lemoncurry/micropub/views/media.py

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import hashlib
from django.core.files.storage import default_storage as store
from django.http import HttpResponse
from django.views.decorators.csrf import csrf_exempt
from django.views.decorators.http import require_POST
import magic
from lemonauth import tokens
from lemoncurry.utils import absolute_url
from .. import error
ACCEPTED_MEDIA_TYPES = (
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"image/gif",
"image/jpeg",
"image/png",
)
@csrf_exempt
@require_POST
def media(request):
token = tokens.auth(request)
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if "file" not in request.FILES:
raise error.bad_req(
"a file named 'file' must be provided to the media endpoint"
)
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file = request.FILES["file"]
if file.content_type not in ACCEPTED_MEDIA_TYPES:
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raise error.bad_req("unacceptable file type {0}".format(file.content_type))
mime = None
sha = hashlib.sha256()
for chunk in file.chunks():
if mime is None:
mime = magic.from_buffer(chunk, mime=True)
sha.update(chunk)
if mime != file.content_type:
raise error.bad_req(
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"detected file type {0} did not match specified file type {1}".format(
mime, file.content_type
)
)
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path = "mp/{0[0]}/{2}.{1}".format(*mime.split("/"), sha.hexdigest())
path = store.save(path, file)
url = absolute_url(request, store.url(path))
res = HttpResponse(status=201)
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res["Location"] = url
return res