mautrix-whatsapp/provisioning.go

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2020-02-09 19:32:14 +01:00
// mautrix-whatsapp - A Matrix-WhatsApp puppeting bridge.
// Copyright (C) 2020 Tulir Asokan
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package main
import (
"context"
"encoding/json"
"fmt"
"net/http"
"strings"
"github.com/Rhymen/go-whatsapp"
"github.com/gorilla/websocket"
log "maunium.net/go/maulogger/v2"
whatsappExt "maunium.net/go/mautrix-whatsapp/whatsapp-ext"
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"maunium.net/go/mautrix/id"
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)
type ProvisioningAPI struct {
bridge *Bridge
log log.Logger
}
func (prov *ProvisioningAPI) Init() {
prov.log = prov.bridge.Log.Sub("Provisioning")
prov.log.Debugln("Enabling provisioning API at", prov.bridge.Config.AppService.Provisioning.Prefix)
r := prov.bridge.AS.Router.PathPrefix(prov.bridge.Config.AppService.Provisioning.Prefix).Subrouter()
r.Use(prov.AuthMiddleware)
r.HandleFunc("/ping", prov.Ping).Methods(http.MethodGet)
r.HandleFunc("/login", prov.Login)
r.HandleFunc("/logout", prov.Logout).Methods(http.MethodPost)
r.HandleFunc("/delete_session", prov.DeleteSession).Methods(http.MethodPost)
r.HandleFunc("/delete_connection", prov.DeleteConnection).Methods(http.MethodPost)
r.HandleFunc("/disconnect", prov.Disconnect).Methods(http.MethodPost)
r.HandleFunc("/reconnect", prov.Reconnect).Methods(http.MethodPost)
}
func (prov *ProvisioningAPI) AuthMiddleware(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
auth := r.Header.Get("Authorization")
auth = auth[len("Bearer "):]
if auth != prov.bridge.Config.AppService.Provisioning.SharedSecret {
jsonResponse(w, http.StatusForbidden, map[string]interface{}{
"error": "Invalid auth token",
"errcode": "M_FORBIDDEN",
})
return
}
userID := r.URL.Query().Get("user_id")
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user := prov.bridge.GetUserByMXID(id.UserID(userID))
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h.ServeHTTP(w, r.WithContext(context.WithValue(r.Context(), "user", user)))
})
}
type Error struct {
Success bool `json:"success"`
Error string `json:"error"`
ErrCode string `json:"errcode"`
}
type Response struct {
Success bool `json:"success"`
Status string `json:"status"`
}
func (prov *ProvisioningAPI) DeleteSession(w http.ResponseWriter, r *http.Request) {
user := r.Context().Value("user").(*User)
if user.Session == nil && user.Conn == nil {
jsonResponse(w, http.StatusNotFound, Error{
Error: "Nothing to purge: no session information stored and no active connection.",
ErrCode: "no session",
})
return
}
user.SetSession(nil)
if user.Conn != nil {
_, _ = user.Conn.Disconnect()
user.Conn.RemoveHandlers()
user.Conn = nil
}
jsonResponse(w, http.StatusOK, Response{true, "Session information purged"})
}
func (prov *ProvisioningAPI) DeleteConnection(w http.ResponseWriter, r *http.Request) {
user := r.Context().Value("user").(*User)
if user.Conn == nil {
jsonResponse(w, http.StatusNotFound, Error{
Error: "You don't have a WhatsApp connection.",
ErrCode: "not connected",
})
return
}
sess, err := user.Conn.Disconnect()
if err == nil && len(sess.Wid) > 0 {
user.SetSession(&sess)
}
user.Conn.RemoveHandlers()
user.Conn = nil
jsonResponse(w, http.StatusOK, Response{true, "Disconnected from WhatsApp and connection deleted"})
}
func (prov *ProvisioningAPI) Disconnect(w http.ResponseWriter, r *http.Request) {
user := r.Context().Value("user").(*User)
if user.Conn == nil {
jsonResponse(w, http.StatusNotFound, Error{
Error: "You don't have a WhatsApp connection.",
ErrCode: "no connection",
})
return
}
sess, err := user.Conn.Disconnect()
if err == whatsapp.ErrNotConnected {
jsonResponse(w, http.StatusNotFound, Error{
Error: "You were not connected",
ErrCode: "not connected",
})
return
} else if err != nil {
user.log.Warnln("Error while disconnecting:", err)
jsonResponse(w, http.StatusInternalServerError, Error{
Error: fmt.Sprintf("Unknown error while disconnecting: %v", err),
ErrCode: err.Error(),
})
return
} else if len(sess.Wid) > 0 {
user.SetSession(&sess)
}
jsonResponse(w, http.StatusOK, Response{true, "Disconnected from WhatsApp"})
}
func (prov *ProvisioningAPI) Reconnect(w http.ResponseWriter, r *http.Request) {
user := r.Context().Value("user").(*User)
if user.Conn == nil {
if user.Session == nil {
jsonResponse(w, http.StatusForbidden, Error{
Error: "No existing connection and no session. Please log in first.",
ErrCode: "no session",
})
} else {
user.Connect(false)
jsonResponse(w, http.StatusOK, Response{true, "Created connection to WhatsApp."})
}
return
}
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wasConnected := true
sess, err := user.Conn.Disconnect()
if err == whatsapp.ErrNotConnected {
wasConnected = false
} else if err != nil {
user.log.Warnln("Error while disconnecting:", err)
} else if len(sess.Wid) > 0 {
user.SetSession(&sess)
}
err = user.Conn.Restore()
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if err == whatsapp.ErrInvalidSession {
if user.Session != nil {
user.log.Debugln("Got invalid session error when reconnecting, but user has session. Retrying using RestoreWithSession()...")
var sess whatsapp.Session
sess, err = user.Conn.RestoreWithSession(*user.Session)
if err == nil {
user.SetSession(&sess)
}
} else {
jsonResponse(w, http.StatusForbidden, Error{
Error: "You're not logged in",
ErrCode: "not logged in",
})
return
}
} else if err == whatsapp.ErrLoginInProgress {
jsonResponse(w, http.StatusConflict, Error{
Error: "A login or reconnection is already in progress.",
ErrCode: "login in progress",
})
return
} else if err == whatsapp.ErrAlreadyLoggedIn {
jsonResponse(w, http.StatusConflict, Error{
Error: "You were already connected.",
ErrCode: err.Error(),
})
return
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}
if err != nil {
user.log.Warnln("Error while reconnecting:", err)
if err.Error() == "restore session connection timed out" {
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jsonResponse(w, http.StatusForbidden, Error{
Error: "Reconnection timed out. Is WhatsApp on your phone reachable?",
ErrCode: err.Error(),
})
} else {
jsonResponse(w, http.StatusForbidden, Error{
Error: fmt.Sprintf("Unknown error while reconnecting: %v", err),
ErrCode: err.Error(),
})
}
user.log.Debugln("Disconnecting due to failed session restore in reconnect command...")
sess, err := user.Conn.Disconnect()
if err != nil {
user.log.Errorln("Failed to disconnect after failed session restore in reconnect command:", err)
} else if len(sess.Wid) > 0 {
user.SetSession(&sess)
}
return
}
user.ConnectionErrors = 0
user.PostLogin()
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var msg string
if wasConnected {
msg = "Reconnected successfully."
} else {
msg = "Connected successfully."
}
jsonResponse(w, http.StatusOK, Response{true, msg})
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}
func (prov *ProvisioningAPI) Ping(w http.ResponseWriter, r *http.Request) {
user := r.Context().Value("user").(*User)
wa := map[string]interface{}{
"has_session": user.Session != nil,
"management_room": user.ManagementRoom,
"conn": nil,
"ping": nil,
}
if user.Conn != nil {
wa["conn"] = map[string]interface{}{
"is_connected": user.Conn.IsConnected(),
"is_logged_in": user.Conn.IsLoggedIn(),
"is_login_in_progress": user.Conn.IsLoginInProgress(),
}
ok, err := user.Conn.AdminTest()
wa["ping"] = map[string]interface{}{
"ok": ok,
"err": err,
}
}
resp := map[string]interface{}{
"mxid": user.MXID,
"admin": user.Admin,
"whitelisted": user.Whitelisted,
"relaybot_whitelisted": user.RelaybotWhitelisted,
"whatsapp": wa,
}
jsonResponse(w, http.StatusOK, resp)
}
func jsonResponse(w http.ResponseWriter, status int, response interface{}) {
w.Header().Add("Content-Type", "application/json")
w.WriteHeader(status)
_ = json.NewEncoder(w).Encode(response)
}
func (prov *ProvisioningAPI) Logout(w http.ResponseWriter, r *http.Request) {
user := r.Context().Value("user").(*User)
if user.Session == nil {
jsonResponse(w, http.StatusNotFound, Error{
Error: "You're not logged in",
ErrCode: "not logged in",
})
return
}
err := user.Conn.Logout()
if err != nil {
user.log.Warnln("Error while logging out:", err)
jsonResponse(w, http.StatusInternalServerError, Error{
Error: fmt.Sprintf("Unknown error while logging out: %v", err),
ErrCode: err.Error(),
})
return
}
_, err = user.Conn.Disconnect()
if err != nil {
user.log.Warnln("Error while disconnecting after logout:", err)
}
user.Conn.RemoveHandlers()
user.Conn = nil
user.SetSession(nil)
jsonResponse(w, http.StatusOK, Response{true, "Logged out successfully."})
}
var upgrader = websocket.Upgrader{}
func (prov *ProvisioningAPI) Login(w http.ResponseWriter, r *http.Request) {
userID := r.URL.Query().Get("user_id")
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user := prov.bridge.GetUserByMXID(id.UserID(userID))
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c, err := upgrader.Upgrade(w, r, nil)
if err != nil {
prov.log.Errorfln("Failed to upgrade connection to websocket:", err)
return
}
defer c.Close()
if !user.Connect(true) {
user.log.Debugln("Connect() returned false, assuming error was logged elsewhere and canceling login.")
_ = c.WriteJSON(Error{
Error: "Failed to connect to WhatsApp",
ErrCode: "connection error",
})
return
}
qrChan := make(chan string, 3)
go func() {
for code := range qrChan {
if code == "stop" {
return
}
_ = c.WriteJSON(map[string]interface{}{
"code": code,
})
}
}()
session, err := user.Conn.LoginWithRetry(qrChan, user.bridge.Config.Bridge.LoginQRRegenCount)
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qrChan <- "stop"
if err != nil {
var msg string
if err == whatsapp.ErrAlreadyLoggedIn {
msg = "You're already logged in"
} else if err == whatsapp.ErrLoginInProgress {
msg = "You have a login in progress already."
} else if err == whatsapp.ErrLoginTimedOut {
msg = "QR code scan timed out. Please try again."
} else {
user.log.Warnln("Failed to log in:", err)
msg = fmt.Sprintf("Unknown error while logging in: %v", err)
}
_ = c.WriteJSON(Error{
Error: msg,
ErrCode: err.Error(),
})
return
}
user.ConnectionErrors = 0
user.JID = strings.Replace(user.Conn.Info.Wid, whatsappExt.OldUserSuffix, whatsappExt.NewUserSuffix, 1)
user.SetSession(&session)
_ = c.WriteJSON(map[string]interface{}{
"success": true,
"jid": user.JID,
})
user.PostLogin()
}