add ability to read login / pw from ~/.netrc

README.md

@@ -33,12 +33,14 @@ Usage of gowebdav
 
                 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]
+        User [ENV.USER] (default "$USER")
 ```
 
 *gowebdav wrapper script*
@@ -98,6 +100,7 @@ included.
 * [func FixSlashes(s string) string](#FixSlashes)
 * [func Join(path0 string, path1 string) string](#Join)
 * [func PathEscape(path string) string](#PathEscape)
+* [func ReadConfig(uri, netrc string) (string, string)](#ReadConfig)
 * [func String(r io.Reader) string](#String)
 * [type Authenticator](#Authenticator)
 * [type BasicAuth](#BasicAuth)
@@ -148,7 +151,7 @@ included.
 * [PathEscape](#example_PathEscape)
 
 ##### <a name="pkg-files">Package files</a>
-[basicAuth.go](https://github.com/studio-b12/gowebdav/blob/master/basicAuth.go) [client.go](https://github.com/studio-b12/gowebdav/blob/master/client.go) [digestAuth.go](https://github.com/studio-b12/gowebdav/blob/master/digestAuth.go) [doc.go](https://github.com/studio-b12/gowebdav/blob/master/doc.go) [file.go](https://github.com/studio-b12/gowebdav/blob/master/file.go) [requests.go](https://github.com/studio-b12/gowebdav/blob/master/requests.go) [utils.go](https://github.com/studio-b12/gowebdav/blob/master/utils.go) 
+[basicAuth.go](https://github.com/studio-b12/gowebdav/blob/master/basicAuth.go) [client.go](https://github.com/studio-b12/gowebdav/blob/master/client.go) [digestAuth.go](https://github.com/studio-b12/gowebdav/blob/master/digestAuth.go) [doc.go](https://github.com/studio-b12/gowebdav/blob/master/doc.go) [file.go](https://github.com/studio-b12/gowebdav/blob/master/file.go) [netrc.go](https://github.com/studio-b12/gowebdav/blob/master/netrc.go) [requests.go](https://github.com/studio-b12/gowebdav/blob/master/requests.go) [utils.go](https://github.com/studio-b12/gowebdav/blob/master/utils.go) 
 
 ### <a name="FixSlash">func</a> [FixSlash](https://github.com/studio-b12/gowebdav/blob/master/utils.go?s=707:737#L45)
 ``` go
@@ -174,6 +177,13 @@ func PathEscape(path string) string
 ```
 PathEscape escapes all segemnts of a given path
 
+### <a name="ReadConfig">func</a> [ReadConfig](https://github.com/studio-b12/gowebdav/blob/master/netrc.go?s=428:479#L27)
+``` go
+func ReadConfig(uri, netrc string) (string, string)
+```
+ReadConfig reads login and password configuration from ~/.netrc
+machine foo.com login username password 123456
+
 ### <a name="String">func</a> [String](https://github.com/studio-b12/gowebdav/blob/master/utils.go?s=1150:1181#L66)
 ``` go
 func String(r io.Reader) string

cmd/gowebdav/main.go

@@ -7,6 +7,7 @@ import (
 	d "github.com/studio-b12/gowebdav"
 	"io"
 	"os"
+	"os/user"
 	"path/filepath"
 	"strings"
 )
@@ -15,6 +16,7 @@ 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]")
+	netrc := flag.String("netrc-file", filepath.Join(getHome(), ".netrc"), "read login from netrc file")
 	method := flag.String("X", "", `Method:
 	LS <PATH>
 	STAT <PATH>
@@ -40,6 +42,13 @@ func main() {
 		fail("Unsupported arguments")
 	}
 
+	if *pw == "" {
+		if u, p := d.ReadConfig(*root, *netrc); u != "" && p != "" {
+			usr = &u
+			pw = &p
+		}
+	}
+
 	c := d.NewClient(*root, *usr, *pw)
 	if err := c.Connect(); err != nil {
 		fail(fmt.Sprintf("Failed to connect due to: %s", err.Error()))
@@ -59,6 +68,13 @@ func fail(err interface{}) {
 	os.Exit(-1)
 }
 
+func getHome() string {
+	if u, e := user.Current(); e != nil {
+		return u.HomeDir
+	}
+	return os.Getenv("HOME")
+}
+
 func getCmd(method string) func(c *d.Client, p0, p1 string) error {
 	switch strings.ToUpper(method) {
 	case "LS", "LIST", "PROPFIND":

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 "", ""
+}