def setup_server_io(io_db):
"""Fill IO files DB with proper file( path)s. Write process IO test string.
- Decide file paths. Ensure IO files directory at server/. Remove any old in
- file if found. Set up new in file (io_db["file_in"]) for reading at
- io_db["path_in"], and new out file (io_db["file_out"]) for writing at
- io_db["path_out"]. Start out file with process hash line of format PID +
- " " + floated UNIX time (io_db["teststring"]).
+ Set io_db["kicked_by_rival"] to False. Decide file paths. Ensure IO files
+ directory at server/. Remove any old in file if found. Set up new in file
+ (io_db["file_in"]) for reading at io_db["path_in"], and new out file
+ (io_db["file_out"]) for writing at io_db["path_out"]. Start out file with
+ process hash line of format PID + " " + floated UNIX time
+ (io_db["teststring"]). Run detect_atomic_leftover on io_db["path_record"]
+ and io_db["path_save"].
"""
io_dir = "server/"
+ io_db["kicked_by_rival"] = False
io_db["path_in"] = io_dir + "in"
io_db["path_out"] = io_dir + "out"
io_db["path_worldstate"] = io_dir + "worldstate"
os.makedirs(io_dir, exist_ok=True)
io_db["file_out"] = open(io_db["path_out"], "w")
io_db["file_out"].write(io_db["teststring"] + "\n")
+ io_db["file_out"].flush()
if os.access(io_db["path_in"], os.F_OK):
os.remove(io_db["path_in"])
io_db["file_in"] = open(io_db["path_in"], "w")
io_db["file_in"].close()
io_db["file_in"] = open(io_db["path_in"], "r")
+ detect_atomic_leftover(io_db["path_save"], io_db["tmp_suffix"])
+ detect_atomic_leftover(io_db["path_record"], io_db["tmp_suffix"])
def cleanup_server_io(io_db):
- """Close and remove all files open in IO files DB."""
+ """Close and (if io_db["kicked_by_rival"] false) remove files in io_db."""
def helper(file_key, path_key):
if file_key in io_db:
io_db[file_key].close()
- os.remove(io_db[path_key])
+ if not io_db["kicked_by_rival"] \
+ and os.access(io_db[path_key], os.F_OK):
+ os.remove(io_db[path_key])
helper("file_out", "path_out")
helper("file_in", "path_in")
helper("file_worldstate", "path_worldstate")
raise SystemExit(msg)
-def obey(cmd, io_db, prefix):
+def obey(cmd, io_db, prefix, replay_file=None, do_record=False):
""""""
+ server_test(io_db)
print("input " + prefix + ": " + cmd)
try:
tokens = shlex.split(cmd, comments=True)
pass
elif "PING" == tokens[0] and 1 == len(tokens):
io_db["file_out"].write("PONG\n")
+ io_db["file_out"].flush()
elif "QUIT" == tokens[0] and 1 == len(tokens):
- record("# " + cmd, path_recordfile)
+ if do_record:
+ record("# " + cmd, io_db)
raise SystemExit("received QUIT command")
elif "MAKE_WORLD" == tokens[0] and 2 == len(tokens):
- print("I would generate a new world now, if only I knew how.")
- record(cmd, io_db)
+ if replay_file:
+ print("Due to replay mode, reading command as 'go on in record'.")
+ line = replay_file.readline()
+ if len(line) > 0:
+ obey(line.rstrip(), io_db,
+ replay_file.prefix + str(file.line_n))
+ file.line_n = file.line_n + 1
+ else:
+ print("Reached end of record file.")
+ else:
+ print("I would generate a new world now, if only I knew how.")
+ if do_record:
+ record(cmd, io_db)
else:
print("Invalid command/argument, or bad number of tokens.")
os.rename(path_tmp, io_db["path_record"])
-def obey_lines_in_file(path, name, break_test = None):
- """Call obey() on each line of path's file, use name in input prefix.
-
- If break_test function is set, only read the file until it returns True.
- """
+def obey_lines_in_file(path, name, do_record=False):
+ """Call obey() on each line of path's file, use name in input prefix."""
file = open(path, "r")
line_n = 1
for line in file.readlines():
- if None != break_test and break_test():
- break
- obey(line.rstrip(), io_db, name + "file line " + str(line_n))
+ obey(line.rstrip(), io_db, name + "file line " + str(line_n),
+ do_record=do_record)
line_n = line_n + 1
file.close()
-def make_turn_tester(turn_to_compare, world_db):
- """Return tester whether world_db["turn"] greater/equal turn_to_compare."""
- def turn_tester():
- return world_db["turn"] >= turn_to_compare
- return turn_tester
+def parse_command_line_arguments():
+ """Return settings values read from command line arguments."""
+ parser = argparse.ArgumentParser()
+ parser.add_argument('-s', nargs='?', type=int, dest='replay', const=1,
+ action='store')
+ opts, unknown = parser.parse_known_args()
+ return opts
+
+
+def server_test(io_db):
+ """Ensure valid server out file belonging to current process.
+
+ On failure, set io_db["kicked_by_rival"] and raise SystemExit.
+ """
+ if not os.access(io_db["path_out"], os.F_OK):
+ raise SystemExit("Server output file has disappeared.")
+ file = open(io_db["path_out"], "r")
+ test = file.readline().rstrip("\n")
+ file.close()
+ if test != io_db["teststring"]:
+ io_db["kicked_by_rival"] = True
+ msg = "Server test string in server output file does not match. This" \
+ " indicates that the current server process has been " \
+ "superseded by another one."
+ raise SystemExit(msg)
+
+
+def read_command(io_db):
+ """Return next newline-delimited command from server in file.
+
+ Keep building return string until a newline is encountered. Pause between
+ unsuccessful reads, and after too much waiting, run server_test().
+ """
+ wait_on_fail = 1
+ max_wait = 5
+ now = time.time()
+ command = ""
+ while 1:
+ add = io_db["file_in"].readline()
+ if len(add) > 0:
+ command = command + add
+ if len(command) > 0 and "\n" == command[-1]:
+ command = command[:-1]
+ break
+ else:
+ time.sleep(wait_on_fail)
+ if now + max_wait < time.time():
+ server_test(io_db)
+ now = time.time()
+ return command
io_db = {}
world_db = {}
try:
- parser = argparse.ArgumentParser()
- parser.add_argument('-s', nargs='?', type=int, dest='replay', const=1,
- action='store')
+ opts = parse_command_line_arguments()
setup_server_io(io_db)
# print("DUMMY: Run game.")
- detect_atomic_leftover(io_db["path_save"], io_db["tmp_suffix"])
- detect_atomic_leftover(io_db["path_record"], io_db["tmp_suffix"])
- opts, unknown = parser.parse_known_args()
if None != opts.replay:
if opts.replay < 1:
opts.replay = 1
if not os.access(io_db["path_record"], os.F_OK):
raise SystemExit("No record file found to replay.")
world_db["turn"] = 0
- break_tester = make_turn_tester(opts.replay, world_db)
- obey_lines_in_file(io_db["path_record"], "record ", break_tester)
+ file = open(io_db["path_record"], "r")
+ file.prefix = "recod file line "
+ file.line_n = 1
+ while world_db["turn"] < opts.replay:
+ obey(file.readline().rstrip(), io_db,
+ file.prefix + str(file.line_n))
+ file.line_n = file.line_n + 1
+ try:
+ while 1:
+ obey(read_command(io_db), io_db, "in file", replay_file=file)
+ except SystemExit:
+ file.close()
+ raise
else:
if os.access(io_db["path_save"], os.F_OK):
obey_lines_in_file(io_db["path_save"], "save")
if not os.access(io_db["path_worldconf"], os.F_OK):
msg = "No world config file from which to start a new world."
raise SystemExit(msg)
- obey_lines_in_file(io_db["path_worldconf"], "world config ")
- obey("MAKE_WORLD " + str(int(time.time())), io_db, "in file")
- # print("DUMMY: Run io_loop().")
+ obey_lines_in_file(io_db["path_worldconf"], "world config ",
+ do_record=True)
+ obey("MAKE_WORLD " + str(int(time.time())), io_db, "in file",
+ do_record=True)
+ while 1:
+ obey(read_command(io_db), io_db, "in file", do_record=True)
except SystemExit as exit:
print("ABORTING: " + exit.args[0])
except:
projects / plomrogue / blobdiff