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Commit c1cfbdd9 by Owo Sugiana
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Pencegahan payment ganda dengan menerapkan antrian berdasarkan Invoice ID

1 parent f6b47668
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Showing 2 changed files with 68 additions and 8 deletions
CHANGES.txt
0.5 2021-5-10
-------------
- Pencegahan payment ganda yaitu menerapkan antrian berdasarkan Invoice ID.
0.4.1 2020-11-26 0.4.1 2020-11-26
---------------- ----------------
- Aspek security yang lebih rapi. - Aspek security yang lebih rapi.
......
iso8583_web/iso8583/__init__.py
...@@ -58,6 +58,13 @@ parser_threads = [] ...@@ -58,6 +58,13 @@ parser_threads = []
# iso response for aggregator]) # iso response for aggregator])
iso_process = {} iso_process = {}
# Daftar antrian Invoice ID untuk menghindari payment ganda
# key: ip:port
# value: dict of (
# key: Invoice ID
# value: list of Thread ID)
invoice_ids = {}
def append_iso_process( def append_iso_process(
ip_port_target, iso_response, iso_for_host, ip_port_source): ip_port_target, iso_response, iso_for_host, ip_port_source):
...@@ -69,6 +76,23 @@ def append_iso_process( ...@@ -69,6 +76,23 @@ def append_iso_process(
iso_process[ip_port_target] = {stan: data} iso_process[ip_port_target] = {stan: data}
def append_invoice_id(ip_port, inv_id, mem_id):
if ip_port in invoice_ids:
if inv_id in invoice_ids[ip_port]:
invoice_ids[ip_port][inv_id].append(mem_id)
else:
invoice_ids[ip_port][inv_id] = [mem_id]
else:
invoice_ids[ip_port] = {inv_id: [mem_id]}
def remove_invoice_id(ip_port, inv_id):
mem_id = invoice_ids[ip_port][inv_id][0]
invoice_ids[ip_port][inv_id].remove(mem_id)
if not invoice_ids[ip_port][inv_id]:
del invoice_ids[ip_port][inv_id]
def to_str(s): def to_str(s):
if sys.version_info.major > 2: if sys.version_info.major > 2:
return s return s
...@@ -308,8 +332,10 @@ class Parser(Log): ...@@ -308,8 +332,10 @@ class Parser(Log):
self.connection = connection self.connection = connection
self.raw = raw self.raw = raw
self.conf = connection.conf self.conf = connection.conf
self.ip_port = join_ip_port(self.conf['ip'], self.conf['port'])
self.conn_id = id(connection) self.conn_id = id(connection)
self.parser_id = id(self) self.parser_id = id(self)
self.begin_time = time()
self.running = True self.running = True
# Override # Override
...@@ -318,14 +344,45 @@ class Parser(Log): ...@@ -318,14 +344,45 @@ class Parser(Log):
ip=self.conf['ip'], name=self.conf['name'], conn_id=self.conn_id, ip=self.conf['ip'], name=self.conf['name'], conn_id=self.conn_id,
parser_id=self.parser_id, msg=msg) parser_id=self.parser_id, msg=msg)
def append_invoice_id(self, inv_id):
append_invoice_id(self.ip_port, inv_id, self.parser_id)
def remove_invoice_id(self, inv_id):
remove_invoice_id(self.ip_port, inv_id)
def is_my_turn(self, inv_id):
mem_id = invoice_ids[self.ip_port][inv_id][0]
return mem_id == self.parser_id
def wait_for_same_invoice_id(self, inv_id):
self.log_debug(f'Antrian {invoice_ids[self.ip_port][inv_id]}')
sleep(1)
duration = time() - self.begin_time
if duration < 10:
return True
self.log_error('Timeout')
self.running = False
def run(self): def run(self):
from_iso = self.connection.job.raw_to_iso(self.raw) from_iso = self.connection.job.raw_to_iso(self.raw)
self.log_decode(from_iso) self.log_decode(from_iso)
is_trx = from_iso.is_transaction_request()
if is_trx:
inv_id = from_iso.get_invoice_id()
self.append_invoice_id(inv_id)
while True:
if self.is_my_turn(inv_id):
break
if not self.wait_for_same_invoice_id(inv_id):
return
try: try:
iso = self.connection.job.process(from_iso) iso = self.connection.job.process(from_iso)
except Exception: except Exception:
self.log_unknown() self.log_unknown()
self.running = False self.running = False
if is_trx:
self.remove_invoice_id(inv_id)
if not self.running:
return return
if iso: if iso:
try: try:
...@@ -344,21 +401,20 @@ class Parser(Log): ...@@ -344,21 +401,20 @@ class Parser(Log):
self.running = False self.running = False
def on_response(self, from_iso): def on_response(self, from_iso):
ip_port = join_ip_port(self.conf['ip'], self.conf['port']) if self.ip_port in web_process:
if ip_port in web_process: stan_list = web_process[self.ip_port]
stan_list = web_process[ip_port]
stan = from_iso.get_stan() stan = from_iso.get_stan()
if stan in stan_list: if stan in stan_list:
i = stan_list.index(stan) i = stan_list.index(stan)
del stan_list[i] del stan_list[i]
append_web_response(ip_port, stan, from_iso) append_web_response(self.ip_port, stan, from_iso)
# as forwarder # as forwarder
if ip_port not in iso_process: if self.ip_port not in iso_process:
return return
stan = from_iso.get_stan() stan = from_iso.get_stan()
if stan not in iso_process[ip_port]: if stan not in iso_process[self.ip_port]:
return return
ip_port_source, iso = iso_process[ip_port][stan] ip_port_source, iso = iso_process[self.ip_port][stan]
try: try:
iso.continue_response(from_iso) iso.continue_response(from_iso)
ok = True ok = True
...@@ -369,7 +425,7 @@ class Parser(Log): ...@@ -369,7 +425,7 @@ class Parser(Log):
conn = get_connection_from_ip_port(ip_port_source) conn = get_connection_from_ip_port(ip_port_source)
self.log_ack(iso) self.log_ack(iso)
self.send_by_conn(iso, conn) self.send_by_conn(iso, conn)
del iso_process[ip_port][stan] del iso_process[self.ip_port][stan]
def send_by_conn(self, iso, conn): def send_by_conn(self, iso, conn):
conn.log_encode(iso) conn.log_encode(iso)
......
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