diff --git a/handlers.go b/handlers.go new file mode 100644 index 0000000..21873a7 --- /dev/null +++ b/handlers.go @@ -0,0 +1,275 @@ +package koushin + +import ( + "fmt" + "io/ioutil" + "mime" + "net/http" + "net/url" + "strconv" + "strings" + + "github.com/emersion/go-imap" + imapclient "github.com/emersion/go-imap/client" + "github.com/emersion/go-message" + "github.com/emersion/go-sasl" + "github.com/labstack/echo/v4" +) + +func handleGetMailbox(ectx echo.Context) error { + ctx := ectx.(*context) + + mboxName, err := url.PathUnescape(ctx.Param("mbox")) + if err != nil { + return echo.NewHTTPError(http.StatusBadRequest, err) + } + + page := 0 + if pageStr := ctx.QueryParam("page"); pageStr != "" { + var err error + if page, err = strconv.Atoi(pageStr); err != nil || page < 0 { + return echo.NewHTTPError(http.StatusBadRequest, "invalid page index") + } + } + + var mailboxes []*imap.MailboxInfo + var msgs []imapMessage + var mbox *imap.MailboxStatus + err = ctx.session.Do(func(c *imapclient.Client) error { + var err error + if mailboxes, err = listMailboxes(c); err != nil { + return err + } + if msgs, err = listMessages(c, mboxName, page); err != nil { + return err + } + mbox = c.Mailbox() + return nil + }) + if err != nil { + return err + } + + prevPage, nextPage := -1, -1 + if page > 0 { + prevPage = page - 1 + } + if (page+1)*messagesPerPage < int(mbox.Messages) { + nextPage = page + 1 + } + + return ctx.Render(http.StatusOK, "mailbox.html", map[string]interface{}{ + "Mailbox": mbox, + "Mailboxes": mailboxes, + "Messages": msgs, + "PrevPage": prevPage, + "NextPage": nextPage, + }) +} + +func handleLogin(ectx echo.Context) error { + ctx := ectx.(*context) + username := ctx.FormValue("username") + password := ctx.FormValue("password") + if username != "" && password != "" { + conn, err := ctx.server.connectIMAP() + if err != nil { + return err + } + + if err := conn.Login(username, password); err != nil { + conn.Logout() + return ctx.Render(http.StatusOK, "login.html", nil) + } + + token, err := ctx.server.imap.pool.Put(conn, username, password) + if err != nil { + return fmt.Errorf("failed to put connection in pool: %v", err) + } + ctx.setToken(token) + + return ctx.Redirect(http.StatusFound, "/mailbox/INBOX") + } + + return ctx.Render(http.StatusOK, "login.html", nil) +} + +func handleLogout(ectx echo.Context) error { + ctx := ectx.(*context) + + err := ctx.session.Do(func(c *imapclient.Client) error { + return c.Logout() + }) + if err != nil { + return fmt.Errorf("failed to logout: %v", err) + } + + ctx.setToken("") + return ctx.Redirect(http.StatusFound, "/login") +} + +func handleGetPart(ctx *context, raw bool) error { + mboxName, uid, err := parseMboxAndUid(ctx.Param("mbox"), ctx.Param("uid")) + if err != nil { + return echo.NewHTTPError(http.StatusBadRequest, err) + } + partPathString := ctx.QueryParam("part") + partPath, err := parsePartPath(partPathString) + if err != nil { + return echo.NewHTTPError(http.StatusBadRequest, err) + } + + var msg *imapMessage + var part *message.Entity + var mbox *imap.MailboxStatus + err = ctx.session.Do(func(c *imapclient.Client) error { + var err error + msg, part, err = getMessagePart(c, mboxName, uid, partPath) + mbox = c.Mailbox() + return err + }) + if err != nil { + return err + } + + mimeType, _, err := part.Header.ContentType() + if err != nil { + return fmt.Errorf("failed to parse part Content-Type: %v", err) + } + if len(partPath) == 0 { + mimeType = "message/rfc822" + } + + if raw { + 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 != "" { + dispParams["filename"] = filename + } + disp := mime.FormatMediaType("attachment", dispParams) + ctx.Response().Header().Set("Content-Disposition", disp) + } + return ctx.Stream(http.StatusOK, mimeType, part.Body) + } + + var body string + if strings.HasPrefix(strings.ToLower(mimeType), "text/") { + b, err := ioutil.ReadAll(part.Body) + if err != nil { + return fmt.Errorf("failed to read part body: %v", err) + } + body = string(b) + } + + return ctx.Render(http.StatusOK, "message.html", map[string]interface{}{ + "Mailbox": mbox, + "Message": msg, + "Body": body, + "PartPath": partPathString, + "MailboxPage": (mbox.Messages - msg.SeqNum) / messagesPerPage, + }) +} + +func handleCompose(ectx echo.Context) error { + ctx := ectx.(*context) + + var msg OutgoingMessage + if strings.ContainsRune(ctx.session.username, '@') { + msg.From = ctx.session.username + } + + if ctx.Request().Method == http.MethodGet && ctx.Param("uid") != "" { + // This is a reply + mboxName, uid, err := parseMboxAndUid(ctx.Param("mbox"), ctx.Param("uid")) + if err != nil { + return echo.NewHTTPError(http.StatusBadRequest, err) + } + partPath, err := parsePartPath(ctx.QueryParam("part")) + if err != nil { + return echo.NewHTTPError(http.StatusBadRequest, err) + } + + var inReplyTo *imapMessage + var part *message.Entity + err = ctx.session.Do(func(c *imapclient.Client) error { + var err error + inReplyTo, part, err = getMessagePart(c, mboxName, uid, partPath) + return err + }) + if err != nil { + return err + } + + mimeType, _, err := part.Header.ContentType() + if err != nil { + return fmt.Errorf("failed to parse part Content-Type: %v", err) + } + + if !strings.HasPrefix(strings.ToLower(mimeType), "text/") { + err := fmt.Errorf("cannot reply to \"%v\" part", mimeType) + return echo.NewHTTPError(http.StatusBadRequest, err) + } + + msg.Text, err = quote(part.Body) + if err != nil { + return err + } + + msg.InReplyTo = inReplyTo.Envelope.MessageId + // TODO: populate From from known user addresses and inReplyTo.Envelope.To + replyTo := inReplyTo.Envelope.ReplyTo + if len(replyTo) == 0 { + replyTo = inReplyTo.Envelope.From + } + if len(replyTo) > 0 { + msg.To = make([]string, len(replyTo)) + for i, to := range replyTo { + msg.To[i] = to.MailboxName + "@" + to.HostName + } + } + msg.Subject = inReplyTo.Envelope.Subject + if !strings.HasPrefix(strings.ToLower(msg.Subject), "re:") { + msg.Subject = "Re: " + msg.Subject + } + } + + if ctx.Request().Method == http.MethodPost { + msg.From = ctx.FormValue("from") + msg.To = parseAddressList(ctx.FormValue("to")) + msg.Subject = ctx.FormValue("subject") + msg.Text = ctx.FormValue("text") + msg.InReplyTo = ctx.FormValue("in_reply_to") + + c, err := ctx.server.connectSMTP() + if err != nil { + return err + } + defer c.Close() + + auth := sasl.NewPlainClient("", ctx.session.username, ctx.session.password) + if err := c.Auth(auth); err != nil { + return echo.NewHTTPError(http.StatusForbidden, err) + } + + if err := sendMessage(c, &msg); err != nil { + return err + } + + if err := c.Quit(); err != nil { + return fmt.Errorf("QUIT failed: %v", err) + } + + // TODO: append to IMAP Sent mailbox + + return ctx.Redirect(http.StatusFound, "/mailbox/INBOX") + } + + return ctx.Render(http.StatusOK, "compose.html", map[string]interface{}{ + "Message": &msg, + }) +} diff --git a/server.go b/server.go index d9542b5..d8aeca7 100644 --- a/server.go +++ b/server.go @@ -2,18 +2,11 @@ package koushin import ( "fmt" - "io/ioutil" - "mime" "net/http" "net/url" - "strconv" "strings" "time" - "github.com/emersion/go-imap" - imapclient "github.com/emersion/go-imap/client" - "github.com/emersion/go-message" - "github.com/emersion/go-sasl" "github.com/labstack/echo/v4" ) @@ -117,199 +110,6 @@ func (c *context) setToken(token string) { c.SetCookie(&cookie) } -func handleLogin(ectx echo.Context) error { - ctx := ectx.(*context) - username := ctx.FormValue("username") - password := ctx.FormValue("password") - if username != "" && password != "" { - conn, err := ctx.server.connectIMAP() - if err != nil { - return err - } - - if err := conn.Login(username, password); err != nil { - conn.Logout() - return ctx.Render(http.StatusOK, "login.html", nil) - } - - token, err := ctx.server.imap.pool.Put(conn, username, password) - if err != nil { - return fmt.Errorf("failed to put connection in pool: %v", err) - } - ctx.setToken(token) - - return ctx.Redirect(http.StatusFound, "/mailbox/INBOX") - } - - return ctx.Render(http.StatusOK, "login.html", nil) -} - -func handleGetPart(ctx *context, raw bool) error { - mboxName, uid, err := parseMboxAndUid(ctx.Param("mbox"), ctx.Param("uid")) - if err != nil { - return echo.NewHTTPError(http.StatusBadRequest, err) - } - partPathString := ctx.QueryParam("part") - partPath, err := parsePartPath(partPathString) - if err != nil { - return echo.NewHTTPError(http.StatusBadRequest, err) - } - - var msg *imapMessage - var part *message.Entity - var mbox *imap.MailboxStatus - err = ctx.session.Do(func(c *imapclient.Client) error { - var err error - msg, part, err = getMessagePart(c, mboxName, uid, partPath) - mbox = c.Mailbox() - return err - }) - if err != nil { - return err - } - - mimeType, _, err := part.Header.ContentType() - if err != nil { - return fmt.Errorf("failed to parse part Content-Type: %v", err) - } - if len(partPath) == 0 { - mimeType = "message/rfc822" - } - - if raw { - 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 != "" { - dispParams["filename"] = filename - } - disp := mime.FormatMediaType("attachment", dispParams) - ctx.Response().Header().Set("Content-Disposition", disp) - } - return ctx.Stream(http.StatusOK, mimeType, part.Body) - } - - var body string - if strings.HasPrefix(strings.ToLower(mimeType), "text/") { - b, err := ioutil.ReadAll(part.Body) - if err != nil { - return fmt.Errorf("failed to read part body: %v", err) - } - body = string(b) - } - - return ctx.Render(http.StatusOK, "message.html", map[string]interface{}{ - "Mailbox": mbox, - "Message": msg, - "Body": body, - "PartPath": partPathString, - "MailboxPage": (mbox.Messages - msg.SeqNum) / messagesPerPage, - }) -} - -func handleCompose(ectx echo.Context) error { - ctx := ectx.(*context) - - var msg OutgoingMessage - if strings.ContainsRune(ctx.session.username, '@') { - msg.From = ctx.session.username - } - - if ctx.Request().Method == http.MethodGet && ctx.Param("uid") != "" { - // This is a reply - mboxName, uid, err := parseMboxAndUid(ctx.Param("mbox"), ctx.Param("uid")) - if err != nil { - return echo.NewHTTPError(http.StatusBadRequest, err) - } - partPath, err := parsePartPath(ctx.QueryParam("part")) - if err != nil { - return echo.NewHTTPError(http.StatusBadRequest, err) - } - - var inReplyTo *imapMessage - var part *message.Entity - err = ctx.session.Do(func(c *imapclient.Client) error { - var err error - inReplyTo, part, err = getMessagePart(c, mboxName, uid, partPath) - return err - }) - if err != nil { - return err - } - - mimeType, _, err := part.Header.ContentType() - if err != nil { - return fmt.Errorf("failed to parse part Content-Type: %v", err) - } - - if !strings.HasPrefix(strings.ToLower(mimeType), "text/") { - err := fmt.Errorf("cannot reply to \"%v\" part", mimeType) - return echo.NewHTTPError(http.StatusBadRequest, err) - } - - msg.Text, err = quote(part.Body) - if err != nil { - return err - } - - msg.InReplyTo = inReplyTo.Envelope.MessageId - // TODO: populate From from known user addresses and inReplyTo.Envelope.To - replyTo := inReplyTo.Envelope.ReplyTo - if len(replyTo) == 0 { - replyTo = inReplyTo.Envelope.From - } - if len(replyTo) > 0 { - msg.To = make([]string, len(replyTo)) - for i, to := range replyTo { - msg.To[i] = to.MailboxName + "@" + to.HostName - } - } - msg.Subject = inReplyTo.Envelope.Subject - if !strings.HasPrefix(strings.ToLower(msg.Subject), "re:") { - msg.Subject = "Re: " + msg.Subject - } - } - - if ctx.Request().Method == http.MethodPost { - msg.From = ctx.FormValue("from") - msg.To = parseAddressList(ctx.FormValue("to")) - msg.Subject = ctx.FormValue("subject") - msg.Text = ctx.FormValue("text") - msg.InReplyTo = ctx.FormValue("in_reply_to") - - c, err := ctx.server.connectSMTP() - if err != nil { - return err - } - defer c.Close() - - auth := sasl.NewPlainClient("", ctx.session.username, ctx.session.password) - if err := c.Auth(auth); err != nil { - return echo.NewHTTPError(http.StatusForbidden, err) - } - - if err := sendMessage(c, &msg); err != nil { - return err - } - - if err := c.Quit(); err != nil { - return fmt.Errorf("QUIT failed: %v", err) - } - - // TODO: append to IMAP Sent mailbox - - return ctx.Redirect(http.StatusFound, "/mailbox/INBOX") - } - - return ctx.Render(http.StatusOK, "compose.html", map[string]interface{}{ - "Message": &msg, - }) -} - func isPublic(path string) bool { return path == "/login" || strings.HasPrefix(path, "/assets/") || strings.HasPrefix(path, "/themes/") @@ -370,56 +170,7 @@ func New(e *echo.Echo, options *Options) error { } }) - e.GET("/mailbox/:mbox", func(ectx echo.Context) error { - ctx := ectx.(*context) - - mboxName, err := url.PathUnescape(ctx.Param("mbox")) - if err != nil { - return echo.NewHTTPError(http.StatusBadRequest, err) - } - - page := 0 - if pageStr := ctx.QueryParam("page"); pageStr != "" { - var err error - if page, err = strconv.Atoi(pageStr); err != nil || page < 0 { - return echo.NewHTTPError(http.StatusBadRequest, "invalid page index") - } - } - - var mailboxes []*imap.MailboxInfo - var msgs []imapMessage - var mbox *imap.MailboxStatus - err = ctx.session.Do(func(c *imapclient.Client) error { - var err error - if mailboxes, err = listMailboxes(c); err != nil { - return err - } - if msgs, err = listMessages(c, mboxName, page); err != nil { - return err - } - mbox = c.Mailbox() - return nil - }) - if err != nil { - return err - } - - prevPage, nextPage := -1, -1 - if page > 0 { - prevPage = page - 1 - } - if (page+1)*messagesPerPage < int(mbox.Messages) { - nextPage = page + 1 - } - - return ctx.Render(http.StatusOK, "mailbox.html", map[string]interface{}{ - "Mailbox": mbox, - "Mailboxes": mailboxes, - "Messages": msgs, - "PrevPage": prevPage, - "NextPage": nextPage, - }) - }) + e.GET("/mailbox/:mbox", handleGetMailbox) e.GET("/message/:mbox/:uid", func(ectx echo.Context) error { ctx := ectx.(*context) @@ -433,19 +184,7 @@ func New(e *echo.Echo, options *Options) error { e.GET("/login", handleLogin) e.POST("/login", handleLogin) - e.GET("/logout", func(ectx echo.Context) error { - ctx := ectx.(*context) - - err := ctx.session.Do(func(c *imapclient.Client) error { - return c.Logout() - }) - if err != nil { - return fmt.Errorf("failed to logout: %v", err) - } - - ctx.setToken("") - return ctx.Redirect(http.StatusFound, "/login") - }) + e.GET("/logout", handleLogout) e.GET("/compose", handleCompose) e.POST("/compose", handleCompose)