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shankar0123
08a86d355d
Closes Bundle 9 of the 2026-05-02 deployment-target coverage audit
(see cowork/deployment-target-audit-2026-05-02/RESULTS.md). Three
small independent fixes that share one connector file:
1. Duration metric (caddy.go L176). Pre-fix:
"duration_ms": fmt.Sprintf("%d", time.Since(time.Now()).Milliseconds())
This always returned ~0ms because time.Now() was called twice —
the second call captured a baseline immediately before time.Since
computed the delta. The intended baseline is `startTime` declared
at L113 and threaded through deployViaFile correctly. Post-fix:
"duration_ms": fmt.Sprintf("%d", time.Since(startTime).Milliseconds())
deployViaAPI's signature evolves to take startTime time.Time so
the api-mode path uses the same baseline as the file-mode path.
2. File-mode ValidateDeployment now validates PEM syntax. Pre-fix
(caddy.go L266-293) checked file existence only via os.Stat. A
cert file containing garbage bytes passed validation; Caddy's
file-watcher silently failed to load it; operators saw "validation
green" + "TLS handshake fails" with no obvious connection.
Post-fix: after the os.Stat checks succeed, os.ReadFile + parse
the first PEM block as an x509 cert via the shared
certutil.ParseCertificatePEM helper. Failure surfaces as
Valid=false with a clear "not valid PEM/x509" message.
3. API-mode idempotency short-circuit. Pre-fix, every deploy POSTed
to /config/apps/tls/certificates/load even when the active cert
was already what we wanted to deploy. Caddy reloads TLS state on
every POST, briefly bumping CPU and possibly disrupting connections
in flight. Post-fix: idempotencySkipPOST runs a GET first, parses
the response (handles BOTH the array-of-objects and single-object
shapes Caddy admin can return), SHA-256 compares the entry's
`cert` field to the deploy payload's cert bytes, and skips the
POST when match. Result.Metadata["idempotent"]="true" surfaces
the no-op. Conservative: any GET failure (network, non-200, parse
error, no matching entry, hash mismatch) silently falls through to
the POST, preserving today's behavior. Idempotency is a fast path,
not a correctness boundary — false negatives are safe; false
positives are dangerous.
Tests added to caddy_test.go (6 new tests, ~290 LOC):
- TestCaddy_API_DurationMetric_NonZero (httptest server with a 10ms
sleep in the POST handler; asserts duration_ms parses as int >= 5).
- TestCaddy_ValidateDeployment_FileMode_MalformedPEM_Rejected (writes
garbage to cert.pem; asserts Valid=false with PEM/x509 in message).
- TestCaddy_ValidateDeployment_FileMode_ValidPEM_Accepted (writes a
real ECDSA P-256 self-signed cert; asserts Valid=true).
- TestCaddy_API_Idempotent_SkipsPOSTWhenCertHashMatches (GET response
contains the same cert as the deploy payload; POST counter remains
0; metadata.idempotent=true; exactly 1 GET probe ran).
- TestCaddy_API_Idempotent_RunsPOSTWhenCertHashDiffers (GET response
contains a DIFFERENT cert; POST counter is 1; idempotent absent).
- TestCaddy_API_Idempotent_GETFails_FallsThroughToPOST (GET returns
500; POST still runs; deploy succeeds; idempotent absent).
Two existing tests updated to match the new contracts:
- TestCaddyConnector_DeployViaAPI_Success: mock handler now serves
BOTH GET (returns "[]" so the comparison falls through) and POST
(the original 200-OK path). The dispatch is a method-switch
inside the path-match branch.
- TestCaddyConnector_ValidateDeployment_Success: the placeholder
cert "MIIC..." used to pass the old existence-only check; post-Fix-2
it fails the PEM-parse check. Test now uses generateTestCertAndKey
to produce a real self-signed ECDSA P-256 cert.
generateTestCertAndKey helper added to the test file — same pattern
the javakeystore + wincertstore tests use, kept local because the
caddy package has no other test in the certutil family that would
make a shared helper cleaner.
Verified locally:
- gofmt -l ./internal/connector/target/caddy/ clean
- go vet ./internal/connector/target/caddy/ clean
- go build ./cmd/agent/... clean (factory wiring unchanged)
- go test -race -count=1 ./internal/connector/target/caddy/ green
(16 tests total: 11 pre-existing including the two updated +
6 new)
Audit reference: cowork/deployment-target-audit-2026-05-02/RESULTS.md
Bundle 9.