docs(web): document CORS wildcard rejection + env-gated convention; align to v1.1.3
This commit is contained in:
@@ -6,6 +6,20 @@ This module adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html
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---
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## [1.1.3] — 2026-08-08
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Patch — CORS documentation discoverability.
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### Fixed
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- `mw.CORS` and `CORSAllowAll` doc comments now document the `"*"` rejection (panic) and the
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env-gated CORS convention (`local -> CORSAllowAll`, else `mw.CORS(origins)`), so `search_symbols`
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surfaces it — previously the convention lived only in code comments and the wire example.
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### Changed
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- Bumped `contracts`, `core` to v1.1.3.
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## [1.1.2] — 2026-08-08
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Patch — CORS wildcard hardening plus documentation fixes.
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@@ -1,6 +1,6 @@
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# einherjar/web
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[](https://code.nochebuena.dev/einherjar/web)
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[](https://code.nochebuena.dev/einherjar/web)
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[](LICENSE)
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[](https://go.dev)
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@@ -3,8 +3,8 @@ module code.nochebuena.dev/einherjar/web
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go 1.26
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require (
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code.nochebuena.dev/einherjar/contracts v1.1.2
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code.nochebuena.dev/einherjar/core v1.1.2
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code.nochebuena.dev/einherjar/contracts v1.1.3
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code.nochebuena.dev/einherjar/core v1.1.3
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github.com/go-chi/chi/v5 v5.2.1
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github.com/google/uuid v1.6.0
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golang.org/x/time v0.11.0
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@@ -1,7 +1,7 @@
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code.nochebuena.dev/einherjar/contracts v1.1.2 h1:LNAFCKQjpNjkCyMid2AgkhDPPzOx8dvpRqqZ7F3zpo0=
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code.nochebuena.dev/einherjar/contracts v1.1.2/go.mod h1:ccltUtrFb5+MEJdkx2VVEUL+xC5pupVlVVsMM8AlCWI=
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code.nochebuena.dev/einherjar/core v1.1.2 h1:iYU2fIWtnyOYFbTMD92NaLJMye4XgZHXWhEjB3iS7lo=
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code.nochebuena.dev/einherjar/core v1.1.2/go.mod h1:Y7qZ9nri9Ydey3+40yz75KErOvOUjRSoffdykXbncsw=
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code.nochebuena.dev/einherjar/contracts v1.1.3 h1:rBtQUVCeqaIKMcG1+R0ndHM/4cRm3XTFnVNzFTbf1QU=
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code.nochebuena.dev/einherjar/contracts v1.1.3/go.mod h1:ccltUtrFb5+MEJdkx2VVEUL+xC5pupVlVVsMM8AlCWI=
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code.nochebuena.dev/einherjar/core v1.1.3 h1:MjWUA/hJ5IOosACh0in9xzFZ7jc1TTO0YEHh1xQVuOg=
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code.nochebuena.dev/einherjar/core v1.1.3/go.mod h1:xkI2uQ4S0FQHbFiawTUFgJdG5jbivcZpGFddHxQe8Q0=
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github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
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github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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github.com/gabriel-vasile/mimetype v1.4.12 h1:e9hWvmLYvtp846tLHam2o++qitpguFiYCKbn0w9jyqw=
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+22
-8
@@ -7,13 +7,23 @@ const (
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allowedHeaders = "Content-Type, Authorization, X-Request-ID"
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)
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// CORS sets cross-origin resource sharing headers for the provided origins.
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// Returns 204 No Content for OPTIONS preflight requests.
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// Pass the outermost origins first; an empty slice is a no-op.
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// CORS sets cross-origin resource sharing headers for the provided origins
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// (exact match; an empty slice is a no-op). Returns 204 No Content for OPTIONS
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// preflight requests.
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//
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// It panics on "*": a wildcard matches no real Origin here, so passing it would
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// silently disable CORS. For allow-all use [CORSAllowAll] (development only). The
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// recommended wiring gates CORS by environment:
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//
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// var corsMW func(http.Handler) http.Handler
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// if strings.EqualFold(cfg.AppEnv, "local") {
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// corsMW = mw.CORSAllowAll() // dev: any origin
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// } else {
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// corsMW = mw.CORS(cfg.AllowedOrigins) // prod: explicit origins
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// }
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func CORS(origins []string) func(http.Handler) http.Handler {
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// "*" is a silent no-op here (exact-match only) — reject it loudly at
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// construction so a misconfigured service fails to boot instead of quietly
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// blocking every browser. For allow-all, call CORSAllowAll (development only).
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// "*" would be a silent no-op (exact-match only) — reject it loudly so a
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// misconfigured service fails to boot instead of quietly blocking browsers.
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for _, o := range origins {
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if o == "*" {
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panic(`mw.CORS: "*" is not a valid origin — list explicit origins, or use CORSAllowAll() for allow-all`)
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@@ -46,8 +56,12 @@ func CORS(origins []string) func(http.Handler) http.Handler {
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}
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}
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// CORSAllowAll is a convenience wrapper that allows any origin.
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// Use only in development — never in production.
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// CORSAllowAll allows any origin by reflecting the request Origin (it does not set
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// Access-Control-Allow-Credentials). Development only — never in production.
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//
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// Use it for the local branch of the env-gated CORS convention; use [CORS] with
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// explicit origins everywhere else. Because [CORS] panics on "*", CORSAllowAll — not
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// a "*" in the origins list — is the way to allow all.
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func CORSAllowAll() func(http.Handler) http.Handler {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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