问题
I have been wracking my brains in this problem. Is there a way in django to serve multiple files from a single HttpResponse?
I have a scenario where i am looping through a list of json and want to return all those as file form my admin view.
class CompanyAdmin(admin.ModelAdmin):
form = CompanyAdminForm
actions = ['export_company_setup']
def export_company_setup(self, request, queryset):
update_count = 0
error_count = 0
company_json_list = []
response_file_list = []
for pb in queryset.all():
try:
# get_company_json_data takes id and returns json for the company.
company_json_list.append(get_company_json_data(pb.pk))
update_count += 1
except:
error_count += 1
# TODO: Get multiple json files from here.
for company in company_json_list:
response = HttpResponse(json.dumps(company), content_type="application/json")
response['Content-Disposition'] = 'attachment; filename=%s.json' % company['name']
return response
#self.message_user(request,("%s company setup extracted and %s company setup extraction failed" % (update_count, error_count)))
#return response
Now this will only let me return/download one json file as return would break the loop. Is there a simpler way to just append all this in a single response object and return that outside loop and download all json in the list in multiple files?
I looked through a way to wrap all these files into a zip file, but i failed to do so as all the examples that i could find had files with path and name which i don't really have in this case.
UPDATE:
I tried to integrate zartch's solution to get a zip file using following:
import StringIO, zipfile
outfile = StringIO.StringIO()
with zipfile.ZipFile(outfile, 'w') as zf:
for company in company_json_list:
zf.writestr("{}.json".format(company['name']), json.dumps(company))
response = HttpResponse(outfile.getvalue(), content_type="application/octet-stream")
response['Content-Disposition'] = 'attachment; filename=%s.zip' % 'company_list'
return response
Since i never had the files to begin with, i thought about just using json dump that i had and adding individual filename. This just creates an empty zipfile. Which i think is expected as i am sure zf.writestr("{}.json".format(company['name']), json.dumps(company))
is not the way to do it. I would appreciate if anyone can help me with this.
回答1:
Maybe if you try to pack all files in one zip you can archive this in Admin
Something like:
def zipFiles(files):
outfile = StringIO() # io.BytesIO() for python 3
with zipfile.ZipFile(outfile, 'w') as zf:
for n, f in enumerate(files):
zf.writestr("{}.csv".format(n), f.getvalue())
return outfile.getvalue()
zipped_file = zip_files(myfiles)
response = HttpResponse(zipped_file, content_type='application/octet-stream')
response['Content-Disposition'] = 'attachment; filename=my_file.zip'
来源:https://stackoverflow.com/questions/42814732/how-to-return-multiple-files-in-httpresponse-django