Python/Django后端使用PIL Image生成头像缩略图_Python

Python/Django后端使用PIL Image生成头像缩略图

2021-06-22 00:13Lockeyi Python

这篇文章主要为大家详细介绍了Python/Django后端使用PIL Image生成头像缩略图，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

本文实例为大家分享了python/django后端使用pil image生成头像缩略图的具体代码，供大家参考，具体内容如下

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									import os

									from django.views.generic import view

									from myapp.models import user

									from pil import image

									def make_thumbnail(infile,thumbnail_dir):

									 size = (156, 156)

									 if not os.path.exists(thumbnail_dir):#判断缩略图存储目录是否存在then新建

									 os.mkdir(thumbnail_dir)

									 outfile = os.path.join( thumbnail_dir, os.path.basename(infile))

									 try:

									 im = image.open(infile)#key point

									 im.thumbnail(size)#key point

									 im.save(outfile, "jpeg")#key point

									 return true

									 except ioerror, err:

									 print("cannot create thumbnail for", infile,err)

									 return false

									class useravatar(view):

									 def __init__(self):

									 self.thumbnail_dir = os.path.join(static_root, 'avatar/thumbnails')

									 self.dest_dir = os.path.join(static_root, 'avatar/origin_imgs')

									 @method_decorator(login_required)

									 def post(self, request):

									 nt_id = request.session.get('nt_id', 'default')

									 user = user.objects.get(pk=nt_id) if user.objects.filter(pk=nt_id).exists() else none

									 avatarimg = request.files['avatar']

									 if not os.path.exists(self.dest_dir):#判断原图存储目录是否存在then新建

									  os.mkdir(self.dest_dir)

									 dest = os.path.join(self.dest_dir, nt_id+"_avatar.jpg")

									 with open(dest, "wb+") as destination:#先保存原图

									  for chunk in avatarimg.chunks():

									  destination.write(chunk)

									 if make_thumb(dest,self.thumbnail_dir):#使用原图创建缩略图

									  avartapath = os.path.join(static_url, 'avatar/thumbnails', nt_id + "_avatar.jpg")

									 else:

									  avartapath = os.path.join(static_url, 'avatar/origin_imgs', nt_id + "_avatar.jpg")

									 user.objects.filter(nt_id=nt_id).update(avatar=avartapath)

									 return render(request, 'profile.html', {'user': user})