{"record":{"id":"f0a7687bf9f84bc9","repo":"sqlmapproject/sqlmap","slug":"cannot-calibrate-oracle-transport-failed-on-a","errorCode":null,"errorMessage":"[!] cannot calibrate oracle: transport failed on a control request","messagePattern":"\\[!\\] cannot calibrate oracle: transport failed on a control request","errorType":"exception","errorClass":"SystemExit","httpStatus":null,"severity":"error","filePath":"extra/esperanto/__main__.py","lineNumber":439,"sourceCode":"\n    dyn = set()\n\n    def _deReflect(body, cond):\n        return body.replace(cond, \"\") if cond else body     # drop the reflected payload\n\n    def _clean(body, cond):\n        body = _deReflect(body, cond)\n        return \"\\n\".join(ln for ln in body.split(\"\\n\") if ln not in dyn) if dyn else body\n\n    mode, wanted, base = None, None, {}\n    if string is not None:\n        mode = \"string\"\n    elif code is not None:\n        mode, wanted = \"code\", int(code)\n    else:                                                   # auto-calibrate\n        (t1, s1), (t2, s2), (f1, sf) = fetch(\"1=1\"), fetch(\"1=1\"), fetch(\"1=2\")\n        if t1 is None or t2 is None or f1 is None:\n            raise SystemExit(\"[!] cannot calibrate oracle: transport failed on a control request\")\n        dyn = set(t1.split(\"\\n\")) ^ set(t2.split(\"\\n\"))     # varies between identical requests -> dynamic\n        tc, fc = _clean(t1, \"1=1\"), _clean(f1, \"1=2\")\n        if s1 == s2 and s1 != sf:                           # (1) HTTP status alone separates true/false\n            mode, wanted = \"code\", s1\n        else:\n            # (2) a SHORT distinctive true-only marker: the longest contiguous chunk that is\n            # in the true page but not the false one, capped to a \"longish\" string (never the\n            # whole document) and verified stable across BOTH true baselines\n            t2c = _clean(t2, \"1=1\")\n            blocks = difflib.SequenceMatcher(None, fc, tc, autojunk=False).get_opcodes()\n            chunks = sorted((tc[b1:b2].strip() for op, _a1, _a2, b1, b2 in blocks\n                             if op in (\"insert\", \"replace\")), key=len, reverse=True)\n            wanted = None\n            for chunk in chunks:\n                marker = chunk[:64]                         # bounded, distinctive marker\n                if len(marker) >= 6 and marker in t2c and marker not in fc:\n                    mode, wanted = \"autostring\", marker\n                    break","sourceCodeStart":421,"sourceCodeEnd":457,"githubUrl":"https://github.com/sqlmapproject/sqlmap/blob/0a35b20e3953d341be6c7ac75ccb0b3362540c8d/extra/esperanto/__main__.py#L421-L457","documentation":"Error \"[!] cannot calibrate oracle: transport failed on a control request\" thrown in sqlmapproject/sqlmap.","triggerScenarios":"Thrown at extra/esperanto/__main__.py:439 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"0a35b20e3953d341be6c7ac75ccb0b3362540c8d","analyzedAt":"2026-08-26T23:02:52.002Z","schemaVersion":2},"datasetVersion":"2026-08-27T03:17:27.898Z"}