Save username/password in session

This is required for authenticating with the SMTP server when composing
a new message.

conn_pool.go

@@ -20,30 +20,35 @@ func generateToken() (string, error) {
 
 var ErrSessionExpired = errors.New("session expired")
 
+type Session struct {
+	imapConn *imapclient.Client
+	username, password string
+}
+
 // TODO: expiration timer
 type ConnPool struct {
 	locker sync.Mutex
-	conns  map[string]*imapclient.Client
+	sessions  map[string]*Session
 }
 
 func NewConnPool() *ConnPool {
 	return &ConnPool{
-		conns: make(map[string]*imapclient.Client),
+		sessions: make(map[string]*Session),
 	}
 }
 
-func (pool *ConnPool) Get(token string) (*imapclient.Client, error) {
+func (pool *ConnPool) Get(token string) (*Session, error) {
 	pool.locker.Lock()
 	defer pool.locker.Unlock()
 
-	conn, ok := pool.conns[token]
+	session, ok := pool.sessions[token]
 	if !ok {
 		return nil, ErrSessionExpired
 	}
-	return conn, nil
+	return session, nil
 }
 
-func (pool *ConnPool) Put(conn *imapclient.Client) (token string, err error) {
+func (pool *ConnPool) Put(imapConn *imapclient.Client, username, password string) (token string, err error) {
 	pool.locker.Lock()
 	defer pool.locker.Unlock()
 
@@ -51,22 +56,26 @@ func (pool *ConnPool) Put(conn *imapclient.Client) (token string, err error) {
 		var err error
 		token, err = generateToken()
 		if err != nil {
-			conn.Logout()
+			imapConn.Logout()
 			return "", err
 		}
 
-		if _, ok := pool.conns[token]; !ok {
+		if _, ok := pool.sessions[token]; !ok {
 			break
 		}
 	}
 
-	pool.conns[token] = conn
+	pool.sessions[token] = &Session{
+		imapConn: imapConn,
+		username: username,
+		password: password,
+	}
 
 	go func() {
-		<-conn.LoggedOut()
+		<-imapConn.LoggedOut()
 
 		pool.locker.Lock()
-		delete(pool.conns, token)
+		delete(pool.sessions, token)
 		pool.locker.Unlock()
 	}()
 

server.go

@@ -93,6 +93,7 @@ func NewServer(imapURL, smtpURL string) (*Server, error) {
 type context struct {
 	echo.Context
 	server *Server
+	session *Session
 	conn   *imapclient.Client
 }
 
@@ -126,7 +127,7 @@ func handleLogin(ectx echo.Context) error {
 			return ctx.Render(http.StatusOK, "login.html", nil)
 		}
 
-		token, err := ctx.server.imap.pool.Put(conn)
+		token, err := ctx.server.imap.pool.Put(conn, username, password)
 		if err != nil {
 			return fmt.Errorf("failed to put connection in pool: %v", err)
 		}
@@ -167,6 +168,8 @@ func handleGetPart(ctx *context, raw bool) error {
 		disp, dispParams, _ := part.Header.ContentDisposition()
 		filename := dispParams["filename"]
 
+		// TODO: set Content-Length if possible
+
 		if !strings.EqualFold(mimeType, "text/plain") || strings.EqualFold(disp, "attachment") {
 			dispParams := make(map[string]string)
 			if filename != "" {
@@ -235,13 +238,14 @@ func New(imapURL, smtpURL string) *echo.Echo {
 				return err
 			}
 
-			ctx.conn, err = ctx.server.imap.pool.Get(cookie.Value)
+			ctx.session, err = ctx.server.imap.pool.Get(cookie.Value)
 			if err == ErrSessionExpired {
 				ctx.setToken("")
 				return ctx.Redirect(http.StatusFound, "/login")
 			} else if err != nil {
 				return err
 			}
+			ctx.conn = ctx.session.imapConn
 
 			return next(ctx)
 		}