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import time
import json
import re
import vt100
auth_re = re.compile(b'^hello ([^ ]+) ([^ ]+)$')
extra_data_re = re.compile(b'\033\[H(\000([^\377]*)\377)\033\[H\033\[2J')
class Handler(object):
def __init__(self, rows, cols):
self.created_at = time.time()
self.idle_since = time.time()
self.rows = rows
self.cols = cols
self.buf = b''
self.vt = vt100.vt100(rows, cols)
def process(self, data):
# XXX this will break if the data is split between reads, but i don't
# know if there's anything we can do about this, because we'll have
# already processed the beginning of it if that happens. we might need
# some better framing which allows us to detect the start of an out of
# band section even when the end hasn't been received yet
extra_data = {}
while True:
m = extra_data_re.search(data)
if m is None:
break
extra_data_json = m.group(2)
extra_data = json.loads(extra_data_json.decode('utf-8'))
data = data[:m.start(1)] + data[m.end(1):]
if "geometry" in extra_data:
self.rows = extra_data["geometry"][1]
self.cols = extra_data["geometry"][0]
self.vt.set_window_size(self.rows, self.cols)
self.buf += data
clear = self.buf.rfind(b"\033[2J")
if clear != -1:
self.buf = self.buf[clear + 4:]
self.vt.process(data)
self.idle_since = time.time()
def get_term(self):
term = ''
for i in range(0, self.rows):
for j in range(0, self.cols):
term += self.vt.cell(i, j).contents()
term += "\n"
return term[:-1]
def total_time(self):
return self._human_readable_duration(time.time() - self.created_at)
def idle_time(self):
return self._human_readable_duration(time.time() - self.idle_since)
def _human_readable_duration(self, duration):
days = 0
hours = 0
minutes = 0
seconds = 0
if duration > 60*60*24:
days = duration // (60*60*24)
duration -= days * 60*60*24
if duration > 60*60:
hours = duration // (60*60)
duration -= hours * 60*60
if duration > 60:
minutes = duration // 60
duration -= minutes * 60
seconds = duration
ret = "%02ds" % seconds
if minutes > 0 or hours > 0 or days > 0:
ret = ("%02dm" % minutes) + ret
if hours > 0 or days > 0:
ret = ("%02dh" % hours) + ret
if days > 0:
ret = ("%dd" % days) + ret
return ret
class Connection(object):
def __init__(self, client, connection_id, publisher):
self.client = client
self.connection_id = connection_id
self.publisher = publisher
def run(self):
buf = b''
while len(buf) < 1024 and b"\n" not in buf:
buf += self.client.recv(1024)
pos = buf.find(b"\n")
if pos == -1:
print("no authentication found")
return
auth = buf[:pos]
if auth[-1:] == b"\r":
auth = auth[:-1]
buf = buf[pos+1:]
m = auth_re.match(auth)
if m is None:
print("no authentication found (%s)" % auth)
return
print(b"got auth: " + auth)
self.name = m.group(1)
self.client.send(b"hello, " + self.name + b"\n")
extra_data = {}
m = extra_data_re.match(buf)
if m is not None:
extra_data_json = m.group(2)
extra_data = json.loads(extra_data_json.decode('utf-8'))
buf = buf[len(m.group(0)):]
if "geometry" in extra_data:
self.handler = Handler(extra_data["geometry"][1], extra_data["geometry"][0])
else:
self.handler = Handler(24, 80)
self.handler.process(buf)
while True:
buf = self.client.recv(1024)
if len(buf) > 0:
self.publisher.notify("new_data", self.connection_id, self.handler.buf, buf)
self.handler.process(buf)
else:
return
def msg_new_viewer(self, connection_id):
if connection_id != self.connection_id:
return
self.publisher.notify("new_data", self.connection_id, self.handler.buf, b'')
self.client.send(b"msg watcher connected\n")
def msg_viewer_disconnect(self, connection_id):
self.client.send(b"msg watcher disconnected\n")
def request_get_streamers(self):
return {
"name": self.name,
"id": self.connection_id,
"rows": self.handler.rows,
"cols": self.handler.cols,
"idle_time": self.handler.idle_time(),
"total_time": self.handler.total_time(),
}
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