cjongseok
panic: runtime error: invalid memory address or nil pointer dereference
The code that I am writing is this:
What I am trying to do is to get a list of dialogs. But sometime panic error happens due to some network error.
package main
import (
"github.com/cjongseok/mtproto"
"context"
"os"
"fmt"
"github.com/cjongseok/slog"
"math/rand"
"reflect"
)
func main() {
// the acc we are using is: (telegram acc new three)
caller := setUpLoggingNConnectNGetCaller()
getDialogs(caller) // === line 16 ===
}
func getDialogs(caller *mtproto.RPCaller) *mtproto.PredMessagesDialogs {
emptyPeer := &mtproto.TypeInputPeer{Value: &mtproto.TypeInputPeer_InputPeerEmpty{InputPeerEmpty: &mtproto.PredInputPeerEmpty{}}}
var response *mtproto.TypeMessagesDialogs
r, err := caller.MessagesGetDialogs(context.Background(), &mtproto.ReqMessagesGetDialogs{ // === line 22 ===
OffsetDate: 0, OffsetId: 0, OffsetPeer: emptyPeer,
})
if err != nil {
fmt.Println("Can not get dialogs due to error:", err)
}
response = r
dialogs := response.GetMessagesDialogs().GetDialogs()
for _, item := range dialogs {
fmt.Println(reflect.TypeOf(item.GetValue()))
fmt.Println()
}
return response.GetMessagesDialogs()
}
func setUpLoggingNConnectNGetCaller() *mtproto.RPCaller {
// set up logging
logf, err := os.OpenFile("ss.log", os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
if err != nil {
fmt.Printf("error opening file: %v", err)
}
defer logf.Close()
slog.SetLogOutput(logf)
appVersion := "0.1"
deviceModel := "SHIT"
systemVersion := "0.2"
language := "en"
config, _ := mtproto.NewConfiguration(appVersion, deviceModel, systemVersion, language, 0, 0, "credentials.json")
manager, _ := mtproto.NewManager(config)
// Sign-in by key
mconn, _ := manager.LoadAuthentication()
caller := mtproto.RPCaller{RPC: mconn}
return &caller
}
The error that happens is this:
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x7a61be]
goroutine 1 [running]:
kasra/doingstuff_on_tg/vendor/github.com/cjongseok/mtproto.(*Conn).LogPrefix(0x0, 0xc49d80, 0x0)
/home/kasra/go/src/kasra/doingstuff_on_tg/vendor/github.com/cjongseok/mtproto/conn.go:363 +0x2e
kasra/doingstuff_on_tg/vendor/github.com/cjongseok/slog.logprefix(0xc49d80, 0x0, 0x0, 0x12bc180)
/home/kasra/go/src/kasra/doingstuff_on_tg/vendor/github.com/cjongseok/slog/slog.go:128 +0x29a
kasra/doingstuff_on_tg/vendor/github.com/cjongseok/slog.Logln(0xc49d80, 0x0, 0xc420093860, 0x2, 0x2)
/home/kasra/go/src/kasra/doingstuff_on_tg/vendor/github.com/cjongseok/slog/slog.go:165 +0x6d
kasra/doingstuff_on_tg/vendor/github.com/cjongseok/mtproto.(*Conn).Session(0x0, 0x1)
/home/kasra/go/src/kasra/doingstuff_on_tg/vendor/github.com/cjongseok/mtproto/conn.go:151 +0xdc
kasra/doingstuff_on_tg/vendor/github.com/cjongseok/mtproto.(*Conn).InvokeNonBlocked(0x0, 0xd09ac0, 0xc420250580, 0xc420093d70)
/home/kasra/go/src/kasra/doingstuff_on_tg/vendor/github.com/cjongseok/mtproto/conn.go:130 +0x90
kasra/doingstuff_on_tg/vendor/github.com/cjongseok/mtproto.(*Conn).InvokeBlocked(0x0, 0xd09ac0, 0xc420250580, 0x7f1b32e68d90, 0x0, 0x2, 0xdf8475800)
/home/kasra/go/src/kasra/doingstuff_on_tg/vendor/github.com/cjongseok/mtproto/conn.go:114 +0x5d
kasra/doingstuff_on_tg/vendor/github.com/cjongseok/mtproto.RPCaller.MessagesGetDialogs(0xd04060, 0x0, 0xd25760, 0xc4200d4050, 0xc420250580, 0xc88ace, 0x2, 0xdf8475800)
/home/kasra/go/src/kasra/doingstuff_on_tg/vendor/github.com/cjongseok/mtproto/procs.tl.go:424 +0x57
main.getDialogs(0xc4202482f0, 0xc4200b8058)
/home/kasra/go/src/kasra/doingstuff_on_tg/_accounts_/main.go:22 +0x127
main.main()
/home/kasra/go/src/kasra/doingstuff_on_tg/_accounts_/main.go:16 +0x27
exit status 2
How can I handle this kind of error? (I have put comment after line 22 and 16 of my code to make it clear)
As you can see I have received the error in err variable and checked it but I still get this panic.
Not to mention that I dont ALWAYS get this panic, It just happens sometimes due to network errors, How can I handle this one?
@amir3code Thanks for your interest in this repository. It seems sometimes manager.LoadAuthentication() returns nil conn. Can you check it with
mconn, err := manager.LoadAuthentication()
if err != nil {
fmt.Println(err)
}
instead of
mconn, _ := manager.LoadAuthentication()
For more evidences please share the log file ss.log after removing your credentials.
For your information, if you want to fetch the list of all the channels and chat groups, I recommend to use MessagesGetAllChats() instead of MessagesGetDialogs(). Please check this simple shell command for the usage.
I now have a ss.log file but it is crowded and over 1 megabyte! I will try to incorporate your change and post the log file in the next two days.
BTW, one question.
Is there any way to distinguish between a Super Group and a Channel? because they are both returned with the type Channel.
Actually I have no idea for the problem. Although I checked responses from not only MessagesGetAllChats() but ChannelsGetFullChannel(), I couldn't get any difference between channel and group. So in my case I'm doing that manually, since I'm joined a couple of groups.
Yeah yeah they are both the same unfortunately.
I have another question, How should I tell that for example MessagesGetAllChats method wants nothing in its arguments, how can I know that?
For example I have written the same as the simple shell file you told me:
func getDialogsAllTest(caller *mtproto.RPCaller) *mtproto.TypeMessagesDialogs {
r, _ := caller.MessagesGetAllChats(context.Background(), &mtproto.ReqMessagesGetAllChats{})
return r
}
The struct ReqMessagesGetAllChats should have nothing as argument for creation, right? but I see that It accepts one argument (assuming that XXX* are not necessary) ...
func getDialogsAllTest(caller *mtproto.RPCaller) *mtproto.TypeMessagesDialogs {
r, _ := caller.MessagesGetAllChats(context.Background(), &mtproto.ReqMessagesGetAllChats{
ExceptIds: nil,
XXX_NoUnkeyedLiteral: struct{}{},
XXX_unrecognized: nil,
XXX_sizecache: 0,
})
return r
}
And that is ExceptIds. How should I tell that I do not have to fill this parameter. Is it all try and error or there is a documentation? How did you figured these out? Thanks for your time.
Right it is all try and error. You can find some old methods in Telegram API document, but its version is too old (document: 23, cjongseok/mtproto: 71, latest: 91). Another documentation source is tdlib document. It is quite recent, but you know there is a interface gap between tdlib and tl-schema.