Add on-demand preview URLs with custom domains#18
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Preview URLs are now created explicitly via the SDK (createPreviewURL/
getPreviewURL/deletePreviewURL) rather than auto-assigned on sandbox
creation. Each preview URL registers a Cloudflare custom hostname
(e.g. sb-xxx.openlovable.cc) for per-sandbox routing through the org's
verified custom domain.
Key changes:
- DB migrations for org custom domains and sandbox_preview_urls table
- Cloudflare client for custom hostname CRUD and domain verification
- API endpoints: POST/GET/DELETE /api/sandboxes/:id/preview
- Dashboard UI for custom domain setup with DNS verification flow
- Proxy routing: both SandboxProxy and ControlPlaneProxy resolve
custom hostnames via DB lookup fallback
- ControlPlaneProxy rewrites Host header to {sandboxID}.{baseDomain}
so workers can match custom domain requests
- Auto-cleanup of preview URLs on sandbox kill
- TypeScript and Python SDK methods for preview URL management
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Remove automatic domain routing from sandboxes. Preview URLs are now the
only way to get HTTP access, each targeting a specific port. Hostname
format {sandboxID}-p{port}.{baseDomain} lets the proxy parse sandbox ID
and port directly — zero DB lookups on the hot path.
- Add DB migration for port column + unique constraint
- Add ContainerAddr to Manager interface (Podman + Firecracker)
- Rewrite proxy to parse hostname instead of DB lookup
- Add friendly HTML placeholder page for upstream unavailable (auto-refresh)
- Update API handlers: create/list/delete preview URLs by port
- Update dashboard, SDKs (TypeScript + Python), and types
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
When an org has a custom domain configured, the dashboard now shows preview URLs using the custom domain (e.g. sb-xxx-p3000.openlovable.cc) as the primary link, with a collapsible "Internal URLs" section showing the base domain URLs underneath. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
motatoes
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Mar 27, 2026
Add on-demand preview URLs with custom domains
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Summary
sb-xxx.openlovable.cc) created explicitly via the SDK, not auto-assigned on creationcreatePreviewURL/getPreviewURL/deletePreviewURL) and Python SDK methodsChanges
internal/cloudflare/— new CF API client for custom hostname CRUD and domain verificationinternal/db/migrations/— org custom domain columns +sandbox_preview_urlstableinternal/db/store.go— preview URL CRUD + org domain queriesinternal/api/sandbox.go— 3 new API endpoints + auto-cleanup on killinternal/api/dashboard.go— custom domain setup + verification pollinginternal/proxy/— DB hostname lookup fallback + Host header rewrite in ControlPlaneProxysdks/typescript/src/sandbox.ts— 3 new SDK methodssdks/python/opencomputer/sandbox.py— 3 new SDK methodsweb/src/pages/Settings.tsx— custom domain UI with DNS instructionsTest plan
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