驗證碼django_simple_captcha | Django

# 1.settings.py
    INSTALLED_APPS = (  
        'captcha',  
    )  
    # django_simple_captcha 驗證碼配置   
    # 格式  
    CAPTCHA_OUTPUT_FORMAT = u'%(text_field)s %(hidden_field)s %(image)s'  
    # 噪點樣式  
    CAPTCHA_NOISE_FUNCTIONS = ('captcha.helpers.noise_null', # 沒有樣式  
        # 'captcha.helpers.noise_arcs', # 線  
        # 'captcha.helpers.noise_dots', # 點  
    )  
    # 圖片大小  
    CAPTCHA_IMAGE_SIZE = (100, 25)  
    CAPTCHA_BACKGROUND_COLOR = '#ffffff'  
    CAPTCHA_CHALLENGE_FUNCT = 'captcha.helpers.random_char_challenge' # 圖片中的文字為隨機英文字母，如 mdsh  
    # CAPTCHA_CHALLENGE_FUNCT = 'captcha.helpers.math_challenge'    # 圖片中的文字為數字表達式，如1+2=</span>  
      
    CAPTCHA_LENGTH = 4 # 字符個數  
    CAPTCHA_TIMEOUT = 1 # 超時(minutes)  

# 2.forms.py
    from django import forms  
    from maiziedu.models import UserProfile  
    from captcha.fields import CaptchaField  
      
    class RegisterForm(forms.Form):  
        ''''' 
        注冊 
        '''  
        username = forms.EmailField(widget=forms.TextInput(attrs={"class": "form-control", "placeholder": "請輸入郵箱賬號", "value": "", "required": "required",}),  
                                  max_length=50,error_messages={"required": "用戶名不能為空",})  
        password = forms.CharField(widget=forms.PasswordInput(attrs={"class": "form-control", "placeholder": "請輸入密碼", "value": "", "required": "required",}),  
                                  min_length=8, max_length=50,error_messages={"required": "密碼不能為空",})  
        # 驗證碼  
        captcha = CaptchaField()  
      
        def clean(self):  
              
            # 驗證碼  
            try:              
                captcha_x = self.cleaned_data['captcha']              
            except Exception as e:  
                print 'except: '+ str(e)  
                raise forms.ValidationError(u"驗證碼有誤，請重新輸入")  
      
      
             # 用戶名  
            try:            
                username=self.cleaned_data['username']  
            except Exception as e:  
                print 'except: '+ str(e)  
                raise forms.ValidationError(u"注冊賬號需為郵箱格式")      
      
      
            # 登錄驗證          
            is_email_exist = UserProfile.objects.filter(email=username).exists()   
            is_username_exist = UserProfile.objects.filter(username=username).exists()   
            if is_username_exist or is_email_exist:  
                raise forms.ValidationError(u"該賬號已被注冊")  
      
      
            # 密碼  
            try:  
                password=self.cleaned_data['password']  
            except Exception as e:  
                print 'except: '+ str(e)  
                raise forms.ValidationError(u"請輸入至少8位密碼");  
      
      
            return self.cleaned_data  
# 3.views.py
    # 注冊  
    # 改為ajax post   
    def register(request):  
        if request.method == 'POST':  
            # 驗證碼  
            print 'captcha_0: ' + request.POST.get('captcha_0')  
            print 'captcha_1: ' + request.POST.get('captcha_1')  
            try:  
                reg_form = RegisterForm(request.POST)  
            except Exception as e:  
                print str(e)  
                # 登錄失敗 返回錯誤提示      
                err = "注冊失敗，請重試"  
                return result_response(request, err)   
      
            if reg_form.is_valid():  
                print "register success"  
                try:  
                    username = reg_form.cleaned_data['username']  
                    password = reg_form.cleaned_data['password']  
                    user = UserProfile.objects.create(username = username, email = username,   
                      password = make_password(password), is_active = True)  
                    user.save()  
                    user.backend = 'django.contrib.auth.backends.ModelBackend' # 指定默認的登錄驗證方式  
                    # 驗證成功登錄  
                    auth.login(request, user)  
                    return result_response(request, "")  
                except Exception as e:  
                    print str(e)  
                    setFormTips(reg_form, "注冊失敗，請重試")  
            else:  
                print "register failed"  
      
                if request.POST.get('captcha_1') == "":  
                    setFormTips(reg_form, "驗證碼不能為空")   
      
            # 登錄失敗 返回錯誤提示      
            err = getFormTips(reg_form)  
            return result_response(request, err)   
        else:  
            reg_form = RegisterForm()  
          
        return render(request, 'index.html', locals())  

# 4.index.html
    ①第一種
        {{ reg_form.captcha }}  
        # 這種方法對頁面的適應性不太好，如上面模板變量生成html如下：
            <input autocomplete="off" id="id_captcha_1" name="captcha_1" type="text">  
            <input id="id_captcha_0" name="captcha_0" type="hidden" value="e91228ab45df7338b59b64cb0eae1b60a48fd125">  
            <img src="/%2Fimage/e91228ab45df7338b59b64cb0eae1b60a48fd125/" alt="captcha" class="captcha">  
    ②第二種
    # views.py
        from captcha.models import CaptchaStore  
        from captcha.helpers import captcha_image_url  
        hashkey = CaptchaStore.generate_key()  
        imgage_url = captcha_image_url(hashkey) 
    # index.html
        <input type="text"  id="id_reg_captcha_1" name="captcha_1" class="form-control form-control-captcha fl" placeholder="請輸入驗證碼"><span class="v5-yzm fr"><a href="#" class="next-captcha"><img src="{{ imgage_url }}" class="captcha" alt="captcha">換一張</a></span>
        <input id="id_reg_captcha_0" name="captcha_0" type="hidden" value="{{ hashkey }}">