go-webdav/client.go
2020-01-22 12:06:36 +01:00

229 lines
4.6 KiB
Go

package webdav
import (
"fmt"
"io"
"net/http"
"strconv"
"time"
"github.com/emersion/go-webdav/internal"
)
// Client provides access to a remote WebDAV filesystem.
type Client struct {
ic *internal.Client
}
func NewClient(c *http.Client, endpoint string) (*Client, error) {
ic, err := internal.NewClient(c, endpoint)
if err != nil {
return nil, err
}
return &Client{ic}, nil
}
func (c *Client) SetBasicAuth(username, password string) {
c.ic.SetBasicAuth(username, password)
}
func (c *Client) FindCurrentUserPrincipal() (string, error) {
propfind := internal.NewPropNamePropfind(internal.CurrentUserPrincipalName)
resp, err := c.ic.PropfindFlat("/", propfind)
if err != nil {
return "", err
}
var prop internal.CurrentUserPrincipal
if err := resp.DecodeProp(&prop); err != nil {
return "", err
}
if prop.Unauthenticated != nil {
return "", fmt.Errorf("webdav: unauthenticated")
}
return prop.Href.Path, nil
}
var fileInfoPropfind = internal.NewPropNamePropfind(
internal.ResourceTypeName,
internal.GetContentLengthName,
internal.GetLastModifiedName,
internal.GetContentTypeName,
internal.GetETagName,
)
func fileInfoFromResponse(resp *internal.Response) (*FileInfo, error) {
path, err := resp.Path()
if err != nil {
return nil, err
}
fi := &FileInfo{Path: path}
var resType internal.ResourceType
if err := resp.DecodeProp(&resType); err != nil {
return nil, err
}
if resType.Is(internal.CollectionName) {
fi.IsDir = true
} else {
var getLen internal.GetContentLength
if err := resp.DecodeProp(&getLen); err != nil {
return nil, err
}
var getMod internal.GetLastModified
if err := resp.DecodeProp(&getMod); err != nil && !internal.IsNotFound(err) {
return nil, err
}
var getType internal.GetContentType
if err := resp.DecodeProp(&getType); err != nil && !internal.IsNotFound(err) {
return nil, err
}
var getETag internal.GetETag
if err := resp.DecodeProp(&getETag); err != nil && !internal.IsNotFound(err) {
return nil, err
}
etag, err := strconv.Unquote(getETag.ETag)
if err != nil {
return nil, fmt.Errorf("webdav: failed to unquote ETag: %v", err)
}
fi.Size = getLen.Length
fi.ModTime = time.Time(getMod.LastModified)
fi.MIMEType = getType.Type
fi.ETag = etag
}
return fi, nil
}
func (c *Client) Stat(name string) (*FileInfo, error) {
resp, err := c.ic.PropfindFlat(name, fileInfoPropfind)
if err != nil {
return nil, err
}
return fileInfoFromResponse(resp)
}
func (c *Client) Open(name string) (io.ReadCloser, error) {
req, err := c.ic.NewRequest(http.MethodGet, name, nil)
if err != nil {
return nil, err
}
resp, err := c.ic.Do(req)
if err != nil {
return nil, err
}
return resp.Body, nil
}
func (c *Client) Readdir(name string, recursive bool) ([]FileInfo, error) {
depth := internal.DepthOne
if recursive {
depth = internal.DepthInfinity
}
ms, err := c.ic.Propfind(name, depth, fileInfoPropfind)
if err != nil {
return nil, err
}
l := make([]FileInfo, 0, len(ms.Responses))
for _, resp := range ms.Responses {
fi, err := fileInfoFromResponse(&resp)
if err != nil {
return l, err
}
l = append(l, *fi)
}
return l, nil
}
type fileWriter struct {
pw *io.PipeWriter
done <-chan error
}
func (fw *fileWriter) Write(b []byte) (int, error) {
return fw.pw.Write(b)
}
func (fw *fileWriter) Close() error {
if err := fw.pw.Close(); err != nil {
return err
}
return <-fw.done
}
func (c *Client) Create(name string) (io.WriteCloser, error) {
pr, pw := io.Pipe()
req, err := c.ic.NewRequest(http.MethodPut, name, pr)
if err != nil {
pw.Close()
return nil, err
}
done := make(chan error, 1)
go func() {
_, err := c.ic.Do(req)
done <- err
}()
return &fileWriter{pw, done}, nil
}
func (c *Client) RemoveAll(name string) error {
req, err := c.ic.NewRequest(http.MethodDelete, name, nil)
if err != nil {
return err
}
_, err = c.ic.Do(req)
return err
}
func (c *Client) Mkdir(name string) error {
req, err := c.ic.NewRequest("MKCOL", name, nil)
if err != nil {
return err
}
_, err = c.ic.Do(req)
return err
}
func (c *Client) CopyAll(name, dest string, overwrite bool) error {
req, err := c.ic.NewRequest("COPY", name, nil)
if err != nil {
return err
}
req.Header.Set("Destination", c.ic.ResolveHref(dest).String())
req.Header.Set("Overwrite", internal.FormatOverwrite(overwrite))
_, err = c.ic.Do(req)
return err
}
func (c *Client) MoveAll(name, dest string, overwrite bool) error {
req, err := c.ic.NewRequest("MOVE", name, nil)
if err != nil {
return err
}
req.Header.Set("Destination", c.ic.ResolveHref(dest).String())
req.Header.Set("Overwrite", internal.FormatOverwrite(overwrite))
_, err = c.ic.Do(req)
return err
}