Files

36 lines
1.1 KiB
Go
Raw Permalink Normal View History

feat(spa-server): initial implementation — SPA/PWA container server (v1.0.0) Introduces code.nochebuena.dev/einherjar/spa-server — a container-first HTTP server for single-page applications and progressive web apps. Produces a Docker base image; downstream SPA Dockerfiles require only a single COPY instruction. Interfaces and types (CT-6: one TypeSpec per file): - Config — Port (EINHERJAR_SPA_PORT, default 8080) and StaticDir (EINHERJAR_SPA_STATIC_DIR, default /srv/www); parsed via os.Getenv - Server — implements lifecycle.Component; registered with launcher.New Implementation: - NewServer(logger, cfg) *Server — returns a lifecycle-managed HTTP server - OnInit: builds http.NewServeMux with GET /health and /* routes - OnStart: binds TCP listener synchronously via net.Listen (port conflicts surface immediately), then serves in a background goroutine - OnStop: graceful shutdown via http.Server.Shutdown with 10s timeout spa.NewHandler(logger, staticDir) http.Handler: - Uses http.Dir.Open for path sanitisation (prevents directory traversal) - File exists and is not a directory → served by http.FileServer - File missing or is a directory → serves index.html (SPA router owns all routes) - Directory listing is disabled health.NewHandler(logger) http.Handler: - Always responds 200 {"status":"UP","components":{}} - Wire format matches web/health.Response without importing the web module - No external checks — process reachability is the only meaningful health signal Config (EINHERJAR_SPA_* env vars): Port(8080), StaticDir(/srv/www) Docker: - Multi-stage: golang:1.26-alpine builder → alpine:3.21 runtime - Image published as: code.nochebuena.dev/einherjar/spa-server:v1.0.0 code.nochebuena.dev/einherjar/spa-server:latest - VOLUME ["/srv/www"] declared; consumer overrides via COPY or volume mount No external dependencies beyond contracts, core, and the Go standard library.
2026-06-02 18:49:05 +00:00
// Package health provides the /health HTTP handler for spa-server.
// The wire format is identical to web/health.Response so responses are
// consistent across all Einherjar modules — without importing the web module.
package health
import (
"encoding/json"
"net/http"
"code.nochebuena.dev/einherjar/contracts/logging"
)
// response mirrors web/health.Response: {"status":"UP","components":{}}.
type response struct {
Status string `json:"status"`
Components map[string]string `json:"components"`
}
type handler struct {
logger logging.Logger
}
// NewHandler returns an http.Handler that always responds 200 UP.
// spa-server has no external dependencies to probe; being reachable is the health check.
func NewHandler(logger logging.Logger) http.Handler {
return &handler{logger: logger}
}
func (h *handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
if err := json.NewEncoder(w).Encode(response{Status: "UP", Components: map[string]string{}}); err != nil {
h.logger.Error("health: encode response", err)
}
}