openmedialibrary/oml/directory.py

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# -*- coding: utf-8 -*-
# vi:si:et:sw=4:sts=4:ts=4
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# DHT placeholder
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from __future__ import division
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import logging
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import requests
import ed25519
import json
import settings
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logger = logging.getLogger('oml.directory')
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base = settings.server['directory_service']
def get(vk):
id = vk.to_ascii(encoding='base64')
url ='%s/%s' % (base, id)
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headers = {
'User-Agent': settings.USER_AGENT
}
r = requests.get(url, headers=headers)
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sig = r.headers.get('X-Ed25519-Signature')
data = r.content
if sig and data:
vk = ed25519.VerifyingKey(id, encoding='base64')
try:
vk.verify(sig, data, encoding='base64')
data = json.loads(data)
except ed25519.BadSignatureError:
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logger.debug('invalid signature')
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data = None
return data
def put(sk, data):
id = sk.get_verifying_key().to_ascii(encoding='base64')
data = json.dumps(data)
sig = sk.sign(data, encoding='base64')
url ='%s/%s' % (base, id)
headers = {
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'User-Agent': settings.USER_AGENT,
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'X-Ed25519-Signature': sig
}
try:
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r = requests.put(url, data, headers=headers, timeout=2)
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except:
import traceback
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logger.info('directory.put failed: %s', data)
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traceback.print_exc()
return False
return r.status_code == 200