
content = f.read()
f.close()

# data_from_mysql = "暂时没有数据，请等待学习mysql吧，学习完mysql之后，这里就可以放入mysql查询到的数据了"
db = pymysql.connect(host='localhost',port=3306,user='root',password='mysql',database='stock_db',charset='utf8')
cursor = db.cursor()
sql = """select * from info;"""
cursor.execute(sql)
data_from_mysql = cursor.fetchall()
cursor.close()
db.close()

html_template = """
<tr>
<td>%d</td>
<td>%s</td>
<td>%s</td>
<td>%s</td>
<td>%s</td>
<td>%s</td>
<td>%s</td>
<td>%s</td>
<td>
<input type="button" value="添加" id="toAdd" name="toAdd" systemidvaule="%s">
</td>
</tr>"""

html = ""

for info in data_from_mysql:
html += html_template % (info[0], info[1], info[2], info[3], info[4], info[5], info[6], info[7], info[1])

content = re.sub(r"\{%content%\}", html, content)

return content

@route(r"/center.html")
def center(file_name, url=None):
"""返回center.html需要的页面内容"""
# return "hahha" + os.getcwd()  # for test 路径问题
try:
file_name = file_name.replace(".py", ".html")
f = open(template_root + file_name)
except Exception as ret:
return "%s" % ret
else:
content = f.read()
f.close()

# data_from_mysql = "暂时没有数据,,,,~~~~(>_<)~~~~ "
db = pymysql.connect(host='localhost',port=3306,user='root',password='mysql',database='stock_db',charset='utf8')
cursor = db.cursor()
sql = """select i.code,i.short,i.chg,i.turnover,i.price,i.highs,j.note_info from info as i inner join focus as j on i.id=j.info_id;"""
cursor.execute(sql)
data_from_mysql = cursor.fetchall()
cursor.close()
db.close()
# 格式化输出请求的内容
html_template = """
<tr>
<td>%s</td>
<td>%s</td>
<td>%s</td>
<td>%s</td>
<td>%s</td>
<td>%s</td>
<td>%s</td>
<td>
<a type="button" class="btn btn-default btn-xs" href="/update/%s.html"> <span class="glyphicon glyphicon-star" aria-hidden="true"></span> 修改 </a>
</td>
<td>
<input type="button" value="删除" id="toDel" name="toDel" systemidvaule="%s">
</td>
</tr>
"""

html = ""
# 拼接请求的数据
for info in data_from_mysql:
html += html_template % (info[0], info[1], info[2], info[3], info[4], info[5], info[6], info[0], info[0])
# 用查询出的数据替换模板中的占位符
content = re.sub(r"\{%content%\}", html, content)

return content

# ------- 添加 -------
@route(r"/update/(\d*)\.html")
def update(file_name, url):
"""显示 更新页面的内容"""
try:
template_file_name = template_root + "/update.html"
f = open(template_file_name)
except Exception as ret:
return "%s,,,没有找到%s" % (ret, template_file_name)
else:
content = f.read()
f.close()

ret = re.match(url, file_name)
if ret:
stock_code = ret.group(1)

# 将提取到的股票编码返回到浏览器中,以检查是否能够正确的提取url的数据
return stock_code

def application(environ, set_response_headers):
status = '200 OK'
response_headers = [('Content-Type', 'text/html')]
set_response_headers(status, response_headers)

file_name = environ['PATH_INFO']
try:
for url, func in g_url_route.items():
print(url)
ret = re.match(url, file_name)
if ret:
return func(file_name, url)
break
else:
return "没有访问的页面--->%s" % file_name

except Exception as ret:
return "%s" % ret

else:
return str(environ) + '-----404--->%s\n'

g_url_route = dict()

字典内存储着路由的映射

key:为正则表达式

value:为请求的信息,包含数据和模板文件

# 用来存放url路由映射
# url_route = {
#   "r'/index.py'":index',
#   "r'/center.py'":center,
#   "r'/update/(\d*)\.html':update
# }

闭包与装饰器实现路由

def route(url):
def set_func(func):
# 添加键值对，key是需要访问的url，value是当这个url需要访问的时候，需要调用的函数引用
g_url_route[url]=func
def call_func(file_name):
return func(file_name)
return call_func
return set_func

装饰器支持正则表达式

@route('正则表达式')

......

@route(r"/update/(\d*)\.html")
def update(file_name, url):

......

application()

函数需要使用正则表达式分析服务器传递过来的请求,并调用相应的函数传递参数和返回值

......

for url, func in g_url_route.items():
ret = re.match(url, file_name)
if ret:
return func(file_name, url)

......

使用正则表达式匹配出的请求信息在数据库中查询动态数据,与模板文件拼接成响应体返回

......

"""
SQL操作
"""
for info in data_from_mysql:
html += html_template
content = re.sub(r"\{%content%\}", html, content)

......

mini-web框架-url编码

导入urllib包

import urllib.parse
# Python3 url编码
print(urllib.parse.quote("天安门"))
# Python3 url解码
print(urllib.parse.unquote("%E5%A4%A9%E5%AE%89%E9%97%A8"))

浏览器url传值默认执行编码操作,所以web框架匹配出的数据需要解码才能使用

......

ret = re.match(url, file_name)
if ret:
stock_code = ret.group(1)
stock_note_info = ret.group(2)
stock_note_info = unquote(stock_note_info)

......