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Avoid forever lock

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If we close the connection two times the second time will hang forever waiting for a server code.
This commit is contained in:
Davide D'Agostino 2017-05-01 18:18:54 -07:00 committed by Davide D'Agostino
parent 0895dc7f07
commit 58864d889b
1 changed files with 10 additions and 5 deletions
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15
ftp.go
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@ -47,8 +47,9 @@ type Entry struct {
// Response represents a data-connection
type Response struct {
conn net.Conn
c *ServerConn
conn net.Conn
c *ServerConn
connClosed bool
}
// Connect is an alias to Dial, for backward compatibility
@ -337,7 +338,7 @@ func (c *ServerConn) NameList(path string) (entries []string, err error) {
return
}
r := &Response{conn, c}
r := &Response{conn, c, false}
defer r.Close()
scanner := bufio.NewScanner(r)
@ -368,7 +369,7 @@ func (c *ServerConn) List(path string) (entries []*Entry, err error) {
return
}
r := &Response{conn, c}
r := &Response{conn, c, false}
defer r.Close()
scanner := bufio.NewScanner(r)
@ -445,7 +446,7 @@ func (c *ServerConn) RetrFrom(path string, offset uint64) (*Response, error) {
return nil, err
}
return &Response{conn, c}, nil
return &Response{conn, c, false}, nil
}
// Stor issues a STOR FTP command to store a file to the remote FTP server.
@ -537,11 +538,15 @@ func (r *Response) Read(buf []byte) (int, error) {
// Close implements the io.Closer interface on a FTP data connection.
func (r *Response) Close() error {
if r.connClosed == true {
return nil
}
err := r.conn.Close()
_, _, err2 := r.c.conn.ReadResponse(StatusClosingDataConnection)
if err2 != nil {
err = err2
}
r.connClosed = true
return err
}