105 lines
3.4 KiB
Go
105 lines
3.4 KiB
Go
// Copyright 2017 Vector Creations Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package api
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"github.com/matrix-org/gomatrixserverlib"
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"net/http"
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)
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// QueryLatestEventsAndStateRequest is a request to QueryLatestEventsAndState
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type QueryLatestEventsAndStateRequest struct {
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// The roomID to query the latest events for.
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RoomID string
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// The state key tuples to fetch from the room current state.
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// If this list is empty or nil then no state events are returned.
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StateToFetch []gomatrixserverlib.StateKeyTuple
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}
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// QueryLatestEventsAndStateResponse is a response to QueryLatestEventsAndState
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type QueryLatestEventsAndStateResponse struct {
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// Copy of the request for debugging.
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QueryLatestEventsAndStateRequest
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// Does the room exist?
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// If the room doesn't exist this will be false and LatestEvents will be empty.
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RoomExists bool
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// The latest events in the room.
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LatestEvents []gomatrixserverlib.EventReference
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// The state events requested.
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StateEvents []gomatrixserverlib.Event
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}
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// RoomserverQueryAPI is used to query information from the room server.
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type RoomserverQueryAPI interface {
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// Query the latest events and state for a room from the room server.
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QueryLatestEventsAndState(
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request *QueryLatestEventsAndStateRequest,
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response *QueryLatestEventsAndStateResponse,
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) error
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}
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// RoomserverQueryLatestEventsAndStatePath is the HTTP path for the QueryLatestEventsAndState API.
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const RoomserverQueryLatestEventsAndStatePath = "/api/roomserver/QueryLatestEventsAndState"
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// NewRoomserverQueryAPIHTTP creates a RoomserverQueryAPI implemented by talking to a HTTP POST API.
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// If httpClient is nil then it uses the http.DefaultClient
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func NewRoomserverQueryAPIHTTP(roomserverURL string, httpClient *http.Client) RoomserverQueryAPI {
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if httpClient == nil {
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httpClient = http.DefaultClient
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}
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return &httpRoomserverQueryAPI{roomserverURL, *httpClient}
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}
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type httpRoomserverQueryAPI struct {
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roomserverURL string
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httpClient http.Client
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}
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// QueryLatestEventsAndState implements RoomserverQueryAPI
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func (h *httpRoomserverQueryAPI) QueryLatestEventsAndState(
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request *QueryLatestEventsAndStateRequest,
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response *QueryLatestEventsAndStateResponse,
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) error {
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apiURL := h.roomserverURL + RoomserverQueryLatestEventsAndStatePath
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return postJSON(h.httpClient, apiURL, request, response)
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}
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func postJSON(httpClient http.Client, apiURL string, request, response interface{}) error {
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jsonBytes, err := json.Marshal(request)
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if err != nil {
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return err
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}
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res, err := httpClient.Post(apiURL, "application/json", bytes.NewReader(jsonBytes))
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if res != nil {
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defer res.Body.Close()
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}
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if err != nil {
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return err
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}
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if res.StatusCode != 200 {
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var errorBody struct {
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Message string `json:"message"`
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}
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if err = json.NewDecoder(res.Body).Decode(&errorBody); err != nil {
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return err
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}
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return fmt.Errorf("api: %d: %s", res.StatusCode, errorBody.Message)
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}
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return json.NewDecoder(res.Body).Decode(response)
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}
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