mugit/internal/handlers/git.go (view raw)
| 1 | package handlers |
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | "io" |
| 6 | "log/slog" |
| 7 | "net/http" |
| 8 | |
| 9 | "olexsmir.xyz/mugit/internal/git" |
| 10 | "olexsmir.xyz/mugit/internal/git/gitx" |
| 11 | ) |
| 12 | |
| 13 | // multiplex, check if the request smells like gitprotocol-http(5), if so, it |
| 14 | // passes it to git smart http, otherwise renders templates |
| 15 | func (h *handlers) multiplex(w http.ResponseWriter, r *http.Request) { |
| 16 | if r.URL.RawQuery == "service=git-receive-pack" { |
| 17 | w.WriteHeader(http.StatusBadRequest) |
| 18 | w.Write([]byte("http pushing is not supported")) |
| 19 | return |
| 20 | } |
| 21 | |
| 22 | path := r.PathValue("rest") |
| 23 | if path == "info/refs" && r.Method == "GET" && r.URL.RawQuery == "service=git-upload-pack" { |
| 24 | h.infoRefs(w, r) |
| 25 | } else if path == "git-upload-pack" && r.Method == "POST" { |
| 26 | h.uploadPack(w, r) |
| 27 | } else if r.Method == "GET" { |
| 28 | h.repoIndex(w, r) |
| 29 | } |
| 30 | } |
| 31 | |
| 32 | func (h *handlers) infoRefs(w http.ResponseWriter, r *http.Request) { |
| 33 | path, err := h.checkRepoPublicityAndGetPath(r.PathValue("name")) |
| 34 | if err != nil { |
| 35 | h.write404(w, err) |
| 36 | return |
| 37 | } |
| 38 | |
| 39 | w.Header().Set("content-type", "application/x-git-upload-pack-advertisement") |
| 40 | w.WriteHeader(http.StatusOK) |
| 41 | if err := gitx.InfoRefs(r.Context(), path, w); err != nil { |
| 42 | w.WriteHeader(http.StatusInternalServerError) |
| 43 | slog.Error("git: info/refs", "err", err) |
| 44 | return |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | func (h *handlers) uploadPack(w http.ResponseWriter, r *http.Request) { |
| 49 | path, err := h.checkRepoPublicityAndGetPath(r.PathValue("name")) |
| 50 | if err != nil { |
| 51 | h.write404(w, err) |
| 52 | return |
| 53 | } |
| 54 | |
| 55 | w.Header().Set("Content-Type", "application/x-git-upload-pack-result") |
| 56 | w.Header().Set("Cache-Control", "no-cache") |
| 57 | w.WriteHeader(http.StatusOK) |
| 58 | |
| 59 | if err := gitx.UploadPack(r.Context(), path, true, r.Body, newFlushWriter(w)); err != nil { |
| 60 | slog.Error("git: upload-pack", "err", err) |
| 61 | return |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | func (h *handlers) archiveHandler(w http.ResponseWriter, r *http.Request) { |
| 66 | ref := r.PathValue("ref") |
| 67 | name := r.PathValue("name") |
| 68 | path, err := h.checkRepoPublicityAndGetPath(name) |
| 69 | if err != nil { |
| 70 | h.write404(w, err) |
| 71 | return |
| 72 | } |
| 73 | |
| 74 | filename := fmt.Sprintf("%s-%s.tar.gz", name, ref) |
| 75 | w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=%q", filename)) |
| 76 | w.Header().Set("Content-Type", "application/gzip") |
| 77 | w.WriteHeader(http.StatusOK) |
| 78 | |
| 79 | if err := gitx.ArchiveTar(r.Context(), path, ref, w); err != nil { |
| 80 | slog.Error("git: archive", "ref", ref, "err", err) |
| 81 | return |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | func (h *handlers) checkRepoPublicityAndGetPath(name string) (string, error) { |
| 86 | name = git.ResolveName(name) |
| 87 | path, err := git.ResolvePath(h.c.Repo.Dir, name) |
| 88 | if err != nil { |
| 89 | return "", err |
| 90 | } |
| 91 | |
| 92 | if _, err := git.OpenPublic(path, ""); err != nil { |
| 93 | return "", err |
| 94 | } |
| 95 | |
| 96 | return path, err |
| 97 | } |
| 98 | |
| 99 | func (h *handlers) openPublicRepo(name, ref string) (*git.Repo, error) { |
| 100 | name = git.ResolveName(name) |
| 101 | path, err := git.ResolvePath(h.c.Repo.Dir, name) |
| 102 | if err != nil { |
| 103 | return nil, err |
| 104 | } |
| 105 | return git.OpenPublic(path, ref) |
| 106 | } |
| 107 | |
| 108 | type flushWriter struct { |
| 109 | w io.Writer |
| 110 | f http.Flusher |
| 111 | } |
| 112 | |
| 113 | func newFlushWriter(w http.ResponseWriter) io.Writer { |
| 114 | f, _ := w.(http.Flusher) |
| 115 | return &flushWriter{w: w, f: f} |
| 116 | } |
| 117 | |
| 118 | func (fw *flushWriter) Write(p []byte) (int, error) { |
| 119 | n, err := fw.w.Write(p) |
| 120 | if fw.f != nil { |
| 121 | fw.f.Flush() |
| 122 | } |
| 123 | return n, err |
| 124 | } |