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Return remote errors from FS.PerformJoin (#1164)

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* Return remote errors from FS.PerformJoin

Follows the same pattern as PerformJoin on roomserver (no error return).

Also return the right format for incompatible room version errors.

Makes a bunch of tests pass!

* Handle network errors better when returning remote HTTP errors

* Linting

* Fix tests

* Update whitelist, pass network errors through in API=1 mode
This commit is contained in:
Kegsay 2020-06-25 15:04:48 +01:00 committed by GitHub
parent c2d34422d6
commit 43cddfe00f
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GPG key ID: 4AEE18F83AFDEB23
10 changed files with 83 additions and 21 deletions
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14
clientapi/jsonerror/jsonerror.go
View file

@ -125,10 +125,20 @@ func GuestAccessForbidden(msg string) *MatrixError {
return &MatrixError{"M_GUEST_ACCESS_FORBIDDEN", msg}
}
type IncompatibleRoomVersionError struct {
RoomVersion string `json:"room_version"`
Error string `json:"error"`
Code string `json:"errcode"`
}
// IncompatibleRoomVersion is an error which is returned when the client
// requests a room with a version that is unsupported.
func IncompatibleRoomVersion(roomVersion gomatrixserverlib.RoomVersion) *MatrixError {
return &MatrixError{"M_INCOMPATIBLE_ROOM_VERSION", string(roomVersion)}
func IncompatibleRoomVersion(roomVersion gomatrixserverlib.RoomVersion) *IncompatibleRoomVersionError {
return &IncompatibleRoomVersionError{
Code: "M_INCOMPATIBLE_ROOM_VERSION",
RoomVersion: string(roomVersion),
Error: "Your homeserver does not support the features required to join this room",
}
}
// UnsupportedRoomVersion is an error which is returned when the client

4
federationsender/api/api.go
View file

@ -4,6 +4,7 @@ import (
"context"
"github.com/matrix-org/dendrite/federationsender/types"
"github.com/matrix-org/gomatrix"
"github.com/matrix-org/gomatrixserverlib"
)
@ -28,7 +29,7 @@ type FederationSenderInternalAPI interface {
ctx context.Context,
request *PerformJoinRequest,
response *PerformJoinResponse,
) error
)
// Handle an instruction to make_leave & send_leave with a remote server.
PerformLeave(
ctx context.Context,
@ -62,6 +63,7 @@ type PerformJoinRequest struct {
}
type PerformJoinResponse struct {
LastError *gomatrix.HTTPError
}
type PerformLeaveRequest struct {

28
federationsender/internal/perform.go
View file

@ -2,6 +2,7 @@ package internal
import (
"context"
"errors"
"fmt"
"time"
@ -9,6 +10,7 @@ import (
"github.com/matrix-org/dendrite/federationsender/internal/perform"
roomserverAPI "github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/dendrite/roomserver/version"
"github.com/matrix-org/gomatrix"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/util"
"github.com/sirupsen/logrus"
@ -40,7 +42,7 @@ func (r *FederationSenderInternalAPI) PerformJoin(
ctx context.Context,
request *api.PerformJoinRequest,
response *api.PerformJoinResponse,
) (err error) {
) {
// Look up the supported room versions.
var supportedVersions []gomatrixserverlib.RoomVersion
for version := range version.SupportedRoomVersions() {
@ -63,6 +65,7 @@ func (r *FederationSenderInternalAPI) PerformJoin(
// Try each server that we were provided until we land on one that
// successfully completes the make-join send-join dance.
var lastErr error
for _, serverName := range request.ServerNames {
if err := r.performJoinUsingServer(
ctx,
@ -76,17 +79,32 @@ func (r *FederationSenderInternalAPI) PerformJoin(
"server_name": serverName,
"room_id": request.RoomID,
}).Warnf("Failed to join room through server")
lastErr = err
continue
}
// We're all good.
return nil
return
}
// If we reach here then we didn't complete a join for some reason.
return fmt.Errorf(
"failed to join user %q to room %q through %d server(s)",
request.UserID, request.RoomID, len(request.ServerNames),
var httpErr gomatrix.HTTPError
if ok := errors.As(lastErr, &httpErr); ok {
httpErr.Message = string(httpErr.Contents)
// Clear the wrapped error, else serialising to JSON (in polylith mode) will fail
httpErr.WrappedError = nil
response.LastError = &httpErr
} else {
response.LastError = &gomatrix.HTTPError{
Code: 0,
WrappedError: nil,
Message: lastErr.Error(),
}
}
logrus.Errorf(
"failed to join user %q to room %q through %d server(s): last error %s",
request.UserID, request.RoomID, len(request.ServerNames), lastErr,
)
}

12
federationsender/inthttp/client.go
View file

@ -7,6 +7,7 @@ import (
"github.com/matrix-org/dendrite/federationsender/api"
"github.com/matrix-org/dendrite/internal/httputil"
"github.com/matrix-org/gomatrix"
"github.com/opentracing/opentracing-go"
)
@ -77,12 +78,19 @@ func (h *httpFederationSenderInternalAPI) PerformJoin(
ctx context.Context,
request *api.PerformJoinRequest,
response *api.PerformJoinResponse,
) error {
) {
span, ctx := opentracing.StartSpanFromContext(ctx, "PerformJoinRequest")
defer span.Finish()
apiURL := h.federationSenderURL + FederationSenderPerformJoinRequestPath
return httputil.PostJSON(ctx, span, h.httpClient, apiURL, request, response)
err := httputil.PostJSON(ctx, span, h.httpClient, apiURL, request, response)
if err != nil {
response.LastError = &gomatrix.HTTPError{
Message: err.Error(),
Code: 0,
WrappedError: err,
}
}
}
// Handle an instruction to make_join & send_join with a remote server.

4
federationsender/inthttp/server.go
View file

@ -33,9 +33,7 @@ func AddRoutes(intAPI api.FederationSenderInternalAPI, internalAPIMux *mux.Route
if err := json.NewDecoder(req.Body).Decode(&request); err != nil {
return util.MessageResponse(http.StatusBadRequest, err.Error())
}
if err := intAPI.PerformJoin(req.Context(), &request, &response); err != nil {
return util.ErrorResponse(err)
}
intAPI.PerformJoin(req.Context(), &request, &response)
return util.JSONResponse{Code: http.StatusOK, JSON: &response}
}),
)

2
go.mod
View file

@ -20,7 +20,7 @@ require (
github.com/matrix-org/go-http-js-libp2p v0.0.0-20200518170932-783164aeeda4
github.com/matrix-org/go-sqlite3-js v0.0.0-20200522092705-bc8506ccbcf3
github.com/matrix-org/gomatrix v0.0.0-20190528120928-7df988a63f26
github.com/matrix-org/gomatrixserverlib v0.0.0-20200623103809-13ff8109e137
github.com/matrix-org/gomatrixserverlib v0.0.0-20200625121044-e5d892cd30c1
github.com/matrix-org/naffka v0.0.0-20200422140631-181f1ee7401f
github.com/matrix-org/util v0.0.0-20190711121626-527ce5ddefc7
github.com/mattn/go-sqlite3 v2.0.2+incompatible

4
go.sum
View file

@ -371,8 +371,8 @@ github.com/matrix-org/go-sqlite3-js v0.0.0-20200522092705-bc8506ccbcf3 h1:Yb+Wlf
github.com/matrix-org/go-sqlite3-js v0.0.0-20200522092705-bc8506ccbcf3/go.mod h1:e+cg2q7C7yE5QnAXgzo512tgFh1RbQLC0+jozuegKgo=
github.com/matrix-org/gomatrix v0.0.0-20190528120928-7df988a63f26 h1:Hr3zjRsq2bhrnp3Ky1qgx/fzCtCALOoGYylh2tpS9K4=
github.com/matrix-org/gomatrix v0.0.0-20190528120928-7df988a63f26/go.mod h1:3fxX6gUjWyI/2Bt7J1OLhpCzOfO/bB3AiX0cJtEKud0=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200623103809-13ff8109e137 h1:+eBh4L04+08IslvFM071TNrQTggU317GsQKzZ1SGEVo=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200623103809-13ff8109e137/go.mod h1:JsAzE1Ll3+gDWS9JSUHPJiiyAksvOOnGWF2nXdg4ZzU=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200625121044-e5d892cd30c1 h1:3yS6hw01X72jpJuAPGVOY+QFD9cpAETR/6Hq2WYKbpU=
github.com/matrix-org/gomatrixserverlib v0.0.0-20200625121044-e5d892cd30c1/go.mod h1:JsAzE1Ll3+gDWS9JSUHPJiiyAksvOOnGWF2nXdg4ZzU=
github.com/matrix-org/naffka v0.0.0-20200422140631-181f1ee7401f h1:pRz4VTiRCO4zPlEMc3ESdUOcW4PXHH4Kj+YDz1XyE+Y=
github.com/matrix-org/naffka v0.0.0-20200422140631-181f1ee7401f/go.mod h1:y0oDTjZDv5SM9a2rp3bl+CU+bvTRINQsdb7YlDql5Go=
github.com/matrix-org/util v0.0.0-20190711121626-527ce5ddefc7 h1:ntrLa/8xVzeSs8vHFHK25k0C+NV74sYMJnNSg5NoSRo=

19
roomserver/api/perform.go
View file

@ -1,6 +1,7 @@
package api
import (
"encoding/json"
"fmt"
"net/http"
@ -12,8 +13,9 @@ import (
type PerformErrorCode int
type PerformError struct {
Msg string
Code PerformErrorCode
Msg string
RemoteCode int // remote HTTP status code, for PerformErrRemote
Code PerformErrorCode
}
func (p *PerformError) Error() string {
@ -43,6 +45,17 @@ func (p *PerformError) JSONResponse() util.JSONResponse {
Code: http.StatusForbidden,
JSON: jsonerror.Forbidden(p.Msg),
}
case PerformErrRemote:
// if the code is 0 then something bad happened and it isn't
// a remote HTTP error being encapsulated, e.g network error to remote.
if p.RemoteCode == 0 {
return util.ErrorResponse(fmt.Errorf("%s", p.Msg))
}
return util.JSONResponse{
Code: p.RemoteCode,
// TODO: Should we assert this is in fact JSON? E.g gjson parse?
JSON: json.RawMessage(p.Msg),
}
default:
return util.ErrorResponse(p)
}
@ -57,6 +70,8 @@ const (
PerformErrorNoRoom PerformErrorCode = 3
// PerformErrorNoOperation means that the request resulted in nothing happening e.g invite->invite or leave->leave.
PerformErrorNoOperation PerformErrorCode = 4
// PerformErrRemote means that the request failed and the PerformError.Msg is the raw remote JSON error response
PerformErrRemote PerformErrorCode = 5
)
type PerformJoinRequest struct {

10
roomserver/internal/perform_join.go
View file

@ -270,9 +270,13 @@ func (r *RoomserverInternalAPI) performFederatedJoinRoomByID(
Content: req.Content, // the membership event content
}
fedRes := fsAPI.PerformJoinResponse{}
if err := r.fsAPI.PerformJoin(ctx, &fedReq, &fedRes); err != nil {
return fmt.Errorf("Error joining federated room: %q", err)
r.fsAPI.PerformJoin(ctx, &fedReq, &fedRes)
if fedRes.LastError != nil {
return &api.PerformError{
Code: api.PerformErrRemote,
Msg: fedRes.LastError.Message,
RemoteCode: fedRes.LastError.Code,
}
}
return nil
}

7
sytest-whitelist
View file

@ -366,3 +366,10 @@ Typing notification sent to local room members
Typing notifications also sent to remote room members
Typing can be explicitly stopped
Banned user is kicked and may not rejoin until unbanned
Inbound federation rejects attempts to join v1 rooms from servers without v1 support
Inbound federation rejects attempts to join v2 rooms from servers lacking version support
Inbound federation rejects attempts to join v2 rooms from servers only supporting v1
Outbound federation passes make_join failures through to the client
Outbound federation correctly handles unsupported room versions
Remote users may not join unfederated rooms
Guest users denied access over federation if guest access prohibited