alps/plugins/base/routes.go

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package koushinbase
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import (
"fmt"
"io/ioutil"
"mime"
"net/http"
"net/url"
"strconv"
"strings"
"git.sr.ht/~emersion/koushin"
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"github.com/emersion/go-imap"
imapmove "github.com/emersion/go-imap-move"
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imapclient "github.com/emersion/go-imap/client"
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"github.com/emersion/go-message"
"github.com/emersion/go-smtp"
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"github.com/labstack/echo/v4"
)
func registerRoutes(p *koushin.GoPlugin) {
p.GET("/", func(ctx *koushin.Context) error {
return ctx.Redirect(http.StatusFound, "/mailbox/INBOX")
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})
p.GET("/mailbox/:mbox", handleGetMailbox)
p.POST("/mailbox/:mbox", handleGetMailbox)
p.GET("/message/:mbox/:uid", func(ctx *koushin.Context) error {
return handleGetPart(ctx, false)
})
p.GET("/message/:mbox/:uid/raw", func(ctx *koushin.Context) error {
return handleGetPart(ctx, true)
})
p.GET("/login", handleLogin)
p.POST("/login", handleLogin)
p.GET("/logout", handleLogout)
p.GET("/compose", handleCompose)
p.POST("/compose", handleCompose)
p.GET("/message/:mbox/:uid/reply", handleCompose)
p.POST("/message/:mbox/:uid/reply", handleCompose)
p.POST("/message/:mbox/:uid/move", handleMove)
p.POST("/message/:mbox/:uid/delete", handleDelete)
p.POST("/message/:mbox/:uid/flag", handleSetFlags)
}
type MailboxRenderData struct {
koushin.BaseRenderData
Mailbox *imap.MailboxStatus
Mailboxes []*imap.MailboxInfo
Messages []IMAPMessage
PrevPage, NextPage int
Query string
}
func handleGetMailbox(ctx *koushin.Context) error {
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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")
}
}
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query := ctx.QueryParam("query")
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var mailboxes []*imap.MailboxInfo
var msgs []IMAPMessage
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var mbox *imap.MailboxStatus
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var total int
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err = ctx.Session.DoIMAP(func(c *imapclient.Client) error {
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var err error
if mailboxes, err = listMailboxes(c); err != nil {
return err
}
if query != "" {
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msgs, total, err = searchMessages(c, mboxName, query, page)
} else {
msgs, err = listMessages(c, mboxName, page)
}
if err != nil {
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return err
}
mbox = c.Mailbox()
return nil
})
if err != nil {
return err
}
prevPage, nextPage := -1, -1
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if query != "" {
if page > 0 {
prevPage = page - 1
}
if (page+1)*messagesPerPage <= total {
nextPage = page + 1
}
} else {
if page > 0 {
prevPage = page - 1
}
if (page+1)*messagesPerPage < int(mbox.Messages) {
nextPage = page + 1
}
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}
return ctx.Render(http.StatusOK, "mailbox.html", &MailboxRenderData{
BaseRenderData: *koushin.NewBaseRenderData(ctx),
Mailbox: mbox,
Mailboxes: mailboxes,
Messages: msgs,
PrevPage: prevPage,
NextPage: nextPage,
Query: query,
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})
}
func handleLogin(ctx *koushin.Context) error {
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username := ctx.FormValue("username")
password := ctx.FormValue("password")
if username != "" && password != "" {
s, err := ctx.Server.Sessions.Put(username, password)
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if err != nil {
if _, ok := err.(koushin.AuthError); ok {
return ctx.Render(http.StatusOK, "login.html", nil)
}
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return fmt.Errorf("failed to put connection in pool: %v", err)
}
ctx.SetSession(s)
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if path := ctx.QueryParam("next"); path != "" && path[0] == '/' && path != "/login" {
return ctx.Redirect(http.StatusFound, path)
}
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return ctx.Redirect(http.StatusFound, "/mailbox/INBOX")
}
return ctx.Render(http.StatusOK, "login.html", koushin.NewBaseRenderData(ctx))
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}
func handleLogout(ctx *koushin.Context) error {
ctx.Session.Close()
ctx.SetSession(nil)
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return ctx.Redirect(http.StatusFound, "/login")
}
type MessageRenderData struct {
koushin.BaseRenderData
Mailboxes []*imap.MailboxInfo
Mailbox *imap.MailboxStatus
Message *IMAPMessage
Body string
PartPath string
MailboxPage int
Flags map[string]bool
}
func handleGetPart(ctx *koushin.Context, raw bool) error {
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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 mailboxes []*imap.MailboxInfo
var msg *IMAPMessage
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var part *message.Entity
var mbox *imap.MailboxStatus
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err = ctx.Session.DoIMAP(func(c *imapclient.Client) error {
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var err error
if mailboxes, err = listMailboxes(c); err != nil {
return err
}
if msg, part, err = getMessagePart(c, mboxName, uid, partPath); err != nil {
return err
}
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mbox = c.Mailbox()
return nil
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})
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 {
ctx.Response().Header().Set("Content-Type", mimeType)
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disp, dispParams, _ := part.Header.ContentDisposition()
filename := dispParams["filename"]
if len(partPath) == 0 {
filename = msg.Envelope.Subject + ".eml"
}
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// 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)
}
if len(partPath) == 0 {
return part.WriteTo(ctx.Response())
} else {
return ctx.Stream(http.StatusOK, mimeType, part.Body)
}
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}
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)
}
flags := make(map[string]bool)
for _, f := range mbox.PermanentFlags {
f = imap.CanonicalFlag(f)
if f == imap.TryCreateFlag {
continue
}
flags[f] = msg.HasFlag(f)
}
return ctx.Render(http.StatusOK, "message.html", &MessageRenderData{
BaseRenderData: *koushin.NewBaseRenderData(ctx),
Mailboxes: mailboxes,
Mailbox: mbox,
Message: msg,
Body: body,
PartPath: partPathString,
MailboxPage: int(mbox.Messages-msg.SeqNum) / messagesPerPage,
Flags: flags,
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})
}
type ComposeRenderData struct {
koushin.BaseRenderData
Message *OutgoingMessage
}
func handleCompose(ctx *koushin.Context) error {
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var msg OutgoingMessage
if strings.ContainsRune(ctx.Session.Username(), '@') {
msg.From = ctx.Session.Username()
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}
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msg.To = strings.Split(ctx.QueryParam("to"), ",")
msg.Subject = ctx.QueryParam("subject")
msg.Text = ctx.QueryParam("body")
msg.InReplyTo = ctx.QueryParam("in-reply-to")
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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
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var part *message.Entity
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err = ctx.Session.DoIMAP(func(c *imapclient.Client) error {
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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.Address()
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}
}
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")
form, err := ctx.MultipartForm()
if err != nil {
return fmt.Errorf("failed to get multipart form: %v", err)
}
msg.Attachments = form.File["attachments"]
err = ctx.Session.DoSMTP(func(c *smtp.Client) error {
return sendMessage(c, &msg)
})
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if err != nil {
if _, ok := err.(koushin.AuthError); ok {
return echo.NewHTTPError(http.StatusForbidden, err)
}
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return err
}
// TODO: append to IMAP Sent mailbox
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// TODO: add \Answered flag to original IMAP message
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return ctx.Redirect(http.StatusFound, "/mailbox/INBOX")
}
return ctx.Render(http.StatusOK, "compose.html", &ComposeRenderData{
BaseRenderData: *koushin.NewBaseRenderData(ctx),
Message: &msg,
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})
}
func handleMove(ctx *koushin.Context) error {
mboxName, uid, err := parseMboxAndUid(ctx.Param("mbox"), ctx.Param("uid"))
if err != nil {
return echo.NewHTTPError(http.StatusBadRequest, err)
}
to := ctx.FormValue("to")
err = ctx.Session.DoIMAP(func(c *imapclient.Client) error {
mc := imapmove.NewClient(c)
if err := ensureMailboxSelected(c, mboxName); err != nil {
return err
}
var seqSet imap.SeqSet
seqSet.AddNum(uid)
if err := mc.UidMoveWithFallback(&seqSet, to); err != nil {
return fmt.Errorf("failed to move message: %v", err)
}
// TODO: get the UID of the message in the destination mailbox with UIDPLUS
return nil
})
if err != nil {
return err
}
return ctx.Redirect(http.StatusFound, fmt.Sprintf("/mailbox/%v", url.PathEscape(to)))
}
func handleDelete(ctx *koushin.Context) error {
mboxName, uid, err := parseMboxAndUid(ctx.Param("mbox"), ctx.Param("uid"))
if err != nil {
return echo.NewHTTPError(http.StatusBadRequest, err)
}
err = ctx.Session.DoIMAP(func(c *imapclient.Client) error {
if err := ensureMailboxSelected(c, mboxName); err != nil {
return err
}
var seqSet imap.SeqSet
seqSet.AddNum(uid)
item := imap.FormatFlagsOp(imap.AddFlags, true)
flags := []interface{}{imap.DeletedFlag}
if err := c.UidStore(&seqSet, item, flags, nil); err != nil {
return fmt.Errorf("failed to add deleted flag: %v", err)
}
if err := c.Expunge(nil); err != nil {
return fmt.Errorf("failed to expunge mailbox: %v", err)
}
// Deleting a message invalidates our cached message count
// TODO: listen to async updates instead
if _, err := c.Select(mboxName, false); err != nil {
return fmt.Errorf("failed to select mailbox: %v", err)
}
return nil
})
if err != nil {
return err
}
return ctx.Redirect(http.StatusFound, fmt.Sprintf("/mailbox/%v", url.PathEscape(mboxName)))
}
func handleSetFlags(ctx *koushin.Context) error {
mboxName, uid, err := parseMboxAndUid(ctx.Param("mbox"), ctx.Param("uid"))
if err != nil {
return echo.NewHTTPError(http.StatusBadRequest, err)
}
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form, err := ctx.FormParams()
if err != nil {
return echo.NewHTTPError(http.StatusBadRequest, err)
}
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flags, ok := form["flags"]
if !ok {
return echo.NewHTTPError(http.StatusBadRequest, "missing 'flags' form values")
}
err = ctx.Session.DoIMAP(func(c *imapclient.Client) error {
if err := ensureMailboxSelected(c, mboxName); err != nil {
return err
}
var seqSet imap.SeqSet
seqSet.AddNum(uid)
storeItems := make([]interface{}, len(flags))
for i, f := range flags {
storeItems[i] = f
}
item := imap.FormatFlagsOp(imap.SetFlags, true)
if err := c.UidStore(&seqSet, item, storeItems, nil); err != nil {
return fmt.Errorf("failed to add deleted flag: %v", err)
}
return nil
})
if err != nil {
return err
}
return ctx.Redirect(http.StatusFound, fmt.Sprintf("/message/%v/%v", url.PathEscape(mboxName), uid))
}