feat: add webdav driver

pkg/gowebdav/utils.go

@@ -0,0 +1,118 @@
+package gowebdav
+
+import (
+	"bytes"
+	"encoding/xml"
+	"fmt"
+	"io"
+	"net/url"
+	"strconv"
+	"strings"
+	"time"
+)
+
+func log(msg interface{}) {
+	fmt.Println(msg)
+}
+
+// PathEscape escapes all segments 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 !strings.HasPrefix(s, "/") {
+		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
+}
+
+// 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()
+}