首先安裝PIL包
pip install pillow
＿
import random from PIL import Image, ImageDraw, ImageFont, ImageFilter def get_chars_str(): ''' :return:驗證碼字符集合 ''' _letter_cases = "abcdefghjkmnpqrstuvwxy" # 小寫字母，去除可能干擾的i，l，o，z _upper_cases = _letter_cases.upper() # 大寫字母 _numbers = ''.join(map(str, range(3, 10))) # 數字 init_chars = ''.join((_upper_cases, _numbers)) return init_chars def get_random_color(): return (random.randint(1,255),random.randint(1,255),random.randint(1,255)) def create_validate_code(size=(200, 45), chars=get_chars_str(), img_type="gif", mode="RGB", bg_color=(get_random_color()), fg_color=(0, 0, 255), font_size=18, font_type="utils/monaco.ttf", length=5, draw_lines=True, n_line=(2, 4), draw_points=True, point_chance=2): """ @todo: 生成驗證碼圖片 @param size: 圖片的大小，格式（寬，高），預設為(120, 30) @param chars: 允許的字符集合，格式字符串 @param img_type: 圖片保存的格式，預設為GIF，可选的为GIF，JPEG，TIFF，PNG @param mode: 图片模式，默认为RGB @param bg_color: 背景顏色，預設為白色 @param fg_color: 前景色，驗證碼字符顏色，預設為藍色#0000FF @param font_size: 驗證碼字體大小 @param font_type: 驗證碼字體，預設為 ae_AlArabiya.ttf @param length: 驗證碼字符個數 @param draw_lines: 是否畫干擾線 @param n_lines: 干擾線的條數範圍，格式元组，預設為(1, 2)，只有draw_lines为True時有效 @param draw_points: 是否畫干擾點 @param point_chance: 干擾點出現的概率，大小范圍[0, 100] @return: [0]: PIL Image實例 @return: [1]: 驗證碼圖片中的字符串 """ width, height = size # 寬高 # 創建圖形 img = Image.new(mode, size, get_random_color()) draw = ImageDraw.Draw(img) # 創建畫筆 def get_chars(): """生成给定長度的字符串，返回列表格式""" return random.sample(chars, length) def create_lines(): """繪製干擾線""" line_num = random.randint(*n_line) # 干擾線數目 for i in range(line_num): # 起始點 begin = (random.randint(0, size[0]), random.randint(0, size[1])) # 结束點 end = (random.randint(0, size[0]), random.randint(0, size[1])) draw.line([begin, end], fill=(0, 0, 0)) def create_points(): """繪製干擾點""" chance = min(100, max(0, int(point_chance))) # 大小限制在[0, 100] for w in range(width): for h in range(height): tmp = random.randint(0, 100) if tmp > 100 - chance: draw.point((w, h), fill=get_random_color()) def create_strs(): """繪製驗證碼字符""" c_chars = get_chars() strs = ' %s ' % ' '.join(c_chars) # 每個字符前後以空格隔開 font = ImageFont.truetype(font_type, font_size) font_width, font_height = font.getsize(strs) draw.text(((width - font_width) / 3, (height - font_height) / 3), strs, font=font, fill=fg_color) return ''.join(c_chars) if draw_lines: create_lines() if draw_points: create_points() strs = create_strs() # 圖形扭曲參數 params = [1 - float(random.randint(1, 2)) / 100, 0, 0, 0, 1 - float(random.randint(1, 10)) / 100, float(random.randint(1, 2)) / 500, 0.001, float(random.randint(1, 2)) / 500 ] img = img.transform(size, Image.PERSPECTIVE, params) # 創建扭曲 img = img.filter(ImageFilter.EDGE_ENHANCE_MORE) # 濾鏡，邊界加強（閥值更大） return img, strs # img,strs = create_validate_code() # print(img,strs) # img.show()
表單中寫入
<form id="loginform"><input type="text" name="operation" value="login" style="display:none;"/> <div class="form-group"> <label for="user">用戶名</label> <input type="text" name="username" class="form-control" id="username"/> </div> <div class="form-group"> <label for="user">密碼</label> <input type="password" name="password" class="form-control" id="password"/> </div> <div class="form-group"> <label for="user">驗證碼</label> <div class="row"> <div class=col-md-6> <input type="text" name="validcode" class="form-control" id="validcode"/> </div> <div class="col-md-6"> <img src="/crm/validimg/" alt=""> #src寫入要讀取驗證碼的URL </div> <span id="code_err" style="color:red;"></span> </div> </div> <div class="btn btn-primary pull-right" id="login_btn">login</div> </form>
在django urls.py中寫入
from django.urls import path,re_path from app import views urlpatterns = [ re_path(r'crm/validimg/', views.check_code), ]
view.py 寫入一個驗證碼URL使用的函數
def check_code(request): import io stream = io.BytesIO() #創建隨機字符code #創建一張圖片格式的字符串，將隨機字符串寫到圖片上 img, code = ck.create_validate_code() img.save(stream,"png") # 將字符串形式的驗證碼放到頁面中 request.session["CheckCode"] = code # 將驗證碼的字符串寫入session中，給後台驗證用 return HttpResponse(stream.getvalue())
登入的函數
from django.http import JsonResponse from django.contrib import auth #使用django內建的驗證組件 # 建立一個回傳訊息的物件類 class BaseResponse(object): def __init__(self): self.status=True self.error=None self.data=None def login(request): ret = BaseResponse() if request.method == "GET": return render(request,'crm/login.html') elif request.is_ajax(): code = request.POST['validcode'] # 讀取session中的驗證碼數據與輸入的驗證碼做比對 if request.session.get('CheckCode') == code: username = request.POST['username'] password = request.POST['password'] # 驗證使用者帳戶密碼是否正確 user_obj = auth.authenticate(username=username,password=password) if user_obj: #登入成功後，將登入成功訊息寫入session request.session['is_auth'] = True request.session['username'] = user_obj.username else: ret.status = False ret.error = "用戶名或密碼錯誤" else: ret.status = False ret.error = "驗證碼錯誤" # 使用字典物件回傳訊息，在前台接收字典類型的物件 return JsonResponse(ret.__dict__)