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feat(server): embed SPA dist with fallback handler; single-binary deploy
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@@ -35,3 +35,8 @@ Thumbs.db
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# Internal docs (specs / plans should never be committed)
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/docs/superpowers/
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# Embedded SPA dist: ignore real built artifacts but keep the .gitkeep
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# placeholder so `go build ./cmd/server` succeeds before `make build` runs.
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/cmd/server/web/dist/*
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!/cmd/server/web/dist/.gitkeep
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@@ -9,6 +9,7 @@ dev:
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build:
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cd web && pnpm install && pnpm build
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rm -rf cmd/server/web/dist && mkdir -p cmd/server/web/dist && cp -r web/dist/. cmd/server/web/dist/
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go build -o bin/server ./cmd/server
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test:
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@@ -0,0 +1,10 @@
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// Package main 的 embed.go 持有前端构建产物。
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// build 流程会先 pnpm build 再把 web/dist 复制到 cmd/server/web/dist/,
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// go:embed 在编译期把整个目录注入到二进制。.gitkeep 占位文件保证未跑
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// `make build` 时 go build 也能成功(embed 不接受空目录)。
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package main
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import "embed"
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//go:embed all:web/dist
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var distFS embed.FS
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+1
-1
@@ -25,7 +25,7 @@ func main() {
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rootCtx, cancel := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
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defer cancel()
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a, err := app.New(rootCtx, cfg)
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a, err := app.New(rootCtx, cfg, distFS)
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if err != nil {
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_, _ = fmt.Fprintln(os.Stderr, "app new:", err)
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os.Exit(1)
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Vendored
+12
-1
@@ -18,8 +18,10 @@ package app
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import (
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"context"
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"embed"
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"errors"
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"fmt"
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"io/fs"
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"log/slog"
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"net/http"
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"time"
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@@ -43,7 +45,9 @@ type App struct {
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}
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// New 把所有模块按启动顺序拼装好。任何阶段失败都会返回错误,不留半成品资源。
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func New(ctx context.Context, cfg *config.Config) (*App, error) {
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// dist 是 cmd/server 用 //go:embed 注入的前端构建产物,根目录为 web/dist;
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// fs.Sub 之后交给 SPA handler 提供静态文件 + index.html 回退。
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func New(ctx context.Context, cfg *config.Config, dist embed.FS) (*App, error) {
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log := logger.FromEnv(cfg.Env, nil)
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// 跑 migrations 必须在开池前;否则首次启动连不存在的表会让 ping 失败。
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@@ -68,6 +72,12 @@ func New(ctx context.Context, cfg *config.Config) (*App, error) {
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// 通过 App 字段透出去,目前保留局部变量以避免暴露未稳定 API。
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_ = notifyDispatcher
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spaSub, err := fs.Sub(dist, "web/dist")
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if err != nil {
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return nil, fmt.Errorf("sub fs: %w", err)
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}
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spaHandler := httpx.NewSPAHandler(spaSub)
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r := httpx.NewRouter(httpx.RouterDeps{
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HealthCheck: func(req *http.Request) error {
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return db.HealthCheck(req.Context(), pool)
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@@ -75,6 +85,7 @@ func New(ctx context.Context, cfg *config.Config) (*App, error) {
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ReadyCheck: func(req *http.Request) error {
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return db.HealthCheck(req.Context(), pool)
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},
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SPAHandler: spaHandler,
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})
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// chi.Router 接口本身已经声明 Use,无需类型断言到 *chi.Mux。
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@@ -17,6 +17,9 @@ type RouterDeps struct {
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HealthCheck func(*http.Request) error
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// ReadyCheck is invoked from GET /readyz with the same contract.
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ReadyCheck func(*http.Request) error
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// SPAHandler 为 nil 时禁用前端 fallback;非 nil 时挂到 chi NotFound,
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// 把未匹配的请求交给 SPA handler 处理(静态文件 + index.html 回退)。
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SPAHandler http.Handler
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}
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// NewRouter builds the application's chi.Router with the standard
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@@ -46,5 +49,9 @@ func NewRouter(deps RouterDeps) chi.Router {
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_, _ = w.Write([]byte("ok"))
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})
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if deps.SPAHandler != nil {
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r.NotFound(deps.SPAHandler.ServeHTTP)
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}
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return r
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}
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@@ -0,0 +1,34 @@
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// Package httpx 内的 spa.go 提供 SPA 静态资源 + 404 fallback。
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// 命中文件直接 ServeFile;不存在但路径无后缀视为前端路由,回退 index.html;
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// /api/ 前缀始终返回 404(避免把 API 拼写错误掩盖成 HTML)。
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package httpx
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import (
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"errors"
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"io/fs"
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"net/http"
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"strings"
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)
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// NewSPAHandler 把 distFS 暴露成 SPA handler。
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func NewSPAHandler(distFS fs.FS) http.Handler {
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fileServer := http.FileServer(http.FS(distFS))
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if strings.HasPrefix(r.URL.Path, "/api/") {
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http.NotFound(w, r)
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return
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}
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path := strings.TrimPrefix(r.URL.Path, "/")
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if path == "" {
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path = "index.html"
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}
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if _, err := fs.Stat(distFS, path); err != nil {
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if errors.Is(err, fs.ErrNotExist) && !strings.Contains(path, ".") {
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r.URL.Path = "/index.html"
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fileServer.ServeHTTP(w, r)
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return
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}
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}
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fileServer.ServeHTTP(w, r)
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})
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}
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