初学Python时的练习代码.zip

from django.shortcuts import render,redirect from user.models import * from hashlib import * from django.http import * from django.template import loader,RequestContext from django.core.urlresolvers import reverse from datetime import timedelta from django.views.decorators.csrf import csrf_exempt from PIL import Image, ImageDraw, ImageFont, ImageFilter from io import StringIO,BytesIO import random import uuid import os from time import sleep from django.conf import settings from booktest.models import * from user import task # Create your views here. def register(request): return render(request, 'user/register.html') def register_handler(request): user = User() user.uname = request.POST.get('username') user.upwd = sha1(request.POST.get('userpwd').encode('utf-8')).hexdigest() user.save() return render(request, 'user/success.html') def login(request): print('session:%s'%request.session.get('currentUser')) context = {} #获取cookie username = request.COOKIES.get('mycooki') if username: context['username']=username return render(request, 'user/login.html',context) #@csrf_exempt def login_handler(request): # 定义上下文 context = {} #获取验证码 userverification = request.POST.get('userverification') if userverification==None or request.session['codes'].upper() != userverification.upper(): context = {'userverification_error':'验证码输入错误'} return render(request,'user/login.html',context) #用户名密码 username = request.POST.get('username') userpwd = sha1(request.POST.get('userpwd').encode('utf-8')).hexdigest() #匹配 ret = User.objects.filter(uname=username,upwd=userpwd) if len(ret)==0: return HttpResponseRedirect('/user/login') else: #在服务端保持一个session键值对 request.session['currentUser'] = username request.session.set_expiry(36000) #request.session.set_expiry(timedelta(days=2)) #加载模板 t1 = loader.get_template('user/success.html') #上下文 requestcontext = RequestContext(request,context) #创建具有模板和上下文的reponse response = HttpResponse(t1.render(requestcontext)) #记录用户名密码的变量 rememberName = request.POST.get('rememberName') #判断 if rememberName=='1': #写cookie response.set_cookie('mycookie',username,max_age=3600) return response def verification(request): # 240 x 60: width = 60 * 4 height = 60 image = Image.new('RGB', (width, height), (255, 255, 255)) # 创建Font对象: font = ImageFont.truetype('/usr/share/fonts/truetype/liberation/LiberationSerif-BoldItalic.ttf', 36) # 创建Draw对象: draw = ImageDraw.Draw(image) # 填充每个像素: for x in range(width): for y in range(height): draw.point((x, y), fill=rndColor()) #储存验证码字符串 codes = '' # 输出文字: for t in range(4): code = rndChar() codes += code draw.text((60 * t + 10, 10),code , font=font, fill=rndColor2()) # 模糊: image = image.filter(ImageFilter.BLUR) #将验证码字符串存储到session中 request.session['codes'] = codes request.session.set_expiry(0) #内存级的字节读写 f = BytesIO() image.save(f,'jpeg') return HttpResponse(f.getvalue(),'image/jpeg') def check_username(request): username = request.GET.get('username') # 0不存在 1存在 ret = '0' if len(User.objects.filter(uname=username)): ret = '1' return HttpResponse(ret) # 随机字母: def rndChar(): return chr(random.randint(65, 90)) # 随机颜色1: def rndColor(): return (random.randint(64, 255), random.randint(64, 255), random.randint(64, 255)) # 随机颜色2: def rndColor2(): return (random.randint(32, 127), random.randint(32, 127), random.randint(32, 127)) def test1(request): return render(request, 'user/test1.html') def test3(request): return render(request, 'user/test3.html') def test4(request): id = request.GET.get('id') name = request.GET.get('name') print('id=%s,name=%s'%(id,name)) sleep(3) return HttpResponse('ok') def test2(request): #接收上传的文件 file = request.FILES.get('myfile',None) #判断 if file: #文件的新名字 name = doFileName(file.name) #拼接路径 path = os.path.join(settings.MEDIA_ROOT,'images',name) #读写文件 with open(path,'wb') as f: for chunk in file.chunks(): f.write(chunk) #接收其他字段，+name 存到数据库中 #文件的存放策略 else: pass return render(request, 'user/success.html') #load def test5(request): return render(request, 'user/test5.html') def test6(request): return render(request, 'user/test6.html') def test7(request): return render(request, 'user/test7.html') def test8(request): #模拟耗时的操作 task.hello_world.delay() #task.hello_world() return render(request, 'user/test8.html') from django.views.decorators.cache import cache_page @cache_page(20) def test9(request): return HttpResponse('test099999') #return HttpResponse('test09') def test10(request): return render(request, 'user/test10.html') from django.core.cache import cache def test11(request): cache.set('mykey','myvalue',1000) return render(request, 'user/test11.html') def test12(request): return HttpResponse(cache.get('mykey'))