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FA-28376 / HTTP redirects / Open access

Partition redirect cache entries by their declared request dimensions: partition key · case 01

Partition redirect cache entries by their declared request dimensions: the partition key branch emits an incorrect decision.

Verified by executionVariant 1 · 6 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

The partition-key decision uses "'global'"; this violates the stipulated controller policy.

THE FAILURE

The partition-key decision uses "'global'"; this violates the stipulated controller policy.

Unsuccessful approach: The partial repair uses 'partition[:3]' and still fails an explicit boundary or control.

Case contract

Partition redirect cache entries by their declared request dimensions. The explicit fixture inputs and outputs define a bounded offline policy; request identity must accompany the decision.

Why this case matters

Models a redirect controller decision before following a target or exposing a redirect result.

1 / The failure

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json
from urllib.parse import urlsplit, unquote, quote
import posixpath
import re
N = 1
observations = []
def solve(request, scheme, host, port, method, path, query, partition, vary):
    return {'request': request, 'decision': [scheme, host.lower(), None if (scheme,port) in (("https",443),("http",80)) else port, method, path, query, '=' in query, 'global', vary, len(vary)]} 
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('fixture 1', solve('/requests/' + str(N) + '/0', 'https', 'H.TEST', 443, 'GET', '/A', 'x=1', 'tab1', ['en', 'gzip']), {'request': '/requests/' + str(N) + '/0', 'decision': ['https', 'h.test', None, 'GET', '/A', 'x=1', True, 'tab1', ['en', 'gzip'], 2]})
check('fixture 2', solve('/requests/' + str(N) + '/1', 'https', 'h.test', 8443, 'HEAD', '/a', 'x=2', 'tab2', ['fr', 'br']), {'request': '/requests/' + str(N) + '/1', 'decision': ['https', 'h.test', 8443, 'HEAD', '/a', 'x=2', True, 'tab2', ['fr', 'br'], 2]})
check('fixture 3', solve('/requests/' + str(N) + '/2', 'http', 'h.test', 80, 'POST', '/a', 'q=', 'tab1', []), {'request': '/requests/' + str(N) + '/2', 'decision': ['http', 'h.test', None, 'POST', '/a', 'q=', True, 'tab1', [], 0]})
check('fixture 4', solve('/requests/' + str(N) + '/3', 'http', 'Z.TEST', 8080, 'GET', '/b', 'b=2&a=1&b=2', 'tab3', ['en', 'br']), {'request': '/requests/' + str(N) + '/3', 'decision': ['http', 'z.test', 8080, 'GET', '/b', 'b=2&a=1&b=2', True, 'tab3', ['en', 'br'], 2]})
check('fixture 5', solve('/requests/' + str(N) + '/4', 'https', 'h.test', 443, 'PUT', '/B', 'flag', 'tab2', ['']), {'request': '/requests/' + str(N) + '/4', 'decision': ['https', 'h.test', None, 'PUT', '/B', 'flag', False, 'tab2', [''], 1]})
check('fixture 6', solve('/requests/' + str(N) + '/5', 'https', 'h.test', 443, 'GET', '/a', 'x=1', 'tab1', ['gzip', 'en', 'gzip']), {'request': '/requests/' + str(N) + '/5', 'decision': ['https', 'h.test', None, 'GET', '/a', 'x=1', True, 'tab1', ['gzip', 'en', 'gzip'], 3]})
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
fixture 1{'decision': ['https', 'h.test', None, 'GET', '/A', 'x=1', True, 'global', ['en', 'gzip'], 2], 'request': '/requests/1/0'}{'decision': ['https', 'h.test', None, 'GET', '/A', 'x=1', True, 'tab1', ['en', 'gzip'], 2], 'request': '/requests/1/0'}Failed
fixture 2{'decision': ['https', 'h.test', 8443, 'HEAD', '/a', 'x=2', True, 'global', ['fr', 'br'], 2], 'request': '/requests/1/1'}{'decision': ['https', 'h.test', 8443, 'HEAD', '/a', 'x=2', True, 'tab2', ['fr', 'br'], 2], 'request': '/requests/1/1'}Failed
fixture 3{'decision': ['http', 'h.test', None, 'POST', '/a', 'q=', True, 'global', [], 0], 'request': '/requests/1/2'}{'decision': ['http', 'h.test', None, 'POST', '/a', 'q=', True, 'tab1', [], 0], 'request': '/requests/1/2'}Failed
fixture 4{'decision': ['http', 'z.test', 8080, 'GET', '/b', 'b=2&a=1&b=2', True, 'global', ['en', 'br'], 2], 'request': '/requests/1/3'}{'decision': ['http', 'z.test', 8080, 'GET', '/b', 'b=2&a=1&b=2', True, 'tab3', ['en', 'br'], 2], 'request': '/requests/1/3'}Failed
fixture 5{'decision': ['https', 'h.test', None, 'PUT', '/B', 'flag', False, 'global', [''], 1], 'request': '/requests/1/4'}{'decision': ['https', 'h.test', None, 'PUT', '/B', 'flag', False, 'tab2', [''], 1], 'request': '/requests/1/4'}Failed
fixture 6{'decision': ['https', 'h.test', None, 'GET', '/a', 'x=1', True, 'global', ['gzip', 'en', 'gzip'], 3], 'request': '/requests/1/5'}{'decision': ['https', 'h.test', None, 'GET', '/a', 'x=1', True, 'tab1', ['gzip', 'en', 'gzip'], 3], 'request': '/requests/1/5'}Failed

SHA-256 / d59c051b32d65028ea52da505bcd9afc9ed031459e9b23752fc5faf6a182dd61

2 / The unsuccessful fix

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json
from urllib.parse import urlsplit, unquote, quote
import posixpath
import re
N = 1
observations = []
def solve(request, scheme, host, port, method, path, query, partition, vary):
    return {'request': request, 'decision': [scheme, host.lower(), None if (scheme,port) in (("https",443),("http",80)) else port, method, path, query, '=' in query, partition[:3], vary, len(vary)]} 
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('fixture 1', solve('/requests/' + str(N) + '/0', 'https', 'H.TEST', 443, 'GET', '/A', 'x=1', 'tab1', ['en', 'gzip']), {'request': '/requests/' + str(N) + '/0', 'decision': ['https', 'h.test', None, 'GET', '/A', 'x=1', True, 'tab1', ['en', 'gzip'], 2]})
check('fixture 2', solve('/requests/' + str(N) + '/1', 'https', 'h.test', 8443, 'HEAD', '/a', 'x=2', 'tab2', ['fr', 'br']), {'request': '/requests/' + str(N) + '/1', 'decision': ['https', 'h.test', 8443, 'HEAD', '/a', 'x=2', True, 'tab2', ['fr', 'br'], 2]})
check('fixture 3', solve('/requests/' + str(N) + '/2', 'http', 'h.test', 80, 'POST', '/a', 'q=', 'tab1', []), {'request': '/requests/' + str(N) + '/2', 'decision': ['http', 'h.test', None, 'POST', '/a', 'q=', True, 'tab1', [], 0]})
check('fixture 4', solve('/requests/' + str(N) + '/3', 'http', 'Z.TEST', 8080, 'GET', '/b', 'b=2&a=1&b=2', 'tab3', ['en', 'br']), {'request': '/requests/' + str(N) + '/3', 'decision': ['http', 'z.test', 8080, 'GET', '/b', 'b=2&a=1&b=2', True, 'tab3', ['en', 'br'], 2]})
check('fixture 5', solve('/requests/' + str(N) + '/4', 'https', 'h.test', 443, 'PUT', '/B', 'flag', 'tab2', ['']), {'request': '/requests/' + str(N) + '/4', 'decision': ['https', 'h.test', None, 'PUT', '/B', 'flag', False, 'tab2', [''], 1]})
check('fixture 6', solve('/requests/' + str(N) + '/5', 'https', 'h.test', 443, 'GET', '/a', 'x=1', 'tab1', ['gzip', 'en', 'gzip']), {'request': '/requests/' + str(N) + '/5', 'decision': ['https', 'h.test', None, 'GET', '/a', 'x=1', True, 'tab1', ['gzip', 'en', 'gzip'], 3]})
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
fixture 1{'decision': ['https', 'h.test', None, 'GET', '/A', 'x=1', True, 'tab', ['en', 'gzip'], 2], 'request': '/requests/1/0'}{'decision': ['https', 'h.test', None, 'GET', '/A', 'x=1', True, 'tab1', ['en', 'gzip'], 2], 'request': '/requests/1/0'}Failed
fixture 2{'decision': ['https', 'h.test', 8443, 'HEAD', '/a', 'x=2', True, 'tab', ['fr', 'br'], 2], 'request': '/requests/1/1'}{'decision': ['https', 'h.test', 8443, 'HEAD', '/a', 'x=2', True, 'tab2', ['fr', 'br'], 2], 'request': '/requests/1/1'}Failed
fixture 3{'decision': ['http', 'h.test', None, 'POST', '/a', 'q=', True, 'tab', [], 0], 'request': '/requests/1/2'}{'decision': ['http', 'h.test', None, 'POST', '/a', 'q=', True, 'tab1', [], 0], 'request': '/requests/1/2'}Failed
fixture 4{'decision': ['http', 'z.test', 8080, 'GET', '/b', 'b=2&a=1&b=2', True, 'tab', ['en', 'br'], 2], 'request': '/requests/1/3'}{'decision': ['http', 'z.test', 8080, 'GET', '/b', 'b=2&a=1&b=2', True, 'tab3', ['en', 'br'], 2], 'request': '/requests/1/3'}Failed
fixture 5{'decision': ['https', 'h.test', None, 'PUT', '/B', 'flag', False, 'tab', [''], 1], 'request': '/requests/1/4'}{'decision': ['https', 'h.test', None, 'PUT', '/B', 'flag', False, 'tab2', [''], 1], 'request': '/requests/1/4'}Failed
fixture 6{'decision': ['https', 'h.test', None, 'GET', '/a', 'x=1', True, 'tab', ['gzip', 'en', 'gzip'], 3], 'request': '/requests/1/5'}{'decision': ['https', 'h.test', None, 'GET', '/a', 'x=1', True, 'tab1', ['gzip', 'en', 'gzip'], 3], 'request': '/requests/1/5'}Failed

SHA-256 / 56b10bb2f1dcbe1fcc3270ae82d7d90bac24b049104ae2940ad9b490187c7dba

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The verified repair and its recorded checks are member-only.

This mechanism has 6 recorded checks per implementation. The open-access tier publishes the failure and the unsuccessful fix; the repaired source that passes every check, and the observations that prove it, are available to members.

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Verification & scope

Stipulated offline redirect policy, not a complete HTTP, browser, URL, cache, or security implementation. Numbered variants vary request correlation identity. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.

Observations recorded using Python 3.12.14 at 2026-09-29T14:41:33.396148+00:00.

Case digest / 55650ee81b96b0ce804a7c8426d2c66742ca219eda58822c53fe2ee7a0dab314