all repos — elgit @ e70b90b4b86f672eb9ccf9a768e083edef73395e

fork of legit: web frontend for git, written in go

routes/handler.go (view raw)

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package routes

import (
	"io/fs"
	"log"
	"net/http"
	"path"
	"path/filepath"
	"strings"

	"github.com/dimfeld/httptreemux/v5"
	"github.com/fsnotify/fsnotify"

	"alin.ovh/elgit/config"
)

// Checks for gitprotocol-http(5) specific smells; if found, passes
// the request on to the git http service, else render the web frontend.
func (d *deps) Multiplex(w http.ResponseWriter, r *http.Request, params map[string]string) {
	rest := params["rest"]
	switch params["name"] {
	case "info", "git-upload-pack":
		rest = path.Join(params["name"], params["rest"])
		params["name"] = params["category"]
		params["category"] = ""
	}

	if d.isNotAllowed(path.Join(params["category"], params["name"])) {
		d.Write404(w)

		return
	}

	if r.URL.RawQuery == "service=git-receive-pack" {
		w.WriteHeader(http.StatusBadRequest)
		_, err := w.Write([]byte("no pushing allowed!"))
		if err != nil {
			log.Println(err)
			d.Write500(w)

			return
		}

		return
	}

	switch {
	case rest == "info/refs" &&
		r.URL.RawQuery == "service=git-upload-pack" &&
		r.Method == "GET":
		d.InfoRefs(w, r, params)
	case rest == "git-upload-pack" && r.Method == "POST":
		d.UploadPack(w, r, params)
	case r.Method == "GET":
		if fixed, found := strings.CutSuffix(r.URL.Path, "/"); found {
			http.Redirect(w, r, fixed, http.StatusPermanentRedirect)
		} else {
			d.RepoIndex(w, r, params)
		}
	}
}

func Handlers(c *config.Config, staticFiles fs.FS) *httptreemux.TreeMux {
	mux := httptreemux.New()

	plist := filepath.Join(c.Repo.Root, "projects.list")
	projects, err := ReadProjectsList(plist)
	if err != nil {
		log.Fatal(err)
	}

	d := deps{
		c,
		projects,
	}

	watcher, err := fsnotify.NewWatcher()
	if err != nil {
		log.Fatal(err)
	}

	err = watcher.Add(plist)
	if err != nil {
		log.Fatal(err)
	}

	go func() {
		for {
			select {
			case event, ok := <-watcher.Events:
				if !ok {
					continue
				}
				if event.Op.Has(fsnotify.Write) {
					d.projects, err = ReadProjectsList(plist)
					if err != nil {
						log.Println(err)
					}
				}
			case err, ok := <-watcher.Errors:
				if !ok {
					continue
				}
				log.Println("error:", err)
			}
		}
	}()

	mux.NotFoundHandler = func(w http.ResponseWriter, _ *http.Request) {
		d.Write404(w)
	}

	mux.RedirectTrailingSlash = false

	mux.GET("/", d.Index)
	mux.NewGroup("/static/").
		UsingContext().
		Handler("GET", "/*", http.FileServerFS(staticFiles))

	d.mountRepoPaths(mux.NewGroup("/:name"))
	d.mountRepoPaths(mux.NewGroup("/:category/:name"))

	return mux
}

func (d deps) mountRepoPaths(group *httptreemux.Group) {
	group.GET("/tree/:ref/*rest", d.RepoTree)
	group.GET("/blob/:ref/*rest", d.FileContent)
	group.GET("/tree/:ref", d.RepoTree)
	group.GET("/tree/:ref/", d.RepoTree)
	group.GET("/blob/:ref/", d.FileContent)
	group.GET("/log/:ref", d.Log)
	group.GET("/archive/:file", d.Archive)
	group.GET("/commit/:ref", d.Diff)
	group.GET("/commit/:ref/*file", d.FileDiff)
	group.GET("/refs/", d.Refs)
	group.GET("", d.Multiplex)
	group.POST("", d.Multiplex)
	group.GET("/", d.Multiplex)
	group.POST("/", d.Multiplex)
	group.GET("/*rest", d.Multiplex)
	group.POST("/*rest", d.Multiplex)
}