DATABASES = {
  'default': {
    'ENGINE': 'django.db.backends.mysql',
    'NAME': '數(shù)據(jù)庫(kù)名稱',
    'USER': 'root',
    'PASSWORD': '123456',
    'HOST': '10.18.62.2',
    'PORT': '3306',
  }
}

# 登錄驗(yàn)證
def login_ver(request):
  if request.method == 'POST':
    username = request.POST.get('username')
    password = request.POST.get('password')
    '''
    # 用前端輸入的用戶名，密碼去數(shù)據(jù)庫(kù)里找到用戶的信息
    user=數(shù)據(jù)庫(kù)(username,password)
    '''
    # 數(shù)據(jù)庫(kù)中得有一張users表
    user = list(Users.objects.filter(username=username,password=password).values())
    # 用戶信息記錄在session中
    request.session['user'] = user
    # 創(chuàng)建session,否則key為None
    if not request.session.session_key:
      request.session.create()
    # 獲取session_key
      key = request.session.session_key
    # 當(dāng)另一機(jī)器登錄時(shí)，本機(jī)器應(yīng)該被擠下即當(dāng)前sessionkey失效，后登錄的用戶的session可用，之前的sessionkey從數(shù)據(jù)庫(kù)中刪除
    # 獲取指定key的session_data，下面用的ORM模型去數(shù)據(jù)庫(kù)中取數(shù)據(jù)
    session_data = list(DjangoSession.objects.filter(session_key=key).values_list('session_data'))[0][0]
    # 刪除key不為當(dāng)前key，session_data等于當(dāng)前session_data的session記錄，從而達(dá)到一個(gè)賬號(hào)只能一臺(tái)機(jī)器登錄的目的
    models.DjangoSession.objects.filter(session_data=session_data).exclude(session_key=key).delete()

from django.shortcuts import render, redirect

# 設(shè)置cookie
"""
key: cookie的名字
value: cookie對(duì)應(yīng)的值
max_age: cookie過(guò)期的時(shí)間
"""
response.set_cookie(key, value, max_age)
# 為了安全，有時(shí)候我們會(huì)調(diào)用下面的函數(shù)來(lái)給cookie加鹽
response.set_signed_cookie(key,value,salt='加密鹽',...)

# 獲取cookie 
request.COOKIES.get(key)
request.get_signed_cookie(key, salt="加密鹽", default=None)

# 刪除cookie
reponse.delete_cookie(key)

# 編寫裝飾器檢查用戶是否登錄
def check_login(func):
  def inner(request, *args, **kwargs):
    next_url = request.get_full_path()
    # 假設(shè)設(shè)置的cookie的key為login，value為yes
    if request.get_signed_cookie("login", salt="SSS", default=None) == 'yes':
      # 已經(jīng)登錄的用戶，則放行
      return func(request, *args, **kwargs)
    else:
      # 沒有登錄的用戶，跳轉(zhuǎn)到登錄頁(yè)面
      return redirect(f"/login?next={next_url}")

  return inner


# 編寫用戶登錄頁(yè)面的控制函數(shù)
@csrf_exempt
def login(request):
  if request.method == "POST":
    username = request.POST.get("username")
    passwd = request.POST.get("password")
    next_url = request.POST.get("next_url")

    # 對(duì)用戶進(jìn)行驗(yàn)證，假設(shè)用戶名為：aaa, 密碼為123
    if username === 'aaa' and passwd == '123':
      # 執(zhí)行其他邏輯操作，例如保存用戶信息到數(shù)據(jù)庫(kù)等
      # print(f'next_url={next_url}')
      # 登錄成功后跳轉(zhuǎn),否則直接回到主頁(yè)面
      if next_url and next_url != "/logout/":
        response = redirect(next_url)
      else:
        response = redirect("/index/")
      # 若登錄成功，則設(shè)置cookie，加鹽值可自己定義取，這里定義12小時(shí)后cookie過(guò)期
      response.set_signed_cookie("login", 'yes', salt="SSS", max_age=60*60*12)
      return response
    else:
      # 登錄失敗，則返回失敗提示到登錄頁(yè)面
      error_msg = '登錄驗(yàn)證失敗，請(qǐng)重新嘗試'
      return render(request, "app/login.html", {
        'login_error_msg': error_msg,
        'next_url': next_url,
      })
  # 用戶剛進(jìn)入登錄頁(yè)面時(shí)，獲取到跳轉(zhuǎn)鏈接，并保存
  next_url = request.GET.get("next", '')
  return render(request, "app/login.html", {
    'next_url': next_url
  })


# 登出頁(yè)面
def logout(request):
  rep = redirect("/login/")
  # 刪除用戶瀏覽器上之前設(shè)置的cookie
  rep.delete_cookie('login')
  return rep


# 給主頁(yè)添加登錄權(quán)限認(rèn)證
@check_login
def index(request):
  return render(request, "app/index.html")

     <form action="{% url 'login' %}" method="post">
       <h1>請(qǐng)使xx賬戶登錄</h1>
       <div>
        <input id="user" type="text" class="form-control" name="username" placeholder="賬戶" required="" />
       </div>
       <div>
        <input id="pwd" type="password" class="form-control" name="password" placeholder="密碼" required="" />
       </div>
        <div style="display: none;">
          <input id="next" type="text" name="next_url" value="{{ next_url }}" />
        </div>
        {% if login_error_msg %}
          <div id="error-msg">
            <span style="color: rgba(255,53,49,0.8); font-family: cursive;">{{ login_error_msg }}</span>
          </div>
        {% endif %}
       <div>
         <button type="submit" class="btn btn-default" style="float: initial; margin-left: 0px">登錄</button>
       </div>
      </form>

# 設(shè)置session數(shù)據(jù), key是字符串，value可以是任何值
request.session[key] = value
# 獲取 session
request.session.get[key]
# 刪除 session中的某個(gè)數(shù)據(jù)
del request.session[key]
# 清空session中的所有數(shù)據(jù)
request.session.delete()

# 編寫裝飾器檢查用戶是否登錄
def check_login(func):
  def inner(request, *args, **kwargs):
    next_url = request.get_full_path()
    # 獲取session判斷用戶是否已登錄
    if request.session.get('is_login'):
      # 已經(jīng)登錄的用戶...
      return func(request, *args, **kwargs)
    else:
      # 沒有登錄的用戶，跳轉(zhuǎn)剛到登錄頁(yè)面
      return redirect(f"/login?next={next_url}")

  return inner


@csrf_exempt
def login(request):
  if request.method == "POST":
    username = request.POST.get("username")
    passwd = request.POST.get("password")
    next_url = request.POST.get("next_url")
    # 若是有記住密碼功能
    # remember_sign = request.POST.get("check_remember")
    # print(remember_sign)

    # 對(duì)用戶進(jìn)行驗(yàn)證
    if username == 'aaa' and passwd == '123':
      # 進(jìn)行邏輯處理，比如保存用戶與密碼到數(shù)據(jù)庫(kù)

      # 若要使用記住密碼功能，可保存用戶名、密碼到session
      # request.session['user_info'] = {
        # 'username': username,
        # 'password': passwd
      # }
      request.session['is_login'] = True
      # 判斷是否勾選了記住密碼的復(fù)選框
      # if remember_sign == 'on':
      #  request.session['is_remember'] = True
      # else:
        # request.session['is_remember'] = False

      # print(f'next_url={next_url}')
      if next_url and next_url != "/logout/":
        response = redirect(next_url)
      else:
        response = redirect("/index/")
      return response
    else:
      error_msg = '登錄驗(yàn)證失敗，請(qǐng)重新嘗試'
      return render(request, "app/login.html", {
        'login_error_msg': error_msg,
        'next_url': next_url,
      })
  next_url = request.GET.get("next", '')
  # 檢查是否勾選了記住密碼功能
  # password, check_value = '', ''
  # user_session = request.session.get('user_info', {})
  # username = user_session.get('username', '')
  # print(user_session)
  #if request.session.get('is_remember'):
  #  password = user_session.get('password', '')
  #  check_value = 'checked'
  # print(username, password)
  return render(request, "app/login.html", {
    'next_url': next_url,
    # 'user': username,
    # 'password': password,
    # 'check_value': check_value
  })


def logout(request):
  rep = redirect("/login/")
  # request.session.delete()
  # 登出，則刪除掉session中的某條數(shù)據(jù)
  if 'is_login' in request.session:
    del request.session['is_login']
  return rep


@check_login
def index(request):
  return render(request, "autotest/index.html")

      <form action="{% url 'login' %}" method="post">
       <h1>請(qǐng)使xxx賬戶登錄</h1>
       <div>
        <input id="user" type="text" class="form-control" name="username" placeholder="用戶" required="" value="{{ user }}" />
       </div>
       <div>
        <input id="pwd" type="password" class="form-control" name="password" placeholder="密碼" required="" value="{{ password }}" />
       </div>
        <div style="display: none;">
          <input id="next" type="text" name="next_url" value="{{ next_url }}" />
        </div>
        {% if login_error_msg %}
          <div id="error-msg">
            <span style="color: rgba(255,53,49,0.8); font-family: cursive;">{{ login_error_msg }}</span>
          </div>
        {% endif %}
        // 若設(shè)置了記住密碼功能
        // <div style="float: left">
        //   <input id="rmb-me" type="checkbox" name="check_remember" {{ check_value }}/>記住密碼
        // </div>
       <div>
         <button type="submit" class="btn btn-default" style="float: initial; margin-right: 60px">登錄</button>
       </div>
      </form>