docs: add disclaimer

* feat: introduce structured, field logging

The logging is currently minimal and only for initial message of listening and user login attempts

* chore: major version upgarde

there was a breaking API change in 8cd6d0a585 for which the git tag was v4.0.0 but the Go SIV was missed. This commit updates the SIV and retracts the defective version of v4.1.0.

.github/workflows/ci.yml

@@ -0,0 +1,88 @@
+# Used as inspiration: https://github.com/mvdan/github-actions-golang
+
+name: Tests
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  test:
+    strategy:
+      # Default is true, cancels jobs for other platforms in the matrix if one fails
+      fail-fast: false
+      matrix:
+        os: [ ubuntu-latest, macos-latest, windows-latest ]
+        go: [ '1.16' ]
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - name: Install Go
+      uses: actions/setup-go@v2
+      with:
+        go-version: ${{ matrix.go }}
+
+    - name: Checkout code
+      uses: actions/checkout@v2
+
+    - name: Print Go version and environment
+      id: vars
+      run: |
+        printf "Using go at: $(which go)\n"
+        printf "Go version: $(go version)\n"
+        printf "\n\nGo environment:\n\n"
+        go env
+        printf "\n\nSystem environment:\n\n"
+        env
+        echo "::set-output name=go_cache::$(go env GOCACHE)"
+
+    - name: Cache the build cache
+      uses: actions/cache@v2
+      with:
+        path: ${{ steps.vars.outputs.go_cache }}
+        key: ${{ runner.os }}-${{ matrix.go }}-go-ci-${{ hashFiles('**/go.sum') }}
+        restore-keys: |
+          ${{ runner.os }}-${{ matrix.go }}-go-ci
+
+    - name: Get dependencies
+      run: go get -v -t -d ./...
+
+    # To ensure the project compiles, and not just its tests are passing
+    - name: Build webdav
+      working-directory: .
+      env:
+        CGO_ENABLED: 0
+      run: go build -trimpath -ldflags="-w -s" -v
+
+    - name: Run tests
+      run: go test -v -race ./...
+
+  golangci-lint:
+    name: runner / golangci-lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code into the Go module directory
+        uses: actions/checkout@v2
+
+      - name: Run golangci-lint
+        uses: reviewdog/action-golangci-lint@v1
+        with:
+          github_token: ${{ secrets.github_token }}
+
+  goreleaser-check:
+  # goreleaser --rm-dist --skip-validate --skip-publish
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+      - uses: goreleaser/goreleaser-action@v2
+        with:
+          version: latest
+          args: check
+        env:
+          TAG: ${{ steps.vars.outputs.version_tag }}

.github/workflows/release.yml

@@ -0,0 +1,83 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*.*.*'
+
+jobs:
+  release:
+    name: Release
+    strategy:
+      matrix:
+        os: [ ubuntu-latest ]
+        go: [ '1.17' ]
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - name: Install Go
+      uses: actions/setup-go@v2
+      with:
+        go-version: ${{ matrix.go }}
+
+    - name: Checkout code
+      uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+
+    - name: Set up QEMU
+      uses: docker/setup-qemu-action@v1
+
+    - name: Set up Docker Buildx
+      id: buildx
+      uses: docker/setup-buildx-action@v1
+
+    # https://github.community/t5/GitHub-Actions/How-to-get-just-the-tag-name/m-p/32167/highlight/true#M1027
+    - name: Print Go version and environment
+      id: vars
+      run: |
+        printf "Using go at: $(which go)\n"
+        printf "Go version: $(go version)\n"
+        printf "\n\nGo environment:\n\n"
+        go env
+        printf "\n\nSystem environment:\n\n"
+        env
+        echo "::set-output name=short_sha::$(git rev-parse --short HEAD)"
+        echo "::set-output name=go_cache::$(go env GOCACHE)"
+
+        # Parse semver
+        TAG=${GITHUB_REF/refs\/tags\//}
+        SEMVER_RE='[^0-9]*\([0-9]*\)[.]\([0-9]*\)[.]\([0-9]*\)\([0-9A-Za-z\.-]*\)'
+        TAG_MAJOR=`echo ${TAG#v} | sed -e "s#$SEMVER_RE#\1#"`
+        TAG_MINOR=`echo ${TAG#v} | sed -e "s#$SEMVER_RE#\2#"`
+        TAG_PATCH=`echo ${TAG#v} | sed -e "s#$SEMVER_RE#\3#"`
+        TAG_SPECIAL=`echo ${TAG#v} | sed -e "s#$SEMVER_RE#\4#"`
+        echo "::set-output name=tag_major::${TAG_MAJOR}"
+        echo "::set-output name=tag_minor::${TAG_MINOR}"
+        echo "::set-output name=tag_patch::${TAG_PATCH}"
+        echo "::set-output name=tag_special::${TAG_SPECIAL}"
+
+    - name: Cache the build cache
+      uses: actions/cache@v2
+      with:
+        path: ${{ steps.vars.outputs.go_cache }}
+        key: ${{ runner.os }}-go${{ matrix.go }}-release-${{ hashFiles('**/go.sum') }}
+        restore-keys: |
+          ${{ runner.os }}-go${{ matrix.go }}-release
+
+    - name: Docker Login
+      if: success() && startsWith(github.ref, 'refs/tags/v')
+      env:
+        DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
+        DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
+      run: |
+        echo "${DOCKER_PASSWORD}" | docker login --username "${DOCKER_USERNAME}" --password-stdin
+
+    # GoReleaser will take care of publishing those artifacts into the release
+    - name: Run GoReleaser
+      uses: goreleaser/goreleaser-action@v2
+      with:
+        version: latest
+        args: release --rm-dist
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.gitignore

@@ -1,3 +1,2 @@
-config.yaml
-config.yml
-config.json
+dist/
+webdav

.goreleaser.yml

@@ -1,6 +1,18 @@
+env:
+  - GO111MODULE=on
+  - CGO_ENABLED=0
+
+before:
+  hooks:
+    - go mod download
+
 build:
-  main: cmd/webdav/main.go
+  main: main.go
   binary: webdav
+  flags:
+    - -trimpath
+  ldflags:
+    - -s -w -X github.com/hacdias/webdav/cmd.version={{.Version}}
   goos:
     - darwin
     - linux
@@ -13,6 +25,14 @@ build:
     - 386
     - arm
     - arm64
+    - mips
+    - mipsle
+    - mips64
+    - mips64le
+  goarm:
+    - 5
+    - 6
+    - 7
   ignore:
     - goos: openbsd
       goarch: arm
@@ -21,9 +41,71 @@ build:
       goarch: arm
       goarm: 6
 
-archive:
-  name_template: "{{.Os}}-{{.Arch}}-{{ .ProjectName }}"
-  format: tar.gz
-  format_overrides:
-    - goos: windows
-      format: zip
+archives:
+  - name_template: "{{.Os}}-{{.Arch}}{{if .Arm}}v{{.Arm}}{{end}}-{{ .ProjectName }}"
+    format: tar.gz
+    format_overrides:
+      - goos: windows
+        format: zip
+
+release:
+  github:
+    owner: hacdias
+    name: webdav
+  draft: false
+  prerelease: auto
+
+dockers:
+  - goos: linux
+    goarch: amd64
+    goarm: ""
+    use: buildx
+    image_templates:
+      - "hacdias/webdav:amd64-latest"
+      - "hacdias/webdav:amd64-{{ .Tag }}"
+      - "hacdias/webdav:amd64-v{{ .Major }}.{{ .Minor }}"
+      - "hacdias/webdav:amd64-v{{ .Major }}"
+  - goos: linux
+    goarch: arm
+    goarm: 7
+    use: buildx
+    build_flag_templates:
+      - "--platform=linux/arm/v7"
+    image_templates:
+      - "hacdias/webdav:armv7-latest"
+      - "hacdias/webdav:armv7-{{ .Tag }}"
+      - "hacdias/webdav:armv7-v{{ .Major }}.{{ .Minor }}"
+      - "hacdias/webdav:armv7-v{{ .Major }}"
+  - goos: linux
+    goarch: arm64
+    goarm: ""
+    use: buildx
+    build_flag_templates:
+      - "--platform=linux/arm64"
+    image_templates:
+      - "hacdias/webdav:arm64-latest"
+      - "hacdias/webdav:arm64-{{ .Tag }}"
+      - "hacdias/webdav:arm64-v{{ .Major }}.{{ .Minor }}"
+      - "hacdias/webdav:arm64-v{{ .Major }}"
+
+docker_manifests:
+  - name_template: hacdias/webdav:latest
+    image_templates:
+      - hacdias/webdav:amd64-latest
+      - hacdias/webdav:armv7-latest
+      - hacdias/webdav:arm64-latest
+  - name_template: hacdias/webdav:{{ .Tag }}
+    image_templates:
+      - hacdias/webdav:amd64-{{ .Tag }}
+      - hacdias/webdav:armv7-{{ .Tag }}
+      - hacdias/webdav:arm64-{{ .Tag }}
+  - name_template: hacdias/webdav:v{{ .Major }}.{{ .Minor }}
+    image_templates:
+      - hacdias/webdav:amd64-v{{ .Major }}.{{ .Minor }}
+      - hacdias/webdav:armv7-v{{ .Major }}.{{ .Minor }}
+      - hacdias/webdav:arm64-v{{ .Major }}.{{ .Minor }}
+  - name_template: hacdias/webdav:v{{ .Major }}
+    image_templates:
+      - hacdias/webdav:amd64-v{{ .Major }}
+      - hacdias/webdav:armv7-v{{ .Major }}
+      - hacdias/webdav:arm64-v{{ .Major }}

.travis.yml

@@ -1,19 +0,0 @@
-language: go
-
-go: 1.10.x
-
-env:
-  - "PATH=/home/travis/gopath/bin:$PATH"
-
-install:
-  - go get ./...
-  # Install gometalinter and certain linters
-  - go get github.com/alecthomas/gometalinter
-  - gometalinter --install
-
-script:
-  - gometalinter --disable-all -E vet -E gofmt -E misspell -E ineffassign -E goimports -E deadcode --tests ./...
-  - go test ./... -timeout 30s
-
-after_success:
-  - test -n "$TRAVIS_TAG" && curl -sL https://git.io/goreleaser | bash

Dockerfile

@@ -0,0 +1,10 @@
+FROM alpine:latest as certs
+RUN apk --update add ca-certificates
+
+FROM scratch
+COPY --from=certs /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
+
+EXPOSE 80
+COPY webdav /webdav
+
+ENTRYPOINT [ "/webdav" ]

README.md

@@ -0,0 +1,95 @@
+> ⚠️ Disclaimer: this repository is not actively maintained. If you are interested in maintaining it, please [contact me](https://github.com/hacdias/webdav/issues/144).
+
+# webdav
+
+![Build](https://github.com/hacdias/webdav/workflows/Tests/badge.svg)
+[![Go Report Card](https://goreportcard.com/badge/github.com/hacdias/webdav?style=flat-square)](https://goreportcard.com/report/hacdias/webdav)
+[![Version](https://img.shields.io/github/release/hacdias/webdav.svg?style=flat-square)](https://github.com/hacdias/webdav/releases/latest)
+[![Docker Pulls](https://img.shields.io/docker/pulls/hacdias/webdav)](https://hub.docker.com/r/hacdias/webdav)
+
+## Install
+
+Please refer to the [Releases page](https://github.com/hacdias/webdav/releases) for more information. There, you can either download the binaries or find the Docker commands to install WebDAV.
+
+## Usage
+
+```webdav``` command line interface is really easy to use so you can easily create a WebDAV server for your own user. By default, it runs on a random free port and supports JSON, YAML and TOML configuration. An example of a YAML configuration with the default configurations:
+
+```yaml
+# Server related settings
+address: 0.0.0.0
+port: 0
+auth: true
+tls: false
+cert: cert.pem
+key: key.pem
+prefix: /
+debug: false
+
+# Default user settings (will be merged)
+scope: .
+modify: true
+rules: []
+
+# CORS configuration
+cors:
+  enabled: true
+  credentials: true
+  allowed_headers:
+    - Depth
+  allowed_hosts:
+    - http://localhost:8080
+  allowed_methods:
+    - GET
+  exposed_headers:
+    - Content-Length
+    - Content-Range
+
+users:
+  - username: admin
+    password: admin
+    scope: /a/different/path
+  - username: encrypted
+    password: "{bcrypt}$2y$10$zEP6oofmXFeHaeMfBNLnP.DO8m.H.Mwhd24/TOX2MWLxAExXi4qgi"
+  - username: "{env}ENV_USERNAME"
+    password: "{env}ENV_PASSWORD"
+  - username: basic
+    password: basic
+    modify:   false
+    rules:
+      - regex: false
+        allow: false
+        path: /some/file
+      - path: /public/access/
+        modify: true
+```
+
+There are more ways to customize how you run WebDAV through flags and environment variables. Please run `webdav --help` for more information on that.
+
+### Systemd
+
+An example of how to use this with `systemd` is on [webdav.service.example](/webdav.service.example).
+
+### CORS
+
+The `allowed_*` properties are optional, the default value for each of them will be `*`. `exposed_headers` is optional as well, but is not set if not defined. Setting `credentials` to `true` will allow you to:
+
+1. Use `withCredentials = true` in javascript.
+2. Use the `username:password@host` syntax.
+
+### Reverse Proxy Service
+When you use a reverse proxy implementation like `Nginx` or `Apache`, please note the following fields to avoid causing `502` errors
+```text
+location / {
+        proxy_pass http://127.0.0.1:8080;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header REMOTE-HOST $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header Host $http_host;
+        proxy_redirect off;
+    }
+```
+
+## License
+
+MIT © [Henrique Dias](https://hacdias.com)

SECURITY.md

@@ -0,0 +1,8 @@
+# Security Policy
+
+## Reporting a Vulnerability
+
+Please report security issues to:
+msaa1990 [at] gmail [dot com]
+
+cc: hacdias [at] gmail [dot com]

cmd/cmd.go

@@ -0,0 +1,12 @@
+package cmd
+
+import (
+	"log"
+)
+
+// Execute executes the commands.
+func Execute() {
+	if err := rootCmd.Execute(); err != nil {
+		log.Fatal(err)
+	}
+}

cmd/config.go

@@ -0,0 +1,224 @@
+package cmd
+
+import (
+	"errors"
+	"log"
+	"os"
+	"regexp"
+	"strconv"
+	"strings"
+
+	"github.com/hacdias/webdav/v4/lib"
+	"github.com/spf13/pflag"
+	v "github.com/spf13/viper"
+	"golang.org/x/net/webdav"
+)
+
+func parseRules(raw []interface{}, defaultModify bool) []*lib.Rule {
+	rules := []*lib.Rule{}
+
+	for _, v := range raw {
+		if r, ok := v.(map[interface{}]interface{}); ok {
+			rule := &lib.Rule{
+				Regex:  false,
+				Allow:  false,
+				Modify: defaultModify,
+				Path:   "",
+			}
+
+			if regex, ok := r["regex"].(bool); ok {
+				rule.Regex = regex
+			}
+
+			if allow, ok := r["allow"].(bool); ok {
+				rule.Allow = allow
+			}
+
+			if modify, ok := r["modify"].(bool); ok {
+				rule.Modify = modify
+				if modify {
+					rule.Allow = true
+				}
+			}
+
+			path, ok := r["path"].(string)
+			if !ok {
+				continue
+			}
+
+			if rule.Regex {
+				rule.Regexp = regexp.MustCompile(path)
+			} else {
+				rule.Path = path
+			}
+
+			rules = append(rules, rule)
+		}
+	}
+
+	return rules
+}
+
+func loadFromEnv(v string) (string, error) {
+	v = strings.TrimPrefix(v, "{env}")
+	if v == "" {
+		return "", errors.New("no environment variable specified")
+	}
+
+	v = os.Getenv(v)
+	if v == "" {
+		return "", errors.New("the environment variable is empty")
+	}
+
+	return v, nil
+}
+
+func parseUsers(raw []interface{}, c *lib.Config) {
+	var err error
+	for _, v := range raw {
+		if u, ok := v.(map[interface{}]interface{}); ok {
+			username, ok := u["username"].(string)
+			if !ok {
+				log.Fatal("user needs an username")
+			}
+
+			if strings.HasPrefix(username, "{env}") {
+				username, err = loadFromEnv(username)
+				checkErr(err)
+			}
+
+			password, ok := u["password"].(string)
+			if !ok {
+				password = ""
+
+				if numPwd, ok := u["password"].(int); ok {
+					password = strconv.Itoa(numPwd)
+				}
+			}
+
+			if strings.HasPrefix(password, "{env}") {
+				password, err = loadFromEnv(password)
+				checkErr(err)
+			}
+
+			user := &lib.User{
+				Username: username,
+				Password: password,
+				Scope:    c.User.Scope,
+				Modify:   c.User.Modify,
+				Rules:    c.User.Rules,
+			}
+
+			if scope, ok := u["scope"].(string); ok {
+				user.Scope = scope
+			}
+
+			if modify, ok := u["modify"].(bool); ok {
+				user.Modify = modify
+			}
+
+			if rules, ok := u["rules"].([]interface{}); ok {
+				user.Rules = append(c.User.Rules, parseRules(rules, user.Modify)...)
+			}
+
+			user.Handler = &webdav.Handler{
+				Prefix: c.User.Handler.Prefix,
+				FileSystem: lib.WebDavDir{
+					Dir:     webdav.Dir(user.Scope),
+					NoSniff: c.NoSniff,
+				},
+				LockSystem: webdav.NewMemLS(),
+			}
+
+			c.Users[username] = user
+		}
+	}
+}
+
+func parseCors(cfg map[string]interface{}, c *lib.Config) {
+	cors := lib.CorsCfg{
+		Enabled:     cfg["enabled"].(bool),
+		Credentials: cfg["credentials"].(bool),
+	}
+
+	cors.AllowedHeaders = corsProperty("allowed_headers", cfg)
+	cors.AllowedHosts = corsProperty("allowed_hosts", cfg)
+	cors.AllowedMethods = corsProperty("allowed_methods", cfg)
+	cors.ExposedHeaders = corsProperty("exposed_headers", cfg)
+
+	c.Cors = cors
+}
+
+func corsProperty(property string, cfg map[string]interface{}) []string {
+	var def []string
+
+	if property == "exposed_headers" {
+		def = []string{}
+	} else {
+		def = []string{"*"}
+	}
+
+	if allowed, ok := cfg[property].([]interface{}); ok {
+		items := make([]string, len(allowed))
+
+		for idx, a := range allowed {
+			items[idx] = a.(string)
+		}
+
+		if len(items) == 0 {
+			return def
+		}
+
+		return items
+	}
+
+	return def
+}
+
+func readConfig(flags *pflag.FlagSet) *lib.Config {
+	cfg := &lib.Config{
+		User: &lib.User{
+			Scope:  getOpt(flags, "scope"),
+			Modify: getOptB(flags, "modify"),
+			Rules:  []*lib.Rule{},
+			Handler: &webdav.Handler{
+				Prefix: getOpt(flags, "prefix"),
+				FileSystem: lib.WebDavDir{
+					Dir:     webdav.Dir(getOpt(flags, "scope")),
+					NoSniff: getOptB(flags, "nosniff"),
+				},
+				LockSystem: webdav.NewMemLS(),
+			},
+		},
+		Debug:   getOptB(flags, "debug"),
+		Auth:    getOptB(flags, "auth"),
+		NoSniff: getOptB(flags, "nosniff"),
+		Cors: lib.CorsCfg{
+			Enabled:     false,
+			Credentials: false,
+		},
+		Users:     map[string]*lib.User{},
+		LogFormat: getOpt(flags, "log_format"),
+	}
+
+	rawRules := v.Get("rules")
+	if rules, ok := rawRules.([]interface{}); ok {
+		cfg.User.Rules = parseRules(rules, cfg.User.Modify)
+	}
+
+	rawUsers := v.Get("users")
+	if users, ok := rawUsers.([]interface{}); ok {
+		parseUsers(users, cfg)
+	}
+
+	rawCors := v.Get("cors")
+	if cors, ok := rawCors.(map[string]interface{}); ok {
+		parseCors(cors, cfg)
+	}
+
+	if len(cfg.Users) != 0 && !cfg.Auth {
+		log.Print("Users will be ignored due to auth=false")
+	}
+
+	return cfg
+}

cmd/root.go

@@ -0,0 +1,126 @@
+package cmd
+
+import (
+	"log"
+	"net"
+	"net/http"
+	"strings"
+
+	"github.com/spf13/cobra"
+	v "github.com/spf13/viper"
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
+)
+
+var (
+	cfgFile string
+)
+
+func init() {
+	cobra.OnInitialize(initConfig)
+
+	flags := rootCmd.Flags()
+	flags.StringVarP(&cfgFile, "config", "c", "", "config file path")
+	flags.BoolP("tls", "t", false, "enable tls")
+	flags.Bool("auth", true, "enable auth")
+	flags.String("cert", "cert.pem", "TLS certificate")
+	flags.String("key", "key.pem", "TLS key")
+	flags.StringP("address", "a", "0.0.0.0", "address to listen to")
+	flags.StringP("port", "p", "0", "port to listen to")
+	flags.StringP("prefix", "P", "/", "URL path prefix")
+	flags.String("log_format", "console", "logging format")
+}
+
+var rootCmd = &cobra.Command{
+	Use:   "webdav",
+	Short: "A simple to use WebDAV server",
+	Long: `If you don't set "config", it will look for a configuration file called
+config.{json, toml, yaml, yml} in the following directories:
+
+- ./
+- /etc/webdav/
+
+The precedence of the configuration values are as follows:
+
+- flags
+- environment variables
+- configuration file
+- defaults
+
+The environment variables are prefixed by "WD_" followed by the option
+name in caps. So to set "cert" via an env variable, you should
+set WD_CERT.`,
+	Run: func(cmd *cobra.Command, args []string) {
+		flags := cmd.Flags()
+
+		cfg := readConfig(flags)
+
+		// Build address and listener
+		laddr := getOpt(flags, "address")
+		var lnet string
+		if strings.HasPrefix(laddr, "unix:") {
+			laddr = laddr[5:]
+			lnet = "unix"
+		} else {
+			laddr = laddr + ":" + getOpt(flags, "port")
+			lnet = "tcp"
+		}
+		listener, err := net.Listen(lnet, laddr)
+		if err != nil {
+			log.Fatal(err)
+		}
+		loggerConfig := zap.NewProductionConfig()
+		loggerConfig.DisableCaller = true
+		if cfg.Debug {
+			loggerConfig.Level = zap.NewAtomicLevelAt(zap.DebugLevel)
+		}
+		loggerConfig.EncoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder
+		loggerConfig.Encoding = cfg.LogFormat
+		logger, err := loggerConfig.Build()
+		if err != nil {
+			// if we fail to configure proper logging, then the user has deliberately
+			// misconfigured the logger. Abort.
+			panic(err)
+		}
+		zap.ReplaceGlobals(logger)
+		defer func() {
+			_ = zap.L().Sync()
+		}()
+		// Tell the user the port in which is listening.
+		zap.L().Info("Listening", zap.String("address", listener.Addr().String()))
+
+		// Starts the server.
+		if getOptB(flags, "tls") {
+			if err := http.ServeTLS(listener, cfg, getOpt(flags, "cert"), getOpt(flags, "key")); err != nil {
+				zap.L().Fatal("shutting server", zap.Error(err))
+			}
+		} else {
+			if err := http.Serve(listener, cfg); err != nil {
+				zap.L().Fatal("shutting server", zap.Error(err))
+			}
+		}
+	},
+}
+
+func initConfig() {
+	if cfgFile == "" {
+		v.AddConfigPath(".")
+		v.AddConfigPath("/etc/webdav/")
+		v.SetConfigName("config")
+	} else {
+		v.SetConfigFile(cfgFile)
+	}
+
+	v.SetEnvPrefix("WD")
+	v.AutomaticEnv()
+	v.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
+
+	if err := v.ReadInConfig(); err != nil {
+		if _, ok := err.(v.ConfigParseError); ok {
+			panic(err)
+		}
+		cfgFile = "No config file used"
+	} else {
+		cfgFile = "Using config file: " + v.ConfigFileUsed()
+	}
+}

cmd/version.go

@@ -0,0 +1,19 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+var version = "(untracked)"
+
+func init() {
+	rootCmd.AddCommand(&cobra.Command{
+		Use:   "version",
+		Short: "Print the version number",
+		Run: func(cmd *cobra.Command, args []string) {
+			fmt.Println("WebDAV version " + version)
+		},
+	})
+}

cmd/viper.go

@@ -0,0 +1,55 @@
+package cmd
+
+import (
+	"log"
+
+	"github.com/spf13/pflag"
+	v "github.com/spf13/viper"
+)
+
+// getOption returns a parameter as a string.
+//
+// NOTE: we could simply bind the flags to viper and use IsSet.
+// Although there is a bug on Viper that always returns true on IsSet
+// if a flag is binded. Our alternative way is to manually check
+// the flag and then the value from env/config/gotten by viper.
+// https://github.com/spf13/viper/pull/331
+func getOpt(flags *pflag.FlagSet, key string) string {
+	value, _ := flags.GetString(key)
+
+	// If set on Flags, use it.
+	if flags.Changed(key) {
+		return value
+	}
+
+	// If set through viper (env, config), return it.
+	if v.IsSet(key) {
+		return v.GetString(key)
+	}
+
+	// Otherwise use default value on flags.
+	return value
+}
+
+func getOptB(flags *pflag.FlagSet, key string) bool {
+	value, _ := flags.GetBool(key)
+
+	// If set on Flags, use it.
+	if flags.Changed(key) {
+		return value
+	}
+
+	// If set through viper (env, config), return it.
+	if v.IsSet(key) {
+		return v.GetBool(key)
+	}
+
+	// Otherwise use default value on flags.
+	return value
+}
+
+func checkErr(err error) {
+	if err != nil {
+		log.Fatal(err)
+	}
+}

cmd/webdav/main.go

@@ -1,276 +0,0 @@
-package main
-
-import (
-	"encoding/json"
-	"flag"
-	"fmt"
-	"io/ioutil"
-	"log"
-	"net"
-	"net/http"
-	"os"
-	"path/filepath"
-	"regexp"
-	"strings"
-
-	"github.com/hacdias/webdav"
-	"golang.org/x/crypto/bcrypt"
-	wd "golang.org/x/net/webdav"
-	yaml "gopkg.in/yaml.v2"
-)
-
-var (
-	config         string
-	defaultConfigs = []string{
-		"config.json",
-		"config.yaml",
-		"config.yml",
-		"/etc/webdav/config.json",
-		"/etc/webdav/config.yaml",
-		"/etc/webdav/config.yml",
-	}
-)
-
-func init() {
-	flag.StringVar(&config, "config", "", "Configuration file")
-}
-
-func parseRules(raw []map[string]interface{}) []*webdav.Rule {
-	rules := []*webdav.Rule{}
-
-	for _, r := range raw {
-		rule := &webdav.Rule{
-			Regex: false,
-			Allow: false,
-			Path:  "",
-		}
-
-		if regex, ok := r["regex"].(bool); ok {
-			rule.Regex = regex
-		}
-
-		if allow, ok := r["allow"].(bool); ok {
-			rule.Allow = allow
-		}
-
-		path, ok := r["rule"].(string)
-		if !ok {
-			continue
-		}
-
-		if rule.Regex {
-			rule.Regexp = regexp.MustCompile(path)
-		} else {
-			rule.Path = path
-		}
-
-		rules = append(rules, rule)
-	}
-
-	return rules
-}
-
-func parseUsers(raw []map[string]interface{}, c *cfg) {
-	for _, r := range raw {
-		username, ok := r["username"].(string)
-		if !ok {
-			log.Fatal("user needs an username")
-		}
-
-		password, ok := r["password"].(string)
-		if !ok {
-			log.Fatal("user needs a password")
-		}
-
-		c.auth[username] = password
-
-		user := &webdav.User{
-			Scope:  c.webdav.User.Scope,
-			Modify: c.webdav.User.Modify,
-			Rules:  c.webdav.User.Rules,
-		}
-
-		if scope, ok := r["scope"].(string); ok {
-			user.Scope = scope
-		}
-
-		if modify, ok := r["modify"].(bool); ok {
-			user.Modify = modify
-		}
-
-		if rules, ok := r["rules"].([]map[string]interface{}); ok {
-			user.Rules = parseRules(rules)
-		}
-
-		user.Handler = &wd.Handler{
-			FileSystem: wd.Dir(user.Scope),
-			LockSystem: wd.NewMemLS(),
-		}
-
-		c.webdav.Users[username] = user
-	}
-}
-
-func getConfig() []byte {
-	if config == "" {
-		for _, v := range defaultConfigs {
-			_, err := os.Stat(v)
-			if err == nil {
-				config = v
-				break
-			}
-		}
-	}
-
-	if config == "" {
-		log.Fatal("no config file specified; couldn't find any config.{yaml,json}")
-	}
-
-	file, err := ioutil.ReadFile(config)
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	return file
-}
-
-type cfg struct {
-	webdav  *webdav.Config
-	address string
-	port    string
-	tls     bool
-	cert    string
-	key     string
-	auth    map[string]string
-}
-
-func parseConfig() *cfg {
-	file := getConfig()
-
-	data := struct {
-		Address string                   `json:"address" yaml:"address"`
-		Port    string                   `json:"port" yaml:"port"`
-		TLS     bool                     `json:"tls" yaml:"tls"`
-		Cert    string                   `json:"cert" yaml:"cert"`
-		Key     string                   `json:"key" yaml:"key"`
-		Scope   string                   `json:"scope" yaml:"scope"`
-		Modify  bool                     `json:"modify" yaml:"modify"`
-		Rules   []map[string]interface{} `json:"rules" yaml:"rules"`
-		Users   []map[string]interface{} `json:"users" yaml:"users"`
-	}{
-		Address: "0.0.0.0",
-		Port:    "0",
-		TLS:     false,
-		Cert:    "cert.pem",
-		Key:     "key.pem",
-		Scope:   "./",
-		Modify:  true,
-	}
-
-	var err error
-	if filepath.Ext(config) == ".json" {
-		err = json.Unmarshal(file, &data)
-	} else {
-		err = yaml.Unmarshal(file, &data)
-	}
-
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	config := &cfg{
-		address: data.Address,
-		port:    data.Port,
-		tls:     data.TLS,
-		cert:    data.Cert,
-		key:     data.Key,
-		auth:    map[string]string{},
-		webdav: &webdav.Config{
-			User: &webdav.User{
-				Scope:  data.Scope,
-				Modify: data.Modify,
-				Rules:  []*webdav.Rule{},
-				Handler: &wd.Handler{
-					FileSystem: wd.Dir(data.Scope),
-					LockSystem: wd.NewMemLS(),
-				},
-			},
-			Users: map[string]*webdav.User{},
-		},
-	}
-
-	if len(data.Users) == 0 {
-		log.Fatal("no user defined")
-	}
-
-	if len(data.Rules) != 0 {
-		config.webdav.User.Rules = parseRules(data.Rules)
-	}
-
-	parseUsers(data.Users, config)
-	return config
-}
-
-func basicAuth(c *cfg) http.Handler {
-	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("WWW-Authenticate", `Basic realm="Restricted"`)
-
-		username, password, authOK := r.BasicAuth()
-		if authOK == false {
-			http.Error(w, "Not authorized", 401)
-			return
-		}
-
-		p, ok := c.auth[username]
-		if !ok {
-			http.Error(w, "Not authorized", 401)
-			return
-		}
-
-		if !checkPassword(p, password) {
-			log.Println("Wrong Password for user", username)
-			http.Error(w, "Not authorized", 401)
-			return
-		}
-
-		c.webdav.ServeHTTP(w, r)
-	})
-}
-
-func checkPassword(saved, input string) bool {
-
-	if strings.HasPrefix(saved, "{bcrypt}") {
-		savedPassword := strings.TrimPrefix(saved, "{bcrypt}")
-		return bcrypt.CompareHashAndPassword([]byte(savedPassword), []byte(input)) == nil
-	}
-
-	return saved == input
-}
-
-func main() {
-	flag.Parse()
-	cfg := parseConfig()
-	handler := basicAuth(cfg)
-
-	// Builds the address and a listener.
-	laddr := cfg.address + ":" + cfg.port
-	listener, err := net.Listen("tcp", laddr)
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	// Tell the user the port in which is listening.
-	fmt.Println("Listening on", listener.Addr().String())
-
-	// Starts the server.
-	if cfg.tls {
-		if err := http.ServeTLS(listener, handler, cfg.cert, cfg.key); err != nil {
-			log.Fatal(err)
-		}
-	} else {
-		if err := http.Serve(listener, handler); err != nil {
-			log.Fatal(err)
-		}
-
-	}
-}

go.mod

@@ -0,0 +1,23 @@
+module github.com/hacdias/webdav/v4
+
+go 1.16
+
+require (
+	github.com/fsnotify/fsnotify v1.4.9 // indirect
+	github.com/magiconair/properties v1.8.5 // indirect
+	github.com/mitchellh/mapstructure v1.4.1 // indirect
+	github.com/pelletier/go-toml v1.9.3 // indirect
+	github.com/spf13/afero v1.6.0 // indirect
+	github.com/spf13/cast v1.3.1 // indirect
+	github.com/spf13/cobra v1.1.3
+	github.com/spf13/jwalterweatherman v1.1.0 // indirect
+	github.com/spf13/pflag v1.0.5
+	github.com/spf13/viper v1.7.1
+	go.uber.org/zap v1.19.0
+	golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a
+	golang.org/x/net v0.0.0-20210614182718-04defd469f4e
+	golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1 // indirect
+	gopkg.in/ini.v1 v1.62.0 // indirect
+)
+
+retract v4.1.0

go.sum

@@ -0,0 +1,355 @@
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lib/dir.go

@@ -0,0 +1,83 @@
+package lib
+
+import (
+	"context"
+	"mime"
+	"os"
+	"path"
+
+	"golang.org/x/net/webdav"
+)
+
+// NoSniffFileInfo wraps any generic FileInfo interface and bypasses mime type sniffing.
+type NoSniffFileInfo struct {
+	os.FileInfo
+}
+
+func (w NoSniffFileInfo) ContentType(ctx context.Context) (contentType string, err error) {
+	if mimeType := mime.TypeByExtension(path.Ext(w.FileInfo.Name())); mimeType != "" {
+		// We can figure out the mime from the extension.
+		return mimeType, nil
+	} else {
+		// We can't figure out the mime type without sniffing, call it an octet stream.
+		return "application/octet-stream", nil
+	}
+}
+
+type WebDavDir struct {
+	webdav.Dir
+	NoSniff bool
+}
+
+func (d WebDavDir) Stat(ctx context.Context, name string) (os.FileInfo, error) {
+	// Skip wrapping if NoSniff is off
+	if !d.NoSniff {
+		return d.Dir.Stat(ctx, name)
+	}
+
+	info, err := d.Dir.Stat(ctx, name)
+	if err != nil {
+		return nil, err
+	}
+
+	return NoSniffFileInfo{info}, nil
+}
+
+func (d WebDavDir) OpenFile(ctx context.Context, name string, flag int, perm os.FileMode) (webdav.File, error) {
+	// Skip wrapping if NoSniff is off
+	if !d.NoSniff {
+		return d.Dir.OpenFile(ctx, name, flag, perm)
+	}
+
+	file, err := d.Dir.OpenFile(ctx, name, flag, perm)
+	if err != nil {
+		return nil, err
+	}
+
+	return WebDavFile{File: file}, nil
+}
+
+type WebDavFile struct {
+	webdav.File
+}
+
+func (f WebDavFile) Stat() (os.FileInfo, error) {
+	info, err := f.File.Stat()
+	if err != nil {
+		return nil, err
+	}
+
+	return NoSniffFileInfo{info}, nil
+}
+
+func (f WebDavFile) Readdir(count int) (fis []os.FileInfo, err error) {
+	fis, err = f.File.Readdir(count)
+	if err != nil {
+		return nil, err
+	}
+
+	for i := range fis {
+		fis[i] = NoSniffFileInfo{fis[i]}
+	}
+	return fis, nil
+}

lib/user.go

@@ -0,0 +1,50 @@
+package lib
+
+import (
+	"regexp"
+	"strings"
+
+	"golang.org/x/net/webdav"
+)
+
+// Rule is a dissalow/allow rule.
+type Rule struct {
+	Regex  bool
+	Allow  bool
+	Modify bool
+	Path   string
+	Regexp *regexp.Regexp
+}
+
+// User contains the settings of each user.
+type User struct {
+	Username string
+	Password string
+	Scope    string
+	Modify   bool
+	Rules    []*Rule
+	Handler  *webdav.Handler
+}
+
+// Allowed checks if the user has permission to access a directory/file
+func (u User) Allowed(url string, noModification bool) bool {
+	var rule *Rule
+	i := len(u.Rules) - 1
+
+	for i >= 0 {
+		rule = u.Rules[i]
+
+		isAllowed := rule.Allow && (noModification || rule.Modify)
+		if rule.Regex {
+			if rule.Regexp.MatchString(url) {
+				return isAllowed
+			}
+		} else if strings.HasPrefix(url, rule.Path) {
+			return isAllowed
+		}
+
+		i--
+	}
+
+	return noModification || u.Modify
+}

lib/utils.go

@@ -0,0 +1,25 @@
+package lib
+
+import (
+	"strings"
+
+	"golang.org/x/crypto/bcrypt"
+)
+
+func checkPassword(saved, input string) bool {
+	if strings.HasPrefix(saved, "{bcrypt}") {
+		savedPassword := strings.TrimPrefix(saved, "{bcrypt}")
+		return bcrypt.CompareHashAndPassword([]byte(savedPassword), []byte(input)) == nil
+	}
+
+	return saved == input
+}
+
+func isAllowedHost(allowedHosts []string, origin string) bool {
+	for _, host := range allowedHosts {
+		if host == origin {
+			return true
+		}
+	}
+	return false
+}

lib/webdav.go

@@ -0,0 +1,174 @@
+package lib
+
+import (
+	"context"
+	"net/http"
+	"strings"
+
+	"go.uber.org/zap"
+)
+
+// CorsCfg is the CORS config.
+type CorsCfg struct {
+	Enabled        bool
+	Credentials    bool
+	AllowedHeaders []string
+	AllowedHosts   []string
+	AllowedMethods []string
+	ExposedHeaders []string
+}
+
+// Config is the configuration of a WebDAV instance.
+type Config struct {
+	*User
+	Auth      bool
+	Debug     bool
+	NoSniff   bool
+	Cors      CorsCfg
+	Users     map[string]*User
+	LogFormat string
+}
+
+// ServeHTTP determines if the request is for this plugin, and if all prerequisites are met.
+func (c *Config) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	u := c.User
+	requestOrigin := r.Header.Get("Origin")
+
+	// Add CORS headers before any operation so even on a 401 unauthorized status, CORS will work.
+	if c.Cors.Enabled && requestOrigin != "" {
+		headers := w.Header()
+
+		allowedHeaders := strings.Join(c.Cors.AllowedHeaders, ", ")
+		allowedMethods := strings.Join(c.Cors.AllowedMethods, ", ")
+		exposedHeaders := strings.Join(c.Cors.ExposedHeaders, ", ")
+
+		allowAllHosts := len(c.Cors.AllowedHosts) == 1 && c.Cors.AllowedHosts[0] == "*"
+		allowedHost := isAllowedHost(c.Cors.AllowedHosts, requestOrigin)
+
+		if allowAllHosts {
+			headers.Set("Access-Control-Allow-Origin", "*")
+		} else if allowedHost {
+			headers.Set("Access-Control-Allow-Origin", requestOrigin)
+		}
+
+		if allowAllHosts || allowedHost {
+			headers.Set("Access-Control-Allow-Headers", allowedHeaders)
+			headers.Set("Access-Control-Allow-Methods", allowedMethods)
+
+			if c.Cors.Credentials {
+				headers.Set("Access-Control-Allow-Credentials", "true")
+			}
+
+			if len(c.Cors.ExposedHeaders) > 0 {
+				headers.Set("Access-Control-Expose-Headers", exposedHeaders)
+			}
+		}
+	}
+
+	if r.Method == "OPTIONS" && c.Cors.Enabled && requestOrigin != "" {
+		return
+	}
+
+	// Authentication
+	if c.Auth {
+		w.Header().Set("WWW-Authenticate", `Basic realm="Restricted"`)
+
+		// Gets the correct user for this request.
+		username, password, ok := r.BasicAuth()
+		zap.L().Info("login attempt", zap.String("username", username), zap.String("remote_address", r.RemoteAddr))
+		if !ok {
+			http.Error(w, "Not authorized", 401)
+			return
+		}
+
+		user, ok := c.Users[username]
+		if !ok {
+			http.Error(w, "Not authorized", 401)
+			return
+		}
+
+		if !checkPassword(user.Password, password) {
+			zap.L().Info("invalid password", zap.String("username", username), zap.String("remote_address", r.RemoteAddr))
+			http.Error(w, "Not authorized", 401)
+			return
+		}
+
+		u = user
+		zap.L().Info("user authorized", zap.String("username", username))
+	} else {
+		// Even if Auth is disabled, we might want to get
+		// the user from the Basic Auth header. Useful for Caddy
+		// plugin implementation.
+		username, _, ok := r.BasicAuth()
+		if ok {
+			if user, ok := c.Users[username]; ok {
+				u = user
+			}
+		}
+	}
+
+	// Checks for user permissions relatively to this PATH.
+	noModification := r.Method == "GET" || r.Method == "HEAD" ||
+		r.Method == "OPTIONS" || r.Method == "PROPFIND"
+
+	allowed := u.Allowed(r.URL.Path, noModification)
+
+	zap.L().Debug("allowed & method & path", zap.Bool("allowed", allowed), zap.String("method", r.Method), zap.String("path", r.URL.Path))
+
+	if !allowed {
+		w.WriteHeader(http.StatusForbidden)
+		return
+	}
+
+	if r.Method == "HEAD" {
+		w = newResponseWriterNoBody(w)
+	}
+
+	// Excerpt from RFC4918, section 9.4:
+	//
+	// 		GET, when applied to a collection, may return the contents of an
+	//		"index.html" resource, a human-readable view of the contents of
+	//		the collection, or something else altogether.
+	//
+	// Get, when applied to collection, will return the same as PROPFIND method.
+	if r.Method == "GET" && strings.HasPrefix(r.URL.Path, u.Handler.Prefix) {
+		info, err := u.Handler.FileSystem.Stat(context.TODO(), strings.TrimPrefix(r.URL.Path, u.Handler.Prefix))
+		if err == nil && info.IsDir() {
+			r.Method = "PROPFIND"
+
+			if r.Header.Get("Depth") == "" {
+				r.Header.Add("Depth", "1")
+			}
+		}
+	}
+
+	// Runs the WebDAV.
+	//u.Handler.LockSystem = webdav.NewMemLS()
+	u.Handler.ServeHTTP(w, r)
+}
+
+// responseWriterNoBody is a wrapper used to suprress the body of the response
+// to a request. Mainly used for HEAD requests.
+type responseWriterNoBody struct {
+	http.ResponseWriter
+}
+
+// newResponseWriterNoBody creates a new responseWriterNoBody.
+func newResponseWriterNoBody(w http.ResponseWriter) *responseWriterNoBody {
+	return &responseWriterNoBody{w}
+}
+
+// Header executes the Header method from the http.ResponseWriter.
+func (w responseWriterNoBody) Header() http.Header {
+	return w.ResponseWriter.Header()
+}
+
+// Write suprresses the body.
+func (w responseWriterNoBody) Write(data []byte) (int, error) {
+	return 0, nil
+}
+
+// WriteHeader writes the header to the http.ResponseWriter.
+func (w responseWriterNoBody) WriteHeader(statusCode int) {
+	w.ResponseWriter.WriteHeader(statusCode)
+}

main.go

@@ -0,0 +1,9 @@
+package main
+
+import (
+	"github.com/hacdias/webdav/v4/cmd"
+)
+
+func main() {
+	cmd.Execute()
+}

readme.md

@@ -1,33 +0,0 @@
-# webdav
-
-[![Build](https://img.shields.io/travis/hacdias/webdav.svg?style=flat-square)](https://travis-ci.org/hacdias/webdav)
-[![Go Report Card](https://goreportcard.com/badge/github.com/hacdias/webdav?style=flat-square)](https://goreportcard.com/report/hacdias/webdav)
-
-```webdav``` is a simple tool that creates a WebDAV server for you. By default, it runs on a random free port and supports JSON and YAML configuration. Here is a simple YAML configuration example:
-
-```yaml
-scope: /path/to/files
-address: 0.0.0.0
-port: 8080
-tls: false
-cert: cert.pem
-key: key.pem
-users:
-  - username: admin
-    password: admin
-  - username: encrypted
-    password: "{bcrypt}$2y$10$zEP6oofmXFeHaeMfBNLnP.DO8m.H.Mwhd24/TOX2MWLxAExXi4qgi"
-  - username: basic
-    password: basic
-    modify:   false
-    rules:
-      - regex: false
-      - allow: false
-      - path: /some/file
-```
-
-You can specify the path to the configuration file using the `--config` flag. By default, it will search for a `config.{yaml,json}` file on your current working directory.
-
-An example of how to use this with `systemd` is on [webdav.service.example](/webdav.service.example).
-
-Download it [here](https://github.com/hacdias/webdav/releases).

webdav.go

@@ -1,129 +0,0 @@
-package webdav
-
-import (
-	"context"
-	"net/http"
-	"regexp"
-	"strings"
-
-	"golang.org/x/net/webdav"
-)
-
-// Config is the configuration of a WebDAV instance.
-type Config struct {
-	*User
-	Users map[string]*User
-}
-
-// ServeHTTP determines if the request is for this plugin, and if all prerequisites are met.
-func (c *Config) ServeHTTP(w http.ResponseWriter, r *http.Request) {
-	u := c.User
-
-	// Gets the correct user for this request.
-	username, _, ok := r.BasicAuth()
-	if ok {
-		if user, ok := c.Users[username]; ok {
-			u = user
-		}
-	}
-
-	// Checks for user permissions relatively to this PATH.
-	if !u.Allowed(r.URL.Path) {
-		w.WriteHeader(http.StatusForbidden)
-		return
-	}
-
-	if r.Method == "HEAD" {
-		w = newResponseWriterNoBody(w)
-	}
-
-	// If this request modified the files and the user doesn't have permission
-	// to do so, return forbidden.
-	if (r.Method == "PUT" || r.Method == "POST" || r.Method == "MKCOL" ||
-		r.Method == "DELETE" || r.Method == "COPY" || r.Method == "MOVE") &&
-		!u.Modify {
-		w.WriteHeader(http.StatusForbidden)
-		return
-	}
-
-	// Excerpt from RFC4918, section 9.4:
-	//
-	// 		GET, when applied to a collection, may return the contents of an
-	//		"index.html" resource, a human-readable view of the contents of
-	//		the collection, or something else altogether.
-	//
-	// Get, when applied to collection, will return the same as PROPFIND method.
-	if r.Method == "GET" {
-		info, err := u.Handler.FileSystem.Stat(context.TODO(), r.URL.Path)
-		if err == nil && info.IsDir() {
-			r.Method = "PROPFIND"
-		}
-	}
-
-	// Runs the WebDAV.
-	u.Handler.ServeHTTP(w, r)
-}
-
-// Rule is a dissalow/allow rule.
-type Rule struct {
-	Regex  bool
-	Allow  bool
-	Path   string
-	Regexp *regexp.Regexp
-}
-
-// User contains the settings of each user.
-type User struct {
-	Scope   string
-	Modify  bool
-	Rules   []*Rule
-	Handler *webdav.Handler
-}
-
-// Allowed checks if the user has permission to access a directory/file
-func (u User) Allowed(url string) bool {
-	var rule *Rule
-	i := len(u.Rules) - 1
-
-	for i >= 0 {
-		rule = u.Rules[i]
-
-		if rule.Regex {
-			if rule.Regexp.MatchString(url) {
-				return rule.Allow
-			}
-		} else if strings.HasPrefix(url, rule.Path) {
-			return rule.Allow
-		}
-
-		i--
-	}
-
-	return true
-}
-
-// responseWriterNoBody is a wrapper used to suprress the body of the response
-// to a request. Mainly used for HEAD requests.
-type responseWriterNoBody struct {
-	http.ResponseWriter
-}
-
-// newResponseWriterNoBody creates a new responseWriterNoBody.
-func newResponseWriterNoBody(w http.ResponseWriter) *responseWriterNoBody {
-	return &responseWriterNoBody{w}
-}
-
-// Header executes the Header method from the http.ResponseWriter.
-func (w responseWriterNoBody) Header() http.Header {
-	return w.ResponseWriter.Header()
-}
-
-// Write suprresses the body.
-func (w responseWriterNoBody) Write(data []byte) (int, error) {
-	return 0, nil
-}
-
-// WriteHeader writes the header to the http.ResponseWriter.
-func (w responseWriterNoBody) WriteHeader(statusCode int) {
-	w.ResponseWriter.WriteHeader(statusCode)
-}