add a basic front-end web interface for end-users

Fixes #339 #321 #398

httpd/handler.go

@@ -0,0 +1,104 @@
+package httpd
+
+import (
+	"io"
+	"net/http"
+	"os"
+	"path"
+	"strings"
+
+	"github.com/drakkan/sftpgo/common"
+	"github.com/drakkan/sftpgo/dataprovider"
+	"github.com/drakkan/sftpgo/logger"
+	"github.com/drakkan/sftpgo/utils"
+)
+
+// Connection details for a HTTP connection used to inteact with an SFTPGo filesystem
+type Connection struct {
+	*common.BaseConnection
+	request *http.Request
+}
+
+// GetClientVersion returns the connected client's version.
+func (c *Connection) GetClientVersion() string {
+	if c.request != nil {
+		return c.request.UserAgent()
+	}
+	return ""
+}
+
+// GetRemoteAddress return the connected client's address
+func (c *Connection) GetRemoteAddress() string {
+	if c.request != nil {
+		return c.request.RemoteAddr
+	}
+	return ""
+}
+
+// Disconnect closes the active transfer
+func (c *Connection) Disconnect() (err error) {
+	return c.SignalTransfersAbort()
+}
+
+// GetCommand returns the request method
+func (c *Connection) GetCommand() string {
+	if c.request != nil {
+		return strings.ToUpper(c.request.Method)
+	}
+	return ""
+}
+
+// Stat returns a FileInfo describing the named file/directory, or an error,
+// if any happens
+func (c *Connection) Stat(name string, mode int) (os.FileInfo, error) {
+	c.UpdateLastActivity()
+
+	name = utils.CleanPath(name)
+	if !c.User.HasPerm(dataprovider.PermListItems, path.Dir(name)) {
+		return nil, c.GetPermissionDeniedError()
+	}
+
+	fi, err := c.DoStat(name, mode)
+	if err != nil {
+		c.Log(logger.LevelDebug, "error running stat on path %#v: %+v", name, err)
+		return nil, err
+	}
+	return fi, err
+}
+
+// ReadDir returns a list of directory entries
+func (c *Connection) ReadDir(name string) ([]os.FileInfo, error) {
+	c.UpdateLastActivity()
+
+	name = utils.CleanPath(name)
+	return c.ListDir(name)
+}
+
+func (c *Connection) getFileReader(name string, offset int64) (io.ReadCloser, error) {
+	c.UpdateLastActivity()
+
+	name = utils.CleanPath(name)
+	if !c.User.HasPerm(dataprovider.PermDownload, path.Dir(name)) {
+		return nil, os.ErrPermission
+	}
+
+	if !c.User.IsFileAllowed(name) {
+		c.Log(logger.LevelWarn, "reading file %#v is not allowed", name)
+		return nil, os.ErrPermission
+	}
+
+	fs, p, err := c.GetFsAndResolvedPath(name)
+	if err != nil {
+		return nil, err
+	}
+
+	file, r, cancelFn, err := fs.Open(p, offset)
+	if err != nil {
+		c.Log(logger.LevelWarn, "could not open file %#v for reading: %+v", p, err)
+		return nil, c.GetFsError(fs, err)
+	}
+
+	baseTransfer := common.NewBaseTransfer(file, c.BaseConnection, cancelFn, p, name, common.TransferDownload,
+		0, 0, 0, false, fs)
+	return newHTTPDFile(baseTransfer, r), nil
+}