Question

mini-web框架-从mysql中查询数据

my_web.py(更新)

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 func1(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 func2(file_name):
            return func(file_name)
        return func2
    return func1


@route("/index.html")
def index(file_name):
    """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()

        # --------添加---------
        # 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()

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

        return content


@route("/center.html")
def center(file_name):
    """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,,,,~~~~(>_<)~~~~ "
        content = re.sub(r"\{%content%\}", data_from_mysql, content)

        return content


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

    file_name = environ['PATH_INFO']
    try:
        return g_url_route[file_name](file_name)
    except Exception as ret:
        return "%s" % ret
    else:
        return str(environ) + '-----404--->%s\n'