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cserver.py
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#!/usr/bin/env python3
'''
Causeway Server - key/value storage server geared toward small files with ECSDA signature auth
Usage:
python3 causeway-server.py
'''
from flask import Flask
from flask import request
from flask import abort, url_for
from flask_sqlalchemy import SQLAlchemy
from sqlalchemy import and_
from settings import DATABASE_URI, PRICE, DATA_DIR, SERVER_PORT, DEBUG, TESTNET
import os
import json
import random
import time
import string
import requests
from decimal import Decimal
#from two1.lib.wallet import Wallet
#from two1.lib.bitserv.flask import Payment
from rpc import RPC
from bitcoinecdsa import sign, verify
from monitor import Daemon
from models import *
import bitcoin
if (TESTNET): bitcoin.SelectParams('testnet')
app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = DATABASE_URI
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
db = SQLAlchemy(app)
#wallet = Wallet()
#payment = Payment(app, wallet)
# start time
start_time = time.time()
stored = 0
@app.route('/')
@app.route('/help')
def home():
'''Return service, pricing and endpoint information'''
home_obj = [{"name": "causeway/1.freebeer", # service 'causeway', version '1'
"pricing-type": "per-mb", # pricing is listed per 1000000 bytes
"pricing" : [#{"rpc": "buy",
# "per-req": 0,
# "per-unit": PRICE,
# "description": "1 MB hosting, 50 MB bandwidth, 1 year expiration"
#},
{"rpc": "request",
"per-req": 0,
"per-unit": 0,
"description": "1 MB hosting, 50 MB bandwidth, 1 year expiration - free version for testing"
},
{"rpc": "get",
"per-req": 0,
"per-mb": 0
},
{"rpc": "put",
"per-req": 0,
"per-mb": 0
},
# default
{"rpc": True, # True indicates default
"per-req": 0,
"per-mb": 0
}],
"description": "This Causeway server provides microhosting services."
}
]
body = json.dumps(home_obj, indent=2)
return (body, 200, {'Content-length': len(body),
'Content-type': 'application/json',
}
)
@app.route('/status')
def status():
'''Return general info about server instance. '''
uptime = str(int(time.time() - start_time))
st = os.statvfs(DATA_DIR)
free = st.f_bavail * st.f_frsize
body = json.dumps({'uptime': uptime,
'stored': str(stored),
'free': str(free),
'price': str(PRICE)
}, indent=2
)
return (body, 200, {'Content-length': len(body),
'Content-type': 'application/json',
}
)
@app.route('/price')
def price():
'''Return price for 1MB storage with bundled 50MB transfer.'''
body = json.dumps({'price': 0})
return (body, 200, {'Content-length': len(body),
'Content-type': 'application/json',
}
)
@app.route('/buy')
def buy_hosting():
'''Registers one hosting bucket to account on paid request.'''
# extract account address from client request
owner = request.args.get('owner')
delegate = request.args.get('delegate')
contact = request.args.get('contact')
# check if user exists
o = db.session.query(Owner).get(owner)
if o is None:
# create them
o = Owner(owner, delegate)
db.session.add(o)
db.session.commit()
d = Daemon()
res = d.get_accountaddress(owner)
if 'result' in res and res['result'] == 'success':
address = res['output']['result']
else:
body = json.dumps({'result': 'error',
'message': 'Error getting address. Contact server admin.'}, indent=2)
return (body, 500, {'Content-length': len(body),
'Content-type': 'application/json',
}
)
# check if sale record exists
# if recieved > 0, it will trigger bitcoin-cli to return a new address for this account
# so create a new Sale record
# else we can just update thjis sale record's creation time, price, and receiving address
# the policy here is you must pay with a single payment, if you send a payment and request
# a bucket, you will get a new address
sales = Sale.get_recent(owner)
if len(sales) == 0:
s = Sale(owner, contact, 1, 30, PRICE, address)
db.session.add(s)
db.session.commit()
else:
for s in sales:
if s.price == 0 or Decimal(s.received) > 0.0:
continue
s.created = db.func.current_timestamp()
s.price = PRICE
s.payment_address = address
db.session.commit()
break
body = json.dumps({'result': 'success',
'address': address,
'price': str(PRICE),
'buckets': s.get_buckets()}, indent=2)
return (body, 200, {'Content-length': len(body),
'Content-type': 'application/json',
}
)
@app.route('/request')
def request_hosting():
'''Registers one hosting bucket to account on request (free for testing).'''
# extract account address from client request
owner = request.args.get('owner')
delegate = request.args.get('delegate')
contact = request.args.get('contact')
# check if user exists
o = db.session.query(Owner).filter(Owner.address == owner).first()
print(o)
if o is None:
# create them
o = Owner(owner, delegate)
print(o)
db.session.add(o)
db.session.commit()
count = db.session.query(Sale).filter(and_(Sale.price == 0,
Sale.owner == owner)).count()
if count < 4:
s = Sale(owner, contact, 1, 30, 0)
db.session.add(s)
db.session.commit()
body = json.dumps({'result': 'success',
'buckets': s.get_buckets()}, indent=2)
else:
s = db.session.query(Sale).filter(and_(Sale.price == 0,
Sale.owner == owner)).first()
body = json.dumps({'result': 'error',
'message': 'Maximum free buckets granted',
'buckets': s.get_buckets()}, indent=2)
return (body, 200, {'Content-length': len(body),
'Content-type': 'application/json',
}
)
@app.route('/query', methods=['GET'])
def query():
owner = request.args.get('owner')
string = request.args.get('query')
testnet = request.args.get('testnet')
if testnet == 'True' or testnet == '1' or testnet == 1:
testnet = True
else:
testnet = False
#check if owner has an active sale record or request
sales = db.session.query(Sale).filter(Sale.owner == owner).count()
res = []
if sales == 0:
body = json.dumps({"result": "error",
"message": "Account required to make queries"})
return (body, 200, {'Content-length': len(body),
'Content-type': 'application/json',
}
)
elif string == 'mediators':
mediator_query = Kv.query.filter(and_(Kv.testnet == testnet,
Kv.value.ilike('%\nWilling to mediate: True%'))).paginate(1, 100, False)
mediators = mediator_query.items
for m in mediators:
res.append(m.value)
elif string == 'jobs':
q = Kv.query.filter(and_(Kv.testnet == testnet,
Kv.value.like('%\nRein Job%'))).paginate(1, 100, False)
items = q.items
for i in items:
res.append(i.value)
elif string == 'bids':
q = Kv.query.filter(and_(Kv.testnet == testnet,
Kv.value.like('%\nRein Bid%'))).paginate(1, 100, False)
items = q.items
for i in items:
res.append(i.value)
elif string == 'deliveries':
job_creator = request.args.get('job_creator')
q = Kv.query.filter(and_(Kv.testnet == testnet,
Kv.value.ilike('%Rein Delivery%Job creator public key: '+job_creator+'%'))).paginate(1, 100, False)
items = q.items
for i in items:
res.append(i.value)
elif string == 'in-process':
worker = request.args.get('worker')
q = Kv.query.filter(and_(Kv.testnet == testnet,
Kv.value.ilike('%Worker public key: '+worker+'%'))).paginate(1, 100, False)
items = q.items
for i in items:
res.append(i.value)
elif string == 'review':
mediator = request.args.get('mediator')
q = Kv.query.filter(and_(Kv.testnet == testnet,
Kv.value.ilike('%Mediator public key: '+mediator+'%'))).paginate(1, 100, False)
items = q.items
for i in items:
res.append(i.value)
elif string == 'by_job_id':
job_ids = request.args.get('job_ids')
for job_id in job_ids.split(','):
q = Kv.query.filter(and_(Kv.testnet == testnet,
Kv.value.ilike('%Job ID: '+job_id+'\n%'))).paginate(1, 100, False)
items = q.items
for i in items:
if i is not None:
res.append(i.value)
elif string == 'dispute':
job_ids = request.args.get('job_ids')
for job_id in job_ids.split(','):
last_len = len(res)
print(last_len)
q = Kv.query.filter(Kv.value.ilike('%Rein Delivery%'+job_id+'\n%')).paginate(1, 100, False)
items = q.items
for i in items:
if i is not None:
res.append(i.value)
if len(res) == last_len: #we didn't find a delivery for this job id, look for an offer
q = Kv.query.filter(Kv.value.ilike('%Rein Offer%'+job_id+'\n%')).paginate(1, 100, False)
items = q.items
for i in items:
if i is not None:
res.append(i.value)
print(len(res))
elif string == 'get_user_ratings':
dest = None
source = None
try:
dest = request.args.get('dest')
except: pass
try:
source = request.args.get('source')
except: pass
if not dest and not source:
res.append('error')
else:
q = Kv.query.filter(and_(Kv.testnet == testnet,
Kv.value.like('%\nRein Rating%')))
if dest:
q = q.filter(Kv.value.like('%\nUser msin: {}%'.format(dest)))
if source:
q = q.filter(Kv.value.like('%\nRater msin: {}%'.format(source)))
q = q.paginate(1, 100, False)
items = q.items
for i in items:
res.append({'key': i.key, 'value': i.value})
elif string == 'get_user_name':
msin = request.args.get('msin')
if not msin:
res.append('error')
else:
q = Kv.query.filter(and_(Kv.testnet == testnet,
Kv.value.like('%\nRein User Enrollment%'))).filter(Kv.value.like('%\nSecure Identity Number: {}%'.format(msin))).paginate(1, 100, False)
items = q.items
for i in items:
res.append({'key': i.key, 'value': i.value})
elif string == 'get_user':
search_input = request.args.get('search_input')
if not search_input:
res.append('error')
else:
all_enrollments = Kv.query.filter(and_(
Kv.testnet == testnet,
Kv.value.like('%\nRein User Enrollment%')
))
# Check for SIN matches
q = all_enrollments.filter(
Kv.value.like('%\nSecure Identity Number: {}%'.format(search_input))
).paginate(1, 20, False)
# If unsuccessful, check for master address matches
if not q.items:
q = all_enrollments.filter(
Kv.value.like('%\nMaster signing address: {}%'.format(search_input))
).paginate(1, 20, False)
# If unsuccessful, check for delegate address matches
if not q.items:
q = all_enrollments.filter(
Kv.value.like('%\nDelegate signing address: {}%'.format(search_input))
).paginate(1, 20, False)
# If unsuccessful, check for username, case-insensitive, accepts partial matches
if not q.items:
q = all_enrollments.filter(
Kv.value.ilike('%\nUser: %{}%'.format(search_input))
).paginate(1, 20, False)
# If unsuccessful, check for contact, case-insensitive, accepts partial matches
if not q.items:
q = all_enrollments.filter(
Kv.value.ilike('%\nContact: %{}%'.format(search_input))
).paginate(1, 20, False)
for enrollment in q.items:
res.append(enrollment.value)
block_info = None
if core_enabled:
block_info = get_by_depth(12)
body = json.dumps({"result": "success",
string: res,
"block_info": block_info})
return (body, 200, {'Content-length': len(body),
'Content-type': 'application/json',
}
)
@app.route('/put', methods=['POST'])
def put():
'''Store a key-value pair.'''
# get size of file sent
# Validate JSON body w/ API params
try:
body = request.data.decode('utf-8')
in_obj = json.loads(body)
except:
return ("JSON Decode failed", 400, {'Content-Type':'text/plain'})
k = in_obj['key']
v = in_obj['value']
o = in_obj['owner']
n = in_obj['nonce']
s = in_obj['signature']
d = in_obj['signature_address']
if 'testnet' in in_obj:
testnet = in_obj['testnet']
else:
testnet = False
owner = Owner.query.filter_by(address=o).first()
if owner is None:
body = json.dumps({'error': 'User not found'})
code = 403
elif owner.nonce != n:
body = json.dumps({'error': 'Bad nonce'})
code = 401
elif not verify(d, k + v + d + n, s) :
body = json.dumps({'error': 'Incorrect signature'})
code = 401
else:
size = len(k) + len(v)
# need to also check that we have an enrollment that makes this a delegate of this owner
# check if owner has enough free storage
# get free space from each of owner's buckets
result = db.engine.execute('select * from sale where julianday("now") - \
julianday(sale.created) < sale.term order by sale.created desc')
# choose newest bucket that has enough space
sale_id = None
for row in result:
if (row[7] + size) < (1024 * 1024):
sale_id = row[0]
if sale_id is None: # we couldn't find enough free space
body = json.dumps({'error': 'Insufficient storage space.'})
code = 403
else:
# check if key already exists and is owned by the same owner
kv = db.session.query(Kv).filter(and_(Kv.key == k, Kv.owner == o)).first()
if kv is None:
kv = Kv(k, v, o, sale_id, testnet)
db.session.add(kv)
db.session.commit()
else:
kv.value = v
db.session.commit()
s = db.session.query(Sale).get(sale_id)
s.bytes_used = s.bytes_used + size
db.session.commit()
body = json.dumps({'result': 'success'})
code = 201
return (body, code, {'Content-length': len(body),
'Content-type': 'application/json',
}
)
@app.route('/delete', methods=['POST'])
def delete():
'''Delete a key-value pair.'''
# Validate JSON body w/ API params
try:
body = request.data.decode('utf-8')
in_obj = json.loads(body)
except:
return ("JSON Decode failed", 400, {'Content-Type':'text/plain'})
k = in_obj['key']
d = in_obj['address']
n = in_obj['nonce']
s = in_obj['signature']
# check signature
owner = Owner.query.filter_by(delegate=d).first()
if owner.nonce not in n or verify(o, k + o + n, s):
body = json.dumps({'error': 'Incorrect signature.'})
code = 401
else:
# check if key already exists and is owned by the same owner
kv = db.session.query(Kv).filter_by(key=k).filter_by(owner=o).first()
if kv is None:
body = json.dumps({'error': 'Key not found or not owned by caller.'})
code = 404
else:
# free up storage quota and remove kv
size = len(kv.value)
sale_id = kv.sale
s = db.session.query(Sale).get(sale_id)
s.bytes_used = s.bytes_used - size
db.session.delete(kv)
db.session.commit()
body = json.dumps({'result': 'success'})
code = 200
return (body, code, {'Content-length': len(body),
'Content-type': 'application/json',
}
)
@app.route('/get')
def get():
'''Get a key-value pair.'''
key = request.args.get('key')
kv = Kv.query.filter_by(key=key).first()
if kv is None:
body = json.dumps({'error': 'Key not found.'})
code = 404
else:
body = json.dumps({'key': key, 'value': kv.value})
code = 200
# calculate size and check against quota on kv's sale record
return (body, code, {'Content-length': len(body),
'Content-type': 'application/json',
}
)
@app.route('/nonce')
def nonce():
'''Return 32-byte nonce for generating non-reusable signatures..'''
# check if user exists
o = db.session.query(Owner).get(request.args.get('address'))
if o is None:
return abort(500)
# clear the nonce by sending it to the server
if request.args.get('clear') and request.args.get('clear') == o.nonce:
o.nonce = ''
db.session.commit()
body = json.dumps({'nonce': o.nonce})
# if nonce is set for user return it, else make a new one
elif o.nonce and len(o.nonce) == 32:
body = json.dumps({'nonce': o.nonce})
# if not, create one and store it
else:
print("storing")
n = ''.join(random.SystemRandom().choice(string.hexdigits) for _ in range(32))
o.nonce = n.lower()
db.session.commit()
body = json.dumps({'nonce': o.nonce})
return (body, 200, {'Content-length': len(body),
'Content-type': 'application/json',
}
)
@app.route('/address')
def get_deposit_address():
'''Return new or unused deposit address for on-chain funding.'''
# check if user exists
o = db.session.query(Owner).get(request.args.get('address'))
if o is None:
return abort(500)
address = request.args.get('address')
message = request.args.get('contact') + "," + address
signature = request.args.get('signature')
print(len(signature))
if len(signature) == 88 and verify(address, message, signature):
body = json.dumps({'address': 'hereyago'})
else:
body = json.dumps({'error': 'Invalid signature'})
return (body, 200, {'Content-length': len(body),
'Content-type': 'application/json',
}
)
def has_no_empty_params(rule):
'''Testing rules to identify routes.'''
defaults = rule.defaults if rule.defaults is not None else ()
arguments = rule.arguments if rule.arguments is not None else ()
return len(defaults) >= len(arguments)
@app.route('/info')
def info():
'''Returns list of defined routes.'''
links = []
for rule in app.url_map.iter_rules():
# Filter out rules we can't navigate to in a browser
# and rules that require parameters
if "GET" in rule.methods and has_no_empty_params(rule):
url = url_for(rule.endpoint, **(rule.defaults or {}))
links.append(url)
return json.dumps(links, indent=2)
@app.route('/bitcoin', methods=['GET', 'POST'])
def query_bitcoin():
if not core_enabled:
body = json.dumps({"result": "error",
"message": "Bitcoin Core not enabled for this server"})
return (body, 200, {'Content-length': len(body),
'Content-type': 'application/json',
}
)
rpc = RPC(RPCUSER, RPCPASS, SERVER, RPCPORT)
# to begin, get hash, block height, and time for latest, then n-blocks-ago, or for a block hash
owner = request.args.get('owner')
string = request.args.get('query')
sales = db.session.query(Sale).filter(Sale.owner == owner).count()
res = []
out = {}
if sales == 0:
body = json.dumps({"result": "error",
"message": "Account required to make queries"})
return (body, 200, {'Content-length': len(body),
'Content-type': 'application/json',
}
)
elif string == 'getbydepth':
depth = request.args.get('depth')
res = rpc.get('getblockcount')
if 'output' in res and 'result' in res['output']:
height = res['output']['result'] - int(depth)
elif string == 'getbyheight':
height = request.args.get('height')
elif string == 'getbyhash':
res = rpc.get('getblockheader', [request.args.get('hash')])
height = res['output']['result']['height']
elif string == 'sendrawtransaction':
tx = request.args.get('tx')
res = rpc.get('sendrawtransaction', [str(tx)])
if 'output' in res and 'result' in res['output']:
out['txid'] = res['output']['result']
body = json.dumps(out)
return (body, 200, {'Content-length': len(body), 'Content-type': 'application/json', })
res = rpc.get('getblockhash', [int(height)])
out['height'] = height
if 'output' in res and 'result' in res['output']:
out['hash'] = res['output']['result']
res = rpc.get('getblockheader', [str(out['hash'])])
out['time'] = res['output']['result']['time']
out['height'] = height
body = json.dumps(out)
else:
body = json.dumps({"result": "error",
"message": "Invalid depth or RPC error"})
return (body, 200, {'Content-length': len(body),
'Content-type': 'application/json',
}
)
def get_by_depth(depth):
rpc = RPC(RPCUSER, RPCPASS, SERVER, RPCPORT)
res = rpc.get('getblockcount')
if 'output' in res and 'result' in res['output']:
height = res['output']['result'] - int(depth)
else:
return None
res = rpc.get('getblockhash', [height])
out = {}
if 'output' in res and 'result' in res['output']:
out['hash'] = res['output']['result']
res = rpc.get('getblockheader', [out['hash']])
out['time'] = res['output']['result']['time']
out['height'] = height
return out
if __name__ == '__main__':
if DEBUG:
app.debug = True
rpc = RPC(RPCUSER, RPCPASS, SERVER, RPCPORT)
try:
rpc.get('getblockcount')
core_enabled = CORE_ENABLED
except:
core_enabled = False
print("Core enabled: " + str(core_enabled))
app.run(host='0.0.0.0', port=(os.environ.get('SERVER_PORT', SERVER_PORT)))
#app.run(host='127.0.0.1', port=SERVER_PORT)