Add support for serving users' avatars through the Libravatar API

This commit is contained in:
Danielle McLean 2018-03-23 12:56:13 +11:00
parent 6fb289727c
commit 43348a89da
Signed by untrusted user: 00dani
GPG key ID: 5A5D2D1AFF12EEC5
8 changed files with 152 additions and 37 deletions

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@ -47,6 +47,7 @@ django-cors-headers = "*"
pytest-django = "*"
"argon2-cffi" = "*"
python-baseconv = "*"
django-computed-property = "*"
[dev-packages]

88
Pipfile.lock generated
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@ -1,7 +1,7 @@
{
"_meta": {
"hash": {
"sha256": "a824f0af4df1d0088d5dd66db92329358a5cf0095c71f1cb59f6e60583b912f5"
"sha256": "0b68c7a2821e8063bc9d7bae759a9d8dd57785e341e6d23d6421ad93310c7d1b"
},
"host-environment-markers": {
"implementation_name": "cpython",
@ -11,7 +11,7 @@
"platform_python_implementation": "CPython",
"platform_release": "17.5.0",
"platform_system": "Darwin",
"platform_version": "Darwin Kernel Version 17.5.0: Mon Mar 5 22:58:50 PST 2018; root:xnu-4570.51.1~2/RELEASE_X86_64",
"platform_version": "Darwin Kernel Version 17.5.0: Tue Mar 13 20:39:15 PDT 2018; root:xnu-4570.51.1~36/RELEASE_X86_64",
"python_full_version": "3.6.4",
"python_version": "3.6",
"sys_platform": "darwin"
@ -206,6 +206,12 @@
],
"version": "==2.2"
},
"django-computed-property": {
"hashes": [
"sha256:31aa6453a5c504ce196ba9ae3bacbe0557cadf7ae89e25431b90bf206febd3b3"
],
"version": "==0.2.1"
},
"django-cors-headers": {
"hashes": [
"sha256:0e9532628b3aa8806442d4d0b15e56112e6cfbef3735e13401935c98b842a2b4",
@ -323,36 +329,36 @@
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"version": "==4.2.1"
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"markdown": {
"hashes": [
@ -373,6 +379,14 @@
],
"version": "==0.5.0"
},
"more-itertools": {
"hashes": [
"sha256:11a625025954c20145b37ff6309cd54e39ca94f72f6bb9576d1195db6fa2442e",
"sha256:0dd8f72eeab0d2c3bd489025bb2f6a1b8342f9b198f6fc37b52d15cfa4531fea",
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],
"version": "==4.1.0"
},
"msgpack-python": {
"hashes": [
"sha256:378cc8a6d3545b532dfd149da715abae4fda2a3adb6d74e525d0d5e51f46909b"
@ -465,10 +479,10 @@
},
"py": {
"hashes": [
"sha256:8cca5c229d225f8c1e3085be4fcf306090b00850fefad892f9d96c7b6e2f310f",
"sha256:ca18943e28235417756316bfada6cd96b23ce60dd532642690dcfdaba988a76d"
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],
"version": "==1.5.2"
"version": "==1.5.3"
},
"pycparser": {
"hashes": [
@ -506,10 +520,10 @@
},
"pytest": {
"hashes": [
"sha256:062027955bccbc04d2fcd5d79690947e018ba31abe4c90b2c6721abec734261b",
"sha256:117bad36c1a787e1a8a659df35de53ba05f9f3398fb9e4ac17e80ad5903eb8c5"
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],
"version": "==3.4.2"
"version": "==3.5.0"
},
"pytest-django": {
"hashes": [

View file

@ -72,6 +72,7 @@ INSTALLED_APPS = [
'analytical',
'annoying',
'compressor',
'computed_property',
'corsheaders',
'debug_toolbar',
'django_activeurl',

View file

@ -36,6 +36,7 @@ maps = {'sitemaps': sections}
urlpatterns = [
url('', include('home.urls')),
url('', include('entries.urls')),
url('', include('users.urls')),
url('^.well-known/', include('wellknowns.urls')),
url('^admin/', otp_admin_site.urls),
url('^auth/', include('lemonauth.urls')),

View file

@ -0,0 +1,24 @@
# Generated by Django 2.0.3 on 2018-03-23 01:00
import computed_property.fields
from django.db import migrations, models
class Migration(migrations.Migration):
dependencies = [
('users', '0012_auto_20180129_1614'),
]
operations = [
migrations.AddField(
model_name='user',
name='email_md5',
field=computed_property.fields.ComputedCharField(compute_from='calc_email_md5', default='', editable=False, max_length=32, unique=True),
),
migrations.AddField(
model_name='user',
name='email_sha256',
field=computed_property.fields.ComputedCharField(compute_from='calc_email_sha256', default='', editable=False, max_length=64, unique=True),
),
]

View file

@ -1,7 +1,9 @@
from computed_property import ComputedCharField
from django.db import models
from django.contrib.auth.models import AbstractUser, UserManager as DjangoUserManager
from django.contrib.sites.models import Site as DjangoSite
from django.utils.functional import cached_property
from hashlib import md5, sha256
from meta.models import ModelMeta
from urllib.parse import urljoin
from lemoncurry import utils
@ -46,6 +48,21 @@ class User(ModelMeta, AbstractUser):
# This is gonna need to change if I ever decide to add multiple-user support ;)
url = '/'
email_md5 = ComputedCharField(
compute_from='calc_email_md5', max_length=32, unique=True
)
email_sha256 = ComputedCharField(
compute_from='calc_email_sha256', max_length=64, unique=True
)
@property
def calc_email_md5(self):
return md5(self.email.lower().encode('utf-8')).hexdigest()
@property
def calc_email_sha256(self):
return sha256(self.email.lower().encode('utf-8')).hexdigest()
@property
def name(self):
return '{0} {1}'.format(self.first_name, self.last_name)

8
users/urls.py Normal file
View file

@ -0,0 +1,8 @@
from django.conf.urls import url
from .views import libravatar
app_name = 'users'
urlpatterns = (
url('^avatar/(?P<hash>[a-z0-9]+)$', libravatar, name='libravatar'),
)

49
users/views.py Normal file
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@ -0,0 +1,49 @@
from django.http import HttpResponse, HttpResponseRedirect
from PIL import Image
from lemoncurry import utils
from .models import User
def try_libravatar_org(hash, get):
url = 'https://seccdn.libravatar.org/avatar/' + hash
if get:
url += '?' + get.urlencode()
return HttpResponseRedirect(url)
def libravatar(request, hash):
g = request.GET
size = g.get('s', g.get('size', 80))
try:
size = int(size)
except ValueError:
return utils.bad_req('size parameter must be an integer')
if not 1 <= size <= 128:
return utils.bad_req('size parameter must be between 1 and 128')
if len(hash) == 32:
where = {'email_md5': hash}
elif len(hash) == 64:
where = {'email_sha256': hash}
else:
return utils.bad_req('hash must be either md5 or sha256')
# If the user doesn't exist or lacks an avatar, see if libravatar.org has
# one for them - libravatar.org falls back to Gravatar when possible (only
# for MD5 hashes, since Gravatar doesn't support SHA-256), so this ensures
# all the most likely places are checked.
try:
user = User.objects.get(**where)
except User.DoesNotExist:
return try_libravatar_org(hash, g)
if not user.avatar:
return try_libravatar_org(hash, g)
im = Image.open(user.avatar)
im_resized = im.resize((size, size))
response = HttpResponse(content_type='image/'+im.format.lower())
im_resized.save(response, im.format)
return response