Files
mautrix-telegram/pkg/gotd/telegram/invoke.go
T
2025-06-27 20:03:37 -07:00

105 lines
3.0 KiB
Go

package telegram
import (
"context"
"fmt"
"strings"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/trace"
"go.uber.org/zap"
"go.mau.fi/mautrix-telegram/pkg/gotd/bin"
"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
"go.mau.fi/mautrix-telegram/pkg/gotd/tgerr"
)
// API returns *tg.Client for calling raw MTProto methods.
func (c *Client) API() *tg.Client {
return c.tg
}
// Invoke invokes raw MTProto RPC method. It sends input and decodes result
// into output.
func (c *Client) Invoke(ctx context.Context, input bin.Encoder, output bin.Decoder) error {
if c.tracer != nil {
spanName := "Invoke"
var attrs []attribute.KeyValue
if t, ok := input.(interface{ TypeID() uint32 }); ok {
id := t.TypeID()
attrs = append(attrs,
attribute.Int64("tg.method.id_int", int64(id)),
attribute.String("tg.method.id", fmt.Sprintf("%x", id)),
)
name := c.opts.Types.Get(id)
if name == "" {
name = fmt.Sprintf("0x%x", id)
} else {
attrs = append(attrs, attribute.String("tg.method.name", name))
}
spanName = fmt.Sprintf("Invoke: %s", name)
}
spanCtx, span := c.tracer.Start(ctx, spanName,
trace.WithAttributes(attrs...),
trace.WithSpanKind(trace.SpanKindClient),
)
ctx = spanCtx
defer span.End()
}
return c.invoker.Invoke(ctx, input, output)
}
// invokeDirect directly invokes RPC method, automatically handling datacenter redirects.
func (c *Client) invokeDirect(ctx context.Context, input bin.Encoder, output bin.Decoder) error {
contextDC, _ := ctx.Value("tg_dc").(*int)
if _, ok := ctx.Value("tg_dc_inner").(bool); !ok {
if contextDC != nil && *contextDC > 0 {
c.log.With(zap.Int("context_dc", *contextDC)).Debug("Invoking on context DC")
return c.invokeSub(ctx, *contextDC, input, output)
}
}
if err := c.invokeConn(ctx, input, output); err != nil {
// Handling datacenter migration request.
if rpcErr, ok := tgerr.As(err); ok && strings.HasSuffix(rpcErr.Type, "_MIGRATE") {
targetDC := rpcErr.Argument
log := c.log.With(
zap.String("error_type", rpcErr.Type),
zap.Int("target_dc", targetDC),
)
// If migration error is FILE_MIGRATE or STATS_MIGRATE, then the method
// called by authorized client, so we should try to transfer auth to new DC
// and create new connection.
if rpcErr.IsOneOf("FILE_MIGRATE", "STATS_MIGRATE") {
log.Debug("Invoking on target DC")
if contextDC != nil {
log.Debug("Setting context DC")
*contextDC = targetDC
ctx = context.WithValue(ctx, "tg_dc_inner", true)
}
return c.invokeSub(ctx, targetDC, input, output)
}
// Otherwise we should change primary DC.
log.Info("Migrating to target DC")
return c.invokeMigrate(ctx, targetDC, input, output)
}
return err
}
return nil
}
// invokeConn directly invokes RPC call on primary connection without any
// additional handling.
func (c *Client) invokeConn(ctx context.Context, input bin.Encoder, output bin.Decoder) error {
c.connMux.Lock()
conn := c.conn
c.connMux.Unlock()
return conn.Invoke(ctx, input, output)
}