def file_download(request):
 # do something...
 with open('file_name.txt') as f:
  c = f.read()
 return HttpResponse(c)

from django.http import StreamingHttpResponse
 
def big_file_download(request):
 # do something...
 
 def file_iterator(file_name, chunk_size=512):
  with open(file_name) as f:
   while True:
    c = f.read(chunk_size)
    if c:
     yield c
    else:
     break
 
 the_file_name = "file_name.txt"
 response = StreamingHttpResponse(file_iterator(the_file_name))
 
 return response

from django.http import StreamingHttpResponse
 
def big_file_download(request):
 # do something...
 
 def file_iterator(file_name, chunk_size=512):
  with open(file_name) as f:
   while True:
    c = f.read(chunk_size)
    if c:
     yield c
    else:
     break
 
 the_file_name = "big_file.pdf"
 response = StreamingHttpResponse(file_iterator(the_file_name))
 response['Content-Type'] = 'application/octet-stream'
 response['Content-Disposition'] = 'attachment;filename="{0}"'.format(the_file_name)
 
 return response

$("body").on("click",".buttonimgdown",function(){
 alert($(".hiddenshiyan").val());
 location.href="/downloadFile/" rel="external nofollow" +$(".hiddenshiyan").val();
});

<form enctype="multipart/form-data" action="./upload" method="post">
<p>File: <input type="file" name="file"></p>
<p><input type="submit" value="Upload"></p>
</form>

def addOnepicture(req):
rollpicturePath=os.path.join(basePath,rollpictureName)
reqfile = req.FILES['picfile']
img = Image.open(reqfile)
img.thumbnail((500,500),Image.ANTIALIAS)#对图片进行等比缩放
img.save(rollpicturePath,"png")#保存图片
T_Picture.objects.create(<u>...</u>)