Django中生成随机验证码
1、html中a标签的设置
1 <img src="/get_validcode_img/" alt="">
2、views中的get2、views中的getvalidcode_img设置
导入文件
1 import json
2 import os
3 import random
4 from django.contrib import auth
5 from django.shortcuts import render, redirect, HttpResponse
6 from django.forms import Form
7 from django.forms import fields
8 from django.forms import widgets
9 from django.core.exceptions import ValidationError
10 from django.conf import settings
11 from PIL import Image, ImageDraw, ImageFont
12 from io import BytesIO
方法配置
1 def get_validcode_img(request):
2 color = (random.randint(0, 255), random.randint(0, 255), random.randint(0, 255))
3 # 生成一个颜色随机的大小为160,30的图片
4 img = Image.new(mode="RGB", size=(160, 30), color=(random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)))
5 # 设置图片的绘制颜色
6 draw = ImageDraw.Draw(img, "RGB")
7 # 设置图片的绘制字体（只写字体名，会默认在系统的Fonts下去找）
8 # font_path = os.path.join(settings.BASE_DIR, "static", "font", "kumo.ttf")
9 # font = ImageFont.truetype(font_path, 25)
10 font = ImageFont.truetype(r‘C:WindowsFontsArial.ttf‘, 25)
11 # font = ImageFont.truetype(r‘C:中文kumo.ttf‘, 25) # 中文路径无法识别
12
13 # 设置图片上的字符串
14 valid_list = []
15 for i in range(5):
16 random_num = str(random.randint(0, 9))
17 random_letter_low = chr(random.randint(65, 90))
18 random_letter_upper = chr(random.randint(96, 122))
19 random_char = random.choice([random_num, random_letter_low, random_letter_upper]) # 随机选择字符（数字，大小写字母)
20 # 通过draw.text方法，设置图片上字符串的x,y坐标，字符串，颜色，字体（for循环5次，生成5个字符的验证码)
21 draw.text([5+i*25, 10], random_char, (random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)), font=font)
22 valid_list.append(random_char)
23 # 获取一个内存中的文件句柄
24 f = BytesIO()
25 # 在文件句柄中写入文件
26 img.save(f, ‘png‘)
27 # 取出文件
28 data = f.getvalue()
29 # 转换成字符串
30 valid_str = "".join(valid_list)
31 print(valid_str)
32
33 # 把验证码保存在session中，当用户出入验证码发送请求的时候，把用户输入的数据和session中的验证码做对比
34 request.session["validcode"] = valid_str
35 return HttpResponse(data)
三、 Ajax请求配置
1 $(function(){
2 $("#login_btn").click(function () {
3 var username = $("#username").val();
4 var password = $("#password").val();
5 var validcode = $("#validcode").val();
6
7 $.ajax({
8 url: "/login/",
9 type: "POST",
10 data : {"username":username, "password":password, "validcode":validcode},
11 headers: {"X-CSRFToken": $.cookie("csrftoken")}, //配置csrftoken
12 success: function (data) {
13 console.log(data);
14 var response = JSON.parse(data);
15 if (response["is_login"]){
16 self.location.href = ("/index/")
17 }else{
18 $(".error").html(response["error_msg"]).css("color","red")
19 }
20 }
21 })
22 })
23 })
四、login登录函数配置
1 def login(request):
2 if request.method == "GET":
3 return render(request, "login.html")
4 elif request.method == "POST":
5 print(request.POST)
6 # 1，获取用户输入信息
7 username = request.POST.get("username")
8 password = request.POST.get("password")
9 validcode = request.POST.get("validcode")
10 session_validcode = request.session.get(‘validcode‘)
11 # 设置ajax请求的返回数据
12 login_response = {"is_login": False, "error_msg": None}
13 # 首先验证验证码输入是否正确
14 if validcode.upper() == session_validcode.upper():
15 # 通过auth模块，验证用户名和密码是否正确
16 user = auth.authenticate(username=username, password=password)
17 print(user)
18 if user:
19 # 验证成功则在返回数据中标志True
20 login_response[‘is_login‘] = True
21 # 同时设置用户session
22 auth.login(request, user) # request.session[is_login] = True
23 else:
24 login_response[‘error_msg‘] = "用户名或密码错误"
25 else:
26 login_response[‘error_msg‘] = "验证码错误"
27 print(login_response)
28 return HttpResponse(json.dumps(login_response))