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# Copyright 2015, 2016 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from pydenticon import Generator
from twisted.web.resource import Resource
from synapse.http.servlet import parse_integer
FOREGROUND = [
"rgb(45,79,255)",
"rgb(254,180,44)",
"rgb(226,121,234)",
"rgb(30,179,253)",
"rgb(232,77,65)",
"rgb(49,203,115)",
"rgb(141,69,170)"
]
BACKGROUND = "rgb(224,224,224)"
SIZE = 5
class IdenticonResource(Resource):
isLeaf = True
def __init__(self):
Resource.__init__(self)
self.generator = Generator(
SIZE, SIZE, foreground=FOREGROUND, background=BACKGROUND,
)
def generate_identicon(self, name, width, height):
v_padding = width % SIZE
h_padding = height % SIZE
top_padding = v_padding // 2
left_padding = h_padding // 2
bottom_padding = v_padding - top_padding
right_padding = h_padding - left_padding
width -= v_padding
height -= h_padding
padding = (top_padding, bottom_padding, left_padding, right_padding)
identicon = self.generator.generate(
name, width, height, padding=padding
)
return identicon
def render_GET(self, request):
name = "/".join(request.postpath)
width = parse_integer(request, "width", default=96)
height = parse_integer(request, "height", default=96)
identicon_bytes = self.generate_identicon(name, width, height)
request.setHeader(b"Content-Type", b"image/png")
request.setHeader(
b"Cache-Control", b"public,max-age=86400,s-maxage=86400"
)
return identicon_bytes
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