239 lines
6.9 KiB
Go
239 lines
6.9 KiB
Go
package home
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import (
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"bytes"
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"context"
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"errors"
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"fmt"
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"io"
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"io/fs"
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"log"
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"net"
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"net/http"
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"os"
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"strings"
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"time"
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"golang.org/x/text/language"
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"source.toby3d.me/toby3d/home/internal/common"
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"source.toby3d.me/toby3d/home/internal/domain"
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"source.toby3d.me/toby3d/home/internal/entry"
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pagefsrepo "source.toby3d.me/toby3d/home/internal/entry/repository/fs"
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pageucase "source.toby3d.me/toby3d/home/internal/entry/usecase"
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"source.toby3d.me/toby3d/home/internal/middleware"
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resourcefsrepo "source.toby3d.me/toby3d/home/internal/resource/repository/fs"
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resourceucase "source.toby3d.me/toby3d/home/internal/resource/usecase"
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servercase "source.toby3d.me/toby3d/home/internal/server/usecase"
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sitefsrepo "source.toby3d.me/toby3d/home/internal/site/repository/fs"
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siteucase "source.toby3d.me/toby3d/home/internal/site/usecase"
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staticfsrepo "source.toby3d.me/toby3d/home/internal/static/repository/fs"
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staticucase "source.toby3d.me/toby3d/home/internal/static/usecase"
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themefsrepo "source.toby3d.me/toby3d/home/internal/theme/repository/fs"
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themeucase "source.toby3d.me/toby3d/home/internal/theme/usecase"
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"source.toby3d.me/toby3d/home/internal/urlutil"
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)
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type App struct {
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server *http.Server
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}
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func NewApp(logger *log.Logger, config *domain.Config) (*App, error) {
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themeDir := os.DirFS(config.ThemeDir)
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partialsDir, err := fs.Sub(themeDir, "partials")
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if err != nil {
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return nil, fmt.Errorf("cannot substitute into partials subdirectory: %w", err)
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}
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contentDir := os.DirFS(config.ContentDir)
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resources := resourcefsrepo.NewFileServerResourceRepository(contentDir)
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sites := sitefsrepo.NewFileSystemSiteRepository(contentDir)
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siter := siteucase.NewSiteUseCase(sites, resources)
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staticDir := os.DirFS(config.StaticDir)
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statics := staticfsrepo.NewFileServerStaticRepository(staticDir)
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staticer := staticucase.NewStaticUseCase(statics)
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resourcer := resourceucase.NewResourceUseCase(resources)
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themes := themefsrepo.NewFileSystemThemeRepository(themeDir)
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themer := themeucase.NewThemeUseCase(partialsDir, themes)
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entries := pagefsrepo.NewFileSystemPageRepository(contentDir)
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entrier := pageucase.NewEntryUseCase(entries, resources)
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serverer := servercase.NewServerUseCase(sites)
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handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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// NOTE(toby3d): any static file is public and unprotected by
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// design, so it's safe to search it first before deep down to
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// any page or it's resource which might be protected by
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// middleware or something else.
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if static, err := staticer.Do(r.Context(), strings.TrimPrefix(r.URL.Path, "/")); err == nil {
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http.ServeContent(w, r, static.Name(), static.ModTime(), static)
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return
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}
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lang := domain.LanguageUnd
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// NOTE(toby3d): read $HOME_CONTENT_DIR/index.md as a source of
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// truth and global settings for any child entry.
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s, err := siter.Do(r.Context(), lang)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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if s.IsMultiLingual() {
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// NOTE(toby3d): $HOME_CONTENT_DIR contains at least two
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// index.md with different language codes.
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head, tail := urlutil.ShiftPath(r.URL.Path)
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if head == "" {
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// NOTE(toby3d): client request just '/', try to
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// understand which language subdirectory is
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// need to redirect.
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supported := make([]language.Tag, len(s.Languages))
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for i := range s.Languages {
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supported[i] = language.Make(s.Languages[i].Lang())
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}
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if s.DefaultLanguage != domain.LanguageUnd {
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supported = append([]language.Tag{language.Make(s.DefaultLanguage.Code())},
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supported...)
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}
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requested, _, err := language.ParseAcceptLanguage(r.Header.Get(
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common.HeaderAcceptLanguage))
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if err != nil || len(requested) == 0 {
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requested = append(requested, language.English)
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}
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matched, _, _ := language.NewMatcher(supported).Match(requested...)
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lang = domain.NewLanguage(matched.String())
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http.Redirect(w, r, "/"+lang.Lang()+"/", http.StatusSeeOther)
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return
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}
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// NOTE(toby3d): client request '/:something/...', try
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// to understand which language code in subdir is
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// requested.
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if lang = domain.NewLanguage(head); lang != domain.LanguageUnd {
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r.URL.Path = tail
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}
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// NOTE(toby3d): get localized site config for requested
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// subdir if exists.
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if s, err = siter.Do(r.Context(), lang); err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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}
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// NOTE(toby3d): search entry for requested URL and language
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// code in subdir.
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e, err := entrier.Do(r.Context(), lang, r.URL.Path)
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if err != nil {
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if !errors.Is(err, entry.ErrNotExist) {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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// NOTE(toby3d): maybe it is not a entry, but is't
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// resource?
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res, err := resourcer.Do(r.Context(), r.URL.Path)
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if err != nil {
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if errors.Is(err, fs.ErrNotExist) {
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http.Error(w, err.Error(), http.StatusNotFound)
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return
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}
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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// TODO(toby3d) : ugly workaround, must be refactored
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resFile, err := contentDir.Open(res.File.Path())
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if err != nil {
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http.Error(w, "cannot open: "+err.Error(), http.StatusInternalServerError)
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return
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}
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defer resFile.Close()
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resBytes, err := io.ReadAll(resFile)
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if err != nil {
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http.Error(w, "cannot read all: "+err.Error(), http.StatusInternalServerError)
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return
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}
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defer resFile.Close()
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http.ServeContent(w, r, res.Name(), domain.ResourceModTime(res), bytes.NewReader(resBytes))
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return
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}
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// NOTE(toby3d): wrap founded entry into theme template and
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// answer to client.
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contentLanguage := make([]string, len(e.Translations))
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for i := range e.Translations {
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contentLanguage[i] = e.Translations[i].Language.Code()
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}
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w.Header().Set(common.HeaderContentLanguage, strings.Join(contentLanguage, ", "))
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template, err := themer.Do(r.Context(), s, e)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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w.Header().Set(common.HeaderContentType, common.MIMETextHTMLCharsetUTF8)
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if err = template(w); err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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}
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})
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chain := middleware.Chain{
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middleware.LogFmt(),
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middleware.Redirect(middleware.RedirectConfig{
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Serverer: serverer,
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}),
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middleware.Header(middleware.HeaderConfig{
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Serverer: serverer,
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}),
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}
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return &App{server: &http.Server{
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Addr: config.AddrPort().String(),
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Handler: chain.Handler(handler),
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ErrorLog: logger,
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WriteTimeout: 500 * time.Millisecond,
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}}, nil
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}
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func (a *App) Run(ln net.Listener) error {
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var err error
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if ln != nil {
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err = a.server.Serve(ln)
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} else {
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err = a.server.ListenAndServe()
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}
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if err != nil {
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return fmt.Errorf("cannot listen and serve server: %w", err)
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}
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return nil
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}
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func (a *App) Stop(ctx context.Context) error {
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if err := a.server.Shutdown(ctx); err != nil {
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return fmt.Errorf("failed to shutdown app: %w", err)
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}
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return nil
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}
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