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import hashlib
from django.conf import settings
from .compat import urlencode, urlopen, Request, HTTPError, URLError
# These options can be used to change the default image if no gravatar is found
GRAVATAR_DEFAULT_IMAGE_404 = '404'
GRAVATAR_DEFAULT_IMAGE_MYSTERY_MAN = 'mm'
GRAVATAR_DEFAULT_IMAGE_IDENTICON = 'identicon'
GRAVATAR_DEFAULT_IMAGE_MONSTER = 'monsterid'
GRAVATAR_DEFAULT_IMAGE_WAVATAR = 'wavatar'
GRAVATAR_DEFAULT_IMAGE_RETRO = 'retro'
# These options can be used to restrict gravatar content
GRAVATAR_RATING_G = 'g'
GRAVATAR_RATING_PG = 'pg'
GRAVATAR_RATING_R = 'r'
GRAVATAR_RATING_X = 'x'
# Get Gravatar base url from settings.py
GRAVATAR_URL = getattr(settings, 'GRAVATAR_URL', 'http://www.gravatar.com/')
GRAVATAR_SECURE_URL = getattr(
settings,
'GRAVATAR_SECURE_URL',
'https://secure.gravatar.com/',
)
# Get user defaults from settings.py
GRAVATAR_DEFAULT_SIZE = getattr(settings, 'GRAVATAR_DEFAULT_SIZE', 80)
GRAVATAR_DEFAULT_IMAGE = getattr(
settings,
'GRAVATAR_DEFAULT_IMAGE',
GRAVATAR_DEFAULT_IMAGE_MYSTERY_MAN,
)
GRAVATAR_DEFAULT_RATING = getattr(
settings,
'GRAVATAR_DEFAULT_RATING',
GRAVATAR_RATING_G,
)
GRAVATAR_DEFAULT_SECURE = getattr(
settings,
'GRAVATAR_DEFAULT_SECURE',
True,
)
def calculate_gravatar_hash(email):
# Calculate the email hash
enc_email = email.strip().lower().encode("utf-8")
email_hash = hashlib.md5(enc_email).hexdigest()
return email_hash
def get_gravatar_url(email,
size=GRAVATAR_DEFAULT_SIZE,
default=GRAVATAR_DEFAULT_IMAGE,
rating=GRAVATAR_DEFAULT_RATING,
secure=GRAVATAR_DEFAULT_SECURE,
):
"""
Builds a url to a gravatar from an email address.
:param email: The email to fetch the gravatar for
:param size: The size (in pixels) of the gravatar to fetch
:param default: What type of default image to use if the gravatar does not
exist
:param rating: Used to filter the allowed gravatar ratings
:param secure: If True use https, otherwise plain http
"""
if secure:
url_base = GRAVATAR_SECURE_URL
else:
url_base = GRAVATAR_URL
# Calculate the email hash
email_hash = calculate_gravatar_hash(email)
# Build querystring
query_string = urlencode({
's': str(size),
'd': default,
'r': rating,
})
# Build url
url = '{base}avatar/{hash}.jpg?{qs}'.format(
base=url_base,
hash=email_hash,
qs=query_string,
)
return url
def has_gravatar(email):
"""
Returns True if the user has a gravatar, False if otherwise
"""
# Request a 404 response if the gravatar does not exist
url = get_gravatar_url(email, default=GRAVATAR_DEFAULT_IMAGE_404)
# Verify an OK response was received
try:
request = Request(url)
request.get_method = lambda: 'HEAD'
return 200 == urlopen(request).code
except (HTTPError, URLError):
return False
def get_gravatar_profile_url(email, secure=GRAVATAR_DEFAULT_SECURE):
"""
Builds a url to a gravatar profile from an email address.
:param email: The email to fetch the gravatar for
:param secure: If True use https, otherwise plain http
"""
if secure:
url_base = GRAVATAR_SECURE_URL
else:
url_base = GRAVATAR_URL
# Calculate the email hash
email_hash = calculate_gravatar_hash(email)
# Build url
url = '{base}{hash}'.format(base=url_base, hash=email_hash)
return url
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