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package server |
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|
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import ( |
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"fmt" |
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"log/slog" |
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"os" |
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"path/filepath" |
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|
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"github.com/gofiber/fiber/v2" |
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"github.com/gofiber/fiber/v2/middleware/recover" |
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|
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"github.com/lain/larc/internal/core" |
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"github.com/lain/larc/internal/repo" |
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) |
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|
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/* Larc server (larcs) - serves repositories over HTTP. |
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* Features: |
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* - README.md rendered as HTML |
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* - Basic Auth via htpasswd |
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* - Per-repo access control |
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* - JSON API for client operations */ |
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|
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// Server is the larc HTTP server |
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type Server struct { |
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app *fiber.App |
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config *Config |
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repos map[string]*repo.Repository // repo name -> repository |
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} |
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|
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// New creates a new server instance |
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func New(config *Config) (*Server, error) { |
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/* setup logging */ |
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setupLogging(config.Logging) |
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|
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/* validate config */ |
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if err := config.Validate(); err != nil { |
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return nil, fmt.Errorf("invalid config: %w", err) |
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} |
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|
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/* create fiber app */ |
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app := fiber.New(fiber.Config{ |
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AppName: "larcs", |
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DisableStartupMessage: true, |
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ErrorHandler: errorHandler, |
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}) |
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|
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/* global middleware */ |
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app.Use(recover.New()) |
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app.Use(LoggingMiddleware()) |
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|
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/* optional auth for all routes */ |
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if config.Auth.Enabled { |
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app.Use(OptionalAuthMiddleware(config.Auth.HtpasswdFile)) |
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} else { |
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app.Use(func(c *fiber.Ctx) error { |
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c.Locals("username", "") |
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return c.Next() |
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}) |
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} |
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|
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s := &Server{ |
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app: app, |
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config: config, |
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repos: make(map[string]*repo.Repository), |
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} |
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|
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/* load repositories */ |
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if err := s.loadRepos(); err != nil { |
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return nil, fmt.Errorf("load repos: %w", err) |
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} |
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|
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/* setup routes */ |
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s.setupRoutes() |
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|
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return s, nil |
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} |
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|
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func (s *Server) loadRepos() error { |
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for _, repoCfg := range s.config.Repos { |
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repoPath := filepath.Join(s.config.Storage.Root, repoCfg.Path) |
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|
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/* check if repo exists */ |
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larcDir := filepath.Join(repoPath, repo.LarcDir) |
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if _, err := os.Stat(larcDir); os.IsNotExist(err) { |
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slog.Warn("repository not initialized", "name", repoCfg.Name, "path", repoPath) |
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continue |
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} |
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|
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r, err := repo.Open(repoPath) |
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if err != nil { |
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slog.Error("failed to open repository", "name", repoCfg.Name, "error", err) |
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continue |
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} |
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|
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s.repos[repoCfg.Name] = r |
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slog.Info("loaded repository", "name", repoCfg.Name, "path", repoPath) |
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} |
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|
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return nil |
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} |
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|
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func (s *Server) setupRoutes() { |
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/* git smart HTTP routes (must be before other routes for .git suffix matching) */ |
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s.app.Get("/:repo.git/info/refs", s.handleGitInfoRefs) |
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s.app.Post("/:repo.git/git-upload-pack", s.handleGitUploadPack) |
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s.app.Post("/:repo.git/git-receive-pack", s.handleGitReceivePack) |
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|
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/* also support without .git suffix for convenience */ |
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s.app.Get("/:repo/info/refs", s.handleGitInfoRefs) |
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s.app.Post("/:repo/git-upload-pack", s.handleGitUploadPack) |
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s.app.Post("/:repo/git-receive-pack", s.handleGitReceivePack) |
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|
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/* browser routes (HTML) */ |
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s.app.Get("/:repo", s.handleRepoIndex) |
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s.app.Get("/:repo/tree/:rev/*", s.handleTree) |
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s.app.Get("/:repo/blob/:rev/*", s.handleBlob) |
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s.app.Get("/:repo/log", s.handleLog) |
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|
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/* API routes (JSON) */ |
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api := s.app.Group("/api") |
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api.Get("/:repo/info", s.handleAPIInfo) |
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api.Get("/:repo/rev/latest", s.handleAPILatestRev) |
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api.Get("/:repo/rev/:num", s.handleAPIRevision) |
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api.Get("/:repo/tree/:num", s.handleAPITree) |
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api.Get("/:repo/branches", s.handleAPIBranches) |
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api.Get("/:repo/blob/:hash", s.handleAPIBlob) |
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|
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/* write operations require auth */ |
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if s.config.Auth.Enabled { |
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writeAPI := api.Group("/:repo", RepoAccessMiddleware(s.config, true)) |
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writeAPI.Post("/blob", s.handleAPIUploadBlob) |
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writeAPI.Post("/commit", s.handleAPICommit) |
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} |
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} |
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|
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func (s *Server) getRepo(c *fiber.Ctx) (*repo.Repository, *RepoConfig, error) { |
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repoName := c.Params("repo") |
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|
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repoCfg := s.config.GetRepoConfig(repoName) |
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if repoCfg == nil { |
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return nil, nil, fiber.NewError(fiber.StatusNotFound, "Repository not found") |
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} |
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|
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r, ok := s.repos[repoName] |
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if !ok { |
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return nil, nil, fiber.NewError(fiber.StatusNotFound, "Repository not initialized") |
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} |
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|
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/* check access */ |
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username, _ := c.Locals("username").(string) |
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if !repoCfg.IsUserAllowed(username, false) { |
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if username == "" { |
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c.Set("WWW-Authenticate", `Basic realm="`+s.config.Auth.Realm+`"`) |
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return nil, nil, fiber.NewError(fiber.StatusUnauthorized, "Authentication required") |
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} |
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return nil, nil, fiber.NewError(fiber.StatusForbidden, "Access denied") |
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} |
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|
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return r, repoCfg, nil |
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} |
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|
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// Start starts the server |
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func (s *Server) Start() error { |
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addr := fmt.Sprintf("%s:%d", s.config.Server.Host, s.config.Server.Port) |
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slog.Info("starting server", "addr", addr, "tls", s.config.Server.TLS.Enabled) |
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|
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if s.config.Server.TLS.Enabled { |
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return s.app.ListenTLS(addr, s.config.Server.TLS.Cert, s.config.Server.TLS.Key) |
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} |
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return s.app.Listen(addr) |
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} |
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|
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// Shutdown gracefully shuts down the server |
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func (s *Server) Shutdown() error { |
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/* close all repositories */ |
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for name, r := range s.repos { |
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if err := r.Close(); err != nil { |
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slog.Error("failed to close repository", "name", name, "error", err) |
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} |
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} |
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return s.app.Shutdown() |
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} |
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|
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func setupLogging(cfg LoggingConfig) { |
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var level slog.Level |
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switch cfg.Level { |
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case "debug": |
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level = slog.LevelDebug |
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case "warn": |
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level = slog.LevelWarn |
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case "error": |
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level = slog.LevelError |
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default: |
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level = slog.LevelInfo |
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} |
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|
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var handler slog.Handler |
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opts := &slog.HandlerOptions{Level: level} |
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|
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output := os.Stdout |
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if cfg.File != "" { |
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f, err := os.OpenFile(cfg.File, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0644) |
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if err == nil { |
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output = f |
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} |
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} |
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|
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if cfg.Format == "text" { |
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handler = slog.NewTextHandler(output, opts) |
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} else { |
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handler = slog.NewJSONHandler(output, opts) |
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} |
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|
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slog.SetDefault(slog.New(handler)) |
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} |
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|
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func errorHandler(c *fiber.Ctx, err error) error { |
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code := fiber.StatusInternalServerError |
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msg := "Internal Server Error" |
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|
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if e, ok := err.(*fiber.Error); ok { |
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code = e.Code |
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msg = e.Message |
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} |
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|
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slog.Error("request error", "path", c.Path(), "code", code, "error", err) |
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|
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if c.Get("Accept") == "application/json" { |
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return c.Status(code).JSON(fiber.Map{"error": msg}) |
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} |
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return c.Status(code).SendString(msg) |
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} |
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|
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/* NOTE(kroot): suppress unused import */ |
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var _ = core.DefaultBranchName |
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|