Re-add setting requestBuf after seeking

added ReadStreamRange() method to efficiently read a range of data

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,27 @@
+---
+name: Bug report
+about: Create a report to help us improve
+
+---
+
+Hello Collaborators,
+
+**Describe the bug**
+A short description of what you think the bug is.
+
+**Software**
+ - OS:
+ - Golang:
+ - Version:
+
+**To Reproduce**
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected**
+A short description of what you expected to happen.
+
+**Additional context**
+Add any other context about the problem here.

.github/workflows/artifacts.yml

@@ -0,0 +1,46 @@
+name: Build Artifacts
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - master
+    paths-ignore:
+      - "**.md"
+
+jobs:
+  build_artifacts:
+    name: Build Artifcats
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        goos:
+          - linux
+          - windows
+          - darwin
+        goarch:
+          - amd64
+          - arm64
+    steps:
+      - name: Set up Go
+        uses: actions/setup-go@v1
+        with:
+          go-version: "^1.17"
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v2
+      - name: Get dependencies
+        run: go get ./...
+      - name: Build Client (${{ matrix.goos }}-${{ matrix.goarch }})
+        env:
+          GOOS: ${{ matrix.goos }}
+          GOARCH: ${{ matrix.goarch }}
+        run: go build -v -o ./bin/gowebdav-${{ matrix.goos }}-${{ matrix.goarch }} ./cmd/gowebdav/main.go
+      - name: Rename Windows Binary
+        if: ${{ matrix.goos == 'windows' }}
+        env:
+          FNAME: ./bin/gowebdav-${{ matrix.goos }}-${{ matrix.goarch }}
+        run: mv ${{ env.FNAME }} ${{ env.FNAME }}.exe
+      - name: Upload Artifcats
+        uses: actions/upload-artifact@v2
+        with:
+          name: ${{ matrix.goos }}-${{ matrix.goarch }}
+          path: ./bin/

.github/workflows/tests.yml

@@ -0,0 +1,30 @@
+name: Unit Tests
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - "*"
+    paths-ignore:
+      - "**.md"
+  pull_request:
+
+jobs:
+  unit_tests:
+    name: Unit Tests
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        goversion:
+          - "1.17"
+          - "1.16"
+    steps:
+      - name: Set up Go
+        uses: actions/setup-go@v1
+        with:
+          go-version: ${{ matrix.goversion }}
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v2
+      - name: Get dependencies
+        run: go get ./...
+      - name: Run Unit Tests
+        run: go test -v -cover -race ./...

.gitignore

@@ -1,4 +1,21 @@
+# 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
+
+.vscode/

.travis.yml

@@ -2,3 +2,9 @@ language: go
 
 go:
   - "1.x"
+
+install:
+  - go get ./...
+
+script:
+  - go test -v --short ./...

README.md

@@ -4,84 +4,147 @@
 [![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 and command line tool.
+A golang WebDAV client library.
 
-## Install command line tool
-
-```sh
-go get -u github.com/studio-b12/gowebdav/cmd/gowebdav
-```
+## 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
 
-```sh
-$ gowebdav --help
-Usage of gowebdav
-  -X string
-        Method:
-                LS <PATH>
-                STAT <PATH>
+First of all you should create `Client` instance using `NewClient()` function:
 
-                MKDIR <PATH>
-                MKDIRALL <PATH>
+```go
+root := "https://webdav.mydomain.me"
+user := "user"
+password := "password"
 
-                GET <PATH> [<FILE>]
-                PUT <PATH> [<FILE>]
-
-                MV <OLD> <NEW>
-                CP <OLD> <NEW>
-
-                DEL <PATH>
-
-  -netrc-file string
-        read login from netrc file (default "~/.netrc")
-  -pw string
-        Password [ENV.PASSWORD]
-  -root string
-        WebDAV Endpoint [ENV.ROOT]
-  -user string
-        User [ENV.USER] (default "$USER")
+c := gowebdav.NewClient(root, user, password)
 ```
 
-*gowebdav wrapper script*
+After you can use this `Client` to perform actions, described below.
 
-Create a wrapper script for example `$EDITOR ./dav && chmod a+x ./dav` for your
-server and use [pass](https://www.passwordstore.org/ "the standard unix password manager")
-or similar tools to retrieve the password.
+**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!
 
-```sh
-#!/bin/sh
-
-ROOT="https://my.dav.server/" \
-USER="foo" \
-PASSWORD="$(pass dav/foo@my.dav.server)" \
-gowebdav $@
+### 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)
 ```
 
-*Examples*
-
-Using the `dav` wrapper:
-
-```sh
-$ ./dav -X LS /
-
-$ echo hi dav! > hello && ./dav -X PUT /hello
-
-$ ./dav -X STAT /hello
-
-$ ./dav -X PUT /hello_dav hello
-
-$ ./dav -X GET /hello_dav
-
-$ ./dav -X GET /hello_dav hello.txt
+### Get files list
+```go
+files, _ := c.ReadDir("folder/subfolder")
+for _, file := range files {
+    //notice that [file] has os.FileInfo type
+    fmt.Println(file.Name())
+}
 ```
 
-## LINKS
+### Download file to byte array
+```go
+webdavFilePath := "folder/subfolder/file.txt"
+localFilePath := "/tmp/webdav/file.txt"
 
-* [RFC 2518 - HTTP Extensions for Distributed Authoring -- WEBDAV](http://www.faqs.org/rfcs/rfc2518.html "RFC 2518 - HTTP Extensions for Distributed Authoring -- WEBDAV")
+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.
 ## API
 
 `import "github.com/studio-b12/gowebdav"`
@@ -104,7 +167,7 @@ included.
 * [func String(r io.Reader) string](#String)
 * [type Authenticator](#Authenticator)
 * [type BasicAuth](#BasicAuth)
-  * [func (b *BasicAuth) Authorize(c *Client, method string, path string)](#BasicAuth.Authorize)
+  * [func (b *BasicAuth) Authorize(req *http.Request, method string, path string)](#BasicAuth.Authorize)
   * [func (b *BasicAuth) Pass() string](#BasicAuth.Pass)
   * [func (b *BasicAuth) Type() string](#BasicAuth.Type)
   * [func (b *BasicAuth) User() string](#BasicAuth.User)
@@ -121,13 +184,14 @@ included.
   * [func (c *Client) RemoveAll(path string) error](#Client.RemoveAll)
   * [func (c *Client) Rename(oldpath, newpath string, overwrite bool) error](#Client.Rename)
   * [func (c *Client) SetHeader(key, value string)](#Client.SetHeader)
+  * [func (c *Client) SetInterceptor(interceptor func(method string, rq *http.Request))](#Client.SetInterceptor)
   * [func (c *Client) SetTimeout(timeout time.Duration)](#Client.SetTimeout)
   * [func (c *Client) SetTransport(transport http.RoundTripper)](#Client.SetTransport)
   * [func (c *Client) Stat(path string) (os.FileInfo, error)](#Client.Stat)
   * [func (c *Client) Write(path string, data []byte, _ os.FileMode) error](#Client.Write)
   * [func (c *Client) WriteStream(path string, stream io.Reader, _ os.FileMode) error](#Client.WriteStream)
 * [type DigestAuth](#DigestAuth)
-  * [func (d *DigestAuth) Authorize(c *Client, method string, path string)](#DigestAuth.Authorize)
+  * [func (d *DigestAuth) Authorize(req *http.Request, method string, path string)](#DigestAuth.Authorize)
   * [func (d *DigestAuth) Pass() string](#DigestAuth.Pass)
   * [func (d *DigestAuth) Type() string](#DigestAuth.Type)
   * [func (d *DigestAuth) User() string](#DigestAuth.User)
@@ -138,11 +202,12 @@ included.
   * [func (f File) ModTime() time.Time](#File.ModTime)
   * [func (f File) Mode() os.FileMode](#File.Mode)
   * [func (f File) Name() string](#File.Name)
+  * [func (f File) Path() string](#File.Path)
   * [func (f File) Size() int64](#File.Size)
   * [func (f File) String() string](#File.String)
   * [func (f File) Sys() interface{}](#File.Sys)
 * [type NoAuth](#NoAuth)
-  * [func (n *NoAuth) Authorize(c *Client, method string, path string)](#NoAuth.Authorize)
+  * [func (n *NoAuth) Authorize(req *http.Request, method string, path string)](#NoAuth.Authorize)
   * [func (n *NoAuth) Pass() string](#NoAuth.Pass)
   * [func (n *NoAuth) Type() string](#NoAuth.Type)
   * [func (n *NoAuth) User() string](#NoAuth.User)
@@ -190,18 +255,18 @@ func String(r io.Reader) string
 ```
 String pulls a string out of our io.Reader
 
-### <a name="Authenticator">type</a> [Authenticator](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=285:398#L24)
+### <a name="Authenticator">type</a> [Authenticator](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=381:500#L28)
 ``` go
 type Authenticator interface {
     Type() string
     User() string
     Pass() string
-    Authorize(*Client, string, string)
+    Authorize(*http.Request, string, string)
 }
 ```
 Authenticator stub
 
-### <a name="BasicAuth">type</a> [BasicAuth](https://github.com/studio-b12/gowebdav/blob/master/basicAuth.go?s=94:145#L8)
+### <a name="BasicAuth">type</a> [BasicAuth](https://github.com/studio-b12/gowebdav/blob/master/basicAuth.go?s=106:157#L9)
 ``` go
 type BasicAuth struct {
     // contains filtered or unexported fields
@@ -209,31 +274,31 @@ type BasicAuth struct {
 ```
 BasicAuth structure holds our credentials
 
-#### <a name="BasicAuth.Authorize">func</a> (\*BasicAuth) [Authorize](https://github.com/studio-b12/gowebdav/blob/master/basicAuth.go?s=461:529#L29)
+#### <a name="BasicAuth.Authorize">func</a> (\*BasicAuth) [Authorize](https://github.com/studio-b12/gowebdav/blob/master/basicAuth.go?s=473:549#L30)
 ``` go
-func (b *BasicAuth) Authorize(c *Client, method string, path string)
+func (b *BasicAuth) Authorize(req *http.Request, method string, path string)
 ```
 Authorize the current request
 
-#### <a name="BasicAuth.Pass">func</a> (\*BasicAuth) [Pass](https://github.com/studio-b12/gowebdav/blob/master/basicAuth.go?s=376:409#L24)
+#### <a name="BasicAuth.Pass">func</a> (\*BasicAuth) [Pass](https://github.com/studio-b12/gowebdav/blob/master/basicAuth.go?s=388:421#L25)
 ``` go
 func (b *BasicAuth) Pass() string
 ```
 Pass holds the BasicAuth password
 
-#### <a name="BasicAuth.Type">func</a> (\*BasicAuth) [Type](https://github.com/studio-b12/gowebdav/blob/master/basicAuth.go?s=189:222#L14)
+#### <a name="BasicAuth.Type">func</a> (\*BasicAuth) [Type](https://github.com/studio-b12/gowebdav/blob/master/basicAuth.go?s=201:234#L15)
 ``` go
 func (b *BasicAuth) Type() string
 ```
 Type identifies the BasicAuthenticator
 
-#### <a name="BasicAuth.User">func</a> (\*BasicAuth) [User](https://github.com/studio-b12/gowebdav/blob/master/basicAuth.go?s=285:318#L19)
+#### <a name="BasicAuth.User">func</a> (\*BasicAuth) [User](https://github.com/studio-b12/gowebdav/blob/master/basicAuth.go?s=297:330#L20)
 ``` go
 func (b *BasicAuth) User() string
 ```
 User holds the BasicAuth username
 
-### <a name="Client">type</a> [Client](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=157:261#L16)
+### <a name="Client">type</a> [Client](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=165:357#L17)
 ``` go
 type Client struct {
     // contains filtered or unexported fields
@@ -241,103 +306,109 @@ type Client struct {
 ```
 Client defines our structure
 
-#### <a name="NewClient">func</a> [NewClient](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=902:946#L57)
+#### <a name="NewClient">func</a> [NewClient](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=1012:1056#L61)
 ``` go
 func NewClient(uri, user, pw string) *Client
 ```
 NewClient creates a new instance of client
 
-#### <a name="Client.Connect">func</a> (\*Client) [Connect](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=1516:1548#L77)
+#### <a name="Client.Connect">func</a> (\*Client) [Connect](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=1836:1868#L86)
 ``` go
 func (c *Client) Connect() error
 ```
 Connect connects to our dav server
 
-#### <a name="Client.Copy">func</a> (\*Client) [Copy](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=6960:7028#L314)
+#### <a name="Client.Copy">func</a> (\*Client) [Copy](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=6695:6763#L312)
 ``` go
 func (c *Client) Copy(oldpath, newpath string, overwrite bool) error
 ```
 Copy copies a file from A to B
 
-#### <a name="Client.Mkdir">func</a> (\*Client) [Mkdir](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=6051:6107#L273)
+#### <a name="Client.Mkdir">func</a> (\*Client) [Mkdir](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=5786:5842#L271)
 ``` go
 func (c *Client) Mkdir(path string, _ os.FileMode) error
 ```
 Mkdir makes a directory
 
-#### <a name="Client.MkdirAll">func</a> (\*Client) [MkdirAll](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=6286:6345#L284)
+#### <a name="Client.MkdirAll">func</a> (\*Client) [MkdirAll](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=6021:6080#L282)
 ``` go
 func (c *Client) MkdirAll(path string, _ os.FileMode) error
 ```
 MkdirAll like mkdir -p, but for webdav
 
-#### <a name="Client.Read">func</a> (\*Client) [Read](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=7134:7184#L319)
+#### <a name="Client.Read">func</a> (\*Client) [Read](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=6869:6919#L317)
 ``` go
 func (c *Client) Read(path string) ([]byte, error)
 ```
 Read reads the contents of a remote file
 
-#### <a name="Client.ReadDir">func</a> (\*Client) [ReadDir](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=3126:3186#L131)
+#### <a name="Client.ReadDir">func</a> (\*Client) [ReadDir](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=2862:2922#L129)
 ``` go
 func (c *Client) ReadDir(path string) ([]os.FileInfo, error)
 ```
 ReadDir reads the contents of a remote directory
 
-#### <a name="Client.ReadStream">func</a> (\*Client) [ReadStream](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=7495:7558#L337)
+#### <a name="Client.ReadStream">func</a> (\*Client) [ReadStream](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=7230:7293#L335)
 ``` go
 func (c *Client) ReadStream(path string) (io.ReadCloser, error)
 ```
 ReadStream reads the stream for a given path
 
-#### <a name="Client.Remove">func</a> (\*Client) [Remove](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=5557:5599#L250)
+#### <a name="Client.Remove">func</a> (\*Client) [Remove](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=5292:5334#L248)
 ``` go
 func (c *Client) Remove(path string) error
 ```
 Remove removes a remote file
 
-#### <a name="Client.RemoveAll">func</a> (\*Client) [RemoveAll](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=5665:5710#L255)
+#### <a name="Client.RemoveAll">func</a> (\*Client) [RemoveAll](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=5400:5445#L253)
 ``` go
 func (c *Client) RemoveAll(path string) error
 ```
 RemoveAll removes remote files
 
-#### <a name="Client.Rename">func</a> (\*Client) [Rename](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=6794:6864#L309)
+#### <a name="Client.Rename">func</a> (\*Client) [Rename](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=6529:6599#L307)
 ``` go
 func (c *Client) Rename(oldpath, newpath string, overwrite bool) error
 ```
 Rename moves a file from A to B
 
-#### <a name="Client.SetHeader">func</a> (\*Client) [SetHeader](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=1099:1144#L62)
+#### <a name="Client.SetHeader">func</a> (\*Client) [SetHeader](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=1228:1273#L66)
 ``` go
 func (c *Client) SetHeader(key, value string)
 ```
 SetHeader lets us set arbitrary headers for a given client
 
-#### <a name="Client.SetTimeout">func</a> (\*Client) [SetTimeout](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=1244:1294#L67)
+#### <a name="Client.SetInterceptor">func</a> (\*Client) [SetInterceptor](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=1380:1462#L71)
+``` go
+func (c *Client) SetInterceptor(interceptor func(method string, rq *http.Request))
+```
+SetInterceptor lets us set an arbitrary interceptor for a given client
+
+#### <a name="Client.SetTimeout">func</a> (\*Client) [SetTimeout](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=1564:1614#L76)
 ``` go
 func (c *Client) SetTimeout(timeout time.Duration)
 ```
 SetTimeout exposes the ability to set a time limit for requests
 
-#### <a name="Client.SetTransport">func</a> (\*Client) [SetTransport](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=1387:1445#L72)
+#### <a name="Client.SetTransport">func</a> (\*Client) [SetTransport](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=1707:1765#L81)
 ``` go
 func (c *Client) SetTransport(transport http.RoundTripper)
 ```
 SetTransport exposes the ability to define custom transports
 
-#### <a name="Client.Stat">func</a> (\*Client) [Stat](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=4513:4568#L198)
+#### <a name="Client.Stat">func</a> (\*Client) [Stat](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=4248:4303#L196)
 ``` go
 func (c *Client) Stat(path string) (os.FileInfo, error)
 ```
 Stat returns the file stats for a specified path
 
-#### <a name="Client.Write">func</a> (\*Client) [Write](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=7849:7918#L352)
+#### <a name="Client.Write">func</a> (\*Client) [Write](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=7584:7653#L350)
 ``` go
 func (c *Client) Write(path string, data []byte, _ os.FileMode) error
 ```
 Write writes data to a given path
 
-#### <a name="Client.WriteStream">func</a> (\*Client) [WriteStream](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=8320:8400#L374)
+#### <a name="Client.WriteStream">func</a> (\*Client) [WriteStream](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=8009:8089#L373)
 ``` go
 func (c *Client) WriteStream(path string, stream io.Reader, _ os.FileMode) error
 ```
@@ -351,9 +422,9 @@ type DigestAuth struct {
 ```
 DigestAuth structure holds our credentials
 
-#### <a name="DigestAuth.Authorize">func</a> (\*DigestAuth) [Authorize](https://github.com/studio-b12/gowebdav/blob/master/digestAuth.go?s=577:646#L36)
+#### <a name="DigestAuth.Authorize">func</a> (\*DigestAuth) [Authorize](https://github.com/studio-b12/gowebdav/blob/master/digestAuth.go?s=577:654#L36)
 ``` go
-func (d *DigestAuth) Authorize(c *Client, method string, path string)
+func (d *DigestAuth) Authorize(req *http.Request, method string, path string)
 ```
 Authorize the current request
 
@@ -383,61 +454,67 @@ type File struct {
 ```
 File is our structure for a given file
 
-#### <a name="File.ContentType">func</a> (File) [ContentType](https://github.com/studio-b12/gowebdav/blob/master/file.go?s=388:422#L26)
+#### <a name="File.ContentType">func</a> (File) [ContentType](https://github.com/studio-b12/gowebdav/blob/master/file.go?s=476:510#L31)
 ``` go
 func (f File) ContentType() string
 ```
 ContentType returns the content type of a file
 
-#### <a name="File.ETag">func</a> (File) [ETag](https://github.com/studio-b12/gowebdav/blob/master/file.go?s=841:868#L51)
+#### <a name="File.ETag">func</a> (File) [ETag](https://github.com/studio-b12/gowebdav/blob/master/file.go?s=929:956#L56)
 ``` go
 func (f File) ETag() string
 ```
 ETag returns the ETag of a file
 
-#### <a name="File.IsDir">func</a> (File) [IsDir](https://github.com/studio-b12/gowebdav/blob/master/file.go?s=947:973#L56)
+#### <a name="File.IsDir">func</a> (File) [IsDir](https://github.com/studio-b12/gowebdav/blob/master/file.go?s=1035:1061#L61)
 ``` go
 func (f File) IsDir() bool
 ```
 IsDir let us see if a given file is a directory or not
 
-#### <a name="File.ModTime">func</a> (File) [ModTime](https://github.com/studio-b12/gowebdav/blob/master/file.go?s=748:781#L46)
+#### <a name="File.ModTime">func</a> (File) [ModTime](https://github.com/studio-b12/gowebdav/blob/master/file.go?s=836:869#L51)
 ``` go
 func (f File) ModTime() time.Time
 ```
 ModTime returns the modified time of a file
 
-#### <a name="File.Mode">func</a> (File) [Mode](https://github.com/studio-b12/gowebdav/blob/master/file.go?s=577:609#L36)
+#### <a name="File.Mode">func</a> (File) [Mode](https://github.com/studio-b12/gowebdav/blob/master/file.go?s=665:697#L41)
 ``` go
 func (f File) Mode() os.FileMode
 ```
 Mode will return the mode of a given file
 
-#### <a name="File.Name">func</a> (File) [Name](https://github.com/studio-b12/gowebdav/blob/master/file.go?s=290:317#L21)
+#### <a name="File.Name">func</a> (File) [Name](https://github.com/studio-b12/gowebdav/blob/master/file.go?s=378:405#L26)
 ``` go
 func (f File) Name() string
 ```
 Name returns the name of a file
 
-#### <a name="File.Size">func</a> (File) [Size](https://github.com/studio-b12/gowebdav/blob/master/file.go?s=485:511#L31)
+#### <a name="File.Path">func</a> (File) [Path](https://github.com/studio-b12/gowebdav/blob/master/file.go?s=295:322#L21)
+``` go
+func (f File) Path() string
+```
+Path returns the full path of a file
+
+#### <a name="File.Size">func</a> (File) [Size](https://github.com/studio-b12/gowebdav/blob/master/file.go?s=573:599#L36)
 ``` go
 func (f File) Size() int64
 ```
 Size returns the size of a file
 
-#### <a name="File.String">func</a> (File) [String](https://github.com/studio-b12/gowebdav/blob/master/file.go?s=1095:1124#L66)
+#### <a name="File.String">func</a> (File) [String](https://github.com/studio-b12/gowebdav/blob/master/file.go?s=1183:1212#L71)
 ``` go
 func (f File) String() string
 ```
 String lets us see file information
 
-#### <a name="File.Sys">func</a> (File) [Sys](https://github.com/studio-b12/gowebdav/blob/master/file.go?s=1007:1038#L61)
+#### <a name="File.Sys">func</a> (File) [Sys](https://github.com/studio-b12/gowebdav/blob/master/file.go?s=1095:1126#L66)
 ``` go
 func (f File) Sys() interface{}
 ```
 Sys ????
 
-### <a name="NoAuth">type</a> [NoAuth](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=442:490#L32)
+### <a name="NoAuth">type</a> [NoAuth](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=544:592#L36)
 ``` go
 type NoAuth struct {
     // contains filtered or unexported fields
@@ -445,25 +522,25 @@ type NoAuth struct {
 ```
 NoAuth structure holds our credentials
 
-#### <a name="NoAuth.Authorize">func</a> (\*NoAuth) [Authorize](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=785:850#L53)
+#### <a name="NoAuth.Authorize">func</a> (\*NoAuth) [Authorize](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=887:960#L57)
 ``` go
-func (n *NoAuth) Authorize(c *Client, method string, path string)
+func (n *NoAuth) Authorize(req *http.Request, method string, path string)
 ```
 Authorize the current request
 
-#### <a name="NoAuth.Pass">func</a> (\*NoAuth) [Pass](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=703:733#L48)
+#### <a name="NoAuth.Pass">func</a> (\*NoAuth) [Pass](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=805:835#L52)
 ``` go
 func (n *NoAuth) Pass() string
 ```
 Pass returns the current password
 
-#### <a name="NoAuth.Type">func</a> (\*NoAuth) [Type](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=529:559#L38)
+#### <a name="NoAuth.Type">func</a> (\*NoAuth) [Type](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=631:661#L42)
 ``` go
 func (n *NoAuth) Type() string
 ```
 Type identifies the authenticator
 
-#### <a name="NoAuth.User">func</a> (\*NoAuth) [User](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=615:645#L43)
+#### <a name="NoAuth.User">func</a> (\*NoAuth) [User](https://github.com/studio-b12/gowebdav/blob/master/client.go?s=717:747#L47)
 ``` go
 func (n *NoAuth) User() string
 ```

basicAuth.go

@@ -2,6 +2,7 @@ package gowebdav
 
 import (
 	"encoding/base64"
+	"net/http"
 )
 
 // BasicAuth structure holds our credentials
@@ -26,8 +27,8 @@ func (b *BasicAuth) Pass() string {
 }
 
 // Authorize the current request
-func (b *BasicAuth) Authorize(c *Client, method string, path string) {
+func (b *BasicAuth) Authorize(req *http.Request, method string, path string) {
 	a := b.user + ":" + b.pw
 	auth := "Basic " + base64.StdEncoding.EncodeToString([]byte(a))
-	c.headers.Set("Authorization", auth)
+	req.Header.Set("Authorization", auth)
 }

client.go

@@ -3,12 +3,14 @@ package gowebdav
 import (
 	"bytes"
 	"encoding/xml"
+	"fmt"
 	"io"
 	"net/http"
 	"net/url"
 	"os"
 	pathpkg "path"
 	"strings"
+	"sync"
 	"time"
 )
 
@@ -16,7 +18,10 @@ import (
 type Client struct {
 	root        string
 	headers     http.Header
+	interceptor func(method string, rq *http.Request)
 	c           *http.Client
+
+	authMutex sync.Mutex
 	auth      Authenticator
 }
 
@@ -25,7 +30,7 @@ type Authenticator interface {
 	Type() string
 	User() string
 	Pass() string
-	Authorize(*Client, string, string)
+	Authorize(*http.Request, string, string)
 }
 
 // NoAuth structure holds our credentials
@@ -50,12 +55,12 @@ func (n *NoAuth) Pass() string {
 }
 
 // Authorize the current request
-func (n *NoAuth) Authorize(c *Client, method string, path string) {
+func (n *NoAuth) Authorize(req *http.Request, 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}}
+	return &Client{FixSlash(uri), make(http.Header), nil, &http.Client{}, sync.Mutex{}, &NoAuth{user, pw}}
 }
 
 // SetHeader lets us set arbitrary headers for a given client
@@ -63,6 +68,11 @@ func (c *Client) SetHeader(key, value string) {
 	c.headers.Add(key, value)
 }
 
+// SetInterceptor lets us set an arbitrary interceptor for a given client
+func (c *Client) SetInterceptor(interceptor func(method string, rq *http.Request)) {
+	c.interceptor = interceptor
+}
+
 // SetTimeout exposes the ability to set a time limit for requests
 func (c *Client) SetTimeout(timeout time.Duration) {
 	c.c.Timeout = timeout
@@ -85,18 +95,7 @@ func (c *Client) Connect() error {
 		return 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 newPathError("Authorize", c.root, rs.StatusCode)
-		}
-		return c.Connect()
-	} else if rs.StatusCode == 401 {
-		return newPathError("Authorize", c.root, rs.StatusCode)
-	} else if rs.StatusCode != 200 || (rs.Header.Get("Dav") == "" && rs.Header.Get("DAV") == "") {
+	if rs.StatusCode != 200 {
 		return newPathError("Connect", c.root, rs.StatusCode)
 	}
 
@@ -146,7 +145,7 @@ func (c *Client) ReadDir(path string) ([]os.FileInfo, error) {
 
 		if p := getProps(r, "200"); p != nil {
 			f := new(File)
-			if ps, err := url.QueryUnescape(r.Href); err == nil {
+			if ps, err := url.PathUnescape(r.Href); err == nil {
 				f.name = pathpkg.Base(ps)
 			} else {
 				f.name = p.Name
@@ -348,6 +347,43 @@ func (c *Client) ReadStream(path string) (io.ReadCloser, error) {
 	return nil, newPathError("ReadStream", path, rs.StatusCode)
 }
 
+// ReadStreamRange reads the stream representing a subset of bytes for a given path,
+// utilizing HTTP Range Requests if the server supports it.
+// The range is expressed as offset from the start of the file and length, for example
+// offset=10, length=10 will return bytes 10 through 19.
+//
+// If the server does not support partial content requests and returns full content instead,
+// this function will emulate the behavior by skipping `offset` bytes and limiting the result
+// to `length`.
+func (c *Client) ReadStreamRange(path string, offset, length int64) (io.ReadCloser, error) {
+	rs, err := c.req("GET", path, nil, func(r *http.Request) {
+		r.Header.Add("Range", fmt.Sprintf("bytes=%v-%v", offset, offset+length-1))
+	})
+	if err != nil {
+		return nil, newPathErrorErr("ReadStreamRange", path, err)
+	}
+
+	if rs.StatusCode == http.StatusPartialContent {
+		// server supported partial content, return as-is.
+		return rs.Body, nil
+	}
+
+	// server returned success, but did not support partial content, so we have the whole
+	// stream in rs.Body
+	if rs.StatusCode == 200 {
+		// discard first 'offset' bytes.
+		if _, err := io.Copy(io.Discard, io.LimitReader(rs.Body, offset)); err != nil {
+			return nil, newPathErrorErr("ReadStreamRange", path, err)
+		}
+
+		// return a io.ReadCloser that is limited to `length` bytes.
+		return &limitedReadCloser{rs.Body, int(length)}, 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))
@@ -357,23 +393,30 @@ func (c *Client) Write(path string, data []byte, _ os.FileMode) error {
 		return nil
 
 	case 409:
-		if i := strings.LastIndex(path, "/"); i > -1 {
-			if err := c.MkdirAll(path[0:i+1], 0755); err == nil {
+		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 {
-	// TODO check if parent collection exists
+
+	err := c.createParentCollection(path)
+	if err != nil {
+		return err
+	}
+
 	s := c.put(path, stream)
+
 	switch s {
 	case 200, 201, 204:
 		return nil

cmd/gowebdav/README.md

@@ -0,0 +1,103 @@
+# Description
+Command line tool for [gowebdav](https://github.com/studio-b12/gowebdav) library.
+
+# Prerequisites
+## Software
+* **OS**: all, which are supported by `Golang`
+* **Golang**: version 1.x
+* **Git**: version 2.14.2 at higher (required to install via `go get`)
+
+# Install
+```sh
+go get -u github.com/studio-b12/gowebdav/cmd/gowebdav
+```
+
+# Usage
+It is recommended to set following environment variables to improve your experience with this tool:
+* `ROOT` is an URL of target WebDAV server (e.g. `https://webdav.mydomain.me/user_root_folder`)
+* `USER` is a login to connect to specified server (e.g. `user`)
+* `PASSWORD` is a password to connect to specified server (e.g. `p@s$w0rD`)
+
+In following examples we suppose that:
+* environment variable `ROOT` is set to `https://webdav.mydomain.me/ufolder`
+* environment variable `USER` is set to `user`
+* environment variable `PASSWORD` is set `p@s$w0rD`
+* folder `/ufolder/temp` exists on the server
+* file `/ufolder/temp/file.txt` exists on the server
+* file `/ufolder/temp/document.rtf` exists on the server
+* file `/tmp/webdav/to_upload.txt` exists on the local machine
+* folder `/tmp/webdav/` is used to download files from the server
+
+## Examples
+
+#### Get content of specified folder
+```sh
+gowebdav -X LS temp
+```
+
+#### Get info about file/folder
+```sh
+gowebdav -X STAT temp
+gowebdav -X STAT temp/file.txt
+```
+
+#### Create folder on the remote server
+```sh
+gowebdav -X MKDIR temp2
+gowebdav -X MKDIRALL all/folders/which-you-want/to_create
+```
+
+#### Download file
+```sh
+gowebdav -X GET temp/document.rtf /tmp/webdav/document.rtf
+```
+
+You may do not specify target local path, in this case file will be downloaded to the current folder with the
+
+#### Upload file
+```sh
+gowebdav -X PUT temp/uploaded.txt /tmp/webdav/to_upload.txt
+```
+
+#### Move file on the remote server
+```sh
+gowebdav -X MV temp/file.txt temp/moved_file.txt
+```
+
+#### Copy file to another location
+```sh
+gowebdav -X MV temp/file.txt temp/file-copy.txt
+```
+
+#### Delete file from the remote server
+```sh
+gowebdav -X DEL temp/file.txt
+```
+
+# Wrapper script
+
+You can create wrapper script for your server (via `$EDITOR ./dav && chmod a+x ./dav`) and add following content to it:
+```sh
+#!/bin/sh
+
+ROOT="https://my.dav.server/" \
+USER="foo" \
+PASSWORD="$(pass dav/foo@my.dav.server)" \
+gowebdav $@
+```
+
+It allows you to use [pass](https://www.passwordstore.org/ "the standard unix password manager") or similar tools to retrieve the password.
+
+## Examples
+
+Using the `dav` wrapper:
+
+```sh
+$ ./dav -X LS /
+
+$ echo hi dav! > hello && ./dav -X PUT /hello
+$ ./dav -X STAT /hello
+$ ./dav -X PUT /hello_dav hello
+$ ./dav -X GET /hello_dav
+$ ./dav -X GET /hello_dav hello.txt
+```

cmd/gowebdav/main.go

@@ -9,13 +9,14 @@ import (
 	"os"
 	"os/user"
 	"path/filepath"
+	"runtime"
 	"strings"
 )
 
 func main() {
 	root := flag.String("root", os.Getenv("ROOT"), "WebDAV Endpoint [ENV.ROOT]")
-	usr := flag.String("user", os.Getenv("USER"), "User [ENV.USER]")
-	pw := flag.String("pw", os.Getenv("PASSWORD"), "Password [ENV.PASSWORD]")
+	user := flag.String("user", os.Getenv("USER"), "User [ENV.USER]")
+	password := flag.String("pw", os.Getenv("PASSWORD"), "Password [ENV.PASSWORD]")
 	netrc := flag.String("netrc-file", filepath.Join(getHome(), ".netrc"), "read login from netrc file")
 	method := flag.String("X", "", `Method:
 	LS <PATH>
@@ -38,21 +39,18 @@ func main() {
 		fail("Set WebDAV ROOT")
 	}
 
-	if l := len(flag.Args()); l == 0 || l > 2 {
+	if argsLength := len(flag.Args()); argsLength == 0 || argsLength > 2 {
 		fail("Unsupported arguments")
 	}
 
-	if *pw == "" {
+	if *password == "" {
 		if u, p := d.ReadConfig(*root, *netrc); u != "" && p != "" {
-			usr = &u
-			pw = &p
+			user = &u
+			password = &p
 		}
 	}
 
-	c := d.NewClient(*root, *usr, *pw)
-	if err := c.Connect(); err != nil {
-		fail(fmt.Sprintf("Failed to connect due to: %s", err.Error()))
-	}
+	c := d.NewClient(*root, *user, *password)
 
 	cmd := getCmd(*method)
 
@@ -69,10 +67,21 @@ func fail(err interface{}) {
 }
 
 func getHome() string {
-	if u, e := user.Current(); e != nil {
+	u, e := user.Current()
+	if e != nil {
+		return os.Getenv("HOME")
+	}
+
+	if u != nil {
 		return u.HomeDir
 	}
-	return os.Getenv("HOME")
+
+	switch runtime.GOOS {
+	case "windows":
+		return ""
+	default:
+		return "~/"
+	}
 }
 
 func getCmd(method string) func(c *d.Client, p0, p1 string) error {
@@ -214,8 +223,12 @@ func writeFile(path string, bytes []byte, mode os.FileMode) error {
 }
 
 func getStream(pathOrString string) (io.ReadCloser, error) {
+
 	fi, err := os.Stat(pathOrString)
-	if err == nil {
+	if err != nil {
+		return nil, err
+	}
+
 	if fi.IsDir() {
 		return nil, &os.PathError{
 			Op:   "Open",
@@ -223,23 +236,15 @@ func getStream(pathOrString string) (io.ReadCloser, error) {
 			Err:  errors.New("Path: '" + pathOrString + "' is a directory"),
 		}
 	}
+
 	f, err := os.Open(pathOrString)
 	if err == nil {
 		return f, nil
 	}
+
 	return nil, &os.PathError{
 		Op:   "Open",
 		Path: pathOrString,
 		Err:  err,
 	}
 }
-	return nopCloser{strings.NewReader(pathOrString)}, nil
-}
-
-type nopCloser struct {
-	io.Reader
-}
-
-func (nopCloser) Close() error {
-	return nil
-}

digestAuth.go

@@ -33,23 +33,26 @@ func (d *DigestAuth) Pass() string {
 }
 
 // Authorize the current request
-func (d *DigestAuth) Authorize(c *Client, method string, path string) {
+func (d *DigestAuth) Authorize(req *http.Request, 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))
+	req.Header.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"}
+		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.Split(r, `"`)[1]
+					result[w] = strings.Trim(
+						strings.SplitN(r, `=`, 2)[1],
+						`"`,
+					)
 				}
 			}
 		}
@@ -72,12 +75,72 @@ func getCnonce() string {
 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.
-	ha1 := getMD5(d["username"] + ":" + d["realm"] + ":" + d["password"])
-	ha2 := getMD5(d["method"] + ":" + d["uri"])
-	nonceCount := 00000001
-	cnonce := getCnonce()
-	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", cnonce="%s", nc="%v", qop="%s", response="%s", opaque="%s"`,
-		d["username"], d["realm"], d["nonce"], d["uri"], cnonce, nonceCount, d["qop"], response, d["opaque"])
+
+	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
 }

file.go

@@ -17,6 +17,11 @@ type File struct {
 	isdir       bool
 }
 
+// Path returns the full path of a file
+func (f File) Path() string {
+	return f.path
+}
+
 // Name returns the name of a file
 func (f File) Name() string {
 	return f.name

go.mod

@@ -0,0 +1,3 @@
+module github.com/studio-b12/gowebdav
+
+go 1.17

requests.go

@@ -1,14 +1,49 @@
 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) {
-	r, err := http.NewRequest(method, PathEscape(Join(c.root, path)), body)
+	var r *http.Request
+	var retryBuf io.Reader
+
+	if body != nil {
+		// Because Request#Do closes closable streams, Seeker#Seek
+		// will fail on retry because stream is already  closed.
+		// This inhibits the closing of the passed stream on passing
+		// it to the RoundTripper and closes the stream after we
+		// are done with the body content.
+		if cl, ok := body.(io.Closer); ok {
+			body = closeInhibitor{body}
+			defer cl.Close()
+		}
+		// If the authorization fails, we will need to restart reading
+		// from the passed body stream.
+		// When body is seekable, use seek to reset the streams
+		// cursor to the start.
+		// Otherwise, copy the stream into a buffer while uploading
+		// and use the buffers content on retry.
+		if sk, ok := body.(io.Seeker); ok {
+			if _, err = sk.Seek(0, io.SeekStart); err != nil {
+				return
+			}
+			retryBuf = body
+		} else {
+			buff := &bytes.Buffer{}
+			retryBuf = buff
+			body = io.TeeReader(body, buff)
+		}
+		r, err = http.NewRequest(method, PathEscape(Join(c.root, path)), body)
+	} else {
+		r, err = http.NewRequest(method, PathEscape(Join(c.root, path)), nil)
+	}
+
 	if err != nil {
 		return nil, err
 	}
@@ -19,21 +54,58 @@ func (c *Client) req(method, path string, body io.Reader, intercept func(*http.R
 		}
 	}
 
-	c.auth.Authorize(c, method, path)
+	// make sure we read 'c.auth' only once since it will be substituted below
+	// and that is unsafe to do when multiple goroutines are running at the same time.
+	c.authMutex.Lock()
+	auth := c.auth
+	c.authMutex.Unlock()
+
+	auth.Authorize(r, method, path)
 
 	if intercept != nil {
 		intercept(r)
 	}
 
-	return c.c.Do(r)
+	if c.interceptor != nil {
+		c.interceptor(method, r)
+	}
+
+	rs, err := c.c.Do(r)
+	if err != nil {
+		return nil, err
+	}
+
+	if rs.StatusCode == 401 && auth.Type() == "NoAuth" {
+		wwwAuthenticateHeader := strings.ToLower(rs.Header.Get("Www-Authenticate"))
+
+		if strings.Index(wwwAuthenticateHeader, "digest") > -1 {
+			c.authMutex.Lock()
+			c.auth = &DigestAuth{auth.User(), auth.Pass(), digestParts(rs)}
+			c.authMutex.Unlock()
+		} else if strings.Index(wwwAuthenticateHeader, "basic") > -1 {
+			c.authMutex.Lock()
+			c.auth = &BasicAuth{auth.User(), auth.Pass()}
+			c.authMutex.Unlock()
+		} else {
+			return rs, newPathError("Authorize", c.root, rs.StatusCode)
+		}
+
+		// retryBuf will be nil if body was nil initially so no check
+		// for body == nil is required here.
+		return c.req(method, path, retryBuf, 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)
-	defer rs.Body.Close()
 	if err != nil {
 		return 400
 	}
+	defer rs.Body.Close()
 
 	if rs.StatusCode == 201 || rs.StatusCode == 405 {
 		return 201
@@ -55,16 +127,16 @@ func (c *Client) propfind(path string, self bool, body string, resp interface{},
 		} else {
 			rq.Header.Add("Depth", "1")
 		}
-		rq.Header.Add("Content-Type", "text/xml;charset=UTF-8")
+		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", "")
 	})
-	defer rs.Body.Close()
 	if err != nil {
 		return err
 	}
+	defer rs.Body.Close()
 
 	if rs.StatusCode != 207 {
 		return fmt.Errorf("%s - %s %s", rs.Status, "PROPFIND", path)
@@ -90,7 +162,9 @@ func (c *Client) doCopyMove(method string, oldpath string, newpath string, overw
 
 func (c *Client) copymove(method string, oldpath string, newpath string, overwrite bool) error {
 	s, data := c.doCopyMove(method, oldpath, newpath, overwrite)
+	if data != nil {
 		defer data.Close()
+	}
 
 	switch s {
 	case 201, 204:
@@ -101,7 +175,12 @@ func (c *Client) copymove(method string, oldpath string, newpath string, overwri
 		log(fmt.Sprintf(" TODO handle %s - %s multistatus result %s", method, oldpath, String(data)))
 
 	case 409:
-		// TODO create dst path
+		err := c.createParentCollection(newpath)
+		if err != nil {
+			return err
+		}
+
+		return c.copymove(method, oldpath, newpath, overwrite)
 	}
 
 	return newPathError(method, oldpath, s)
@@ -109,10 +188,19 @@ func (c *Client) copymove(method string, oldpath string, newpath string, overwri
 
 func (c *Client) put(path string, stream io.Reader) int {
 	rs, err := c.req("PUT", path, stream, nil)
-	defer rs.Body.Close()
 	if err != nil {
 		return 400
 	}
+	defer rs.Body.Close()
 
 	return rs.StatusCode
 }
+
+func (c *Client) createParentCollection(itemPath string) (err error) {
+	parentPath := path.Dir(itemPath)
+	if parentPath == "." || parentPath == "/" {
+		return nil
+	}
+
+	return c.MkdirAll(parentPath, 0755)
+}

utils.go

@@ -32,7 +32,7 @@ func newPathErrorErr(op string, path string, err error) error {
 	}
 }
 
-// PathEscape escapes all segemnts of a given path
+// PathEscape escapes all segments of a given path
 func PathEscape(path string) string {
 	s := strings.Split(path, "/")
 	for i, e := range s {
@@ -51,9 +51,10 @@ func FixSlash(s string) string {
 
 // FixSlashes appends and prepends a / if they are missing
 func FixSlashes(s string) string {
-	if s[0] != '/' {
+	if !strings.HasPrefix(s, "/") {
 		s = "/" + s
 	}
+
 	return FixSlash(s)
 }
 
@@ -107,3 +108,39 @@ func parseXML(data io.Reader, resp interface{}, parse func(resp interface{}) err
 	}
 	return nil
 }
+
+// limitedReadCloser wraps a io.ReadCloser and limits the number of bytes that can be read from it.
+type limitedReadCloser struct {
+	rc        io.ReadCloser
+	remaining int
+}
+
+func (l *limitedReadCloser) Read(buf []byte) (int, error) {
+	if l.remaining <= 0 {
+		return 0, io.EOF
+	}
+
+	if len(buf) > l.remaining {
+		buf = buf[0:l.remaining]
+	}
+
+	n, err := l.rc.Read(buf)
+	l.remaining -= n
+
+	return n, err
+}
+
+func (l *limitedReadCloser) Close() error {
+	return l.rc.Close()
+}
+
+// closeInhibitor implements io.Closer and
+// wraps a Reader. When Close() is performed
+// on it, it will simply be silently rejected.
+type closeInhibitor struct {
+	io.Reader
+}
+
+func (ci closeInhibitor) Close() error {
+	return nil
+}

utils_test.go

@@ -43,3 +43,25 @@ func TestEscapeURL(t *testing.T) {
 		t.Error("expected: " + ex + " got: " + u.String())
 	}
 }
+
+func TestFixSlashes(t *testing.T) {
+	expected := "/"
+
+	if got := FixSlashes(""); got != expected {
+		t.Errorf("expected: %q, got: %q", expected, got)
+	}
+
+	expected = "/path/"
+
+	if got := FixSlashes("path"); got != expected {
+		t.Errorf("expected: %q, got: %q", expected, got)
+	}
+
+	if got := FixSlashes("/path"); got != expected {
+		t.Errorf("expected: %q, got: %q", expected, got)
+	}
+
+	if got := FixSlashes("path/"); got != expected {
+		t.Errorf("expected: %q, got: %q", expected, got)
+	}
+}