mugit/internal/handlers/git.go(view raw)
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package handlers
import (
"fmt"
"io"
"log/slog"
"net/http"
"olexsmir.xyz/mugit/internal/git"
"olexsmir.xyz/mugit/internal/git/gitx"
)
// multiplex, check if the request smells like gitprotocol-http(5), if so, it
// passes it to git smart http, otherwise renders templates
func (h *handlers) multiplex(w http.ResponseWriter, r *http.Request) {
if r.URL.RawQuery == "service=git-receive-pack" {
w.WriteHeader(http.StatusBadRequest)
w.Write([]byte("http pushing is not supported"))
return
}
path := r.PathValue("rest")
if path == "info/refs" && r.Method == "GET" && r.URL.RawQuery == "service=git-upload-pack" {
h.infoRefs(w, r)
} else if path == "git-upload-pack" && r.Method == "POST" {
h.uploadPack(w, r)
} else if r.Method == "GET" && path == "" {
h.repoIndex(w, r)
} else {
h.write404(w, nil)
}
}
func (h *handlers) infoRefs(w http.ResponseWriter, r *http.Request) {
path, err := h.checkRepoPublicityAndGetPath(r.PathValue("name"))
if err != nil {
h.write404(w, err)
return
}
w.Header().Set("content-type", "application/x-git-upload-pack-advertisement")
w.WriteHeader(http.StatusOK)
if err := gitx.InfoRefs(r.Context(), path, w); err != nil {
w.WriteHeader(http.StatusInternalServerError)
slog.Error("git: info/refs", "err", err)
return
}
}
func (h *handlers) uploadPack(w http.ResponseWriter, r *http.Request) {
path, err := h.checkRepoPublicityAndGetPath(r.PathValue("name"))
if err != nil {
h.write404(w, err)
return
}
w.Header().Set("Content-Type", "application/x-git-upload-pack-result")
w.Header().Set("Cache-Control", "no-cache")
w.WriteHeader(http.StatusOK)
if err := gitx.UploadPack(r.Context(), path, true, r.Body, newFlushWriter(w)); err != nil {
slog.Error("git: upload-pack", "err", err)
return
}
}
func (h *handlers) archiveHandler(w http.ResponseWriter, r *http.Request) {
ref := h.parseRef(r.PathValue("ref"))
name := r.PathValue("name")
path, err := h.checkRepoPublicityAndGetPath(name)
if err != nil {
h.write404(w, err)
return
}
filename := fmt.Sprintf("%s-%s.tar.gz", name, ref)
w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=%q", filename))
w.Header().Set("Content-Type", "application/gzip")
w.WriteHeader(http.StatusOK)
if err := gitx.ArchiveTar(r.Context(), path, ref, w); err != nil {
slog.Error("git: archive", "ref", ref, "err", err)
return
}
}
func (h *handlers) checkRepoPublicityAndGetPath(name string) (string, error) {
name = git.ResolveName(name)
path, err := git.ResolvePath(h.c.Repo.Dir, name)
if err != nil {
return "", err
}
if _, err := git.OpenPublic(path, ""); err != nil {
return "", err
}
return path, err
}
func (h *handlers) openPublicRepo(name, ref string) (*git.Repo, error) {
name = git.ResolveName(name)
path, err := git.ResolvePath(h.c.Repo.Dir, name)
if err != nil {
return nil, err
}
return git.OpenPublic(path, ref)
}
type flushWriter struct {
w io.Writer
f http.Flusher
}
func newFlushWriter(w http.ResponseWriter) io.Writer {
f, _ := w.(http.Flusher)
return &flushWriter{w: w, f: f}
}
func (fw *flushWriter) Write(p []byte) (int, error) {
n, err := fw.w.Write(p)
if fw.f != nil {
fw.f.Flush()
}
return n, err
}
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