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Add basic message view

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This commit is contained in:
Simon Ser 2019-12-02 19:53:09 +01:00
parent fce17c9733
commit 25c63d0530
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GPG key ID: 0FDE7BE0E88F5E48
5 changed files with 211 additions and 9 deletions
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1
go.mod
View file

@ -4,5 +4,6 @@ go 1.13
require (
github.com/emersion/go-imap v1.0.1
github.com/emersion/go-message v0.10.4-0.20190609165112-592ace5bc1ca
github.com/labstack/echo/v4 v4.1.11
)

2
go.sum
View file

@ -3,9 +3,11 @@ github.com/dgrijalva/jwt-go v3.2.0+incompatible h1:7qlOGliEKZXTDg6OTjfoBKDXWrumC
github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
github.com/emersion/go-imap v1.0.1 h1:J3duplefIrglQtE63hCGYdGLgMjYWqHvkUUEbimbXY8=
github.com/emersion/go-imap v1.0.1/go.mod h1:MEiDDwwQFcZ+L45Pa68jNGv0qU9kbW+SJzwDpvSfX1s=
github.com/emersion/go-message v0.10.4-0.20190609165112-592ace5bc1ca h1:OYhqtJI4eOLvGtRIsUfP87VMJ1J/o6ks1tah9DlYkn4=
github.com/emersion/go-message v0.10.4-0.20190609165112-592ace5bc1ca/go.mod h1:3h+HsGTCFHmk4ngJ2IV/YPhdlaOcR6hcgqM3yca9v7c=
github.com/emersion/go-sasl v0.0.0-20190520160400-47d427600317 h1:tYZxAY8nu3JJQKios9f27Sbvbkfm4XHXT476gVtszu0=
github.com/emersion/go-sasl v0.0.0-20190520160400-47d427600317/go.mod h1:G/dpzLu16WtQpBfQ/z3LYiYJn3ZhKSGWn83fyoyQe/k=
github.com/emersion/go-textwrapper v0.0.0-20160606182133-d0e65e56babe h1:40SWqY0zE3qCi6ZrtTf5OUdNm5lDnGnjRSq9GgmeTrg=
github.com/emersion/go-textwrapper v0.0.0-20160606182133-d0e65e56babe/go.mod h1:aqO8z8wPrjkscevZJFVE1wXJrLpC5LtJG7fqLOsPb2U=
github.com/labstack/echo v3.3.10+incompatible h1:pGRcYk231ExFAyoAjAfD85kQzRJCRI8bbnE7CX5OEgg=
github.com/labstack/echo/v4 v4.1.11 h1:z0BZoArY4FqdpUEl+wlHp4hnr/oSR6MTmQmv8OHSoww=

155
imap.go
View file

@ -1,9 +1,16 @@
package koushin
import (
"bufio"
"fmt"
"io/ioutil"
"sort"
"strconv"
"strings"
"github.com/emersion/go-imap"
"github.com/emersion/go-message"
"github.com/emersion/go-message/textproto"
imapclient "github.com/emersion/go-imap/client"
)
@ -53,17 +60,91 @@ func listMailboxes(conn *imapclient.Client) ([]*imap.MailboxInfo, error) {
return mailboxes, nil
}
func listMessages(conn *imapclient.Client, mboxName string) ([]*imap.Message, error) {
func ensureMailboxSelected(conn *imapclient.Client, mboxName string) error {
mbox := conn.Mailbox()
if mbox == nil || mbox.Name != mboxName {
var err error
mbox, err = conn.Select(mboxName, false)
if err != nil {
return nil, err
if _, err := conn.Select(mboxName, false); err != nil {
return err
}
}
return nil
}
type imapMessage struct {
*imap.Message
}
func textPartPath(bs *imap.BodyStructure) ([]int, bool) {
if bs.Disposition != "" && !strings.EqualFold(bs.Disposition, "inline") {
return nil, false
}
if strings.EqualFold(bs.MIMEType, "text") {
return []int{1}, true
}
if !strings.EqualFold(bs.MIMEType, "multipart") {
return nil, false
}
textPartNum := -1
for i, part := range bs.Parts {
num := i + 1
if strings.EqualFold(part.MIMEType, "multipart") {
if subpath, ok := textPartPath(part); ok {
return append([]int{num}, subpath...), true
}
}
if !strings.EqualFold(part.MIMEType, "text") {
continue
}
var pick bool
switch strings.ToLower(part.MIMESubType) {
case "plain":
pick = true
case "html":
pick = textPartNum < 0
}
if pick {
textPartNum = num
}
}
if textPartNum > 0 {
return []int{textPartNum}, true
}
return nil, false
}
func (msg *imapMessage) TextPartName() string {
if msg.BodyStructure == nil {
return ""
}
path, ok := textPartPath(msg.BodyStructure)
if !ok {
return ""
}
l := make([]string, len(path))
for i, partNum := range path {
l[i] = strconv.Itoa(partNum)
}
return strings.Join(l, ".")
}
func listMessages(conn *imapclient.Client, mboxName string) ([]imapMessage, error) {
if err := ensureMailboxSelected(conn, mboxName); err != nil {
return nil, err
}
n := uint32(10)
mbox := conn.Mailbox()
from := uint32(1)
to := mbox.Messages
if mbox.Messages > n {
@ -72,15 +153,17 @@ func listMessages(conn *imapclient.Client, mboxName string) ([]*imap.Message, er
seqSet := new(imap.SeqSet)
seqSet.AddRange(from, to)
fetch := []imap.FetchItem{imap.FetchEnvelope, imap.FetchUid, imap.FetchBodyStructure}
ch := make(chan *imap.Message, 10)
done := make(chan error, 1)
go func() {
done <- conn.Fetch(seqSet, []imap.FetchItem{imap.FetchEnvelope}, ch)
done <- conn.Fetch(seqSet, fetch, ch)
}()
msgs := make([]*imap.Message, 0, n)
msgs := make([]imapMessage, 0, n)
for msg := range ch {
msgs = append(msgs, msg)
msgs = append(msgs, imapMessage{msg})
}
if err := <-done; err != nil {
@ -95,3 +178,59 @@ func listMessages(conn *imapclient.Client, mboxName string) ([]*imap.Message, er
return msgs, nil
}
var _ = message.Read
func getMessage(conn *imapclient.Client, mboxName string, uid uint32, partPath []int) (*imap.Message, string, error) {
if err := ensureMailboxSelected(conn, mboxName); err != nil {
return nil, "", err
}
seqSet := new(imap.SeqSet)
seqSet.AddNum(uid)
var textHeaderSection imap.BodySectionName
textHeaderSection.Peek = true
textHeaderSection.Specifier = imap.HeaderSpecifier
textHeaderSection.Path = partPath
var textBodySection imap.BodySectionName
textBodySection.Peek = true
textBodySection.Path = partPath
fetch := []imap.FetchItem{
imap.FetchEnvelope,
imap.FetchUid,
imap.FetchBodyStructure,
textHeaderSection.FetchItem(),
textBodySection.FetchItem(),
}
ch := make(chan *imap.Message, 1)
if err := conn.UidFetch(seqSet, fetch, ch); err != nil {
return nil, "", err
}
msg := <-ch
if msg == nil {
return nil, "", fmt.Errorf("server didn't return message")
}
headerReader := bufio.NewReader(msg.GetBody(&textHeaderSection))
h, err := textproto.ReadHeader(headerReader)
if err != nil {
return nil, "", err
}
text, err := message.New(message.Header{h}, msg.GetBody(&textBodySection))
if err != nil {
return nil, "", err
}
b, err := ioutil.ReadAll(text.Body)
if err != nil {
return nil, "", err
}
return msg, string(b), nil
}

6
public/mailbox.html
View file

@ -2,6 +2,8 @@
<h1>koushin</h1>
<h2>{{.Mailbox.Name}}</h2>
<p>Mailboxes:</p>
<ul>
{{range .Mailboxes}}
@ -12,7 +14,9 @@
<p>Messages:</p>
<ul>
{{range .Messages}}
<li>{{.Envelope.Subject}}</li>
<li><a href="/message/{{$.Mailbox.Name}}/{{.Uid}}?part={{.TextPartName}}">
{{.Envelope.Subject}}
</a></li>
{{end}}
</ul>

56
server.go
View file

@ -4,6 +4,8 @@ import (
"fmt"
"net/http"
"net/url"
"strconv"
"strings"
"time"
"github.com/labstack/echo/v4"
@ -94,6 +96,34 @@ func handleLogin(ectx echo.Context) error {
return ctx.Render(http.StatusOK, "login.html", nil)
}
func parseUid(s string) (uint32, error) {
uid, err := strconv.ParseUint(s, 10, 32)
if err != nil {
return 0, err
}
if uid == 0 {
return 0, fmt.Errorf("UID must be non-zero")
}
return uint32(uid), nil
}
func parsePartPath(s string) ([]int, error) {
l := strings.Split(s, ".")
path := make([]int, len(l))
for i, s := range l {
var err error
path[i], err = strconv.Atoi(s)
if err != nil {
return nil, err
}
if path[i] <= 0 {
return nil, fmt.Errorf("part num must be strictly positive")
}
}
return path, nil
}
func New(imapURL string) *echo.Echo {
e := echo.New()
@ -149,11 +179,37 @@ func New(imapURL string) *echo.Echo {
}
return ctx.Render(http.StatusOK, "mailbox.html", map[string]interface{}{
"Mailbox": ctx.conn.Mailbox(),
"Mailboxes": mailboxes,
"Messages": msgs,
})
})
e.GET("/message/:mbox/:uid", func(ectx echo.Context) error {
ctx := ectx.(*context)
uid, err := parseUid(ctx.Param("uid"))
if err != nil {
return echo.NewHTTPError(http.StatusBadRequest, err)
}
// TODO: handle messages without a text part
part, err := parsePartPath(ctx.QueryParam("part"))
if err != nil {
return echo.NewHTTPError(http.StatusBadRequest, err)
}
msg, body, err := getMessage(ctx.conn, ctx.Param("mbox"), uid, part)
if err != nil {
return err
}
return ctx.Render(http.StatusOK, "message.html", map[string]interface{}{
"Mailbox": ctx.conn.Mailbox(),
"Message": msg,
"Body": body,
})
})
e.GET("/login", handleLogin)
e.POST("/login", handleLogin)