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connection.py
205 lines (160 loc) · 6.73 KB
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connection.py
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import wx
import time
import sys
import zlib
from wxasync import StartCoroutine
import asyncio
from window.inputpane import InputPane
from window.outputpane import OutputPane, EVT_ROW_COL_CHANGED
from window.statusbar import StatusBar
from window.debugmcp import DebugMCP
from window.msspinfo import MSSPInfo
from mcp21.core import MCPCore
import prefs
from prefs import EVT_PREFS_CHANGED
import filters.telnetiac
# the 'connection' contains both the network connection and the i/o ui
class Connection(wx.SplitterWindow):
def __init__(self, mainwindow):
wx.SplitterWindow.__init__(self, mainwindow.tabs, style = wx.SP_LIVE_UPDATE)
self.world = None
# these two are set with dns_com_awns_serverinfo but hypothetically
# -could- come from the saved world also
# EDIT: and/or from MSSP, which should also be mashed into the world
self.home_url = ''
self.help_url = ''
self.decompressor = zlib.decompressobj()
# bin for Telnet IAC commands to stash any status info (on/off, etc)
self.features = set()
self.feature_init_callback = {
'MCP' : self.mcp_init_callback,
'MSSP' : self.mssp_init_callback,
}
# re-queue stuff for re-processing (ie if we turn on compression)
self.filter_queue = b''
self.reader = self.writer = None
self.input_pane = InputPane(self, self)
self.output_pane = OutputPane(self, self)
self.status_bar = StatusBar(mainwindow, self)
self.mainwindow = mainwindow
self.SplitHorizontally(self.output_pane, self.input_pane)
self.SetMinimumPaneSize(self.input_pane.font_size()[1] * 2)
self.Bind(wx.EVT_SPLITTER_SASH_POS_CHANGED, self.saveSplitterSize )
self.Bind(wx.EVT_SIZE, self.OnSize)
self.output_pane.Bind(EVT_ROW_COL_CHANGED , self.on_row_col_changed )
mainwindow.Bind(EVT_PREFS_CHANGED, self.doPrefsChanged)
def doPrefsChanged(self, evt):
self.input_pane.restyle_thyself()
self.output_pane.restyle_thyself()
evt.Skip()
def saveSplitterSize(self, evt):
size = self.GetSize()
prefs.set('input_height', size.GetHeight() - evt.GetSashPosition())
evt.Skip()
def OnSize(self, evt):
size = self.GetSize()
input_height = int(prefs.get('input_height')) or 25
self.SetSashPosition(size.GetHeight() - input_height, True)
self.output_pane.ScrollIfAppropriate()
evt.Skip()
def on_row_col_changed(self, evt):
# This is sorta icky but math is hard
filters.telnetiac.handle_naws(self)
def ActivateFeature(self, feature, on = True):
if on:
self.features.add(feature)
if self.feature_init_callback.get(feature):
self.feature_init_callback[feature]()
else:
self.features.discard(feature)
self.UpdateStatus()
def SetTitle(self, text):
tabindex = self.mainwindow.tabs.GetPageIndex(self)
self.mainwindow.tabs.SetPageText(tabindex, text)
def UpdateStatus(self):
self.status_bar.LayoutWidgets()
def UpdateIcon(self, icon, message):
icon = self.status_bar.feature_icons.get(icon)
if icon: icon.SetToolTip(message)
def ShowMessage(self, message):
self.status_bar.AddStatus(message)
def IsCurrentConnection(self):
return self.mainwindow.currentConnection() == self
def Close(self):
if self.is_connected():
self.output_pane.display("=== wxpymoo: Connection closed. ===\n");
if self.writer: self.writer.close()
self.filter_queue = b''
self.features.clear()
self.connect_time = self.reader = self.writer = None
# TODO - we need to cram charset into worlds more deterministically
def charset(self):
return self.world.get('charset', 'latin1') if self.world else 'latin1'
# connection.connect ([host], [port])
#
# existing connections will remember their host and port if not supplied here,
# for ease of reconnect etc.
def connect(self, world):
self.world = world
self.connect_time = None
StartCoroutine(self._connect, self)
async def _connect(self):
world = self.world
host = world.get('host')
port = int(world.get('port'))
conntype = world.get('conntype')
try:
wx.BeginBusyCursor()
self.reader, self.writer = await asyncio.wait_for(
asyncio.open_connection(host, port, ssl = (conntype == "SSL")),
timeout = 15)
except Exception as inst:
self.Close()
message = "Connection error: " + str(inst)
if inst.__class__ == asyncio.TimeoutError:
message = "Connection to " + host + ":" + str(port) + " timed out."
else:
print("DEBUG: Connection Exception " + str(inst.__class__) + " " + str(inst))
wx.MessageDialog(self, message, "Error", style = wx.OK|wx.ICON_ERROR).ShowModal()
return
finally:
wx.EndBusyCursor()
if conntype == "SSL":
self.ActivateFeature('SSL')
self.connect_time = time.time()
prefs.set('last_world', world.get('name'))
self.mcp = MCPCore(self)
if self.world.get('auto_login'):
login_script = self.world.get('login_script')
if login_script:
login_script = re.sub('%u', self.world.get('username', ''), login_script)
login_script = re.sub('%p', self.world.get('password', ''), login_script)
self.output(login_script + "\n")
while True:
data = await self.reader.read(65535)
if not data: break
if self.filter_queue:
data = self.filter_queue + data
self.filter_queue = b''
# Do the initial telnet filtering here, while we're still in 'bytes' mode
data = filters.telnetiac.process_line(self, data)
if not data: continue
data = data.decode(self.charset())
self.output_pane.display(data)
def output(self, stuff):
if isinstance(stuff, str):
stuff = bytes(stuff, self.charset())
if self.writer:
self.writer.write(stuff)
else:
print(f"Tried to write stuff to closed writer: {stuff}")
def reconnect(self):
if self.writer: self.Close()
self.connect(self.world)
def is_connected(self):
return True if self.writer else False
### feature init callbacks
def mcp_init_callback(self):
self.debug_mcp = DebugMCP(self.mainwindow, self)
def mssp_init_callback(self):
self.mssp_info = MSSPInfo(self)