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// Copyright 2018 New Vector Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package query handles requests from other internal dendrite components when
// they interact with the AppServiceQueryAPI.
package query
import (
"context"
"encoding/json"
"net/http"
"net/url"
"time"
"github.com/gorilla/mux"
"github.com/matrix-org/dendrite/appservice/api"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/internal/config"
"github.com/matrix-org/util"
opentracing "github.com/opentracing/opentracing-go"
log "github.com/sirupsen/logrus"
)
const roomAliasExistsPath = "/rooms/"
const userIDExistsPath = "/users/"
// AppServiceQueryAPI is an implementation of api.AppServiceQueryAPI
type AppServiceQueryAPI struct {
HTTPClient *http.Client
Cfg *config.Dendrite
}
// RoomAliasExists performs a request to '/room/{roomAlias}' on all known
// handling application services until one admits to owning the room
func (a *AppServiceQueryAPI) RoomAliasExists(
ctx context.Context,
request *api.RoomAliasExistsRequest,
response *api.RoomAliasExistsResponse,
) error {
span, ctx := opentracing.StartSpanFromContext(ctx, "ApplicationServiceRoomAlias")
defer span.Finish()
// Create an HTTP client if one does not already exist
if a.HTTPClient == nil {
a.HTTPClient = makeHTTPClient()
}
// Determine which application service should handle this request
for _, appservice := range a.Cfg.Derived.ApplicationServices {
if appservice.URL != "" && appservice.IsInterestedInRoomAlias(request.Alias) {
// The full path to the rooms API, includes hs token
URL, err := url.Parse(appservice.URL + roomAliasExistsPath)
URL.Path += request.Alias
apiURL := URL.String() + "?access_token=" + appservice.HSToken
// Send a request to each application service. If one responds that it has
// created the room, immediately return.
req, err := http.NewRequest(http.MethodGet, apiURL, nil)
if err != nil {
return err
}
req = req.WithContext(ctx)
resp, err := a.HTTPClient.Do(req)
if resp != nil {
defer func() {
err = resp.Body.Close()
if err != nil {
log.WithFields(log.Fields{
"appservice_id": appservice.ID,
"status_code": resp.StatusCode,
}).WithError(err).Error("Unable to close application service response body")
}
}()
}
if err != nil {
log.WithError(err).Errorf("Issue querying room alias on application service %s", appservice.ID)
return err
}
switch resp.StatusCode {
case http.StatusOK:
// OK received from appservice. Room exists
response.AliasExists = true
return nil
case http.StatusNotFound:
// Room does not exist
default:
// Application service reported an error. Warn
log.WithFields(log.Fields{
"appservice_id": appservice.ID,
"status_code": resp.StatusCode,
}).Warn("Application service responded with non-OK status code")
}
}
}
response.AliasExists = false
return nil
}
// UserIDExists performs a request to '/users/{userID}' on all known
// handling application services until one admits to owning the user ID
func (a *AppServiceQueryAPI) UserIDExists(
ctx context.Context,
request *api.UserIDExistsRequest,
response *api.UserIDExistsResponse,
) error {
span, ctx := opentracing.StartSpanFromContext(ctx, "ApplicationServiceUserID")
defer span.Finish()
// Create an HTTP client if one does not already exist
if a.HTTPClient == nil {
a.HTTPClient = makeHTTPClient()
}
// Determine which application service should handle this request
for _, appservice := range a.Cfg.Derived.ApplicationServices {
if appservice.URL != "" && appservice.IsInterestedInUserID(request.UserID) {
// The full path to the rooms API, includes hs token
URL, err := url.Parse(appservice.URL + userIDExistsPath)
URL.Path += request.UserID
apiURL := URL.String() + "?access_token=" + appservice.HSToken
// Send a request to each application service. If one responds that it has
// created the user, immediately return.
req, err := http.NewRequest(http.MethodGet, apiURL, nil)
if err != nil {
return err
}
resp, err := a.HTTPClient.Do(req.WithContext(ctx))
if resp != nil {
defer func() {
err = resp.Body.Close()
if err != nil {
log.WithFields(log.Fields{
"appservice_id": appservice.ID,
"status_code": resp.StatusCode,
}).Error("Unable to close application service response body")
}
}()
}
if err != nil {
log.WithFields(log.Fields{
"appservice_id": appservice.ID,
}).WithError(err).Error("issue querying user ID on application service")
return err
}
if resp.StatusCode == http.StatusOK {
// StatusOK received from appservice. User ID exists
response.UserIDExists = true
return nil
}
// Log non OK
log.WithFields(log.Fields{
"appservice_id": appservice.ID,
"status_code": resp.StatusCode,
}).Warn("application service responded with non-OK status code")
}
}
response.UserIDExists = false
return nil
}
// makeHTTPClient creates an HTTP client with certain options that will be used for all query requests to application services
func makeHTTPClient() *http.Client {
return &http.Client{
Timeout: time.Second * 30,
}
}
// SetupHTTP adds the AppServiceQueryPAI handlers to the http.ServeMux. This
// handles and muxes incoming api requests the to internal AppServiceQueryAPI.
func (a *AppServiceQueryAPI) SetupHTTP(internalAPIMux *mux.Router) {
internalAPIMux.Handle(
api.AppServiceRoomAliasExistsPath,
internal.MakeInternalAPI("appserviceRoomAliasExists", func(req *http.Request) util.JSONResponse {
var request api.RoomAliasExistsRequest
var response api.RoomAliasExistsResponse
if err := json.NewDecoder(req.Body).Decode(&request); err != nil {
return util.ErrorResponse(err)
}
if err := a.RoomAliasExists(req.Context(), &request, &response); err != nil {
return util.ErrorResponse(err)
}
return util.JSONResponse{Code: http.StatusOK, JSON: &response}
}),
)
internalAPIMux.Handle(
api.AppServiceUserIDExistsPath,
internal.MakeInternalAPI("appserviceUserIDExists", func(req *http.Request) util.JSONResponse {
var request api.UserIDExistsRequest
var response api.UserIDExistsResponse
if err := json.NewDecoder(req.Body).Decode(&request); err != nil {
return util.ErrorResponse(err)
}
if err := a.UserIDExists(req.Context(), &request, &response); err != nil {
return util.ErrorResponse(err)
}
return util.JSONResponse{Code: http.StatusOK, JSON: &response}
}),
)
}
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