python-denariusrpc

AuthServiceProxy is an improved version of python-jsonrpc.

It includes the following generic improvements:

• HTTP connections persist for the life of the AuthServiceProxy object
• sends protocol 'version', per JSON-RPC 1.1
• sends proper, incrementing 'id'
• uses standard Python json lib
• can optionally log all RPC calls and results
• JSON-2.0 batch support

It also includes the following denarius-specific details:

• sends Basic HTTP authentication headers
• parses all JSON numbers that look like floats as Decimal, and serializes Decimal values to JSON-RPC connections.

Installation

1. git clone https://github.com/buzzkillb/python-denariusrpc
2. cd python-denariusrpc
3. python setup.py install

Note: This will only install denariusrpc. If you also want to install jsonrpc to preserve backwards compatibility, you have to replace 'denariusrpc' with 'jsonrpc' in setup.py and run it again.

Example

from denariusrpc.authproxy import AuthServiceProxy, JSONRPCException

# rpc_user and rpc_password are set in the denarius.conf file
rpc_connection = AuthServiceProxy("http://%s:%s@127.0.0.1:32369"%(rpc_user, rpc_password))
best_block_hash = rpc_connection.getbestblockhash()
print(rpc_connection.getblock(best_block_hash))

# batch support : print timestamps of blocks 0 to 99 in 2 RPC round-trips:
commands = [ [ "getblockhash", height] for height in range(100) ]
block_hashes = rpc_connection.batch_(commands)
blocks = rpc_connection.batch_([ [ "getblock", h ] for h in block_hashes ])
block_times = [ block["time"] for block in blocks ]
print(block_times)

Logging all RPC calls to stderr

from denariusrpc.authproxy import AuthServiceProxy, JSONRPCException
import logging

logging.basicConfig()
logging.getLogger("DenariusRPC").setLevel(logging.DEBUG)

rpc_connection = AuthServiceProxy("http://%s:%s@127.0.0.1:32369"%(rpc_user, rpc_password))
print(rpc_connection.getinfo())

Produces output on stderr like

DEBUG:DenariusRPC:-1-> getinfo [] DEBUG:DenariusRPC:<-1- {"connections": 8, ...etc }

Socket timeouts under heavy load

Pass the timeout argument to prevent "socket timed out" exceptions:

rpc_connection = AuthServiceProxy(
    "http://%s:%s@%s:%s"%(rpc_user, rpc_password, rpc_host, rpc_port),
    timeout=120)