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})
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示例代码中将制作缩略图的函数从基于类的视图中分离出来了(为了清晰起见),实际编程过程中可以定义为类方法方面调用。
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/Lockey23/article/details/80659323