mugit/internal/handlers/git.go (view raw)
Oleksandr Smirnov
Oleksandr Smirnov
olexsmir@gmail.com support both repo and repo.git as names, 4 months ago
olexsmir@gmail.com support both repo and repo.git as names, 4 months ago
| 1 | package handlers |
| 2 | |
| 3 | import ( |
| 4 | "compress/gzip" |
| 5 | "io" |
| 6 | "log/slog" |
| 7 | "net/http" |
| 8 | |
| 9 | securejoin "github.com/cyphar/filepath-securejoin" |
| 10 | "olexsmir.xyz/mugit/internal/git/gitservice" |
| 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 | name := getNormalizedName(r.PathValue("name")) |
| 34 | _, err := h.openPublicRepo(name, "") |
| 35 | if err != nil { |
| 36 | h.write404(w, err) |
| 37 | return |
| 38 | } |
| 39 | |
| 40 | w.Header().Set("content-type", "application/x-git-upload-pack-advertisement") |
| 41 | w.WriteHeader(http.StatusOK) |
| 42 | |
| 43 | repoPath := repoNameToPath(name) |
| 44 | path, err := securejoin.SecureJoin(h.c.Repo.Dir, repoPath) |
| 45 | if err != nil { |
| 46 | w.WriteHeader(http.StatusBadRequest) |
| 47 | slog.Error("git: info/refs", "err", err) |
| 48 | return |
| 49 | } |
| 50 | |
| 51 | if err := gitservice.InfoRefs(path, w); err != nil { |
| 52 | w.WriteHeader(http.StatusInternalServerError) |
| 53 | slog.Error("git: info/refs", "err", err) |
| 54 | return |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | func (h *handlers) uploadPack(w http.ResponseWriter, r *http.Request) { |
| 59 | name := getNormalizedName(r.PathValue("name")) |
| 60 | _, err := h.openPublicRepo(name, "") |
| 61 | if err != nil { |
| 62 | h.write404(w, err) |
| 63 | return |
| 64 | } |
| 65 | |
| 66 | w.Header().Set("content-type", "application/x-git-upload-pack-result") |
| 67 | w.Header().Set("Connection", "Keep-Alive") |
| 68 | w.Header().Set("Transfer-Encoding", "chunked") |
| 69 | w.WriteHeader(http.StatusOK) |
| 70 | |
| 71 | reader := io.Reader(r.Body) |
| 72 | if r.Header.Get("Content-Encoding") == "gzip" { |
| 73 | gr, gerr := gzip.NewReader(r.Body) |
| 74 | if gerr != nil { |
| 75 | w.WriteHeader(http.StatusInternalServerError) |
| 76 | slog.Error("git: gzip reader", "err", gerr) |
| 77 | return |
| 78 | } |
| 79 | defer gr.Close() |
| 80 | reader = gr |
| 81 | } |
| 82 | |
| 83 | repoPath := repoNameToPath(name) |
| 84 | path, err := securejoin.SecureJoin(h.c.Repo.Dir, repoPath) |
| 85 | if err != nil { |
| 86 | w.WriteHeader(http.StatusBadRequest) |
| 87 | slog.Error("git: info/refs", "err", err) |
| 88 | return |
| 89 | } |
| 90 | |
| 91 | if err := gitservice.UploadPack(path, true, reader, newFlushWriter(w)); err != nil { |
| 92 | w.WriteHeader(http.StatusInternalServerError) |
| 93 | slog.Error("git: upload-pack", "err", err) |
| 94 | return |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | type flushWriter struct { |
| 99 | w io.Writer |
| 100 | f http.Flusher |
| 101 | } |
| 102 | |
| 103 | func newFlushWriter(w http.ResponseWriter) io.Writer { |
| 104 | f, _ := w.(http.Flusher) |
| 105 | return &flushWriter{w: w, f: f} |
| 106 | } |
| 107 | |
| 108 | func (fw *flushWriter) Write(p []byte) (int, error) { |
| 109 | n, err := fw.w.Write(p) |
| 110 | if fw.f != nil { |
| 111 | fw.f.Flush() |
| 112 | } |
| 113 | return n, err |
| 114 | } |