#!/usr/bin/env python2
# -*- coding: utf-8 -*-
"""
Blockstack Core
~~~~~
copyright: (c) 2014-2017 by Blockstack Inc.
copyright: (c) 2017 by Blockstack.org
This file is part of Blockstack Core.
Blockstack Core is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Blockstack Core is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Blockstack Core. If not, see .
"""
import re
import json
import collections
import logging
from flask import Flask, make_response, jsonify, abort, request
from flask import Blueprint
from flask_crossdomain import crossdomain
from time import time
from blockstack_proofs import profile_to_proofs, profile_v3_to_proofs
import blockstack_client.profile
import blockstack_client.subdomains
from blockstack_client.schemas import OP_NAME_PATTERN, OP_NAMESPACE_PATTERN
from api.utils import cache_control, get_mc_client
from .config import DEBUG
from .config import DEFAULT_HOST, MEMCACHED_TIMEOUT, MEMCACHED_ENABLED
from .config import USERSTATS_TIMEOUT
from .config import VALID_BLOCKS, RECENT_BLOCKS
from .config import BLOCKSTACKD_IP, BLOCKSTACKD_PORT
from .config import DHT_MIRROR_IP, DHT_MIRROR_PORT
from .config import DEFAULT_NAMESPACE
from .config import NAMES_FILE
import requests
requests.packages.urllib3.disable_warnings()
resolver = Blueprint('resolver', __name__, url_prefix='')
logging.basicConfig()
log = logging.getLogger('resolver')
if DEBUG:
log.setLevel(level=logging.DEBUG)
else:
log.setLevel(level=logging.INFO)
mc = get_mc_client()
# copied and patched from proofs.py
def site_data_to_fixed_proof_url(account, zonefile):
service = account['service']
proof = None
if (service in zonefile and 'proof' in zonefile[service]):
proof = zonefile[service]['proof']
if isinstance(proof, dict):
if 'url' in proof:
proof = proof['url']
elif 'id' in proof and 'username' in zonefile[service]:
username = zonefile[service]['username']
if service == "twitter":
proof = "https://twitter.com/" + username + "/status/" + proof["id"]
elif service == "github":
proof = "https://gist.github.com/" + username + "/" + proof["id"]
elif service == "facebook":
proof = "https://facebook.com/" + username + "/posts/" + proof["id"]
else:
proof = None
if proof:
account['proofUrl'] = proof
def fetch_proofs(profile, username, address, profile_ver=2, zonefile = None):
""" Get proofs for a profile and:
a) check cached entries
b) check which version of profile we're using
"""
if 'account' not in profile:
return []
# fix up missing proofUrls
for account in profile['account']:
if ('proofType' in account and account['proofType'] == 'http'
and 'proofUrl' not in account):
site_data_to_fixed_proof_url(account, zonefile)
if profile_ver == 3:
proofs = profile_v3_to_proofs(profile, username, address = address)
else:
proofs = profile_to_proofs(profile, username, address = address)
return proofs
def is_profile_in_legacy_format(profile):
"""
Is a given profile JSON object in legacy format?
"""
if isinstance(profile, dict):
pass
elif isinstance(profile, (str, unicode)):
try:
profile = json.loads(profile)
except ValueError:
return False
else:
return False
if "@type" in profile:
return False
if "@context" in profile:
return False
is_in_legacy_format = False
if "avatar" in profile:
is_in_legacy_format = True
elif "cover" in profile:
is_in_legacy_format = True
elif "bio" in profile:
is_in_legacy_format = True
elif "twitter" in profile:
is_in_legacy_format = True
elif "facebook" in profile:
is_in_legacy_format = True
return is_in_legacy_format
def format_profile(profile, fqa, zone_file, address, public_key):
""" Process profile data and
1) Insert verifications
2) Check if profile data is valid JSON
"""
data = {'profile' : profile,
'zone_file' : zone_file,
'public_key': public_key,
'owner_address' : address}
if not fqa.endswith('.id'):
data['verifications'] = ["No verifications for non-id namespaces."]
return data
profile_in_legacy_format = is_profile_in_legacy_format(profile)
if not profile_in_legacy_format:
data['verifications'] = fetch_proofs(data['profile'], fqa, address,
profile_ver=3, zonefile=zone_file)
else:
if type(profile) is not dict:
data['profile'] = json.loads(profile)
data['verifications'] = fetch_proofs(data['profile'], fqa, address)
return data
NAME_PATTERN = re.compile(OP_NAME_PATTERN)
NS_PATTERN = re.compile(OP_NAMESPACE_PATTERN)
def is_valid_fqa(fqa):
if (NAME_PATTERN.match(fqa) is None):
return False
try:
username, ns = fqa.split(".")
except:
return False
return (NS_PATTERN.match(ns) is not None)
def get_profile(fqa):
""" Given a fully-qualified username (username.namespace)
get the data associated with that fqu.
Return cached entries, if possible.
"""
profile_expired_grace = False
fqa = fqa.lower()
if not is_valid_fqa(fqa):
fqa = str(fqa)
res = blockstack_client.subdomains.is_address_subdomain(fqa)
if res:
subdomain, domain = res[1]
try:
resp = blockstack_client.subdomains.resolve_subdomain(subdomain, domain)
data = { 'profile' : resp['profile'],
'zone_file': resp['zonefile'],
'public_key': resp.get('public_key', None),
'verifications' : [] }
return data
except blockstack_client.subdomains.SubdomainNotFound as e:
log.exception(e)
abort(404, json.dumps({'error' : 'Name {} not found'.format(fqa)}))
return {'error' : 'Malformed name {}'.format(fqa)}
try:
res = blockstack_client.profile.get_profile(
fqa, use_legacy = True, include_name_record = True)
if 'error' in res:
log.error('Error from profile.get_profile: {}'.format(res['error']))
if "no user record hash defined" in res['error']:
res['status_code'] = 404
if "Failed to load user profile" in res['error']:
res['status_code'] = 404
return res
log.warn(json.dumps(res['name_record']))
profile = res['profile']
zonefile = res['zonefile']
public_key = res.get('public_key', None)
address = res['name_record']['address']
if 'expired' in res['name_record'] and res['name_record']['expired']:
profile_expired_grace = True
except Exception as e:
log.exception(e)
abort(500, json.dumps({'error': 'Server error fetching profile'}))
if profile is None or 'error' in zonefile:
log.error("{}".format(zonefile))
abort(404)
prof_data = {'response' : profile}
data = format_profile(prof_data['response'], fqa, zonefile, address, public_key)
if profile_expired_grace:
data['expired'] = (
'This name has expired! It is still in the renewal grace period, ' +
'but must be renewed or it will eventually expire and be available' +
' for others to register.')
return data
@resolver.route('/v1/users/', methods=['GET'], strict_slashes=False)
@crossdomain(origin='*')
@cache_control(MEMCACHED_TIMEOUT)
def get_users(username):
""" Fetch data from username in .id namespace
"""
reply = {}
if username is None:
reply['error'] = "No username given"
return jsonify(reply), 404
if ',' in username:
reply['error'] = 'Multiple username queries are no longer supported.'
return jsonify(reply), 401
if "." not in username:
fqa = "{}.{}".format(username, 'id')
else:
fqa = username
profile = get_profile(fqa)
reply[username] = profile
if 'error' in profile:
status_code = 502
if 'status_code' in profile:
status_code = profile['status_code']
del profile['status_code']
return jsonify(reply), status_code
else:
return jsonify(reply), 200
@resolver.route('/v2/users/', methods=['GET'], strict_slashes=False)
@crossdomain(origin='*')
@cache_control(MEMCACHED_TIMEOUT)
def get_users_v2(username):
return get_users(username)