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2022-08-21 18:41:35 +03:00
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/local.db

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stages:
- test
- release
lint:
stage: test
only: ['main']
image: registry.gitlab.com/etke.cc/base
script:
- make lint
unit:
stage: test
only: ['main']
image: registry.gitlab.com/etke.cc/base
script:
- make test
docker:
stage: release
only: ['main', 'tags']
services:
- docker:dind
image: jdrouet/docker-with-buildx:stable
before_script:
- apk --no-cache add make
script:
- make login docker
tags:
- docker

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run:
concurrency: 4
timeout: 5m
issues-exit-code: 1
tests: true
build-tags: []
skip-dirs: []
skip-dirs-use-default: true
skip-files: []
modules-download-mode: readonly
allow-parallel-runners: false
output:
format: colored-line-number
print-issued-lines: true
print-linter-name: true
uniq-by-line: true
path-prefix: ""
sort-results: true
linters-settings:
errcheck:
check-blank: true
gocognit:
min-complexity: 15
nestif:
min-complexity: 4
gocritic:
enabled-tags:
- performance
gofumpt:
lang-version: "1.18"
gosimple:
go: "1.18"
checks: [ "all" ]
govet:
check-shadowing: true
enable:
- atomicalign
- shadow
misspell:
locale: US
staticcheck:
go: "1.18"
checks: [ "all" ]
stylecheck:
go: "1.18"
unparam:
check-exported: true
unused:
go: "1.18"
gci:
sections:
- standard
- default
- prefix(gitlab.com/etke.cc/int/scheduler)
section-separators:
- newLine
linters:
disable-all: false
enable:
- megacheck
- govet
- errcheck
- gci
- gocognit
- nestif
# - gocritic # ref: https://github.com/golangci/golangci-lint/issues/2649#issue-1170906525
- gofumpt
- goimports
- gosimple
- govet
- misspell
- staticcheck
- stylecheck
- unparam
- unused
fast: false
issues:
exclude-rules:
- path: _test\.go
linters:
- gocyclo
- errcheck
- dupl
- gosec
- linters:
- staticcheck
text: "SA9003:"
- linters:
- lll
source: "^//go:generate "
max-issues-per-linter: 0
max-same-issues: 0
new: false

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FROM registry.gitlab.com/etke.cc/base AS builder
WORKDIR /scheduler
COPY . .
RUN make build && \
git clone https://gitlab.com/etke.cc/int/ansible-injector.git && \
cd ansible-injector && \
make build
FROM alpine:latest
ENV SCHEDULER_DB_DSN /data/scheduler.db
RUN apk --no-cache add ca-certificates tzdata olm ansible-core && update-ca-certificates && \
adduser -D -g '' scheduler && \
mkdir /data && chown -R scheduler /data
COPY --from=builder /scheduler/scheduler /bin/scheduler
COPY --from=builder /scheduler/ansible-injector/ansible-injector /bin/ansible-injector
USER scheduler
ENTRYPOINT ["/bin/scheduler"]

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LICENSE.md Normal file
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author or copyright holder as a result of your choosing to follow a
later version.
15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
16. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

53
Makefile Normal file
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### CI vars
CI_LOGIN_COMMAND = @echo "Not a CI, skip login"
CI_REGISTRY_IMAGE ?= registry.gitlab.com/etke.cc/postmoogle
CI_COMMIT_TAG ?= latest
# for main branch it must be set explicitly
ifeq ($(CI_COMMIT_TAG), main)
CI_COMMIT_TAG = latest
endif
# login command
ifdef CI_JOB_TOKEN
CI_LOGIN_COMMAND = @docker login -u gitlab-ci-token -p $(CI_JOB_TOKEN) $(CI_REGISTRY)
endif
# update go dependencies
update:
go get ./cmd
go mod tidy
go mod verify
mock:
-@rm -rf mocks
@mockery --all
# run linter
lint:
golangci-lint run ./...
# run linter and fix issues if possible
lintfix:
golangci-lint run --fix ./...
# run unit tests
test:
@go test -coverprofile=cover.out ./...
@go tool cover -func=cover.out
-@rm -f cover.out
# note: make doesn't understand exit code 130 and sets it == 1
run:
@go run ./cmd || exit 0
build:
go build -v -o postmoogle ./cmd
# CI: docker login
login:
@echo "trying to login to docker registry..."
$(CI_LOGIN_COMMAND)
# docker build
docker:
docker build -t ${CI_REGISTRY_IMAGE}:${CI_COMMIT_TAG} .
docker push ${CI_REGISTRY_IMAGE}:${CI_COMMIT_TAG}

36
README.md Normal file
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# Postmoogle
An Email to Matrix bridge
## Features / Roadmap / TODO
- [ ] SMTP server
- [ ] SMTP client
- [x] Matrix bot
- [x] Configuration in room's account data
- [ ] Receive emails to matrix rooms
- [ ] Map email threads to matrix threads
- [ ] Reply to matrix thread sends reply into email thread
- [ ] Send a message to matrix room with special format to send a new email
## Configuration
env vars
### mandatory
* **POSTMOOGLE_HOMESERVER** - homeserver url, eg: `https://matrix.example.com`
* **POSTMOOGLE_LOGIN** - user login/localpart, eg: `scheduler`
* **POSTMOOGLE_PASSWORD** - user password
* **POSTMOOGLE_DOMAIN** - SMTP domain to listen for new emails
* **POSTMOOGLE_PORT** - SMTP port to listen for new emails
### optional
* **POSTMOOGLE_SENTRY_DSN** - sentry DSN
* **POSTMOOGLE_SENTRY_RATE** - sentry sample rate, from 0 to 100 (default: 20)
* **POSTMOOGLE_LOGLEVEL** - log level
* **POSTMOOGLE_DB_DSN** - database connection string
* **POSTMOOGLE_DB_DIALECT** - database dialect (postgres, sqlite3)
You can find default values in [config/defaults.go](config/defaults.go)

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bot/bot.go Normal file
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package bot
import (
"context"
"fmt"
"github.com/getsentry/sentry-go"
"gitlab.com/etke.cc/go/logger"
"gitlab.com/etke.cc/linkpearl"
"maunium.net/go/mautrix/event"
"maunium.net/go/mautrix/id"
)
// Bot represents matrix bot
type Bot struct {
prefix string
domain string
log *logger.Logger
lp *linkpearl.Linkpearl
}
// New creates a new matrix bot
func New(lp *linkpearl.Linkpearl, log *logger.Logger, prefix, domain string) *Bot {
return &Bot{
prefix: prefix,
domain: domain,
log: log,
lp: lp,
}
}
// Error message to the log and matrix room
func (b *Bot) Error(ctx context.Context, roomID id.RoomID, message string, args ...interface{}) {
b.log.Error(message, args...)
if sentry.HasHubOnContext(ctx) {
sentry.GetHubFromContext(ctx).CaptureException(fmt.Errorf(message, args...))
} else {
sentry.CaptureException(fmt.Errorf(message, args...))
}
if roomID != "" {
// nolint // if something goes wrong here nobody can help...
b.lp.Send(roomID, &event.MessageEventContent{
MsgType: event.MsgNotice,
Body: "ERROR: " + fmt.Sprintf(message, args...),
})
}
}
// Start performs matrix /sync
func (b *Bot) Start() error {
if err := b.migrate(); err != nil {
return err
}
if err := b.lp.GetClient().SetPresence(event.PresenceOnline); err != nil {
return err
}
b.initSync()
b.log.Info("Postmoogle has been started")
return b.lp.GetClient().Sync()
}
// Stop the bot
func (b *Bot) Stop() {
err := b.lp.GetClient().SetPresence(event.PresenceOffline)
if err != nil {
b.log.Error("cannot set presence = offline: %v", err)
}
b.lp.GetClient().StopSync()
}

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bot/command.go Normal file
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package bot
import (
"context"
"strings"
"github.com/getsentry/sentry-go"
"maunium.net/go/mautrix/event"
"maunium.net/go/mautrix/format"
"maunium.net/go/mautrix/id"
)
var commands = map[string]string{
"mailbox": "Get or set mailbox of that room",
"help": "Get help",
}
func (b *Bot) handleCommand(ctx context.Context, evt *event.Event, command []string) {
if _, ok := commands[command[0]]; !ok {
return
}
switch command[0] {
case "help":
b.sendHelp(ctx, evt.RoomID)
case "mailbox":
b.handleMailbox(ctx, evt, command)
}
}
func (b *Bot) parseCommand(message string) []string {
if message == "" {
return nil
}
message = strings.Replace(message, b.prefix+" ", "", 1)
return strings.Split(message, " ")
}
func (b *Bot) sendHelp(ctx context.Context, roomID id.RoomID) {
span := sentry.StartSpan(ctx, "http.server", sentry.TransactionName("sendHelp"))
defer span.Finish()
var msg strings.Builder
msg.WriteString("the following commands are supported:\n\n")
for name, desc := range commands {
msg.WriteString("* **")
msg.WriteString(name)
msg.WriteString("** - ")
msg.WriteString(desc)
msg.WriteString("\n")
}
content := format.RenderMarkdown(msg.String(), true, true)
content.MsgType = event.MsgNotice
_, err := b.lp.Send(roomID, content)
if err != nil {
b.Error(span.Context(), roomID, "cannot send message: %v", err)
}
}

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bot/data.go Normal file
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package bot
import (
"context"
"github.com/getsentry/sentry-go"
"maunium.net/go/mautrix/id"
)
const settingskey = "cc.etke.postmoogle.settings"
var migrations = []string{
`
CREATE TABLE IF NOT EXISTS settings (
room_id VARCHAR(255),
mailbox VARCHAR(255)
)
`,
}
// settings of a room
type settings struct {
Mailbox string
}
func (b *Bot) migrate() error {
b.log.Debug("migrating database...")
tx, beginErr := b.lp.GetDB().Begin()
if beginErr != nil {
b.log.Error("cannot begin transaction: %v", beginErr)
return beginErr
}
for _, query := range migrations {
_, execErr := tx.Exec(query)
if execErr != nil {
b.log.Error("cannot apply migration: %v", execErr)
// nolint // we already have the execErr to return
tx.Rollback()
return execErr
}
}
commitErr := tx.Commit()
if commitErr != nil {
b.log.Error("cannot commit transaction: %v", commitErr)
// nolint // we already have the commitErr to return
tx.Rollback()
return commitErr
}
return nil
}
func (b *Bot) getSettings(ctx context.Context, roomID id.RoomID) (*settings, error) {
span := sentry.StartSpan(ctx, "http.server", sentry.TransactionName("getSettings"))
defer span.Finish()
var config settings
query := "SELECT * FROM settings WHERE room_id = "
switch b.lp.GetStore().GetDialect() {
case "postgres":
query += "$1"
case "sqlite3":
query += "?"
}
row := b.lp.GetDB().QueryRow(query, roomID)
err := row.Scan(&config.Mailbox)
if err == nil {
return &config, nil
}
b.log.Error("cannot find settings in database: %v", err)
err = b.lp.GetClient().GetRoomAccountData(roomID, settingskey, &config)
return &config, err
}
func (b *Bot) setSettings(ctx context.Context, roomID id.RoomID, cfg *settings) error {
span := sentry.StartSpan(ctx, "http.server", sentry.TransactionName("setSettings"))
defer span.Finish()
tx, err := b.lp.GetDB().Begin()
if err == nil {
var insert string
switch b.lp.GetStore().GetDialect() {
case "postgres":
insert = "INSERT INTO settings VALUES ($1) ON CONFLICT (room_id) DO UPDATE SET mailbox = $1"
case "sqlite3":
insert = "INSERT INTO settings VALUES (?) ON CONFLICT (room_id) DO UPDATE SET mailbox = ?"
}
_, err = tx.Exec(insert, cfg.Mailbox)
if err != nil {
b.log.Error("cannot insert settigs: %v", err)
// nolint // no need to check error here
tx.Rollback()
}
if err != nil {
err = tx.Commit()
if err != nil {
b.log.Error("cannot commit transaction: %v", err)
}
}
}
return b.lp.GetClient().SetRoomAccountData(roomID, settingskey, cfg)
}
// FindRoomID by mailbox
func (b *Bot) FindRoomID(mailbox string) (id.RoomID, error) {
query := "SELECT room_id FROM settings WHERE mailbox = "
switch b.lp.GetStore().GetDialect() {
case "postgres":
query += "$1"
case "sqlite3":
query += "?"
}
var roomID string
row := b.lp.GetDB().QueryRow(query, mailbox)
err := row.Scan(&roomID)
return id.RoomID(roomID), err
}

66
bot/mailbox.go Normal file
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package bot
import (
"context"
"github.com/getsentry/sentry-go"
"maunium.net/go/mautrix/event"
"maunium.net/go/mautrix/format"
)
func (b *Bot) handleMailbox(ctx context.Context, evt *event.Event, command []string) {
if len(command) == 1 {
b.getMailbox(ctx, evt)
return
}
b.setMailbox(ctx, evt, command[1])
}
func (b *Bot) getMailbox(ctx context.Context, evt *event.Event) {
span := sentry.StartSpan(ctx, "http.server", sentry.TransactionName("getMailbox"))
defer span.Finish()
cfg, err := b.getSettings(span.Context(), evt.RoomID)
if err != nil || cfg == nil {
b.Error(span.Context(), evt.RoomID, "cannot get settings: %v", err)
return
}
if cfg.Mailbox == "" {
b.Error(span.Context(), evt.RoomID, "mailbox name is not set")
return
}
content := format.RenderMarkdown("Mailbox of this room is **"+cfg.Mailbox+"@"+b.domain+"**", true, true)
content.MsgType = event.MsgNotice
_, err = b.lp.Send(evt.RoomID, content)
if err != nil {
b.Error(span.Context(), evt.RoomID, "cannot send message: %v", err)
}
}
func (b *Bot) setMailbox(ctx context.Context, evt *event.Event, mailbox string) {
span := sentry.StartSpan(ctx, "http.server", sentry.TransactionName("setMailbox"))
defer span.Finish()
cfg, err := b.getSettings(span.Context(), evt.RoomID)
if err != nil {
b.log.Warn("cannot get settings: %v", err)
}
if cfg == nil {
cfg = &settings{}
}
cfg.Mailbox = mailbox
err = b.setSettings(span.Context(), evt.RoomID, cfg)
if err != nil {
b.Error(span.Context(), evt.RoomID, "cannot update settings: %v", err)
return
}
content := format.RenderMarkdown("Mailbox of this room set to **"+cfg.Mailbox+"@"+b.domain+"**", true, true)
content.MsgType = event.MsgNotice
_, err = b.lp.Send(evt.RoomID, content)
if err != nil {
b.Error(span.Context(), evt.RoomID, "cannot send message: %v", err)
}
}

23
bot/message.go Normal file
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package bot
import (
"context"
"strings"
"maunium.net/go/mautrix/event"
)
func (b *Bot) handle(ctx context.Context, evt *event.Event) {
content := evt.Content.AsMessage()
if content == nil {
b.Error(ctx, evt.RoomID, "cannot read message")
return
}
message := strings.TrimSpace(content.Body)
command := b.parseCommand(message)
if command == nil {
return
}
b.handleCommand(ctx, evt, command)
}

72
bot/sync.go Normal file
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package bot
import (
"context"
"github.com/getsentry/sentry-go"
"maunium.net/go/mautrix"
"maunium.net/go/mautrix/event"
)
func (b *Bot) initSync() {
b.lp.OnEventType(
event.EventMessage,
func(_ mautrix.EventSource, evt *event.Event) {
go b.onMessage(evt)
})
b.lp.OnEventType(
event.EventEncrypted,
func(_ mautrix.EventSource, evt *event.Event) {
go b.onEncryptedMessage(evt)
})
}
func (b *Bot) onMessage(evt *event.Event) {
// ignore own messages
if evt.Sender == b.lp.GetClient().UserID {
return
}
hub := sentry.CurrentHub().Clone()
hub.ConfigureScope(func(scope *sentry.Scope) {
scope.SetUser(sentry.User{ID: evt.Sender.String()})
scope.SetContext("event", map[string]string{
"id": evt.ID.String(),
"room": evt.RoomID.String(),
"sender": evt.Sender.String(),
})
})
ctx := sentry.SetHubOnContext(context.Background(), hub)
span := sentry.StartSpan(ctx, "http.server", sentry.TransactionName("onMessage"))
defer span.Finish()
b.handle(span.Context(), evt)
}
func (b *Bot) onEncryptedMessage(evt *event.Event) {
// ignore own messages
if evt.Sender == b.lp.GetClient().UserID {
return
}
hub := sentry.CurrentHub().Clone()
hub.ConfigureScope(func(scope *sentry.Scope) {
scope.SetUser(sentry.User{ID: evt.Sender.String()})
scope.SetContext("event", map[string]string{
"id": evt.ID.String(),
"room": evt.RoomID.String(),
"sender": evt.Sender.String(),
})
})
ctx := sentry.SetHubOnContext(context.Background(), hub)
span := sentry.StartSpan(ctx, "http.server", sentry.TransactionName("onMessage"))
defer span.Finish()
decrypted, err := b.lp.GetMachine().DecryptMegolmEvent(evt)
if err != nil {
b.Error(span.Context(), evt.RoomID, "cannot decrypt a message: %v", err)
return
}
b.handle(span.Context(), decrypted)
}

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cmd/cmd.go Normal file
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package main
import (
"database/sql"
"os"
"os/signal"
"syscall"
"time"
"github.com/getsentry/sentry-go"
_ "github.com/lib/pq"
_ "github.com/mattn/go-sqlite3"
"gitlab.com/etke.cc/go/logger"
"gitlab.com/etke.cc/linkpearl"
lpcfg "gitlab.com/etke.cc/linkpearl/config"
"gitlab.com/etke.cc/postmoogle/bot"
"gitlab.com/etke.cc/postmoogle/config"
"gitlab.com/etke.cc/postmoogle/smtp"
"maunium.net/go/mautrix/id"
)
var (
mxb *bot.Bot
log *logger.Logger
)
func main() {
quit := make(chan struct{})
cfg := config.New()
log = logger.New("postmoogle.", cfg.LogLevel)
log.Info("#############################")
log.Info("Postmoogle")
log.Info("Matrix: true")
log.Info("#############################")
log.Debug("starting internal components...")
initSentry(cfg)
initBot(cfg)
initShutdown(quit)
defer recovery()
smtp.NewServer(cfg.Domain, map[string]id.RoomID{}, cfg.Port)
log.Debug("starting matrix bot...")
err := mxb.Start()
if err != nil {
//nolint:gocritic
log.Fatal("cannot start the bot: %v", err)
}
<-quit
}
func initSentry(cfg *config.Config) {
err := sentry.Init(sentry.ClientOptions{
Dsn: cfg.Sentry.DSN,
AttachStacktrace: true,
TracesSampleRate: float64(cfg.Sentry.SampleRate) / 100,
})
if err != nil {
log.Fatal("cannot initialize sentry: %v", err)
}
}
func initBot(cfg *config.Config) {
db, err := sql.Open(cfg.DB.Dialect, cfg.DB.DSN)
if err != nil {
log.Fatal("cannot initialize SQL database: %v", err)
}
mxlog := logger.New("matrix.", cfg.LogLevel)
lp, err := linkpearl.New(&lpcfg.Config{
Homeserver: cfg.Homeserver,
Login: cfg.Login,
Password: cfg.Password,
DB: db,
Dialect: cfg.DB.Dialect,
NoEncryption: cfg.NoEncryption,
LPLogger: mxlog,
APILogger: logger.New("api.", cfg.LogLevel),
StoreLogger: logger.New("store.", cfg.LogLevel),
CryptoLogger: logger.New("olm.", cfg.LogLevel),
})
if err != nil {
// nolint // Fatal = panic, not os.Exit()
log.Fatal("cannot initialize matrix bot: %v", err)
}
mxb = bot.New(lp, mxlog, cfg.Prefix, cfg.Domain)
log.Debug("bot has been created")
}
func initShutdown(quit chan struct{}) {
listener := make(chan os.Signal, 1)
signal.Notify(listener, os.Interrupt, syscall.SIGABRT, syscall.SIGHUP, syscall.SIGINT, syscall.SIGQUIT, syscall.SIGTERM)
go func() {
<-listener
defer close(quit)
shutdown()
}()
}
func shutdown() {
log.Info("Shutting down...")
mxb.Stop()
sentry.Flush(5 * time.Second)
log.Info("Postmoogle has been stopped")
os.Exit(0)
}
func recovery() {
defer shutdown()
err := recover()
// no problem just shutdown
if err == nil {
sentry.CurrentHub().Recover(err)
}
}

31
config/config.go Normal file
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package config
import (
"gitlab.com/etke.cc/go/env"
)
const prefix = "postmoogle"
// New config
func New() *Config {
env.SetPrefix(prefix)
cfg := &Config{
Homeserver: env.String("homeserver", defaultConfig.Homeserver),
Login: env.String("login", defaultConfig.Login),
Password: env.String("password", defaultConfig.Password),
Domain: env.String("domain", defaultConfig.Domain),
Port: env.String("port", defaultConfig.Port),
NoEncryption: env.Bool("noencryption"),
Sentry: Sentry{
DSN: env.String("sentry.dsn", defaultConfig.Sentry.DSN),
SampleRate: env.Int("sentry.rate", defaultConfig.Sentry.SampleRate),
},
LogLevel: env.String("loglevel", defaultConfig.LogLevel),
DB: DB{
DSN: env.String("db.dsn", defaultConfig.DB.DSN),
Dialect: env.String("db.dialect", defaultConfig.DB.Dialect),
},
}
return cfg
}

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config/defaults.go Normal file
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package config
var defaultConfig = &Config{
LogLevel: "INFO",
Domain: "localhost",
Port: "25",
Prefix: "!pm",
DB: DB{
DSN: "/tmp/postmoogle.db",
Dialect: "sqlite3",
},
Sentry: Sentry{
SampleRate: 20,
},
}

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config/types.go Normal file
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package config
// Config of Postmoogle
type Config struct {
// Homeserver url
Homeserver string
// Login is a MXID localpart (scheduler - OK, @scheduler:example.com - wrong)
Login string
// Password for login/password auth only
Password string
// Domain for SMTP
Domain string
// Port for SMTP
Port string
// RoomID of the admin room
LogLevel string
// NoEncryption disabled encryption support
NoEncryption bool
// Prefix for commands
Prefix string
// DB config
DB DB
// Sentry config
Sentry Sentry
}
// DB config
type DB struct {
// DSN is a database connection string
DSN string
// Dialect of database, one of sqlite3, postgres
Dialect string
}
// Sentry config
type Sentry struct {
DSN string
SampleRate int
}

34
go.mod Normal file
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module gitlab.com/etke.cc/postmoogle
go 1.18
require (
github.com/getsentry/sentry-go v0.13.0
github.com/lib/pq v1.10.6
github.com/mattn/go-sqlite3 v1.14.14
gitlab.com/etke.cc/go/env v1.0.0
gitlab.com/etke.cc/go/logger v1.0.0
gitlab.com/etke.cc/linkpearl v0.0.0-20220816155856-8f4cd5cce574
maunium.net/go/mautrix v0.12.0
)
require (
github.com/emersion/go-sasl v0.0.0-20200509203442-7bfe0ed36a21 // indirect
github.com/emersion/go-smtp v0.15.0 // indirect
github.com/google/go-cmp v0.5.8 // indirect
github.com/gorilla/mux v1.8.0 // indirect
github.com/gorilla/websocket v1.5.0 // indirect
github.com/mattn/go-colorable v0.1.13 // indirect
github.com/mattn/go-isatty v0.0.16 // indirect
github.com/rs/zerolog v1.27.0 // indirect
github.com/tidwall/gjson v1.14.3 // indirect
github.com/tidwall/match v1.1.1 // indirect
github.com/tidwall/pretty v1.2.0 // indirect
github.com/tidwall/sjson v1.2.5 // indirect
github.com/yuin/goldmark v1.4.12 // indirect
golang.org/x/crypto v0.0.0-20220817201139-bc19a97f63c8 // indirect
golang.org/x/net v0.0.0-20220812174116-3211cb980234 // indirect
golang.org/x/sys v0.0.0-20220818161305-2296e01440c6 // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect
maunium.net/go/maulogger/v2 v2.3.2 // indirect
)

69
go.sum Normal file
View File

@@ -0,0 +1,69 @@
github.com/DATA-DOG/go-sqlmock v1.5.0 h1:Shsta01QNfFxHCfpW6YH2STWB0MudeXXEWMr20OEh60=
github.com/coreos/go-systemd/v22 v22.3.3-0.20220203105225-a9a7ef127534/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/emersion/go-sasl v0.0.0-20200509203442-7bfe0ed36a21 h1:OJyUGMJTzHTd1XQp98QTaHernxMYzRaOasRir9hUlFQ=
github.com/emersion/go-sasl v0.0.0-20200509203442-7bfe0ed36a21/go.mod h1:iL2twTeMvZnrg54ZoPDNfJaJaqy0xIQFuBdrLsmspwQ=
github.com/emersion/go-smtp v0.15.0 h1:3+hMGMGrqP/lqd7qoxZc1hTU8LY8gHV9RFGWlqSDmP8=
github.com/emersion/go-smtp v0.15.0/go.mod h1:qm27SGYgoIPRot6ubfQ/GpiPy/g3PaZAVRxiO/sDUgQ=
github.com/getsentry/sentry-go v0.13.0 h1:20dgTiUSfxRB/EhMPtxcL9ZEbM1ZdR+W/7f7NWD+xWo=
github.com/getsentry/sentry-go v0.13.0/go.mod h1:EOsfu5ZdvKPfeHYV6pTVQnsjfp30+XA7//UooKNumH0=
github.com/go-errors/errors v1.0.1 h1:LUHzmkK3GUKUrL/1gfBUxAHzcev3apQlezX/+O7ma6w=
github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
github.com/google/go-cmp v0.5.8 h1:e6P7q2lk1O+qJJb4BtCQXlK8vWEO8V1ZeuEdJNOqZyg=
github.com/google/go-cmp v0.5.8/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
github.com/gorilla/mux v1.8.0 h1:i40aqfkR1h2SlN9hojwV5ZA91wcXFOvkdNIeFDP5koI=
github.com/gorilla/mux v1.8.0/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
github.com/gorilla/websocket v1.5.0 h1:PPwGk2jz7EePpoHN/+ClbZu8SPxiqlu12wZP/3sWmnc=
github.com/gorilla/websocket v1.5.0/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
github.com/lib/pq v1.10.6 h1:jbk+ZieJ0D7EVGJYpL9QTz7/YW6UHbmdnZWYyK5cdBs=
github.com/lib/pq v1.10.6/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
github.com/mattn/go-colorable v0.1.12/go.mod h1:u5H1YNBxpqRaxsYJYSkiCWKzEfiAb1Gb520KVy5xxl4=
github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=
github.com/mattn/go-isatty v0.0.16 h1:bq3VjFmv/sOjHtdEhmkEV4x1AJtvUvOJ2PFAZ5+peKQ=
github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
github.com/mattn/go-sqlite3 v1.14.14 h1:qZgc/Rwetq+MtyE18WhzjokPD93dNqLGNT3QJuLvBGw=
github.com/mattn/go-sqlite3 v1.14.14/go.mod h1:NyWgC/yNuGj7Q9rpYnZvas74GogHl5/Z4A/KQRfk6bU=
github.com/pingcap/errors v0.11.4 h1:lFuQV/oaUMGcD2tqt+01ROSmJs75VG1ToEOkZIZ4nE4=
github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/rs/xid v1.3.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
github.com/rs/zerolog v1.27.0 h1:1T7qCieN22GVc8S4Q2yuexzBb1EqjbgjSH9RohbMjKs=
github.com/rs/zerolog v1.27.0/go.mod h1:7frBqO0oezxmnO7GF86FY++uy8I0Tk/If5ni1G9Qc0U=
github.com/stretchr/testify v1.8.0 h1:pSgiaMZlXftHpm5L7V1+rVB+AZJydKsMxsQBIJw4PKk=
github.com/tidwall/gjson v1.14.2/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
github.com/tidwall/gjson v1.14.3 h1:9jvXn7olKEHU1S9vwoMGliaT8jq1vJ7IH/n9zD9Dnlw=
github.com/tidwall/gjson v1.14.3/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
github.com/tidwall/match v1.1.1 h1:+Ho715JplO36QYgwN9PGYNhgZvoUSc9X2c80KVTi+GA=
github.com/tidwall/match v1.1.1/go.mod h1:eRSPERbgtNPcGhD8UCthc6PmLEQXEWd3PRB5JTxsfmM=
github.com/tidwall/pretty v1.2.0 h1:RWIZEg2iJ8/g6fDDYzMpobmaoGh5OLl4AXtGUGPcqCs=
github.com/tidwall/pretty v1.2.0/go.mod h1:ITEVvHYasfjBbM0u2Pg8T2nJnzm8xPwvNhhsoaGGjNU=
github.com/tidwall/sjson v1.2.5 h1:kLy8mja+1c9jlljvWTlSazM7cKDRfJuR/bOJhcY5NcY=
github.com/tidwall/sjson v1.2.5/go.mod h1:Fvgq9kS/6ociJEDnK0Fk1cpYF4FIW6ZF7LAe+6jwd28=
github.com/yuin/goldmark v1.4.12 h1:6hffw6vALvEDqJ19dOJvJKOoAOKe4NDaTqvd2sktGN0=
github.com/yuin/goldmark v1.4.12/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
gitlab.com/etke.cc/go/env v1.0.0 h1:J98BwzOuELnjsVPFvz5wa79L7IoRV9CmrS41xLYXtSw=
gitlab.com/etke.cc/go/env v1.0.0/go.mod h1:e1l4RM5MA1sc0R1w/RBDAESWRwgo5cOG9gx8BKUn2C4=
gitlab.com/etke.cc/go/logger v1.0.0 h1:vp8omRMhYn+/peIlHFf9AK7GlTnQQurDCIall3N88b0=
gitlab.com/etke.cc/go/logger v1.0.0/go.mod h1:8Vw5HFXlZQ5XeqvUs5zan+GnhrQyYtm/xe+yj8H/0zk=
gitlab.com/etke.cc/linkpearl v0.0.0-20220816155856-8f4cd5cce574 h1:9uWcP8vME9gPJpfHaRcnfERws4oBn1DVin2BTXKh5iw=
gitlab.com/etke.cc/linkpearl v0.0.0-20220816155856-8f4cd5cce574/go.mod h1:CqwzwxVogKG6gDWTPTen3NyWbTESg42jxoTfXXwDGKQ=
golang.org/x/crypto v0.0.0-20220817201139-bc19a97f63c8 h1:GIAS/yBem/gq2MUqgNIzUHW7cJMmx3TGZOrnyYaNQ6c=
golang.org/x/crypto v0.0.0-20220817201139-bc19a97f63c8/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
golang.org/x/net v0.0.0-20220812174116-3211cb980234 h1:RDqmgfe7SvlMWoqC3xwQ2blLO3fcWcxMa3eBLRdRW7E=
golang.org/x/net v0.0.0-20220812174116-3211cb980234/go.mod h1:YDH+HFinaLZZlnHAfSS6ZXJJ9M9t4Dl22yv3iI2vPwk=
golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220818161305-2296e01440c6 h1:Sx/u41w+OwrInGdEckYmEuU5gHoGSL4QbDz3S9s6j4U=
golang.org/x/sys v0.0.0-20220818161305-2296e01440c6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
maunium.net/go/maulogger/v2 v2.3.2 h1:1XmIYmMd3PoQfp9J+PaHhpt80zpfmMqaShzUTC7FwY0=
maunium.net/go/maulogger/v2 v2.3.2/go.mod h1:TYWy7wKwz/tIXTpsx8G3mZseIRiC5DoMxSZazOHy68A=
maunium.net/go/mautrix v0.12.0 h1:jyT1TkJBIRJ7+OW7NhmMHmnEEBLsQe9ml+FYwSLhlaU=
maunium.net/go/mautrix v0.12.0/go.mod h1:hHvNi5iKVAiI2MAdAeXHtP4g9BvNEX2rsQpSF/x6Kx4=

50
smtp/server.go Normal file
View File

@@ -0,0 +1,50 @@
package smtp
import (
"log"
"os"
"time"
"github.com/emersion/go-smtp"
"maunium.net/go/mautrix/id"
)
type backend struct {
domain string
rooms map[string]id.RoomID
}
func (b *backend) newSession() *session {
return &session{
domain: b.domain,
rooms: b.rooms,
}
}
func (b *backend) Login(state *smtp.ConnectionState, username, password string) (smtp.Session, error) {
return nil, smtp.ErrAuthUnsupported
}
func (b *backend) AnonymousLogin(state *smtp.ConnectionState) (smtp.Session, error) {
return b.newSession(), nil
}
func NewServer(domain string, mapping map[string]id.RoomID, port string) *smtp.Server {
be := &backend{
domain: domain,
rooms: mapping,
}
s := smtp.NewServer(be)
s.Addr = ":" + port
s.Domain = domain
s.AuthDisabled = true
s.ReadTimeout = 360 * time.Second
s.WriteTimeout = 360 * time.Second
s.MaxMessageBytes = 63 * 1024
s.MaxRecipients = 50
s.Debug = os.Stdout
log.Println("Starting SMTP server")
log.Fatal(s.ListenAndServe())
return s
}

47
smtp/session.go Normal file
View File

@@ -0,0 +1,47 @@
package smtp
import (
"io"
"log"
"github.com/emersion/go-smtp"
"maunium.net/go/mautrix/id"
)
type session struct {
domain string
rooms map[string]id.RoomID
}
func (s *session) Mail(from string, opts smtp.MailOptions) error {
log.Println("mail from", from)
return nil
}
func (s *session) Rcpt(to string) error {
_, ok := s.rooms[to]
if !ok {
return smtp.ErrAuthRequired
}
if Domain(to) != s.domain {
return smtp.ErrAuthRequired
}
log.Println("rcpt to", to)
return nil
}
func (s *session) Data(r io.Reader) error {
b, err := io.ReadAll(r)
if err != nil {
return err
}
log.Println("Data", string(b))
return nil
}
func (s *session) Reset() {}
func (s *session) Logout() error {
return nil
}

7
smtp/utils.go Normal file
View File

@@ -0,0 +1,7 @@
package smtp
import "strings"
func Domain(email string) string {
return email[strings.LastIndex(email, "@")+1:]
}