feat: headless webhook-service for outbound partner webhooks by devin-ai-integration[bot] · Pull Request #1547 · Cognition-Partner-Workshops/otterworks

devin-ai-integration · 2026-09-10T14:04:45Z

Summary

Adds a headless outbound partner-webhook capability: services/webhook-service (Go 1.22 / Chi, port 8092) plus a webhook-sink demo receiver (port 8093), wired into the gateway, compose, LocalStack init, Makefile, CI and docs. The service has no UI surface at all — openapi.yaml is the only interface contract.

How it works

Auth is gateway-only: the gateway validates the JWT and injects X-User-ID; the service scopes every subscription/delivery query to that owner (401 if the header is missing).
Events: a dedicated SQS queue webhook-service-events is subscribed to the existing otterworks-events SNS topic (scripts/localstack-init.sh). The consumer maps bus events → webhook events (file_shared→file.shared, document_updated→document.updated, comment_added→comment.added), accepting both event_type (Python/Kotlin publishers) and eventType (Rust file-service). Unknown/unparseable events are acked and dropped; a message is acked only after every matching delivery row is durably inserted (otherwise SQS redelivers), and (subscription_id, source_message_id) is unique so redelivery never double-fans-out.
Persistence: own Postgres schema webhook (subscriptions, deliveries, delivery_attempts), golang-migrate migrations embedded and applied on boot. Secrets are whsec_<32 random bytes hex>, stored for signing, returned only on POST /subscriptions.
Delivery worker: claims due rows with a lease (UPDATE … FROM (SELECT … FOR UPDATE SKIP LOCKED) … SET next_attempt_at = now() + lease RETURNING id) so an in-flight delivery can't be double-sent, POSTs {id, event, created_at, data} with
X-OtterWorks-Signature: sha256=HMAC_SHA256(secret, "<unix_ts>.<body>"), X-OtterWorks-Event, X-OtterWorks-Delivery-Id, X-OtterWorks-Timestamp; every attempt is recorded; non-2xx/transport errors retry with backoff 2s·2^(n-1) (2,4,8,16s) up to 5 attempts, then status=failed (dead-letter).
SSRF guard: target_url must be http/https and (unless ALLOW_PRIVATE_TARGETS=true) must not be localhost or resolve to loopback/private/link-local/metadata IPs; the worker's dialer re-checks resolved IPs at connect time and never follows redirects. Compose sets ALLOW_PRIVATE_TARGETS=true because the demo sink lives on the compose network.
Headless middleware: forces Content-Type: application/json on every response, strips any Set-Cookie, returns JSON 406 when Accept is HTML-only, JSON 404/405 for unknown routes/methods.
Sink (stdlib only): logs every POST, verifies the HMAC when WEBHOOK_SECRET is set (5-min timestamp tolerance), GET /received returns the last 500 items, FAIL_MODE=1 returns 500 while still recording.

Wiring: WebhookServiceURL + /api/v1/webhooks route and metrics normalizer in api-gateway; webhook-service/webhook-sink services in docker-compose.yml (sink takes WEBHOOK_SINK_FAIL_MODE / WEBHOOK_SINK_SECRET); webhook-service + always-on webhook-headless-proof CI jobs; make test/make lint/make demo-webhooks/make assert-headless; ARCHITECTURE.md section; service README.

Config knobs (env): DELIVERY_MAX_ATTEMPTS=5, DELIVERY_BASE_BACKOFF=2s, DELIVERY_TIMEOUT=5s, DELIVERY_CLAIM_LEASE=60s, ALLOW_PRIVATE_TARGETS=false, WORKER_POLL_INTERVAL=1s, SQS_ENABLED, SQS_QUEUE_URL.

Headless proof

BASE_REF=origin/main scripts/assert-headless.sh:

PASS: no forbidden UI directories
PASS: no browser UI file extensions
PASS: no package.json or UI framework dependencies
PASS: no html/template imports
PASS: no frontend paths in diff

Smoke tests (go test -run 'Headless|Contract|OpenAPI' -v ./... — walks every registered route asserting application/json, no Set-Cookie, valid JSON body; GET /, GET /nope → 404; HTML-only Accept → 406; OpenAPI paths == registered routes):

=== RUN   TestHeadlessRoutes
--- PASS: TestHeadlessRoutes (0.00s)
=== RUN   TestOpenAPIIsReadable
--- PASS: TestOpenAPIIsReadable (0.00s)
ok  	.../webhook-service/internal/httpapi	0.003s

Live smoke against the running stack:

$ curl -si http://localhost:8092/
HTTP/1.1 404 Not Found
Content-Type: application/json
{"error":"not found"}

$ curl -si -H 'Accept: text/html' http://localhost:8092/health
HTTP/1.1 406 Not Acceptable
Content-Type: application/json
{"accepts":["application/json"],"error":"not acceptable"}

$ curl -si http://localhost:8092/health
HTTP/1.1 200 OK
Content-Type: application/json
{"status":"healthy","version":"0.1.0"}

$ curl -si http://localhost:8080/api/v1/webhooks/subscriptions   # via gateway, no JWT
HTTP/1.1 401 Unauthorized
Content-Type: application/json
{"error":"missing or invalid authorization header"}

No Set-Cookie header appeared in any response. openapi-spec-validator services/webhook-service/openapi.yaml passes (also run in CI).

Local demo (`make up` then `./scripts/demo-webhooks.sh`, run against the local stack)

Excerpt (full transcript is 746 lines; repeated poll iterations and duplicate sink dumps elided):

=== 1) login ===
using account: webhook-demo@otterworks.dev
=== 2) register partner and create subscription ===
{
  "id": "34aedd8b-121a-4d9c-8f13-1a43710b712f",
  "secret": "whsec_85fbbf7fe5f70eb93a4de68181b22cd2743970ad050b68cc06090a4e0953ecf4",
  "target_url": "http://webhook-sink:8093/",
  "event_types": [
    "file.shared",
    "document.updated",
    "comment.added"
  ]
}
=== 3) restart sink with the secret ===
time="2026-09-10T14:02:12Z" level=warning msg="/home/ubuntu/repos/otterworks/docker-compose.infra.yml: the attribute `version` is obsolete, it will be ignored, please remove it to avoid potential confusion"
time="2026-09-10T14:02:12Z" level=warning msg="/home/ubuntu/repos/otterworks/docker-compose.yml: the attribute `version` is obsolete, it will be ignored, please remove it to avoid potential confusion"
 Container otterworks-webhook-sink Recreate 
 Container otterworks-webhook-sink Recreated 
 Container otterworks-webhook-sink Starting 
 Container otterworks-webhook-sink Started 
=== 4) test ping ===
{
  "delivery_id": "90598d72-381c-4a16-bde0-755c293ef4ba",
  "status": "pending"
}
{
  "count": 1,
  "fail_mode": false,
  "items": [
    {
      "received_at": "2026-09-10T14:02:13.349519043Z",
      "event": "webhook.ping",
      "delivery_id": "90598d72-381c-4a16-bde0-755c293ef4ba",
      "timestamp": "1789048933",
      "signature_valid": true,
      "headers": {
        "delivery_id": "90598d72-381c-4a16-bde0-755c293ef4ba",
        "event": "webhook.ping",
        "signature": "sha256=79de718c6ccf98a776a39283479e9c8b54bc1f0408609abb8f0171f0a577e5b9",
        "timestamp": "1789048933"
      },
      "body": {
        "created_at": "2026-09-10T14:02:12.874982Z",
        "data": {
          "message": "ping",
          "subscription_id": "34aedd8b-121a-4d9c-8f13-1a43710b712f"
        },
        "event": "webhook.ping",
        "id": "90598d72-381c-4a16-bde0-755c293ef4ba"
      }
    }
  ]
}
... (file.shared sink items, deliveries listing elided) ...
=== 5) upload and share a file ===
{
  "share": {
    "id": "13945ca4-0928-42a9-b9f3-6d4fcc7a3a4c",
    "file_id": "3b227316-c77b-43c3-9bbd-9854fca651c4",
    "shared_with": "ab10e770-1755-42a5-b26d-25eefa827a5b",
    "permission": "viewer",
      "event": "file.shared",
      "delivery_id": "72610e34-8ecc-4325-8925-d4299a13a1b2",
      "timestamp": "1789048934",
      "signature_valid": true,
      "headers": {
        "delivery_id": "72610e34-8ecc-4325-8925-d4299a13a1b2",
        "event": "file.shared",
        "signature": "sha256=9a06326716c9edc81a4ee144283288ce863adc63253083f977cbda18bb8f6d16",
        "timestamp": "1789048934"
      },
      "body": {
        "created_at": "2026-09-10T14:02:14.290015Z",
        "data": {
          "data": {
            "fileId": "3b227316-c77b-43c3-9bbd-9854fca651c4",
            "ownerId": "a633143d-676e-4714-90ba-e6cf696196da",
            "folderId": null,
            "sharedWithUserId": "ab10e770-1755-42a5-b26d-25eefa827a5b"
          },
          "event": "file.shared",
          "occurred_at": "2026-09-10T14:02:14.275534778Z",
          "source_event_type": "file_shared"
        },
        "event": "file.shared",
        "id": "72610e34-8ecc-4325-8925-d4299a13a1b2"
      }
    }
  ]
}
=== 7) fail-mode retry demonstration ===
time="2026-09-10T14:02:15Z" level=warning msg="/home/ubuntu/repos/otterworks/docker-compose.infra.yml: the attribute `version` is obsolete, it will be ignored, please remove it to avoid potential confusion"
time="2026-09-10T14:02:15Z" level=warning msg="/home/ubuntu/repos/otterworks/docker-compose.yml: the attribute `version` is obsolete, it will be ignored, please remove it to avoid potential confusion"
 Container otterworks-webhook-sink Recreate 
 Container otterworks-webhook-sink Recreated 
 Container otterworks-webhook-sink Starting 
 Container otterworks-webhook-sink Started 
{
  "delivery_id": "c5a3c1d8-04ca-4600-b02c-7decc8a96901",
  "status": "pending"
... (poll iterations elided) ...
[
  {
    "id": "c5a3c1d8-04ca-4600-b02c-7decc8a96901",
    "status": "failed",
    "attempts": 5,
    "last_error": "partner returned HTTP 500"
  },
  {
    "id": "72610e34-8ecc-4325-8925-d4299a13a1b2",
    "status": "delivered",
    "attempts": 1,
    "last_error": null
  },
  {
    "id": "90598d72-381c-4a16-bde0-755c293ef4ba",
    "status": "delivered",
    "attempts": 1,
    "last_error": null
  }
]
=== 8) restore sink ===

Notes on the transcript: the sink container persists across demo re-runs, so /received also lists file.shared items from earlier subscriptions whose secret differs from the one the sink was restarted with — those correctly show signature_valid: false; the current run's ping and file.shared both verify true. The seeded admin@otterworks.dev login returns Invalid credentials on this stack (untouched — possibly planted), so the script falls back to registering webhook-demo@otterworks.dev.

Verification

go vet ./... && go test -race ./..., golangci-lint run — service and sink: pass.
Postgres integration test (WEBHOOK_TEST_DATABASE_URL=… go test ./internal/store/): migrations idempotent, lease prevents immediate re-claim, attempt/retry/failed/delivered lifecycle — pass.
api-gateway go test ./... pass; docker compose config valid; both images build.
make test: API Gateway, Auth, File Service sections pass, then stops at Document Service with pytest: command not found — identical failure on origin/main in this environment (tooling gap, not this branch).
make lint: stops at pre-existing api-gateway errcheck findings (internal/health/handler.go, internal/middleware/jwt.go, cors_test.go) — identical on origin/main; not fixed here per the "don't modify existing services beyond wiring" constraint. Webhook-service and sink lint clean.
Deployment scope: localhost/compose only, as requested — no Helm chart / Terraform queue / deploy-dev.sh entry for webhook-service (tenant eventing is disabled by policy anyway); the gateway route is inert on EKS until that is added.
Not touched: frontend/**, any planted bug, any existing service beyond the gateway route/metrics + compose/CI wiring.

Link to Devin session: https://partner-workshops.devinenterprise.com/sessions/f9bb76780f104722ae9f20e1b0e11adb
Open in Devin Desktop: https://partner-workshops.devinenterprise.com/desktop/session/f9bb76780f104722ae9f20e1b0e11adb?variant=devin
Requested by: @mbatchelor81

devin-ai-integration · 2026-09-10T14:04:48Z

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devin-ai-integration Bot added 7 commits September 10, 2026 13:32

feat(webhook): add outbound webhook service

88221c4

feat(webhook): add standalone demo sink

7a4ce1b

feat(webhook): wire service into local stack and CI

9b12d4d

docs(webhook): document service and routes

9df0c69

fix(webhook): lease deliveries and harden runtime

5c52e14

fix(webhook): parse file service event payloads

f5b27cb

fix(webhook): make demo login self-healing

9bad3c0

devin-ai-integration Bot assigned mbatchelor81 Sep 10, 2026

devin-ai-integration Bot added 2 commits September 10, 2026 14:07

fix(webhook): upgrade vulnerable Go dependencies

9343b0a

ci: pin actions in webhook workflow changes

869c4c6

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fix(webhook): harden consumption and target delivery

e07c24d

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fix(webhook): limit subscription request sizes

779daa4

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fix(webhook): parallelize delivery batches

151f7ca

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feat: headless webhook-service for outbound partner webhooks - #1547

feat: headless webhook-service for outbound partner webhooks#1547
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Summary

Headless proof

Local demo (make up then ./scripts/demo-webhooks.sh, run against the local stack)

Verification

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devin-ai-integration Bot commented Sep 10, 2026 •

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Local demo (`make up` then `./scripts/demo-webhooks.sh`, run against the local stack)