fix #6: added gowebdav and webdav interface (TODO: webdav tests)

auth.go

@@ -2,7 +2,10 @@ package gonextcloud
 
 import (
 	"fmt"
+
 	req "github.com/levigross/grequests"
+	"github.com/studio-b12/gowebdav"
+
 	"gitlab.bertha.cloud/partitio/Nextcloud-Partitio/gonextcloud/types"
 )
 
@@ -33,6 +36,8 @@ func (c *Client) Login(username string, password string) error {
 		e := types.APIError{Message: "authentication failed"}
 		return &e
 	}
+	// Create webdav client
+	c.webdav = gowebdav.NewClient(c.baseURL.String()+"/remote.php/webdav", c.username, c.password)
 	return nil
 }
 

client.go

@@ -1,9 +1,12 @@
 package gonextcloud
 
 import (
-	req "github.com/levigross/grequests"
-	"gitlab.bertha.cloud/partitio/Nextcloud-Partitio/gonextcloud/types"
 	"net/url"
+
+	req "github.com/levigross/grequests"
+	"github.com/studio-b12/gowebdav"
+
+	"gitlab.bertha.cloud/partitio/Nextcloud-Partitio/gonextcloud/types"
 )
 
 // Client is the API client that performs all operations against a Nextcloud server.
@@ -23,6 +26,7 @@ type Client struct {
 	shares        *Shares
 	users         *Users
 	groups        *Groups
+	webdav        *gowebdav.Client
 }
 
 // NewClient create a new Client from the Nextcloud Instance URL
@@ -42,6 +46,7 @@ func NewClient(hostname string) (*Client, error) {
 			"Accept":         "application/json",
 		},
 	}
+
 	c.apps = &Apps{c}
 	c.appsConfig = &AppsConfig{c}
 	c.groupFolders = &GroupFolders{c}
@@ -49,6 +54,9 @@ func NewClient(hostname string) (*Client, error) {
 	c.shares = &Shares{c}
 	c.users = &Users{c}
 	c.groups = &Groups{c}
+	// Create empty webdav client
+	// It will be replaced after login
+	c.webdav = &gowebdav.Client{}
 	return c, nil
 }
 
@@ -86,3 +94,8 @@ func (c *Client) Users() types.Users {
 func (c *Client) Groups() types.Groups {
 	return c.groups
 }
+
+// WebDav return the WebDav client Interface
+func (c *Client) WebDav() types.WebDav {
+	return c.webdav
+}

go.mod

@@ -9,6 +9,7 @@ require (
 	github.com/pkg/errors v0.0.0-20181023235946-059132a15dd0
 	github.com/sirupsen/logrus v1.4.2
 	github.com/stretchr/testify v1.2.2
+	github.com/studio-b12/gowebdav v0.0.0-20190103184047-38f79aeaf1ac
 	golang.org/x/net v0.0.0-20181129055619-fae4c4e3ad76 // indirect
 	gopkg.in/yaml.v2 v2.2.1
 )

go.sum

@@ -18,6 +18,8 @@ github.com/stretchr/objx v0.1.1 h1:2vfRuCMp5sSVIDSqO8oNnWJq7mPa6KVP3iPIwFBuy8A=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+github.com/studio-b12/gowebdav v0.0.0-20190103184047-38f79aeaf1ac h1:xQ9gCVzqb939vjhxuES4IXYe4AlHB4Q71/K06aazQmQ=
+github.com/studio-b12/gowebdav v0.0.0-20190103184047-38f79aeaf1ac/go.mod h1:gCcfDlA1Y7GqOaeEKw5l9dOGx1VLdc/HuQSlQAaZ30s=
 golang.org/x/net v0.0.0-20181129055619-fae4c4e3ad76 h1:xx5MUFyRQRbPk6VjWjIE1epE/K5AoDD8QUN116NCy8k=
 golang.org/x/net v0.0.0-20181129055619-fae4c4e3ad76/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/sys v0.0.0-20190422165155-953cdadca894 h1:Cz4ceDQGXuKRnVBDTS23GTn/pU5OE2C0WrNTOYK1Uuc=

types/interfaces.go

@@ -9,6 +9,7 @@ type Client interface {
 	Shares() Shares
 	Users() Users
 	Groups() Groups
+	WebDav() WebDav
 	Login(username string, password string) error
 	Logout() error
 }

types/webdav.go

@@ -0,0 +1,34 @@
+package types
+
+import (
+	"io"
+	"os"
+)
+
+// WebDav available methods
+type WebDav interface {
+	// ReadDir reads the contents of a remote directory
+	ReadDir(path string) ([]os.FileInfo, error)
+	// Stat returns the file stats for a specified path
+	Stat(path string) (os.FileInfo, error)
+	// Remove removes a remote file
+	Remove(path string) error
+	// RemoveAll removes remote files
+	RemoveAll(path string) error
+	// Mkdir makes a directory
+	Mkdir(path string, _ os.FileMode) error
+	// MkdirAll like mkdir -p, but for webdav
+	MkdirAll(path string, _ os.FileMode) error
+	// Rename moves a file from A to B
+	Rename(oldpath, newpath string, overwrite bool) error
+	// Copy copies a file from A to B
+	Copy(oldpath, newpath string, overwrite bool) error
+	// Read reads the contents of a remote file
+	Read(path string) ([]byte, error)
+	// ReadStream reads the stream for a given path
+	ReadStream(path string) (io.ReadCloser, error)
+	// Write writes data to a given path
+	Write(path string, data []byte, _ os.FileMode) error
+	// WriteStream writes a stream
+	WriteStream(path string, stream io.Reader, _ os.FileMode) error
+}

vendor/github.com/studio-b12/gowebdav/.gitignore

@@ -0,0 +1,19 @@
+# Folders to ignore
+/src
+/bin
+/pkg
+/gowebdav
+/.idea
+
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, build with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out

vendor/github.com/studio-b12/gowebdav/.travis.yml

@@ -0,0 +1,10 @@
+language: go
+
+go:
+  - "1.x"
+
+install:
+  - go get ./...
+
+script:
+  - go test -v --short ./...

vendor/github.com/studio-b12/gowebdav/LICENSE

@@ -0,0 +1,27 @@
+Copyright (c) 2014, Studio B12 GmbH
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its contributors
+   may be used to endorse or promote products derived from this software without
+   specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/studio-b12/gowebdav/Makefile

@@ -0,0 +1,33 @@
+BIN := gowebdav
+SRC := $(wildcard *.go) cmd/gowebdav/main.go
+
+all: test cmd
+
+cmd: ${BIN}
+
+${BIN}: ${SRC}
+	go build -o $@ ./cmd/gowebdav
+
+test:
+	go test -v --short ./...
+
+api:
+	@sed '/^## API$$/,$$d' -i README.md
+	@echo '## API' >> README.md
+	@godoc2md github.com/studio-b12/gowebdav | sed '/^$$/N;/^\n$$/D' |\
+	sed '2d' |\
+	sed 's/\/src\/github.com\/studio-b12\/gowebdav\//https:\/\/github.com\/studio-b12\/gowebdav\/blob\/master\//g' |\
+	sed 's/\/src\/target\//https:\/\/github.com\/studio-b12\/gowebdav\/blob\/master\//g' |\
+	sed 's/^#/##/g' >> README.md
+
+check:
+	gofmt -w -s $(SRC)
+	@echo
+	gocyclo -over 15 .
+	@echo
+	golint ./...
+
+clean:
+	@rm -f ${BIN}
+
+.PHONY: all cmd clean test api check

vendor/github.com/studio-b12/gowebdav/README.md

@@ -0,0 +1,147 @@
+# GoWebDAV
+
+[![Build Status](https://travis-ci.org/studio-b12/gowebdav.svg?branch=master)](https://travis-ci.org/studio-b12/gowebdav)
+[![GoDoc](https://godoc.org/github.com/studio-b12/gowebdav?status.svg)](https://godoc.org/github.com/studio-b12/gowebdav)
+[![Go Report Card](https://goreportcard.com/badge/github.com/studio-b12/gowebdav)](https://goreportcard.com/report/github.com/studio-b12/gowebdav)
+
+A golang WebDAV client library.
+
+## Main features
+`gowebdav` library allows to perform following actions on the remote WebDAV server:
+* [create path](#create-path-on-a-webdav-server)
+* [get files list](#get-files-list)
+* [download file](#download-file-to-byte-array)
+* [upload file](#upload-file-from-byte-array)
+* [get information about specified file/folder](#get-information-about-specified-filefolder)
+* [move file to another location](#move-file-to-another-location)
+* [copy file to another location](#copy-file-to-another-location)
+* [delete file](#delete-file)
+
+## Usage
+
+First of all you should create `Client` instance using `NewClient()` function:
+
+```go
+root := "https://webdav.mydomain.me"
+user := "user"
+password := "password"
+
+c := gowebdav.NewClient(root, user, password)
+```
+
+After you can use this `Client` to perform actions, described below.
+
+**NOTICE:** we will not check errors in examples, to focus you on the `gowebdav` library's code, but you should do it in your code!
+
+### Create path on a WebDAV server
+```go
+err := c.Mkdir("folder", 0644)
+```
+In case you want to create several folders you can use `c.MkdirAll()`:
+```go
+err := c.MkdirAll("folder/subfolder/subfolder2", 0644)
+```
+
+### Get files list
+```go
+files, _ := c.ReadDir("folder/subfolder")
+for _, file := range files {
+    //notice that [file] has os.FileInfo type
+    fmt.Println(file.Name())
+}
+```
+
+### Download file to byte array
+```go
+webdavFilePath := "folder/subfolder/file.txt"
+localFilePath := "/tmp/webdav/file.txt"
+
+bytes, _ := c.Read(webdavFilePath)
+ioutil.WriteFile(localFilePath, bytes, 0644)
+```
+
+### Download file via reader
+Also you can use `c.ReadStream()` method:
+```go
+webdavFilePath := "folder/subfolder/file.txt"
+localFilePath := "/tmp/webdav/file.txt"
+
+reader, _ := c.ReadStream(webdavFilePath)
+
+file, _ := os.Create(localFilePath)
+defer file.Close()
+
+io.Copy(file, reader)
+```
+
+### Upload file from byte array
+```go
+webdavFilePath := "folder/subfolder/file.txt"
+localFilePath := "/tmp/webdav/file.txt"
+
+bytes, _ := ioutil.ReadFile(localFilePath)
+
+c.Write(webdavFilePath, bytes, 0644)
+```
+
+### Upload file via writer
+```go
+webdavFilePath := "folder/subfolder/file.txt"
+localFilePath := "/tmp/webdav/file.txt"
+
+file, _ := os.Open(localFilePath)
+defer file.Close()
+
+c.WriteStream(webdavFilePath, file, 0644)
+```
+
+### Get information about specified file/folder
+```go
+webdavFilePath := "folder/subfolder/file.txt"
+
+info := c.Stat(webdavFilePath)
+//notice that [info] has os.FileInfo type
+fmt.Println(info)
+```
+
+### Move file to another location
+```go
+oldPath := "folder/subfolder/file.txt"
+newPath := "folder/subfolder/moved.txt"
+isOverwrite := true
+
+c.Rename(oldPath, newPath, isOverwrite)
+```
+
+### Copy file to another location
+```go
+oldPath := "folder/subfolder/file.txt"
+newPath := "folder/subfolder/file-copy.txt"
+isOverwrite := true
+
+c.Copy(oldPath, newPath, isOverwrite)
+```
+
+### Delete file
+```go
+webdavFilePath := "folder/subfolder/file.txt"
+
+c.Remove(webdavFilePath)
+```
+
+## Links
+
+More details about WebDAV server you can read from following resources:
+
+* [RFC 4918 - HTTP Extensions for Web Distributed Authoring and Versioning (WebDAV)](https://tools.ietf.org/html/rfc4918)
+* [RFC 5689 - Extended MKCOL for Web Distributed Authoring and Versioning (WebDAV)](https://tools.ietf.org/html/rfc5689)
+* [RFC 2616 - HTTP/1.1 Status Code Definitions](http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html "HTTP/1.1 Status Code Definitions")
+* [WebDav: Next Generation Collaborative Web Authoring By Lisa Dusseaul](https://books.google.de/books?isbn=0130652083 "WebDav: Next Generation Collaborative Web Authoring By Lisa Dusseault")
+
+**NOTICE**: RFC 2518 is obsoleted by RFC 4918 in June 2007
+
+## Contributing
+All contributing are welcome. If you have any suggestions or find some bug - please create an Issue to let us make this project better. We appreciate your help!
+
+## License
+This library is distributed under the BSD 3-Clause license found in the [LICENSE](https://github.com/studio-b12/gowebdav/blob/master/LICENSE) file.

vendor/github.com/studio-b12/gowebdav/basicAuth.go

@@ -0,0 +1,33 @@
+package gowebdav
+
+import (
+	"encoding/base64"
+)
+
+// BasicAuth structure holds our credentials
+type BasicAuth struct {
+	user string
+	pw   string
+}
+
+// Type identifies the BasicAuthenticator
+func (b *BasicAuth) Type() string {
+	return "BasicAuth"
+}
+
+// User holds the BasicAuth username
+func (b *BasicAuth) User() string {
+	return b.user
+}
+
+// Pass holds the BasicAuth password
+func (b *BasicAuth) Pass() string {
+	return b.pw
+}
+
+// Authorize the current request
+func (b *BasicAuth) Authorize(c *Client, method string, path string) {
+	a := b.user + ":" + b.pw
+	auth := "Basic " + base64.StdEncoding.EncodeToString([]byte(a))
+	c.headers.Set("Authorization", auth)
+}

vendor/github.com/studio-b12/gowebdav/client.go

@@ -0,0 +1,380 @@
+package gowebdav
+
+import (
+	"bytes"
+	"encoding/xml"
+	"io"
+	"net/http"
+	"net/url"
+	"os"
+	pathpkg "path"
+	"strings"
+	"time"
+)
+
+// Client defines our structure
+type Client struct {
+	root    string
+	headers http.Header
+	c       *http.Client
+	auth    Authenticator
+}
+
+// Authenticator stub
+type Authenticator interface {
+	Type() string
+	User() string
+	Pass() string
+	Authorize(*Client, string, string)
+}
+
+// NoAuth structure holds our credentials
+type NoAuth struct {
+	user string
+	pw   string
+}
+
+// Type identifies the authenticator
+func (n *NoAuth) Type() string {
+	return "NoAuth"
+}
+
+// User returns the current user
+func (n *NoAuth) User() string {
+	return n.user
+}
+
+// Pass returns the current password
+func (n *NoAuth) Pass() string {
+	return n.pw
+}
+
+// Authorize the current request
+func (n *NoAuth) Authorize(c *Client, method string, path string) {
+}
+
+// NewClient creates a new instance of client
+func NewClient(uri, user, pw string) *Client {
+	return &Client{FixSlash(uri), make(http.Header), &http.Client{}, &NoAuth{user, pw}}
+}
+
+// SetHeader lets us set arbitrary headers for a given client
+func (c *Client) SetHeader(key, value string) {
+	c.headers.Add(key, value)
+}
+
+// SetTimeout exposes the ability to set a time limit for requests
+func (c *Client) SetTimeout(timeout time.Duration) {
+	c.c.Timeout = timeout
+}
+
+// SetTransport exposes the ability to define custom transports
+func (c *Client) SetTransport(transport http.RoundTripper) {
+	c.c.Transport = transport
+}
+
+// Connect connects to our dav server
+func (c *Client) Connect() error {
+	rs, err := c.options("/")
+	if err != nil {
+		return err
+	}
+
+	err = rs.Body.Close()
+	if err != nil {
+		return err
+	}
+
+	if rs.StatusCode != 200 {
+		return newPathError("Connect", c.root, rs.StatusCode)
+	}
+
+	return nil
+}
+
+type props struct {
+	Status      string   `xml:"DAV: status"`
+	Name        string   `xml:"DAV: prop>displayname,omitempty"`
+	Type        xml.Name `xml:"DAV: prop>resourcetype>collection,omitempty"`
+	Size        string   `xml:"DAV: prop>getcontentlength,omitempty"`
+	ContentType string   `xml:"DAV: prop>getcontenttype,omitempty"`
+	ETag        string   `xml:"DAV: prop>getetag,omitempty"`
+	Modified    string   `xml:"DAV: prop>getlastmodified,omitempty"`
+}
+
+type response struct {
+	Href  string  `xml:"DAV: href"`
+	Props []props `xml:"DAV: propstat"`
+}
+
+func getProps(r *response, status string) *props {
+	for _, prop := range r.Props {
+		if strings.Contains(prop.Status, status) {
+			return &prop
+		}
+	}
+	return nil
+}
+
+// ReadDir reads the contents of a remote directory
+func (c *Client) ReadDir(path string) ([]os.FileInfo, error) {
+	path = FixSlashes(path)
+	files := make([]os.FileInfo, 0)
+	skipSelf := true
+	parse := func(resp interface{}) error {
+		r := resp.(*response)
+
+		if skipSelf {
+			skipSelf = false
+			if p := getProps(r, "200"); p != nil && p.Type.Local == "collection" {
+				r.Props = nil
+				return nil
+			}
+			return newPathError("ReadDir", path, 405)
+		}
+
+		if p := getProps(r, "200"); p != nil {
+			f := new(File)
+			if ps, err := url.QueryUnescape(r.Href); err == nil {
+				f.name = pathpkg.Base(ps)
+			} else {
+				f.name = p.Name
+			}
+			f.path = path + f.name
+			f.modified = parseModified(&p.Modified)
+			f.etag = p.ETag
+			f.contentType = p.ContentType
+
+			if p.Type.Local == "collection" {
+				f.path += "/"
+				f.size = 0
+				f.isdir = true
+			} else {
+				f.size = parseInt64(&p.Size)
+				f.isdir = false
+			}
+
+			files = append(files, *f)
+		}
+
+		r.Props = nil
+		return nil
+	}
+
+	err := c.propfind(path, false,
+		`<d:propfind xmlns:d='DAV:'>
+			<d:prop>
+				<d:displayname/>
+				<d:resourcetype/>
+				<d:getcontentlength/>
+				<d:getcontenttype/>
+				<d:getetag/>
+				<d:getlastmodified/>
+			</d:prop>
+		</d:propfind>`,
+		&response{},
+		parse)
+
+	if err != nil {
+		if _, ok := err.(*os.PathError); !ok {
+			err = newPathErrorErr("ReadDir", path, err)
+		}
+	}
+	return files, err
+}
+
+// Stat returns the file stats for a specified path
+func (c *Client) Stat(path string) (os.FileInfo, error) {
+	var f *File
+	parse := func(resp interface{}) error {
+		r := resp.(*response)
+		if p := getProps(r, "200"); p != nil && f == nil {
+			f = new(File)
+			f.name = p.Name
+			f.path = path
+			f.etag = p.ETag
+			f.contentType = p.ContentType
+
+			if p.Type.Local == "collection" {
+				if !strings.HasSuffix(f.path, "/") {
+					f.path += "/"
+				}
+				f.size = 0
+				f.modified = time.Unix(0, 0)
+				f.isdir = true
+			} else {
+				f.size = parseInt64(&p.Size)
+				f.modified = parseModified(&p.Modified)
+				f.isdir = false
+			}
+		}
+
+		r.Props = nil
+		return nil
+	}
+
+	err := c.propfind(path, true,
+		`<d:propfind xmlns:d='DAV:'>
+			<d:prop>
+				<d:displayname/>
+				<d:resourcetype/>
+				<d:getcontentlength/>
+				<d:getcontenttype/>
+				<d:getetag/>
+				<d:getlastmodified/>
+			</d:prop>
+		</d:propfind>`,
+		&response{},
+		parse)
+
+	if err != nil {
+		if _, ok := err.(*os.PathError); !ok {
+			err = newPathErrorErr("ReadDir", path, err)
+		}
+	}
+	return f, err
+}
+
+// Remove removes a remote file
+func (c *Client) Remove(path string) error {
+	return c.RemoveAll(path)
+}
+
+// RemoveAll removes remote files
+func (c *Client) RemoveAll(path string) error {
+	rs, err := c.req("DELETE", path, nil, nil)
+	if err != nil {
+		return newPathError("Remove", path, 400)
+	}
+	err = rs.Body.Close()
+	if err != nil {
+		return err
+	}
+
+	if rs.StatusCode == 200 || rs.StatusCode == 204 || rs.StatusCode == 404 {
+		return nil
+	}
+
+	return newPathError("Remove", path, rs.StatusCode)
+}
+
+// Mkdir makes a directory
+func (c *Client) Mkdir(path string, _ os.FileMode) error {
+	path = FixSlashes(path)
+	status := c.mkcol(path)
+	if status == 201 {
+		return nil
+	}
+
+	return newPathError("Mkdir", path, status)
+}
+
+// MkdirAll like mkdir -p, but for webdav
+func (c *Client) MkdirAll(path string, _ os.FileMode) error {
+	path = FixSlashes(path)
+	status := c.mkcol(path)
+	if status == 201 {
+		return nil
+	} else if status == 409 {
+		paths := strings.Split(path, "/")
+		sub := "/"
+		for _, e := range paths {
+			if e == "" {
+				continue
+			}
+			sub += e + "/"
+			status = c.mkcol(sub)
+			if status != 201 {
+				return newPathError("MkdirAll", sub, status)
+			}
+		}
+		return nil
+	}
+
+	return newPathError("MkdirAll", path, status)
+}
+
+// Rename moves a file from A to B
+func (c *Client) Rename(oldpath, newpath string, overwrite bool) error {
+	return c.copymove("MOVE", oldpath, newpath, overwrite)
+}
+
+// Copy copies a file from A to B
+func (c *Client) Copy(oldpath, newpath string, overwrite bool) error {
+	return c.copymove("COPY", oldpath, newpath, overwrite)
+}
+
+// Read reads the contents of a remote file
+func (c *Client) Read(path string) ([]byte, error) {
+	var stream io.ReadCloser
+	var err error
+
+	if stream, err = c.ReadStream(path); err != nil {
+		return nil, err
+	}
+	defer stream.Close()
+
+	buf := new(bytes.Buffer)
+	_, err = buf.ReadFrom(stream)
+	if err != nil {
+		return nil, err
+	}
+	return buf.Bytes(), nil
+}
+
+// ReadStream reads the stream for a given path
+func (c *Client) ReadStream(path string) (io.ReadCloser, error) {
+	rs, err := c.req("GET", path, nil, nil)
+	if err != nil {
+		return nil, newPathErrorErr("ReadStream", path, err)
+	}
+
+	if rs.StatusCode == 200 {
+		return rs.Body, nil
+	}
+
+	rs.Body.Close()
+	return nil, newPathError("ReadStream", path, rs.StatusCode)
+}
+
+// Write writes data to a given path
+func (c *Client) Write(path string, data []byte, _ os.FileMode) error {
+	s := c.put(path, bytes.NewReader(data))
+	switch s {
+
+	case 200, 201, 204:
+		return nil
+
+	case 409:
+		err := c.createParentCollection(path)
+		if err != nil {
+			return err
+		}
+
+		s = c.put(path, bytes.NewReader(data))
+		if s == 200 || s == 201 || s == 204 {
+			return nil
+		}
+	}
+
+	return newPathError("Write", path, s)
+}
+
+// WriteStream writes a stream
+func (c *Client) WriteStream(path string, stream io.Reader, _ os.FileMode) error {
+
+	err := c.createParentCollection(path)
+	if err != nil {
+		return err
+	}
+
+	s := c.put(path, stream)
+
+	switch s {
+	case 200, 201, 204:
+		return nil
+
+	default:
+		return newPathError("WriteStream", path, s)
+	}
+}

vendor/github.com/studio-b12/gowebdav/digestAuth.go

@@ -0,0 +1,146 @@
+package gowebdav
+
+import (
+	"crypto/md5"
+	"crypto/rand"
+	"encoding/hex"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+)
+
+// DigestAuth structure holds our credentials
+type DigestAuth struct {
+	user        string
+	pw          string
+	digestParts map[string]string
+}
+
+// Type identifies the DigestAuthenticator
+func (d *DigestAuth) Type() string {
+	return "DigestAuth"
+}
+
+// User holds the DigestAuth username
+func (d *DigestAuth) User() string {
+	return d.user
+}
+
+// Pass holds the DigestAuth password
+func (d *DigestAuth) Pass() string {
+	return d.pw
+}
+
+// Authorize the current request
+func (d *DigestAuth) Authorize(c *Client, method string, path string) {
+	d.digestParts["uri"] = path
+	d.digestParts["method"] = method
+	d.digestParts["username"] = d.user
+	d.digestParts["password"] = d.pw
+	c.headers.Set("Authorization", getDigestAuthorization(d.digestParts))
+}
+
+func digestParts(resp *http.Response) map[string]string {
+	result := map[string]string{}
+	if len(resp.Header["Www-Authenticate"]) > 0 {
+		wantedHeaders := []string{"nonce", "realm", "qop", "opaque", "algorithm", "entityBody"}
+		responseHeaders := strings.Split(resp.Header["Www-Authenticate"][0], ",")
+		for _, r := range responseHeaders {
+			for _, w := range wantedHeaders {
+				if strings.Contains(r, w) {
+					result[w] = strings.Trim(
+						strings.SplitN(r, `=`, 2)[1],
+						`"`,
+					)
+				}
+			}
+		}
+	}
+	return result
+}
+
+func getMD5(text string) string {
+	hasher := md5.New()
+	hasher.Write([]byte(text))
+	return hex.EncodeToString(hasher.Sum(nil))
+}
+
+func getCnonce() string {
+	b := make([]byte, 8)
+	io.ReadFull(rand.Reader, b)
+	return fmt.Sprintf("%x", b)[:16]
+}
+
+func getDigestAuthorization(digestParts map[string]string) string {
+	d := digestParts
+	// These are the correct ha1 and ha2 for qop=auth. We should probably check for other types of qop.
+
+	var (
+		ha1        string
+		ha2        string
+		nonceCount = 00000001
+		cnonce     = getCnonce()
+		response   string
+	)
+
+	// 'ha1' value depends on value of "algorithm" field
+	switch d["algorithm"] {
+	case "MD5", "":
+		ha1 = getMD5(d["username"] + ":" + d["realm"] + ":" + d["password"])
+	case "MD5-sess":
+		ha1 = getMD5(
+			fmt.Sprintf("%s:%v:%s",
+				getMD5(d["username"]+":"+d["realm"]+":"+d["password"]),
+				nonceCount,
+				cnonce,
+			),
+		)
+	}
+
+	// 'ha2' value depends on value of "qop" field
+	switch d["qop"] {
+	case "auth", "":
+		ha2 = getMD5(d["method"] + ":" + d["uri"])
+	case "auth-int":
+		if d["entityBody"] != "" {
+			ha2 = getMD5(d["method"] + ":" + d["uri"] + ":" + getMD5(d["entityBody"]))
+		}
+	}
+
+	// 'response' value depends on value of "qop" field
+	switch d["qop"] {
+	case "":
+		response = getMD5(
+			fmt.Sprintf("%s:%s:%s",
+				ha1,
+				d["nonce"],
+				ha2,
+			),
+		)
+	case "auth", "auth-int":
+		response = getMD5(
+			fmt.Sprintf("%s:%s:%v:%s:%s:%s",
+				ha1,
+				d["nonce"],
+				nonceCount,
+				cnonce,
+				d["qop"],
+				ha2,
+			),
+		)
+	}
+
+	authorization := fmt.Sprintf(`Digest username="%s", realm="%s", nonce="%s", uri="%s", nc=%v, cnonce="%s", response="%s"`,
+		d["username"], d["realm"], d["nonce"], d["uri"], nonceCount, cnonce, response)
+
+	if d["qop"] != "" {
+		authorization += fmt.Sprintf(`, qop=%s`, d["qop"])
+	}
+
+	if d["opaque"] != "" {
+		authorization += fmt.Sprintf(`, opaque="%s"`, d["opaque"])
+	}
+
+	return authorization
+}

vendor/github.com/studio-b12/gowebdav/doc.go

@@ -0,0 +1,3 @@
+// Package gowebdav is a WebDAV client library with a command line tool
+// included.
+package gowebdav

vendor/github.com/studio-b12/gowebdav/file.go

@@ -0,0 +1,72 @@
+package gowebdav
+
+import (
+	"fmt"
+	"os"
+	"time"
+)
+
+// File is our structure for a given file
+type File struct {
+	path        string
+	name        string
+	contentType string
+	size        int64
+	modified    time.Time
+	etag        string
+	isdir       bool
+}
+
+// Name returns the name of a file
+func (f File) Name() string {
+	return f.name
+}
+
+// ContentType returns the content type of a file
+func (f File) ContentType() string {
+	return f.contentType
+}
+
+// Size returns the size of a file
+func (f File) Size() int64 {
+	return f.size
+}
+
+// Mode will return the mode of a given file
+func (f File) Mode() os.FileMode {
+	// TODO check webdav perms
+	if f.isdir {
+		return 0775 | os.ModeDir
+	}
+
+	return 0664
+}
+
+// ModTime returns the modified time of a file
+func (f File) ModTime() time.Time {
+	return f.modified
+}
+
+// ETag returns the ETag of a file
+func (f File) ETag() string {
+	return f.etag
+}
+
+// IsDir let us see if a given file is a directory or not
+func (f File) IsDir() bool {
+	return f.isdir
+}
+
+// Sys ????
+func (f File) Sys() interface{} {
+	return nil
+}
+
+// String lets us see file information
+func (f File) String() string {
+	if f.isdir {
+		return fmt.Sprintf("Dir : '%s' - '%s'", f.path, f.name)
+	}
+
+	return fmt.Sprintf("File: '%s' SIZE: %d MODIFIED: %s ETAG: %s CTYPE: %s", f.path, f.size, f.modified.String(), f.etag, f.contentType)
+}

vendor/github.com/studio-b12/gowebdav/netrc.go

@@ -0,0 +1,54 @@
+package gowebdav
+
+import (
+	"bufio"
+	"fmt"
+	"net/url"
+	"os"
+	"regexp"
+	"strings"
+)
+
+func parseLine(s string) (login, pass string) {
+	fields := strings.Fields(s)
+	for i, f := range fields {
+		if f == "login" {
+			login = fields[i+1]
+		}
+		if f == "password" {
+			pass = fields[i+1]
+		}
+	}
+	return login, pass
+}
+
+// ReadConfig reads login and password configuration from ~/.netrc
+// machine foo.com login username password 123456
+func ReadConfig(uri, netrc string) (string, string) {
+	u, err := url.Parse(uri)
+	if err != nil {
+		return "", ""
+	}
+
+	file, err := os.Open(netrc)
+	if err != nil {
+		return "", ""
+	}
+	defer file.Close()
+
+	re := fmt.Sprintf(`^.*machine %s.*$`, u.Host)
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		s := scanner.Text()
+
+		matched, err := regexp.MatchString(re, s)
+		if err != nil {
+			return "", ""
+		}
+		if matched {
+			return parseLine(s)
+		}
+	}
+
+	return "", ""
+}

vendor/github.com/studio-b12/gowebdav/requests.go

@@ -0,0 +1,164 @@
+package gowebdav
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"net/http"
+	"path"
+	"strings"
+)
+
+func (c *Client) req(method, path string, body io.Reader, intercept func(*http.Request)) (req *http.Response, err error) {
+	// Tee the body, because if authorization fails we will need to read from it again.
+	var r *http.Request
+	var ba bytes.Buffer
+	bb := io.TeeReader(body, &ba)
+
+	if body == nil {
+		r, err = http.NewRequest(method, PathEscape(Join(c.root, path)), nil)
+	} else {
+		r, err = http.NewRequest(method, PathEscape(Join(c.root, path)), bb)
+	}
+
+	if err != nil {
+		return nil, err
+	}
+
+	c.auth.Authorize(c, method, path)
+
+	for k, vals := range c.headers {
+		for _, v := range vals {
+			r.Header.Add(k, v)
+		}
+	}
+
+	if intercept != nil {
+		intercept(r)
+	}
+
+	rs, err := c.c.Do(r)
+	if err != nil {
+		return nil, err
+	}
+
+	if rs.StatusCode == 401 && c.auth.Type() == "NoAuth" {
+		if strings.Index(rs.Header.Get("Www-Authenticate"), "Digest") > -1 {
+			c.auth = &DigestAuth{c.auth.User(), c.auth.Pass(), digestParts(rs)}
+		} else if strings.Index(rs.Header.Get("Www-Authenticate"), "Basic") > -1 {
+			c.auth = &BasicAuth{c.auth.User(), c.auth.Pass()}
+		} else {
+			return rs, newPathError("Authorize", c.root, rs.StatusCode)
+		}
+
+		if body == nil {
+			return c.req(method, path, nil, intercept)
+		} else {
+			return c.req(method, path, &ba, intercept)
+		}
+
+	} else if rs.StatusCode == 401 {
+		return rs, newPathError("Authorize", c.root, rs.StatusCode)
+	}
+
+	return rs, err
+}
+
+func (c *Client) mkcol(path string) int {
+	rs, err := c.req("MKCOL", path, nil, nil)
+	if err != nil {
+		return 400
+	}
+	defer rs.Body.Close()
+
+	if rs.StatusCode == 201 || rs.StatusCode == 405 {
+		return 201
+	}
+
+	return rs.StatusCode
+}
+
+func (c *Client) options(path string) (*http.Response, error) {
+	return c.req("OPTIONS", path, nil, func(rq *http.Request) {
+		rq.Header.Add("Depth", "0")
+	})
+}
+
+func (c *Client) propfind(path string, self bool, body string, resp interface{}, parse func(resp interface{}) error) error {
+	rs, err := c.req("PROPFIND", path, strings.NewReader(body), func(rq *http.Request) {
+		if self {
+			rq.Header.Add("Depth", "0")
+		} else {
+			rq.Header.Add("Depth", "1")
+		}
+		rq.Header.Add("Content-Type", "application/xml;charset=UTF-8")
+		rq.Header.Add("Accept", "application/xml,text/xml")
+		rq.Header.Add("Accept-Charset", "utf-8")
+		// TODO add support for 'gzip,deflate;q=0.8,q=0.7'
+		rq.Header.Add("Accept-Encoding", "")
+	})
+	if err != nil {
+		return err
+	}
+	defer rs.Body.Close()
+
+	if rs.StatusCode != 207 {
+		return fmt.Errorf("%s - %s %s", rs.Status, "PROPFIND", path)
+	}
+
+	return parseXML(rs.Body, resp, parse)
+}
+
+func (c *Client) doCopyMove(method string, oldpath string, newpath string, overwrite bool) (int, io.ReadCloser) {
+	rs, err := c.req(method, oldpath, nil, func(rq *http.Request) {
+		rq.Header.Add("Destination", Join(c.root, newpath))
+		if overwrite {
+			rq.Header.Add("Overwrite", "T")
+		} else {
+			rq.Header.Add("Overwrite", "F")
+		}
+	})
+	if err != nil {
+		return 400, nil
+	}
+	return rs.StatusCode, rs.Body
+}
+
+func (c *Client) copymove(method string, oldpath string, newpath string, overwrite bool) error {
+	s, data := c.doCopyMove(method, oldpath, newpath, overwrite)
+	defer data.Close()
+
+	switch s {
+	case 201, 204:
+		return nil
+
+	case 207:
+		// TODO handle multistat errors, worst case ...
+		log(fmt.Sprintf(" TODO handle %s - %s multistatus result %s", method, oldpath, String(data)))
+
+	case 409:
+		err := c.createParentCollection(newpath)
+		if err != nil {
+			return err
+		}
+
+		return c.copymove(method, oldpath, newpath, overwrite)
+	}
+
+	return newPathError(method, oldpath, s)
+}
+
+func (c *Client) put(path string, stream io.Reader) int {
+	rs, err := c.req("PUT", path, stream, nil)
+	if err != nil {
+		return 400
+	}
+	defer rs.Body.Close()
+
+	return rs.StatusCode
+}
+
+func (c *Client) createParentCollection(itemPath string) (err error) {
+	parentPath := path.Dir(itemPath)
+	return c.MkdirAll(parentPath, 0755)
+}

vendor/github.com/studio-b12/gowebdav/utils.go

@@ -0,0 +1,109 @@
+package gowebdav
+
+import (
+	"bytes"
+	"encoding/xml"
+	"fmt"
+	"io"
+	"net/url"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+)
+
+func log(msg interface{}) {
+	fmt.Println(msg)
+}
+
+func newPathError(op string, path string, statusCode int) error {
+	return &os.PathError{
+		Op:   op,
+		Path: path,
+		Err:  fmt.Errorf("%d", statusCode),
+	}
+}
+
+func newPathErrorErr(op string, path string, err error) error {
+	return &os.PathError{
+		Op:   op,
+		Path: path,
+		Err:  err,
+	}
+}
+
+// PathEscape escapes all segemnts of a given path
+func PathEscape(path string) string {
+	s := strings.Split(path, "/")
+	for i, e := range s {
+		s[i] = url.PathEscape(e)
+	}
+	return strings.Join(s, "/")
+}
+
+// FixSlash appends a trailing / to our string
+func FixSlash(s string) string {
+	if !strings.HasSuffix(s, "/") {
+		s += "/"
+	}
+	return s
+}
+
+// FixSlashes appends and prepends a / if they are missing
+func FixSlashes(s string) string {
+	if s[0] != '/' {
+		s = "/" + s
+	}
+	return FixSlash(s)
+}
+
+// Join joins two paths
+func Join(path0 string, path1 string) string {
+	return strings.TrimSuffix(path0, "/") + "/" + strings.TrimPrefix(path1, "/")
+}
+
+// String pulls a string out of our io.Reader
+func String(r io.Reader) string {
+	buf := new(bytes.Buffer)
+	// TODO - make String return an error as well
+	_, _ = buf.ReadFrom(r)
+	return buf.String()
+}
+
+func parseUint(s *string) uint {
+	if n, e := strconv.ParseUint(*s, 10, 32); e == nil {
+		return uint(n)
+	}
+	return 0
+}
+
+func parseInt64(s *string) int64 {
+	if n, e := strconv.ParseInt(*s, 10, 64); e == nil {
+		return n
+	}
+	return 0
+}
+
+func parseModified(s *string) time.Time {
+	if t, e := time.Parse(time.RFC1123, *s); e == nil {
+		return t
+	}
+	return time.Unix(0, 0)
+}
+
+func parseXML(data io.Reader, resp interface{}, parse func(resp interface{}) error) error {
+	decoder := xml.NewDecoder(data)
+	for t, _ := decoder.Token(); t != nil; t, _ = decoder.Token() {
+		switch se := t.(type) {
+		case xml.StartElement:
+			if se.Name.Local == "response" {
+				if e := decoder.DecodeElement(resp, &se); e == nil {
+					if err := parse(resp); err != nil {
+						return err
+					}
+				}
+			}
+		}
+	}
+	return nil
+}

vendor/modules.txt

@@ -19,6 +19,8 @@ github.com/stretchr/objx
 # github.com/stretchr/testify v1.2.2
 github.com/stretchr/testify/mock
 github.com/stretchr/testify/assert
+# github.com/studio-b12/gowebdav v0.0.0-20190103184047-38f79aeaf1ac
+github.com/studio-b12/gowebdav
 # golang.org/x/net v0.0.0-20181129055619-fae4c4e3ad76
 golang.org/x/net/publicsuffix
 # golang.org/x/sys v0.0.0-20190422165155-953cdadca894