webdav: add support for PUT to server

carddav/server.go

@@ -260,3 +260,7 @@ func (b *backend) propfindAddressObject(propfind *internal.Propfind, ao *Address
 
 	return internal.NewPropfindResponse(ao.Href, propfind, props)
 }
+
+func (b *backend) Put(r *http.Request) error {
+	panic("TODO")
+}

fs_local.go

@@ -1,6 +1,7 @@
 package webdav
 
 import (
+	"io"
 	"net/http"
 	"os"
 	"path"
@@ -52,4 +53,12 @@ func (fs LocalFileSystem) Readdir(name string) ([]os.FileInfo, error) {
 	return f.Readdir(-1)
 }
 
+func (fs LocalFileSystem) Create(name string) (io.WriteCloser, error) {
+	p, err := fs.path(name)
+	if err != nil {
+		return nil, err
+	}
+	return os.Create(p)
+}
+
 var _ FileSystem = LocalFileSystem("")

internal/server.go

@@ -76,6 +76,7 @@ func ServeMultistatus(w http.ResponseWriter, ms *Multistatus) error {
 type Backend interface {
 	Options(r *http.Request) ([]string, error)
 	HeadGet(w http.ResponseWriter, r *http.Request) error
+	Put(r *http.Request) error
 	Propfind(r *http.Request, pf *Propfind, depth Depth) (*Multistatus, error)
 }
 
@@ -93,6 +94,14 @@ func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 			err = h.handleOptions(w, r)
 		case http.MethodGet, http.MethodHead:
 			err = h.Backend.HeadGet(w, r)
+		case http.MethodPut:
+			err = h.Backend.Put(r)
+			if err == nil {
+				// TODO: Last-Modified, ETag, Content-Type if the request has
+				// been copied verbatim
+				// TODO: Location if the server has mutated the href
+				w.WriteHeader(http.StatusCreated)
+			}
 		case "PROPFIND":
 			err = h.handlePropfind(w, r)
 		default:

server.go

@@ -23,6 +23,7 @@ type FileSystem interface {
 	Open(name string) (File, error)
 	Stat(name string) (os.FileInfo, error)
 	Readdir(name string) ([]os.FileInfo, error)
+	Create(name string) (io.WriteCloser, error)
 }
 
 // Handler handles WebDAV HTTP requests. It can be used to create a WebDAV
@@ -83,6 +84,20 @@ func (b *backend) HeadGet(w http.ResponseWriter, r *http.Request) error {
 	return nil
 }
 
+func (b *backend) Put(r *http.Request) error {
+	wc, err := b.FileSystem.Create(r.URL.Path)
+	if err != nil {
+		return err
+	}
+	defer wc.Close()
+
+	if _, err := io.Copy(wc, r.Body); err != nil {
+		return err
+	}
+
+	return wc.Close()
+}
+
 func (b *backend) Propfind(r *http.Request, propfind *internal.Propfind, depth internal.Depth) (*internal.Multistatus, error) {
 	fi, err := b.FileSystem.Stat(r.URL.Path)
 	if os.IsNotExist(err) {