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#!/usr/bin/env python3
"""Local stand-in for the cep.is API, used by the test driver.
Behaviour is selected by the first path segment, so a test points the client
at a different ``base_url`` to get a different server: ``/fail2`` fails twice
then answers, ``/always503`` never answers, and so on. Every prefix counts the
requests it saw; ``/_stats/<prefix>/health`` reports that count in the ``ceps``
field so the C driver can assert on it without speaking HTTP itself.
"""
import json
import sys
import threading
from datetime import datetime, timedelta, timezone
from email.utils import format_datetime
from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
from urllib.parse import parse_qs, urlparse
COLUMNS = [
"cep", "logradouro", "complemento", "unidade", "bairro", "localidade",
"uf", "estado", "regiao", "ibge", "gia", "ddd", "siafi",
]
DB = {
"01001000": {
"cep": "01001000", "logradouro": "Praça da Sé",
"complemento": "lado ímpar", "unidade": "", "bairro": "Sé",
"localidade": "São Paulo", "uf": "SP", "estado": "São Paulo",
"regiao": "Sudeste", "ibge": "3550308", "gia": "1004", "ddd": "11",
"siafi": "7107",
"geo": {"lat": -23.567202, "lon": -46.649659, "raio_m": 1084,
"precisao": "logradouro"},
},
"20040020": {
"cep": "20040020", "logradouro": "Avenida Rio Branco",
"complemento": "", "unidade": "", "bairro": "Centro",
"localidade": "Rio de Janeiro", "uf": "RJ",
"estado": "Rio de Janeiro", "regiao": "Sudeste", "ibge": "3304557",
"gia": "", "ddd": "21", "siafi": "6001",
},
"69900000": {
"cep": "69900000", "logradouro": "", "complemento": "", "unidade": "",
"bairro": "", "localidade": "Rio Branco", "uf": "AC",
"estado": "Acre", "regiao": "Norte", "ibge": "1200401", "gia": "",
"ddd": "68", "siafi": "0605",
"geo": {"lat": -9.97499, "lon": -67.8243, "raio_m": 18420,
"precisao": "localidade"},
},
"12345678": {
"cep": "12345678", "logradouro": 'Rua A, B "quoted"',
"complemento": "até 100", "unidade": "", "bairro": "Vila, Nova",
"localidade": "Campinas", "uf": "SP", "estado": "São Paulo",
"regiao": "Sudeste", "ibge": "3509502", "gia": "2446", "ddd": "19",
"siafi": "6291",
},
}
for _n in range(600):
_c = "%08d" % (70000000 + _n)
DB[_c] = {
"cep": _c, "logradouro": "Rua %d" % _n, "complemento": "",
"unidade": "", "bairro": "Centro", "localidade": "Cidade %d" % _n,
"uf": "SP", "estado": "São Paulo", "regiao": "Sudeste",
"ibge": "3550308", "gia": "", "ddd": "11", "siafi": "7107",
}
# Bands the API knows about. A 404 for a CEP inside one carries the owning
# municipality in "faixa"; a 404 outside every band omits the key entirely.
# cep_ini/cep_fim inside the object are the extreme CEPs that exist, which is
# why they differ from the band bounds: 25845000 is in the band, is the DNE's
# own start for Areal, and does not exist.
FAIXAS = [
("25845000", "25849999", {
"localidade": "Areal", "uf": "RJ", "estado": "Rio de Janeiro",
"regiao": "Sudeste", "ibge": "3300225", "cep_ini": "25845001",
"cep_fim": "25849899", "ceps": 118,
}),
]
HITS = {}
LOCK = threading.Lock()
def not_found(cep=None):
body = {"erro": "cep_nao_encontrado",
"mensagem": "CEP não existe na base do DNE"}
for low, high, faixa in FAIXAS:
if cep is not None and low <= cep <= high:
body["faixa"] = faixa
break
return json.dumps(body, ensure_ascii=False)
def bump(prefix):
with LOCK:
HITS[prefix] = HITS.get(prefix, 0) + 1
return HITS[prefix]
def csv_escape(value):
if any(c in value for c in ',"\r\n'):
return '"' + value.replace('"', '""') + '"'
return value
def csv_row(cep):
entry = DB.get(cep)
if entry is None:
return ",".join([cep] + [""] * (len(COLUMNS) - 1))
return ",".join(csv_escape(entry.get(c, "")) for c in COLUMNS)
class Handler(BaseHTTPRequestHandler):
protocol_version = "HTTP/1.1"
def log_message(self, fmt, *args):
pass
def send(self, code, body, ctype="application/json; charset=utf-8",
headers=None):
raw = body.encode("utf-8") if isinstance(body, str) else body
self.send_response(code)
self.send_header("Content-Type", ctype)
self.send_header("Content-Length", str(len(raw)))
for key, value in (headers or {}).items():
self.send_header(key, value)
self.end_headers()
self.wfile.write(raw)
def do_GET(self):
parsed = urlparse(self.path)
parts = [p for p in parsed.path.split("/") if p]
if parts and parts[0] == "_stats":
name = parts[1] if len(parts) > 1 else ""
with LOCK:
count = HITS.get(name, 0)
self.send(200, json.dumps({
"status": "ok", "dne": "test", "ceps": count, "geo": 0,
"base_gerada_em": "2026-07-24T03:48:28Z",
}))
return
prefix = ""
if parts and not parts[0].isdigit() and parts[0] not in ("csv", "health"):
prefix = parts.pop(0)
count = bump(prefix)
if prefix == "always503":
self.send(503, '{"erro":"interno","mensagem":"falha interna"}')
return
if prefix == "always429":
self.send(429, '{"erro":"limite","mensagem":"devagar"}',
headers={"Retry-After": "1"})
return
if prefix == "date429":
when = datetime.now(timezone.utc) + timedelta(seconds=2)
self.send(429, '{"erro":"limite","mensagem":"devagar"}',
headers={"Retry-After": format_datetime(when,
usegmt=True)})
return
if prefix == "hugeretry":
self.send(429, '{"erro":"limite","mensagem":"devagar"}',
headers={"Retry-After": "3600"})
return
if prefix == "fail2" and count <= 2:
self.send(503, '{"erro":"interno","mensagem":"falha interna"}')
return
if prefix == "flaky" and count == 1:
self.send(500, '{"erro":"interno","mensagem":"falha interna"}')
return
if prefix == "always400":
self.send(400, '{"erro":"cep_invalido",'
'"mensagem":"CEP deve ter 8 dígitos"}')
return
if prefix == "badjson":
self.send(200, "<html>captive portal</html>", ctype="text/html")
return
if prefix == "badgeo":
entry = dict(DB["01001000"])
entry["geo"] = {"lat": "nao-e-numero", "precisao": "logradouro"}
entry["campo_novo"] = {"nested": [1, 2, 3]}
self.send(200, json.dumps(entry, ensure_ascii=False))
return
if prefix == "surrogate":
entry = dict(DB["01001000"])
entry["logradouro"] = "Rua \U0001F600 Feliz"
self.send(200, json.dumps(entry, ensure_ascii=True))
return
if prefix == "escaped":
self.send(200, json.dumps(DB["01001000"], ensure_ascii=True))
return
if prefix == "faixavazia":
self.send(404, json.dumps({
"erro": "cep_nao_encontrado",
"mensagem": "CEP não existe na base do DNE",
"faixa": {},
}, ensure_ascii=False))
return
if prefix == "faixatexto":
self.send(404, json.dumps({
"erro": "cep_nao_encontrado",
"mensagem": "CEP não existe na base do DNE",
"faixa": "Areal",
}, ensure_ascii=False))
return
if parts and parts[0] == "health":
body = {"status": "ok", "dne": "26071", "ceps": 1596168,
"geo": 894489, "base_gerada_em": "2026-07-24T03:48:28Z"}
if prefix == "degraded":
body["status"] = "degraded"
self.send(503, json.dumps(body))
return
self.send(200, json.dumps(body))
return
if parts and parts[0] == "csv":
query = parse_qs(parsed.query)
ceps = [c for c in query.get("ceps", [""])[0].split(",") if c]
if len(ceps) > 500:
self.send(400, '{"erro":"limite","mensagem":"máximo 500"}')
return
if prefix == "short":
ceps = ceps[:1]
rows = [",".join(COLUMNS)] + [csv_row(c) for c in ceps]
body = "\r\n".join(rows) + "\r\n"
if prefix == "bom":
body = "\ufeff" + body
self.send(200, body, ctype="text/csv; charset=utf-8")
return
if not parts:
self.send(404, not_found())
return
cep = parts[0]
if not (len(cep) == 8 and cep.isdigit()):
self.send(400, '{"erro":"cep_invalido",'
'"mensagem":"CEP deve ter 8 dígitos"}')
return
entry = DB.get(cep)
if entry is None:
self.send(404, not_found(cep))
return
self.send(200, json.dumps(entry, ensure_ascii=False))
def main():
port = int(sys.argv[1]) if len(sys.argv) > 1 else 0
server = ThreadingHTTPServer(("127.0.0.1", port), Handler)
print(server.server_address[1], flush=True)
server.serve_forever()
if __name__ == "__main__":
main()
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