cic-internal-integration/apps/cic-meta/example/client.py

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2021-02-08 18:31:29 +01:00
import sys
import os
import json
import logging
from urllib.request import Request, urlopen
import gnupg
logging.basicConfig(level=logging.DEBUG)
logg = logging.getLogger()
host = os.environ.get('CIC_META_URL', 'http://localhost:63380')
if len(sys.argv) < 2:
sys.stderr.write('Usage: {} <path-to-gpg-private-key>\n'.format(sys.argv[0]))
sys.exit(1)
# Import PGP key used to sign the data submission
gpg = gnupg.GPG(gnupghome='/tmp/.gpg')
f = open(sys.argv[1], 'r')
key_data = f.read()
f.close()
gpg.import_keys(key_data)
gpgk = gpg.list_keys()
algo = gpgk[0]['algo']
logg.info('using signing key {} algo {}'.format(gpgk[0]['keyid'], algo))
def main():
# Random key to associate with value
# (typically this is some deterministic identifier like sha256(<ethaddress>:cic-person)
k = os.urandom(32).hex()
url = os.path.join(host, k)
# Headers required for server-assisted merge operations
headers = {
'X-CIC-AUTOMERGE': 'server',
'Content-Type': 'application/json',
}
# Data to merge
data_dict = {
'foo': 'bar',
'xyzzy': 42,
}
# Send request to server to get initial automerge object and signing material
# Server will reply with current state of object merged with ours, but (obviously)
# still without a signature.
data = json.dumps(data_dict).encode('utf-8')
req = Request(url, headers=headers, data=data, method='POST')
rs = urlopen(req)
logg.info('get sign material response status: {}'.format(rs.status))
if rs.status != 200:
raise RuntimeError('request failed: {}'.format(rs.reason))
# Sign the provided digest
data = rs.read()
e = json.loads(data)
sig = gpg.sign(e['digest'], passphrase='ge', keyid=gpgk[0]['keyid'])
# Format data for the content storage request
data = {
'm': data.decode('utf-8'),
's': {
'engine': 'pgp',
'algo': algo,
'data': str(sig),
'digest': e['digest'],
},
}
# Send storage request to server
data = json.dumps(data).encode('utf-8')
req = Request(url, headers=headers, data=data, method='PUT')
rs = urlopen(req)
logg.info('signed content submissionstatus: {}'.format(rs.status))
if rs.status != 200:
raise RuntimeError('request failed: {}'.format(rs.reason))
# Get the latest stored version of the data (without the merge graph)
req = Request(url, method='GET')
rs = urlopen(req)
logg.info('get latest data status: {}'.format(rs.status))
if rs.status != 200:
raise RuntimeError('request failed: {}'.format(rs.reason))
print(rs.read().decode('utf-8'))
if __name__ == '__main__':
main()