Expose MultistatusWriter

webdav.go

@@ -8,7 +8,6 @@ package webdav
 
 import (
 	"errors"
-	"fmt"
 	"io"
 	"net/http"
 	"net/url"
@@ -560,7 +559,7 @@ func (h *Handler) handlePropfind(w http.ResponseWriter, r *http.Request) (status
 		return status, err
 	}
 
-	mw := multistatusWriter{w: w}
+	mw := MultistatusWriter{w: w}
 
 	walkFn := func(reqPath string, info os.FileInfo, err error) error {
 		if err != nil {
@@ -585,11 +584,11 @@ func (h *Handler) handlePropfind(w http.ResponseWriter, r *http.Request) (status
 		if err != nil {
 			return err
 		}
-		return mw.write(makePropstatResponse(path.Join(h.Prefix, reqPath), pstats))
+		return mw.Write(makePropstatResponse(path.Join(h.Prefix, reqPath), pstats))
 	}
 
 	walkErr := walkFS(ctx, h.FileSystem, depth, reqPath, fi, walkFn)
-	closeErr := mw.close()
+	closeErr := mw.Close()
 	if walkErr != nil {
 		return http.StatusInternalServerError, walkErr
 	}
@@ -628,9 +627,9 @@ func (h *Handler) handleProppatch(w http.ResponseWriter, r *http.Request) (statu
 	if err != nil {
 		return http.StatusInternalServerError, err
 	}
-	mw := multistatusWriter{w: w}
-	writeErr := mw.write(makePropstatResponse(r.URL.Path, pstats))
-	closeErr := mw.close()
+	mw := MultistatusWriter{w: w}
+	writeErr := mw.Write(makePropstatResponse(r.URL.Path, pstats))
+	closeErr := mw.Close()
 	if writeErr != nil {
 		return http.StatusInternalServerError, writeErr
 	}
@@ -640,24 +639,11 @@ func (h *Handler) handleProppatch(w http.ResponseWriter, r *http.Request) (statu
 	return 0, nil
 }
 
-func makePropstatResponse(href string, pstats []Propstat) *response {
-	resp := response{
+func makePropstatResponse(href string, pstats []Propstat) *Response {
+	return &Response{
 		Href:     []string{(&url.URL{Path: href}).EscapedPath()},
-		Propstat: make([]propstat, 0, len(pstats)),
+		Propstat: pstats,
 	}
-	for _, p := range pstats {
-		var xmlErr *xmlError
-		if p.XMLError != "" {
-			xmlErr = &xmlError{InnerXML: []byte(p.XMLError)}
-		}
-		resp.Propstat = append(resp.Propstat, propstat{
-			Status:              fmt.Sprintf("HTTP/1.1 %d %s", p.Status, StatusText(p.Status)),
-			Prop:                p.Props,
-			ResponseDescription: p.ResponseDescription,
-			Error:               xmlErr,
-		})
-	}
-	return &resp
 }
 
 const (

xml.go

@@ -219,6 +219,15 @@ type propstat struct {
 	ResponseDescription string     `xml:"DAV: responsedescription,omitempty"`
 }
 
+// http://www.webdav.org/specs/rfc4918.html#ELEMENT_response
+type Response struct {
+	Href                []string
+	Propstat            []Propstat
+	Status              int
+	XMLError            string
+	ResponseDescription string
+}
+
 // http://www.webdav.org/specs/rfc4918.html#ELEMENT_response
 type response struct {
 	XMLName             xml.Name   `xml:"DAV: response"`
@@ -232,13 +241,7 @@ type response struct {
 // MultistatusWriter marshals one or more Responses into a XML
 // multistatus response.
 // See http://www.webdav.org/specs/rfc4918.html#ELEMENT_multistatus
-// TODO(rsto, mpl): As a workaround, the "D:" namespace prefix, defined as
-// "DAV:" on this element, is prepended on the nested response, as well as on all
-// its nested elements. All property names in the DAV: namespace are prefixed as
-// well. This is because some versions of Mini-Redirector (on windows 7) ignore
-// elements with a default namespace (no prefixed namespace). A less intrusive fix
-// should be possible after golang.org/cl/11074. See https://golang.org/issue/11177
-type multistatusWriter struct {
+type MultistatusWriter struct {
 	// ResponseDescription contains the optional responsedescription
 	// of the multistatus XML element. Only the latest content before
 	// close will be emitted. Empty response descriptions are not
@@ -257,7 +260,29 @@ type multistatusWriter struct {
 // first, valid response to be written, Write prepends the XML representation
 // of r with a multistatus tag. Callers must call close after the last response
 // has been written.
-func (w *multistatusWriter) write(r *response) error {
+func (w *MultistatusWriter) Write(r *Response) error {
+	rr := &response{
+		Href:     r.Href,
+		Propstat: make([]propstat, 0, len(r.Propstat)),
+	}
+
+	for _, p := range r.Propstat {
+		var xmlErr *xmlError
+		if p.XMLError != "" {
+			xmlErr = &xmlError{InnerXML: []byte(p.XMLError)}
+		}
+		rr.Propstat = append(rr.Propstat, propstat{
+			Status:              fmt.Sprintf("HTTP/1.1 %d %s", p.Status, StatusText(p.Status)),
+			Prop:                p.Props,
+			ResponseDescription: p.ResponseDescription,
+			Error:               xmlErr,
+		})
+	}
+
+	return w.write(rr)
+}
+
+func (w *MultistatusWriter) write(r *response) error {
 	switch len(r.Href) {
 	case 0:
 		return errInvalidResponse
@@ -280,7 +305,7 @@ func (w *multistatusWriter) write(r *response) error {
 // writeHeader writes a XML multistatus start element on w's underlying
 // http.ResponseWriter and returns the result of the write operation.
 // After the first write attempt, writeHeader becomes a no-op.
-func (w *multistatusWriter) writeHeader() error {
+func (w *MultistatusWriter) writeHeader() error {
 	if w.enc != nil {
 		return nil
 	}
@@ -307,7 +332,7 @@ func (w *multistatusWriter) writeHeader() error {
 // an error if the multistatus response could not be completed. If both the
 // return value and field enc of w are nil, then no multistatus response has
 // been written.
-func (w *multistatusWriter) close() error {
+func (w *MultistatusWriter) Close() error {
 	if w.enc == nil {
 		return nil
 	}

xml_test.go

@@ -564,7 +564,7 @@ func TestMultistatusWriter(t *testing.T) {
 loop:
 	for _, tc := range testCases {
 		rec := httptest.NewRecorder()
-		w := multistatusWriter{w: rec, responseDescription: tc.respdesc}
+		w := MultistatusWriter{w: rec, responseDescription: tc.respdesc}
 		if tc.writeHeader {
 			if err := w.writeHeader(); err != nil {
 				t.Errorf("%s: got writeHeader error %v, want nil", tc.desc, err)
@@ -580,7 +580,7 @@ loop:
 				continue loop
 			}
 		}
-		if err := w.close(); err != tc.wantErr {
+		if err := w.Close(); err != tc.wantErr {
 			t.Errorf("%s: got close error %v, want %v",
 				tc.desc, err, tc.wantErr)
 			continue