mugit/internal/handlers/git.go(view raw)
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package handlers
import (
"compress/gzip"
"io"
"log/slog"
"net/http"
securejoin "github.com/cyphar/filepath-securejoin"
"olexsmir.xyz/mugit/internal/git/gitservice"
)
// 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" {
h.repoIndex(w, r)
}
}
func (h *handlers) infoRefs(w http.ResponseWriter, r *http.Request) {
name := r.PathValue("name")
_, err := h.openPublicRepo(name, "")
if err != nil {
h.write404(w, err)
return
}
w.Header().Set("content-type", "application/x-git-upload-pack-advertisement")
w.WriteHeader(http.StatusOK)
path, err := securejoin.SecureJoin(h.c.Repo.Dir, name)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
slog.Error("git: info/refs", "err", err)
return
}
if err := gitservice.InfoRefs(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) {
name := r.PathValue("name")
_, err := h.openPublicRepo(name, "")
if err != nil {
h.write404(w, err)
return
}
w.Header().Set("content-type", "application/x-git-upload-pack-result")
w.Header().Set("Connection", "Keep-Alive")
w.Header().Set("Transfer-Encoding", "chunked")
w.WriteHeader(http.StatusOK)
reader := io.Reader(r.Body)
if r.Header.Get("Content-Encoding") == "gzip" {
gr, gerr := gzip.NewReader(r.Body)
if gerr != nil {
w.WriteHeader(http.StatusInternalServerError)
slog.Error("git: gzip reader", "err", gerr)
return
}
defer gr.Close()
reader = gr
}
path, err := securejoin.SecureJoin(h.c.Repo.Dir, name)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
slog.Error("git: info/refs", "err", err)
return
}
if err := gitservice.UploadPack(path, true, reader, newFlushWriter(w)); err != nil {
w.WriteHeader(http.StatusInternalServerError)
slog.Error("git: upload-pack", "err", err)
return
}
}
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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