feature/artifact (#190)

* embed assets for web with separate dockerfile

* add artifact dockerfile

* add artifacts upload to github release

* fix statik params and add make for local builds

* fix docker image name to match compose

* fix typos

.drone.yml

@@ -42,6 +42,17 @@ pipeline:
     when:
       event: tag
 
+  artifacts_tag:
+    image: plugins/docker
+    dockerfile: Dockerfile.artifacts
+    build_args:
+      - DRONE=${DRONE}
+      - DRONE_TAG=${DRONE_TAG}
+      - DRONE_COMMIT=${DRONE_COMMIT}
+      - GITHUB_TOKEN=${GITHUB_TOKEN}
+    when:
+      event: tag
+
   docker_branch:
     image: plugins/docker
     repo: umputun/remark42

Dockerfile.artifacts

@@ -0,0 +1,87 @@
+FROM node:10.6-alpine as build-frontend-deps
+
+ARG CI
+ENV SKIP_FRONTEND_TEST=true
+
+RUN apk add --no-cache --update git
+ADD web/package.json /srv/web/package.json
+ADD web/package-lock.json /srv/web/package-lock.json
+RUN cd /srv/web && CI=true npm ci
+
+FROM node:10.6-alpine as build-frontend
+
+ARG CI
+ARG NODE_ENV=production
+ENV SKIP_FRONTEND_TEST=true
+
+COPY --from=build-frontend-deps /srv/web/node_modules /srv/web/node_modules
+ADD web /srv/web
+RUN cd /srv/web && \
+    npm run build && \
+    rm -rf ./node_modules
+
+
+FROM umputun/baseimage:buildgo-latest as build-backend
+
+ARG GITHUB_TOKEN
+ENV SKIP_BACKEND_TEST=true
+
+WORKDIR /go/src/github.com/umputun/remark/backend
+ADD backend /go/src/github.com/umputun/remark/backend
+ADD README.md /go/src/github.com/umputun/remark/
+ADD LICENSE /go/src/github.com/umputun/remark/
+
+COPY --from=build-frontend /srv/web web
+
+RUN \
+    go get -v github.com/rakyll/statik && \
+    statik --src=/go/src/github.com/umputun/remark/backend/web --dest=/go/src/github.com/umputun/remark/backend/app/rest -p api -f && \
+    ls -la /go/src/github.com/umputun/remark/backend/app/rest/api/statik.go
+
+# if DRONE presented use DRONE_* git env to make version
+RUN \
+    if [ -z "$DRONE" ] ; then \
+    echo "runs outside of drone" && version="local"; \
+    else version=${DRONE_TAG}${DRONE_BRANCH}${DRONE_PULL_REQUEST}-${DRONE_COMMIT:0:7}-$(date +%Y%m%d-%H:%M:%S); fi && \
+    echo "version=$version" && \
+    GOOS=linux GOARCH=amd64 go build -o remark42.linux-amd64 -ldflags "-X main.revision=${version} -s -w" ./app && \
+    GOOS=linux GOARCH=386 go build -o remark42.linux-386 -ldflags "-X main.revision=${version} -s -w" ./app && \
+    GOOS=linux GOARCH=arm64 go build -o remark42.linux-arm64 -ldflags "-X main.revision=${version} -s -w" ./app && \
+    GOOS=windows GOARCH=amd64 go build -o remark42.windows-amd64.exe -ldflags "-X main.revision=${version} -s -w" ./app && \
+    GOOS=darwin GOARCH=amd64 go build -o remark42.darwin-amd64 -ldflags "-X main.revision=${version} -s -w" ./app
+
+RUN \
+    if [ -z "$DRONE_TAG" ] ; then \
+    echo "runs outside of drone" && tag=""; \
+    else tag=_${DRONE_TAG}; fi && \
+    apk add --no-cache --update zip && \
+    tar cvzf remark42${tag}.linux-amd64.tar.gz remark42.linux-amd64 ../LICENSE ../README.md && \
+    tar cvzf remark42${tag}.linux-386.tar.gz remark42.linux-386 ../LICENSE ../README.md && \
+    tar cvzf remark42${tag}.linux-arm64.tar.gz remark42.linux-arm64 ../LICENSE ../README.md && \
+    tar cvzf remark42${tag}.darwin-amd64.tar.gz remark42.darwin-amd64 ../LICENSE ../README.md && \
+    zip remark${tag}.windows-amd64.zip remark42.windows-amd64.exe ../LICENSE ../README.md
+
+# upload to github
+RUN \
+    if [ -z "$DRONE_TAG" ] ; then \
+    echo "skip upload to github" ; \
+    else \
+    curl -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.manifold-preview" \
+    -H "Content-Type: application/gzip" --data-binary @remark42_${DRONE_TAG}.linux-amd64.tar.gz \
+    "https://uploads.github.com/repos/umputun/remark/releases/${DRONE_TAG}/assets?name=remark_${DRONE_TAG}.linux-amd64.tar.gz" && \
+    curl -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.manifold-preview" \
+    -H "Content-Type: application/gzip" --data-binary @remark42_${DRONE_TAG}.linux-386.tar.gz \
+    "https://uploads.github.com/repos/umputun/remark/releases/${DRONE_TAG}/assets?name=remark_${DRONE_TAG}.linux-386.tar.gz" && \
+    curl -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.manifold-preview" \
+    -H "Content-Type: application/gzip" --data-binary @remark42_${DRONE_TAG}.linux-arm64.tar.gz \
+    "https://uploads.github.com/repos/umputun/remark/releases/${DRONE_TAG}/assets?name=remark_${DRONE_TAG}.linux-arm64.tar.gz" && \
+    curl -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.manifold-preview" \
+    -H "Content-Type: application/gzip" --data-binary @remark42_${DRONE_TAG}.darwin-amd64.tar.gz \
+    "https://uploads.github.com/repos/umputun/remark/releases/${DRONE_TAG}/assets?name=remark_${DRONE_TAG}.darwin-amd64.tar.gz" && \
+    curl -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.manifold-preview" \
+    -H "Content-Type: application/zip" --data-binary @remark42_${DRONE_TAG}.windows-amd64.zip \
+    "https://uploads.github.com/repos/umputun/remark/releases/${DRONE_TAG}/assets?name=remark_${DRONE_TAG}.windows-amd64.zip"; fi
+
+FROM alpine
+COPY --from=build-backend /go/src/github.com/umputun/remark/backend/remark42.* /artifacts/
+CMD ["sleep", "100"]

Makefile

@@ -0,0 +1,11 @@
+OS=linux
+ARCH=amd64
+
+bin:
+	docker build -f Dockerfile.artifacts -t remark42.bin .
+	docker run -d --name=remark42.bin remark42.bin
+	docker cp remark42.bin:/artifacts/remark42.$(OS)-$(ARCH) remark42
+	docker rm -f remark42.bin
+
+docker:
+	docker build -t umputun/remark42 --build-arg SKIP_FRONTEND_TEST=true --build-arg SKIP_BACKEND_TEST=true .

backend/Gopkg.lock

@@ -237,6 +237,14 @@
   revision = "792786c7400a136282c1664665ae0a8db921c6c2"
   version = "v1.0.0"
 
+[[projects]]
+  digest = "1:bc91590d3e20673d5e33267fc140e7dadddde0b84f2e9030547ba86859d2d13e"
+  name = "github.com/rakyll/statik"
+  packages = ["fs"]
+  pruneopts = "UT"
+  revision = "19b88da8fc15428620782ba18f68423130e7ac7d"
+  version = "v0.1.3"
+
 [[projects]]
   branch = "master"
   digest = "1:def689e73e9252f6f7fe66834a76751a41b767e03daab299e607e7226c58a855"
@@ -367,6 +375,7 @@
     "github.com/nullrocks/identicon",
     "github.com/patrickmn/go-cache",
     "github.com/pkg/errors",
+    "github.com/rakyll/statik/fs",
     "github.com/stretchr/testify/assert",
     "github.com/stretchr/testify/require",
     "golang.org/x/image/draw",

backend/app/rest/api/rest.go

@@ -20,6 +20,7 @@ import (
 	"github.com/go-chi/cors"
 	"github.com/go-chi/render"
 	"github.com/pkg/errors"
+	"github.com/rakyll/statik/fs"
 
 	"github.com/umputun/remark/backend/app/migrator"
 	"github.com/umputun/remark/backend/app/rest"
@@ -213,11 +214,24 @@ func (s *Rest) routes() chi.Router {
 	return router
 }
 
-// serves static files from /web
+// serves static files from /web or embedded by statik
 func addFileServer(r chi.Router, path string, root http.FileSystem) {
-	log.Printf("[INFO] run file server for %s, path %s", root, path)
+
+	var webFS http.Handler
+
+	statikFS, err := fs.New()
+	if err == nil {
+		log.Printf("[INFO] run file server for %s, embedded", root)
+		webFS = http.FileServer(statikFS)
+	}
+	if err != nil {
+		log.Printf("[DEBUG] no embedded assets loaded, %s", err)
+		log.Printf("[INFO] run file server for %s, path %s", root, path)
+		webFS = http.FileServer(root)
+	}
+
 	origPath := path
-	fs := http.StripPrefix(path, http.FileServer(root))
+	webFS = http.StripPrefix(path, webFS)
 	if path != "/" && path[len(path)-1] != '/' {
 		r.Get(path, http.RedirectHandler(path+"/", 301).ServeHTTP)
 		path += "/"
@@ -231,7 +245,7 @@ func addFileServer(r chi.Router, path string, root http.FileSystem) {
 				http.NotFound(w, r)
 				return
 			}
-			fs.ServeHTTP(w, r)
+			webFS.ServeHTTP(w, r)
 		}))
 }
 

backend/app/rest/api/rest_private_test.go

@@ -24,10 +24,10 @@ func TestRest_Create(t *testing.T) {
 	resp, err := post(t, ts.URL+"/api/v1/comment",
 		`{"text": "test 123", "locator":{"url": "https://radio-t.com/blah1", "site": "radio-t"}}`)
 	assert.Nil(t, err)
-	require.Equal(t, http.StatusCreated, resp.StatusCode)
-
 	b, err := ioutil.ReadAll(resp.Body)
 	assert.Nil(t, err)
+	require.Equal(t, http.StatusCreated, resp.StatusCode, string(b))
+
 	c := JSON{}
 	err = json.Unmarshal(b, &c)
 	assert.Nil(t, err)
@@ -114,6 +114,7 @@ func TestRest_CreateRejected(t *testing.T) {
 	assert.Nil(t, err)
 	assert.Equal(t, 401, resp.StatusCode)
 }
+
 func TestRest_CreateAndGet(t *testing.T) {
 	srv, ts := prep(t)
 	assert.NotNil(t, srv)
@@ -121,7 +122,7 @@ func TestRest_CreateAndGet(t *testing.T) {
 
 	// create comment
 	resp, err := post(t, ts.URL+"/api/v1/comment",
-		`{"text": "**test** *123* http://radio-t.com", "locator":{"url": "https://radio-t.com/blah1", "site": "radio-t"}}`)
+		`{"text": "**test** *123*\n\n http://radio-t.com", "locator":{"url": "https://radio-t.com/blah1", "site": "radio-t"}}`)
 	require.Nil(t, err)
 	require.Equal(t, http.StatusCreated, resp.StatusCode)
 	b, err := ioutil.ReadAll(resp.Body)
@@ -138,8 +139,8 @@ func TestRest_CreateAndGet(t *testing.T) {
 	comment := store.Comment{}
 	err = json.Unmarshal([]byte(res), &comment)
 	assert.Nil(t, err)
-	assert.Equal(t, `<p><strong>test</strong> <em>123</em> <a href="http://radio-t.com" rel="nofollow">http://radio-t.com</a></p>`+"\n", comment.Text)
-	assert.Equal(t, "**test** *123* http://radio-t.com", comment.Orig)
+	assert.Equal(t, "<p><strong>test</strong> <em>123</em></p>\n\n<p><a href=\"http://radio-t.com\" rel=\"nofollow\">http://radio-t.com</a></p>\n", comment.Text)
+	assert.Equal(t, "**test** *123*\n\n http://radio-t.com", comment.Orig)
 	assert.Equal(t, store.User{Name: "developer one", ID: "dev",
 		Picture: "/api/v1/avatar/remark.image", Admin: true, Blocked: false, IP: "dbc7c999343f003f189f70aaf52cc04443f90790"},
 		comment.User)

backend/app/store/comment.go

@@ -94,7 +94,7 @@ func (c *Comment) SetDeleted(mode DeleteMode) {
 	}
 }
 
-// Sanitize clean dangerous html/js from the comment, shorten autolinks.
+// Sanitize clean dangerous html/js from the comment
 func (c *Comment) Sanitize() {
 	p := bluemonday.UGCPolicy()
 	p.AllowAttrs("class").Matching(regexp.MustCompile("^language-[a-zA-Z0-9]+$")).OnElements("code")

backend/app/store/formater_test.go

@@ -35,7 +35,7 @@ func TestFormatter_FormatTextNoConvertor(t *testing.T) {
 
 func TestFormatter_FormatComment(t *testing.T) {
 	comment := Comment{
-		Text:      `blah`,
+		Text:      "blah\n\nxyz",
 		User:      User{ID: "username"},
 		ParentID:  "p123",
 		ID:        "123",
@@ -49,7 +49,7 @@ func TestFormatter_FormatComment(t *testing.T) {
 
 	f := NewCommentFormatter(mockConverter{})
 	exp := comment
-	exp.Text = "<p>blah</p>\n!converted"
+	exp.Text = "<p>blah</p>\n\n<p>xyz</p>\n!converted"
 	assert.Equal(t, exp, f.Format(comment))
 }
 

backend/app/store/user.go

@@ -37,7 +37,7 @@ func HashValue(val string, secret string) string {
 	}
 	key := []byte(secret)
 	h := hmac.New(sha1.New, key)
-	return hashWithFailback(h, val)
+	return hashWithFallback(h, val)
 }
 
 // EncodeID hashes id to sha1. The function intentionally left outside of User struct because in some cases
@@ -47,11 +47,11 @@ func EncodeID(id string) string {
 		return id // already hashed or empty
 	}
 	h := sha1.New()
-	return hashWithFailback(h, id)
+	return hashWithFallback(h, id)
 }
 
-// hashWithFailback tries to has val with hash.Hash and failback to crc if needed
-func hashWithFailback(h hash.Hash, val string) string {
+// hashWithFallback tries to has val with hash.Hash and failback to crc if needed
+func hashWithFallback(h hash.Hash, val string) string {
 	if _, err := io.WriteString(h, val); err != nil {
 		// fail back to crc64
 		log.Printf("[WARN] can't hash id %s, %s", val, err)

backend/vendor/github.com/rakyll/statik/LICENSE

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
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+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
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+      Work and such Derivative Works in Source or Object form.
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+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
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+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
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+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
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+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
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+          that such additional attribution notices cannot be construed
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+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
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+      Work (including but not limited to damages for loss of goodwill,
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+      other commercial damages or losses), even if such Contributor
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+      on Your own behalf and on Your sole responsibility, not on behalf
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+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
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+
+   Copyright 2014 Google Inc.
+
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+   you may not use this file except in compliance with the License.
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+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

backend/vendor/github.com/rakyll/statik/fs/fs.go

@@ -0,0 +1,146 @@
+// Copyright 2014 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package fs contains an HTTP file system that works with zip contents.
+package fs
+
+import (
+	"archive/zip"
+	"bytes"
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"strings"
+)
+
+var zipData string
+
+// file holds unzipped read-only file contents and file metadata.
+type file struct {
+	os.FileInfo
+	data []byte
+}
+
+type statikFS struct {
+	files map[string]file
+}
+
+// Register registers zip contents data, later used to initialize
+// the statik file system.
+func Register(data string) {
+	zipData = data
+}
+
+// New creates a new file system with the registered zip contents data.
+// It unzips all files and stores them in an in-memory map.
+func New() (http.FileSystem, error) {
+	if zipData == "" {
+		return nil, errors.New("statik/fs: no zip data registered")
+	}
+	zipReader, err := zip.NewReader(strings.NewReader(zipData), int64(len(zipData)))
+	if err != nil {
+		return nil, err
+	}
+	files := make(map[string]file)
+	for _, zipFile := range zipReader.File {
+		unzipped, err := unzip(zipFile)
+		if err != nil {
+			return nil, fmt.Errorf("statik/fs: error unzipping file %q: %s", zipFile.Name, err)
+		}
+		files["/"+zipFile.Name] = file{
+			FileInfo: zipFile.FileInfo(),
+			data:     unzipped,
+		}
+	}
+	return &statikFS{files: files}, nil
+}
+
+func unzip(zf *zip.File) ([]byte, error) {
+	rc, err := zf.Open()
+	if err != nil {
+		return nil, err
+	}
+	defer rc.Close()
+	return ioutil.ReadAll(rc)
+}
+
+// Open returns a file matching the given file name, or os.ErrNotExists if
+// no file matching the given file name is found in the archive.
+// If a directory is requested, Open returns the file named "index.html"
+// in the requested directory, if that file exists.
+func (fs *statikFS) Open(name string) (http.File, error) {
+	name = strings.Replace(name, "//", "/", -1)
+	f, ok := fs.files[name]
+	if ok {
+		return newHTTPFile(f, false), nil
+	}
+	// The file doesn't match, but maybe it's a directory,
+	// thus we should look for index.html
+	indexName := strings.Replace(name+"/index.html", "//", "/", -1)
+	f, ok = fs.files[indexName]
+	if !ok {
+		return nil, os.ErrNotExist
+	}
+	return newHTTPFile(f, true), nil
+}
+
+func newHTTPFile(file file, isDir bool) *httpFile {
+	return &httpFile{
+		file:   file,
+		reader: bytes.NewReader(file.data),
+		isDir:  isDir,
+	}
+}
+
+// httpFile represents an HTTP file and acts as a bridge
+// between file and http.File.
+type httpFile struct {
+	file
+
+	reader *bytes.Reader
+	isDir  bool
+}
+
+// Read reads bytes into p, returns the number of read bytes.
+func (f *httpFile) Read(p []byte) (n int, err error) {
+	return f.reader.Read(p)
+}
+
+// Seek seeks to the offset.
+func (f *httpFile) Seek(offset int64, whence int) (ret int64, err error) {
+	return f.reader.Seek(offset, whence)
+}
+
+// Stat stats the file.
+func (f *httpFile) Stat() (os.FileInfo, error) {
+	return f, nil
+}
+
+// IsDir returns true if the file location represents a directory.
+func (f *httpFile) IsDir() bool {
+	return f.isDir
+}
+
+// Readdir returns an empty slice of files, directory
+// listing is disabled.
+func (f *httpFile) Readdir(count int) ([]os.FileInfo, error) {
+	// directory listing is disabled.
+	return make([]os.FileInfo, 0), nil
+}
+
+func (f *httpFile) Close() error {
+	return nil
+}