initial bits for gavin - a no bs webdav server

.gitignore

@@ -0,0 +1 @@
+gavin

go.mod

@@ -0,0 +1,8 @@
+module github.com/qbit/gavin
+
+go 1.13
+
+require (
+	golang.org/x/net v0.0.0-20191105084925-a882066a44e0
+	golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a
+)

go.sum

@@ -0,0 +1,6 @@
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/net v0.0.0-20191105084925-a882066a44e0 h1:QPlSTtPE2k6PZPasQUbzuK3p9JbS+vMXYVto8g/yrsg=
+golang.org/x/net v0.0.0-20191105084925-a882066a44e0/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a h1:1BGLXjeY4akVXGgbC9HugT3Jv3hCI0z56oJR5vAMgBU=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=

main.go

@@ -0,0 +1,67 @@
+package main
+
+import (
+	"flag"
+	"log"
+	"net"
+	"net/http"
+	"os"
+	"path/filepath"
+
+	"golang.org/x/net/webdav"
+	"golang.org/x/sys/unix"
+)
+
+var listen string
+var davDir string
+var staticDir string
+
+func init() {
+	dir, err := filepath.Abs(filepath.Dir(os.Args[0]))
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	flag.StringVar(&listen, "http", ":8080", "Listen on")
+	flag.StringVar(&davDir, "dir", dir, "WebDAV directory to serve.")
+	flag.StringVar(&staticDir, "static", dir, "Directory to serve static resources from.")
+	flag.Parse()
+
+	unix.Unveil(staticDir, "r")
+	unix.Unveil(davDir, "rwc")
+	err = unix.UnveilBlock()
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
+func main() {
+	wdav := &webdav.Handler{
+		Prefix:     "/dav/",
+		LockSystem: webdav.NewMemLS(),
+		FileSystem: webdav.Dir(davDir),
+		Logger: func(r *http.Request, err error) {
+			log.Printf("%s : %s - %s", r.Method, r.URL.Path, err)
+		},
+	}
+
+	mux := http.NewServeMux()
+	mux.Handle("/", http.FileServer(http.Dir(staticDir)))
+	mux.HandleFunc("/dav/", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		u, p, ok := r.BasicAuth()
+		if !(ok == true && u == "qbit" && p == "hai") {
+			w.Header().Set("WWW-Authenticate", `Basic realm="davfs"`)
+			http.Error(w, "Unauthorized", http.StatusUnauthorized)
+			return
+		}
+		wdav.ServeHTTP(w, r)
+	}))
+
+	lis, err := net.Listen("tcp", listen)
+	if err != nil {
+		log.Panic(err)
+	}
+
+	s := http.Server{Handler: mux}
+	log.Panic(s.Serve(lis))
+}