console.py: can now connect to several daemons/wallets

Also throw exceptions instead of print+exit, since that makes
the error print last, below the python stack trace, where it's
much less easy to miss it.

utils/python-rpc/console.py

@@ -5,63 +5,62 @@ import sys
 import subprocess
 import socket
 import urlparse
-from framework import rpc
-from framework import wallet
-from framework import daemon
+import framework.rpc
+import framework.daemon
+import framework.wallet
 
-scheme='http'
-host='127.0.0.1'
-port=None
-
-USAGE = 'usage: python -i console.py [[scheme]<host>:]<port>'
-try:
+USAGE = 'usage: python -i console.py [[[scheme]<host>:]<port> [[[scheme]<host>:]<port>...]]'
+daemons = []
+wallets = []
+rpcs = []
+for n in range(1, len(sys.argv)):
+  scheme='http'
+  host='127.0.0.1'
+  port=None
   try:
-    port = int(sys.argv[1])
-  except:
-    t = urlparse.urlparse(sys.argv[1], allow_fragments = False)
-    scheme = t.scheme or scheme
-    host = t.hostname or host
-    port = t.port or port
-    if scheme != 'http' and scheme != 'https':
-      print(USAGE)
-      sys.exit(1)
-    if port <= 0 or port > 65535:
-      print(USAGE)
-      sys.exit(1)
-except Exception, e:
-  print('Error: ' + str(e))
-  print(USAGE)
-  sys.exit(1)
+    try:
+      port = int(sys.argv[n])
+    except:
+      t = urlparse.urlparse(sys.argv[n], allow_fragments = False)
+      scheme = t.scheme or scheme
+      host = t.hostname or host
+      port = t.port or port
+      if scheme != 'http' and scheme != 'https':
+        raise Exception(USAGE)
+      if port <= 0 or port > 65535:
+        raise Exception(USAGE)
+  except Exception, e:
+    print('Error: ' + str(e))
+    raise Exception(USAGE)
 
-# check for open port
-s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-s.settimeout(1)
-if s.connect_ex((host, port)) != 0:
-  print('No wallet or daemon RPC on port ' + str(port))
-  sys.exit(1)
-s.close()
+  # check for open port
+  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+  s.settimeout(1)
+  if s.connect_ex((host, port)) != 0:
+    raise Exception('No wallet or daemon RPC on port ' + str(port))
+  s.close()
 
-# both wallet and daemon have a get_version JSON RPC
-rpc = rpc.JSONRPC('{protocol}://{host}:{port}'.format(protocol=scheme, host=host, port=port))
-get_version = {
-    'method': 'get_version',
-    'jsonrpc': '2.0', 
-    'id': '0'
-}
-try:
-  res = rpc.send_json_rpc_request(get_version)
-except Exception, e:
-  print('Failed to call version RPC: ' + str(e))
-  sys.exit(1)
+  # both wallet and daemon have a get_version JSON RPC
+  rpc = framework.rpc.JSONRPC('{protocol}://{host}:{port}'.format(protocol=scheme, host=host, port=port))
+  get_version = {
+      'method': 'get_version',
+      'jsonrpc': '2.0', 
+      'id': '0'
+  }
+  try:
+    res = rpc.send_json_rpc_request(get_version)
+  except Exception, e:
+    raise Exception('Failed to call version RPC: ' + str(e))
 
-if 'version' not in res:
-  print('Server is not a monero process')
-  sys.exit(1)
+  if 'version' not in res:
+    raise Exception('Server is not a Monero process')
 
-if 'status' in res:
-  rpc = daemon.Daemon(port=port)
-else:
-  rpc = wallet.Wallet(port=port)
+  if 'status' in res:
+    daemons.append(framework.daemon.Daemon(port=port))
+    rpcs.append(daemons[-1])
+  else:
+    wallets.append(framework.wallet.Wallet(port=port))
+    rpcs.append(wallets[-1])
 
 # add tab completion if we can: https://stackoverflow.com/questions/246725
 try:
@@ -72,5 +71,18 @@ else:
   import rlcompleter
   readline.parse_and_bind('tab: complete')
 
-print('Connected to %s RPC on port %u' % ('daemon' if 'status' in res else 'wallet', port))
-print('The \'rpc\' object may now be used to use the API')
+if len(daemons) == 1:
+  daemon = daemons[0]
+if len(wallets) == 1:
+  wallet = wallets[0]
+
+didx = 0
+widx = 0
+for rpc in rpcs:
+  if type(rpc) == framework.daemon.Daemon:
+    var = "daemon" if len(daemons) == 1 else "daemons[" + str(didx) + "]"
+    didx += 1
+  else:
+    var = "wallet" if len(wallets) == 1 else "wallets[" + str(widx) + "]"
+    widx += 1
+  print('Variable \'%s\' connected to %s RPC on %s:%u' % (var, 'daemon' if type(rpc) == framework.daemon.Daemon else 'wallet', rpc.host ,rpc.port))

utils/python-rpc/framework/daemon.py

@@ -33,6 +33,8 @@ from .rpc import JSONRPC
 class Daemon(object):
 
     def __init__(self, protocol='http', host='127.0.0.1', port=0, idx=0):
+        self.host = host
+        self.port = port
         self.rpc = JSONRPC('{protocol}://{host}:{port}'.format(protocol=protocol, host=host, port=port if port else 18180+idx))
 
     def getblocktemplate(self, address, prev_block = ""):

utils/python-rpc/framework/wallet.py

@@ -33,6 +33,8 @@ from .rpc import JSONRPC
 class Wallet(object):
 
     def __init__(self, protocol='http', host='127.0.0.1', port=0, idx=0):
+        self.host = host
+        self.port = port
         self.rpc = JSONRPC('{protocol}://{host}:{port}'.format(protocol=protocol, host=host, port=port if port else 18090+idx))
 
     def make_uniform_destinations(self, address, transfer_amount, transfer_number_of_destinations=1):