一个练习项目，好玩的bbs-python-flask

代码：

from flask import Flask, make_response, request
import os.path
import MySQLdb
import json
import hashlib
import random
import math
import os
from datetime import datetime

app = Flask(__name__)

class DateEncoder(json.JSONEncoder):
    def default(self, obj):
        if isinstance(obj, datetime):
            return obj.strftime("%Y-%m-%d %H:%M:%S")
        else:
            return json.JSONEncoder.default(self, obj)

secretKey = 'saacac3423@21212'
pagesize = 20

def getConn():
    conn = MySQLdb.Connection('127.0.0.1', 'root', '123456', 'my_bbs')
    cursor = conn.cursor(cursorclass = MySQLdb.cursors.DictCursor)
    return (conn, cursor)

def getloginuserinfo(sessionId):
    (conn, cursor) = getConn()
    try:
        sessionIdHead = request.cookies.get("sessionId")
    except:
        sessionIdHead = ''
    
    if sessionIdHead is not None and sessionIdHead != '':
        sessionId = sessionIdHead
        
    sql = "select id,username,nickname,addTime,sessionId from user where sessionId='%s'" % sessionId
    cursor.execute(sql)
    data = cursor.fetchone()
    if data is None:
        data = {'id' : 0, 'username' : '', 'nickname' : '', 'addTime' : '', 'sessionId' : ''}
    
    return data
    
def response(code, msg, data):
    if code != 0:
        result = {'code' : code, 'msg' : msg, 'data' : None}
    else:
        result = {'code' : 0, 'msg' : '', 'data' : data}
        
    result = json.dumps(result, cls = DateEncoder, ensure_ascii = False)
    response = make_response(result)
    response.headers['Server'] = 'flask-Web-Framework'
        
    return response

def error(code, msg):
    return response(code, msg, None)

def success( data = {}):
    return response(0, '', data)
    
@app.route('/')
def index():
    (conn, cursor) = getConn()
    result = "此站接口使用python.flask实现，<a href='api.html' target='_blank'>接口列表</a>"
    response = make_response(result)
    response.headers['Server'] = 'flask-Web-Framework'
    
    return response

@app.route('/user/register')
def register():
    (conn, cursor) = getConn()
    username = request.args.get("username", "")
    password = request.args.get("password", "")
    nickname = request.args.get("nickname", "")
    sql = "select id,username,nickname,addTime from user where username='%s'" % username
    cursor.execute(sql)
    data = cursor.fetchone()
    if data != None:
        return error(1, '用户名已经存在')

    try:
        passwordMd5 = hashlib.md5(password.encode(encoding='utf-8')).hexdigest()
        sql = "insert into user(username, password, nickname) value('%s', '%s', '%s')" % (username, passwordMd5, nickname)
        cursor.execute(sql)
        conn.commit()
        insertId = cursor.lastrowid
        return success(insertId)
    except MySQLdb.Error as e:
        conn.rollback()
        return error(1, '注册失败')

@app.route('/user/login')
def login():
    (conn, cursor) = getConn()
    username = request.args.get("username", "")
    password = request.args.get("password", "")
    passwordMd5 = hashlib.md5(password.encode(encoding='utf-8')).hexdigest()
    sql = "select id,username,nickname,addTime from user where username='%s' and password='%s'" % (username, passwordMd5)
    cursor.execute(sql)
    data = cursor.fetchone()
    if data == None:
        return error(1, '用户名或者密码错误')

    tmpSessionId = secretKey + str(data['id']) + str(data['addTime'])
    tmpSessionId = hashlib.md5(tmpSessionId.encode(encoding='utf-8')).hexdigest()
    try:
        sql = "update user set sessionId='%s' where id=%s" % (tmpSessionId, data['id'])
        cursor.execute(sql)
        conn.commit()
        data['sessionId'] = tmpSessionId
        return success(data)
    except MySQLdb.Error as e:
        conn.rollback()
        return error(1, '保存会话id失败')

@app.route('/user/logout')        
def logout():
    (conn, cursor) = getConn()
    sessionId = request.args.get("sessionId", "")
    data = getloginuserinfo(sessionId)
    
    if data == None:
        return success(None)
    
    if data['sessionId'] == '':
        return success(data)

    try:
        sql = "update user set sessionId='' where sessionId='%s'" % sessionId
        cursor.execute(sql)
        conn.commit()
        data['sessionId'] = ''
        return success(data)
    except MySQLdb.Error as e:
        conn.rollback()
        return error(1, '删除会话id失败')

@app.route('/user/getuserinfo') 
def getuserinfo():
    (conn, cursor) = getConn()
    sessionId = request.args.get("sessionId", "")
    userinfo = getloginuserinfo(sessionId)
    return success(userinfo)
    
@app.route('/post/list')
def postlist():
    (conn, cursor) = getConn()
    page = request.args.get("page", "1")
    keyword = request.args.get("keyword", "")
    page = int(page)
    if page <= 0:
        page = 1
    addsql = " isDel=0 "
    if keyword is not None and keyword != '':
        addsql = " isDel=0 and title like '%"+keyword+"%' "
        
    start = (page - 1) * pagesize
    
    sql1 = "select count(1) as count from content where %s" % addsql
    cursor.execute(sql1)
    countdata = cursor.fetchone()
    totalpage = math.ceil(countdata['count'] / float(pagesize))
    
    data = []
    if totalpage > 0:
        sql2 = "select id,title,userId,userNickename,replyNum,updateTime from content where %s order by updateTime desc limit %s,%s" % (addsql, start, pagesize)
        cursor.execute(sql2)
        data = cursor.fetchall()
    
    return success({'totalpage' : totalpage, 'data' : data})

@app.route('/post/detail')
def postdetail():
    (conn, cursor) = getConn()
    id = request.args.get("id", "0")
    sql = "select id,title,content,userId,userNickename,replyNum,updateTime from content where isDel=0 and id=%s" % id
    cursor.execute(sql)
    data = cursor.fetchone()
    
    return success(data)

@app.route('/post/add')  
def postadd():
    (conn, cursor) = getConn()
    title = request.args.get("title", "")
    content = request.args.get("content", "")
    sessionId = request.args.get("sessionId", "")
    userinfo = getloginuserinfo(sessionId)
    userId = userinfo['id']
    userNickename = userinfo['nickname']
    
    if userId <= 0:
        return error(1, '请先登录')

    try:
        sql = "insert into content(title, content, userId, userNickename) value('%s', '%s', %s, '%s')" % (title, content, userId, userNickename)
        cursor.execute(sql)
        conn.commit()
        insertId = cursor.lastrowid
        return success(insertId)
    except MySQLdb.Error as e:
        conn.rollback()
        return error(1, '发帖失败')

@app.route('/post/edit') 
def postedit():
    (conn, cursor) = getConn()
    id = request.args.get("id", "0")
    title = request.args.get("title", "")
    content = request.args.get("content", "")
    sessionId = request.args.get("sessionId", "")
    userinfo = getloginuserinfo(sessionId)
    userId = userinfo['id']
    userNickename = userinfo['nickname']
    
    if userId <= 0:
        return error(1, '请先登录')

    try:
        sql = "update content set title='%s',content='%s',userId=%s,userNickename='%s' where id=%s and userId=%s" % (title, content, userId, userNickename, id, userId)
        cursor.execute(sql)
        conn.commit()
        return success(None)
    except MySQLdb.Error as e:
        conn.rollback()
        return error(1, '编辑帖子失败')

@app.route('/post/delete') 
def postdelete():
    (conn, cursor) = getConn()
    id = request.args.get("id", "0")
    sessionId = request.args.get("sessionId", "")
    userinfo = getloginuserinfo(sessionId)
    userId = userinfo['id']
    userNickename = userinfo['nickname']
    
    if userId <= 0:
        return error(1, '请先登录')

    try:
        sql = "update content set isDel=1 where id=%s and userId=%s" % (id, userId)
        cursor.execute(sql)
        conn.commit()
        return success(None)
    except MySQLdb.Error as e:
        conn.rollback()
        return error(1, '删除帖子失败')
    
@app.route('/reply/list') 
def replylist():
    (conn, cursor) = getConn()
    page = request.args.get("page", "1")
    contentId = request.args.get("contentId", "0")
    page = int(page)
    if page <= 0:
        page = 1
    start = (page - 1) * pagesize
    
    sql1 = "select count(1) as count from reply where isDel=0 and contentId=%s" % contentId
    cursor.execute(sql1)
    countdata = cursor.fetchone()
    totalpage = math.ceil(countdata['count'] / float(pagesize))
    
    data = []
    if totalpage > 0:
        sql2 = "select id,content,replyUserId,replyUserNickename,addTime from reply where isDel=0 and contentId=%s order by id asc limit %s,%s" % (contentId, start, pagesize)
        cursor.execute(sql2)
        data = cursor.fetchall()
    
    return success({'totalpage' : totalpage, 'data' : data})
    
@app.route('/reply/detail') 
def replydetail():
    (conn, cursor) = getConn()
    id = request.args.get("id", "0")
    sql = "select id,content,replyUserId,replyUserNickename,addTime from reply where isDel=0 and id=%s" % id
    cursor.execute(sql)
    data = cursor.fetchone()
    
    return success(data)
           
@app.route('/reply/add') 
def replyadd():
    (conn, cursor) = getConn()
    contentId = request.args.get("contentId", "0")
    content = request.args.get("content", "")
    sessionId = request.args.get("sessionId", "")
    userinfo = getloginuserinfo(sessionId)
    userId = userinfo['id']
    userNickename = userinfo['nickname']
    
    if userId <= 0:
        return error(1, '请先登录')

    try:
        sql2 = "update content set replyNum=replyNum+1 where id=%s" % contentId
        cursor.execute(sql2)
        sql1 = "insert into reply(contentId, content, replyUserId, replyUserNickename) value(%s, '%s', %s, '%s')" % (contentId, content, userId, userNickename)
        cursor.execute(sql1)
        
        conn.commit()
        insertId = cursor.lastrowid
        return success(insertId)
    except MySQLdb.Error as e:
        conn.rollback()
        return error(1, '回复失败')
    
@app.route('/reply/edit') 
def replyedit():
    (conn, cursor) = getConn()
    id = request.args.get("id", "0")
    content = request.args.get("content", "")
    sessionId = request.args.get("sessionId", "")
    userinfo = getloginuserinfo(sessionId)
    userId = userinfo['id']
    userNickename = userinfo['nickname']
    
    if userId <= 0:
        return error(1, '请先登录')

    try:
        sql = "update reply set content='%s',replyUserId=%s,replyUserNickename='%s' where id=%s and replyUserId=%s" % (content, userId, userNickename, id, userId)
        cursor.execute(sql)
        conn.commit()
        return success(None)
    except MySQLdb.Error as e:
        conn.rollback()
        return error(1, '编辑回复失败')
    
@app.route('/reply/delete') 
def replydelete():
    (conn, cursor) = getConn()
    id = request.args.get("id", "0")
    sessionId = request.args.get("sessionId", "")
    userinfo = getloginuserinfo(sessionId)
    userId = userinfo['id']
    userNickename = userinfo['nickname']
    
    if userId <= 0:
        return error(1, '请先登录')

    sql = "select id,content,replyUserId,replyUserNickename,addTime,contentId from reply where isDel=0 and id=%s" % id
    cursor.execute(sql)
    contentdata = cursor.fetchone()
    
    if contentdata is None:
        return error(1, '回复不存在')

    try:
        sql2 = "update content set replyNum=replyNum-1 where id=%s" % contentdata['contentId']
        cursor.execute(sql2)
        sql1 = "update reply set isDel=1 where id=%s and replyUserId=%s" % (id, userId)
        cursor.execute(sql1)
        
        conn.commit()
        return success(None)
    except MySQLdb.Error as e:
        conn.rollback()
        return error(1, '删除回复失败')

if __name__ == "__main__":
    app.run(port=1089)

 

输出：

D:\workspace\studys\study_pys\pc_app\dist>D:\software\Python310\python.exe D:\workspace\studys\study_bbs\start_web_flask.py
 * Serving Flask app 'start_web_flask'
 * Debug mode: off
WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
 * Running on http://127.0.0.1:1089
Press CTRL+C to quit