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Federation fixes and error handling (#970)

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* Improve error handling in federation /send endpoint a bit

* Remove unknownRoomError, use unmarshalError when unable to get room ID

* Swap out a couple more internal server errors

* Update gomatrixserverlib

* Update gomatrixserverlib

* Update gomatrixserverlib

* Update gomatrixserverlib

* Update gomatrixserverlib

* Update gomatrixserverlib

* Return bad limit in error

* Same with domain/userid
This commit is contained in:
Neil Alexander 2020-04-16 17:59:55 +01:00 committed by GitHub
parent 3110a81996
commit 3c2e6f967b
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
5 changed files with 56 additions and 21 deletions
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6
federationapi/routing/backfill.go
View file

@ -16,6 +16,7 @@ package routing
import (
"encoding/json"
"fmt"
"net/http"
"strconv"
"time"
@ -73,7 +74,10 @@ func Backfill(
}
if req.Limit, err = strconv.Atoi(limit); err != nil {
util.GetLogger(httpReq.Context()).WithError(err).Error("strconv.Atoi failed")
return jsonerror.InternalServerError()
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.InvalidArgumentValue(fmt.Sprintf("limit %q is invalid format", limit)),
}
}
// Query the roomserver.

12
federationapi/routing/profile.go
View file

@ -15,6 +15,7 @@
package routing
import (
"fmt"
"net/http"
appserviceAPI "github.com/matrix-org/dendrite/appservice/api"
@ -46,12 +47,17 @@ func GetProfile(
_, domain, err := gomatrixserverlib.SplitID('@', userID)
if err != nil {
util.GetLogger(httpReq.Context()).WithError(err).Error("gomatrixserverlib.SplitID failed")
return jsonerror.InternalServerError()
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.MissingArgument(fmt.Sprintf("Format of user ID %q is invalid", userID)),
}
}
if domain != cfg.Matrix.ServerName {
util.GetLogger(httpReq.Context()).WithError(err).Error("domain != cfg.Matrix.ServerName failed")
return jsonerror.InternalServerError()
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.InvalidArgumentValue(fmt.Sprintf("Domain %q does not match this server", domain)),
}
}
profile, err := appserviceAPI.RetrieveUserProfile(httpReq.Context(), userID, asAPI, accountDB)

52
federationapi/routing/send.go
View file

@ -71,14 +71,28 @@ func Send(
util.GetLogger(httpReq.Context()).Infof("Received transaction %q containing %d PDUs, %d EDUs", txnID, len(t.PDUs), len(t.EDUs))
resp, err := t.processTransaction()
if err != nil {
switch err.(type) {
// No error? Great! Send back a 200.
case nil:
return util.JSONResponse{
Code: http.StatusOK,
JSON: resp,
}
// Handle known error cases as we will return a 400 error for these.
case roomNotFoundError:
case unmarshalError:
case verifySigError:
// Handle unknown error cases. Sending 500 errors back should be a last
// resort as this can make other homeservers back off sending federation
// events.
default:
util.GetLogger(httpReq.Context()).WithError(err).Error("t.processTransaction failed")
return jsonerror.InternalServerError()
}
// Return a 400 error for bad requests as fallen through from above.
return util.JSONResponse{
Code: http.StatusOK,
JSON: resp,
Code: http.StatusBadRequest,
JSON: jsonerror.BadJSON(err.Error()),
}
}
@ -93,6 +107,8 @@ type txnReq struct {
}
func (t *txnReq) processTransaction() (*gomatrixserverlib.RespSend, error) {
results := make(map[string]gomatrixserverlib.PDUResult)
var pdus []gomatrixserverlib.HeaderedEvent
for _, pdu := range t.PDUs {
var header struct {
@ -100,28 +116,27 @@ func (t *txnReq) processTransaction() (*gomatrixserverlib.RespSend, error) {
}
if err := json.Unmarshal(pdu, &header); err != nil {
util.GetLogger(t.context).WithError(err).Warn("Transaction: Failed to extract room ID from event")
return nil, err
return nil, unmarshalError{err}
}
verReq := api.QueryRoomVersionForRoomRequest{RoomID: header.RoomID}
verRes := api.QueryRoomVersionForRoomResponse{}
if err := t.query.QueryRoomVersionForRoom(t.context, &verReq, &verRes); err != nil {
util.GetLogger(t.context).WithError(err).Warn("Transaction: Failed to query room version for room", verReq.RoomID)
return nil, err
return nil, roomNotFoundError{verReq.RoomID}
}
event, err := gomatrixserverlib.NewEventFromUntrustedJSON(pdu, verRes.RoomVersion)
if err != nil {
util.GetLogger(t.context).WithError(err).Warnf("Transaction: Failed to parse event JSON of event %q", event.EventID())
return nil, err
return nil, unmarshalError{err}
}
if err := gomatrixserverlib.VerifyAllEventSignatures(t.context, []gomatrixserverlib.Event{event}, t.keys); err != nil {
util.GetLogger(t.context).WithError(err).Warnf("Transaction: Couldn't validate signature of event %q", event.EventID())
return nil, err
return nil, verifySigError{event.EventID(), err}
}
pdus = append(pdus, event.Headered(verRes.RoomVersion))
}
// Process the events.
results := map[string]gomatrixserverlib.PDUResult{}
for _, e := range pdus {
err := t.processEvent(e.Unwrap())
if err != nil {
@ -141,7 +156,7 @@ func (t *txnReq) processTransaction() (*gomatrixserverlib.RespSend, error) {
// If we bail and stop processing then we risk wedging incoming
// transactions from that server forever.
switch err.(type) {
case unknownRoomError:
case roomNotFoundError:
case *gomatrixserverlib.NotAllowed:
default:
// Any other error should be the result of a temporary error in
@ -162,11 +177,22 @@ func (t *txnReq) processTransaction() (*gomatrixserverlib.RespSend, error) {
return &gomatrixserverlib.RespSend{PDUs: results}, nil
}
type unknownRoomError struct {
type roomNotFoundError struct {
roomID string
}
type unmarshalError struct {
err error
}
type verifySigError struct {
eventID string
err error
}
func (e unknownRoomError) Error() string { return fmt.Sprintf("unknown room %q", e.roomID) }
func (e roomNotFoundError) Error() string { return fmt.Sprintf("room %q not found", e.roomID) }
func (e unmarshalError) Error() string { return fmt.Sprintf("unable to parse event: %s", e.err) }
func (e verifySigError) Error() string {
return fmt.Sprintf("unable to verify signature of event %q: %s", e.eventID, e.err)
}
func (t *txnReq) processEDUs(edus []gomatrixserverlib.EDU) {
for _, e := range edus {
@ -213,7 +239,7 @@ func (t *txnReq) processEvent(e gomatrixserverlib.Event) error {
// that this server is unaware of.
// However generally speaking we should reject events for rooms we
// aren't a member of.
return unknownRoomError{e.RoomID()}
return roomNotFoundError{e.RoomID()}
}
if !stateResp.PrevEventsExist {

3
go.mod
View file

@ -17,7 +17,7 @@ require (
github.com/matrix-org/go-http-js-libp2p v0.0.0-20200318135427-31631a9ef51f
github.com/matrix-org/go-sqlite3-js v0.0.0-20200325174927-327088cdef10
github.com/matrix-org/gomatrix v0.0.0-20190528120928-7df988a63f26
github.com/matrix-org/gomatrixserverlib v0.0.0-20200416113012-dafb32a889ea
github.com/matrix-org/gomatrixserverlib v0.0.0-20200416165239-837ed63a0046
github.com/matrix-org/naffka v0.0.0-20200127221512-0716baaabaf1
github.com/matrix-org/util v0.0.0-20190711121626-527ce5ddefc7
github.com/mattn/go-sqlite3 v2.0.3+incompatible
@ -27,7 +27,6 @@ require (
github.com/pierrec/lz4 v2.5.0+incompatible // indirect
github.com/pkg/errors v0.9.1
github.com/prometheus/client_golang v1.4.1
github.com/prometheus/common v0.9.1
github.com/rcrowley/go-metrics v0.0.0-20200313005456-10cdbea86bc0 // indirect
github.com/sirupsen/logrus v1.4.2
github.com/tidwall/gjson v1.6.0 // indirect

4
go.sum
View file

@ -364,8 +364,8 @@ github.com/matrix-org/gomatrix v0.0.0-20190528120928-7df988a63f26 h1:Hr3zjRsq2bh
github.com/matrix-org/gomatrix v0.0.0-20190528120928-7df988a63f26/go.mod h1:3fxX6gUjWyI/2Bt7J1OLhpCzOfO/bB3AiX0cJtEKud0=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200124100636-0c2ec91d1df5 h1:kmRjpmFOenVpOaV/DRlo9p6z/IbOKlUC+hhKsAAh8Qg=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200124100636-0c2ec91d1df5/go.mod h1:FsKa2pWE/bpQql9H7U4boOPXFoJX/QcqaZZ6ijLkaZI=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200416113012-dafb32a889ea h1:aiBD966UX0l4rTPgAu+u8CaiMfy+N8qWlZ2TIBp+0eM=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200416113012-dafb32a889ea/go.mod h1:FsKa2pWE/bpQql9H7U4boOPXFoJX/QcqaZZ6ijLkaZI=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200416165239-837ed63a0046 h1:R7iYuS8hhXdrqs5OSNF3Y3chaIFWU9KLpnzjjsdJkMU=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200416165239-837ed63a0046/go.mod h1:FsKa2pWE/bpQql9H7U4boOPXFoJX/QcqaZZ6ijLkaZI=
github.com/matrix-org/naffka v0.0.0-20200127221512-0716baaabaf1 h1:osLoFdOy+ChQqVUn2PeTDETFftVkl4w9t/OW18g3lnk=
github.com/matrix-org/naffka v0.0.0-20200127221512-0716baaabaf1/go.mod h1:cXoYQIENbdWIQHt1SyCo6Bl3C3raHwJ0wgVrXHSqf+A=
github.com/matrix-org/util v0.0.0-20171127121716-2e2df66af2f5 h1:W7l5CP4V7wPyPb4tYE11dbmeAOwtFQBTW0rf4OonOS8=