使用Django实现用户登录，并记录登录用户的Cookies

用户登录的过程就是拿表单信息和数据库中的信息核对，如果正确就记录下用户的Cookies。

定义登录表单类型

class LoginForm(forms.Form):        username = forms.CharField(label=‘用户名:‘,max_length=30)        password = forms.CharField(label=‘密码:‘,widget=forms.PasswordInput())

判断用户名是否在数据库中

def login_validate(request,username,password):        req_value=False        user = authenticate(username=username,password=password)        if user is not None:                if user.is_active:                        auth_login(request,user)                        return True        return req_value

Views

@csrf_exemptdef login(request):        errors = []           if request.method == ‘POST‘:                form = LoginForm(request.POST)                if form.is_valid():                        data = form.cleaned_data                        username = data[‘username‘]                        password = data[‘password‘]                        if login_validate(request,username,password):                                response = render_to_response(‘index.html‘,{‘username‘:username},RequestContext(request))                                response.set_cookie(‘username‘,username,3600)                                username=request.COOKIES.get(‘username‘,‘‘)                                return response                         else:                                errors.append(‘温馨提示：密码错误，请重新输入！‘)                else:                        errors.append(‘温馨提示：用户名不对，请重新输入！‘)        else:                form = LoginForm()        return render_to_response(‘login.html‘,{‘errors‘:errors,‘form‘:form},RequestContext(request))