ReceiveMail関数の追加。テストの追加、修正。

pop3.go

@@ -9,6 +9,10 @@ import (
 	"strings"
 )
 
+var (
+	EOF = errors.New("skip the all mail remaining")
+)
+
 // MessageInfo has Number, Size, and Uid fields,
 // and used as a return value of ListAll and UidlAll.
 // When used as the return value of the method ListAll,
@@ -196,6 +200,67 @@ func (c *Client) Quit() error {
 	return c.cmdSimple("QUIT")
 }
 
+// ReceiveMail connects to the server at addr,
+// and authenticates with user and pass,
+// and calling receiveFn for each mail.
+func ReceiveMail(addr, user, pass string, receiveFn ReceiveMailFunc) error {
+	c, err := Dial(addr)
+
+	if err != nil {
+		return err
+	}
+
+	defer func() {
+		c.Quit()
+		c.Close()
+	}()
+
+	if err = c.User(user); err != nil {
+		return err
+	}
+
+	if err = c.Pass(pass); err != nil {
+		return err
+	}
+
+	var mis []MessageInfo
+
+	if mis, err = c.UidlAll(); err != nil {
+		return err
+	}
+
+	for _, mi := range mis {
+		var data string
+
+		data, err = c.Retr(mi.Number)
+
+		del, err := receiveFn(mi.Number, mi.Uid, data, err)
+
+		if err != nil && err != EOF {
+			return err
+		}
+
+		if del {
+			if err = c.Dele(mi.Number); err != nil {
+				return err
+			}
+		}
+
+		if err == EOF {
+			break
+		}
+	}
+
+	return nil
+}
+
+// ReceiveMailFunc is the type of the function called for each mail.
+// Its arguments are mail's number, uid, data, and mail receiving error.
+// if this function returns false value, the mail will be deleted,
+// if its returns EOF, skip the all mail of remaining.
+// (after deleting mail, if necessary)
+type ReceiveMailFunc func(number int, uid, data string, err error) (bool, error)
+
 func (c *Client) cmdSimple(format string, args ...interface{}) error {
 	var err error
 

pop3_test.go

@@ -300,3 +300,7 @@ func (f faker) RemoteAddr() net.Addr             { return nil }
 func (f faker) SetDeadline(time.Time) error      { return nil }
 func (f faker) SetReadDeadline(time.Time) error  { return nil }
 func (f faker) SetWriteDeadline(time.Time) error { return nil }
+
+func TestReceiveMail(t *testing.T) {
+	t.Skipf("sorry this test has not implemented.")
+}

pop3proto_test.go

@@ -67,13 +67,13 @@ func TestReadResponse(t *testing.T) {
 
 	r = reader("message\n")
 	s, err = r.ReadResponse()
-	if s != "" || err == nil || err.Error() != "レスポンスのフォーマットが不正です。: message" {
+	if s != "" || err == nil || err.Error() != "invalid response format: message" {
 		t.Fatalf("%v, %v", s, err)
 	}
 
 	r = reader("* message\n")
 	s, err = r.ReadResponse()
-	if s != "" || err == nil || err.Error() != "レスポンスの内容が不明です。: * message" {
+	if s != "" || err == nil || err.Error() != "unknown response: * message" {
 		t.Fatalf("%v, %v", s, err)
 	}
 }