Jan Dittberner
1aeacd0d1b
- add new flag "-t" for notification types to matrix-host-notification and matrix-service-notification - implement value validation for HostState and ServiceState
96 lines
2.6 KiB
Go
96 lines
2.6 KiB
Go
// Copyright Jan Dittberner
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// SPDX-License-Identifier: GPL-3.0-or-later
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package matrix
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import (
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"bytes"
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"crypto/rand"
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"encoding/base64"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"net/url"
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)
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const transactionIDLength = 16
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type Message struct {
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Type string `json:"msgtype"`
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Body string `json:"body"`
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FormattedBody string `json:"formatted_body"`
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Format string `json:"format"`
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}
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func SendMessage(server *url.URL, room string, token string, message string) error {
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messageBytes, err := json.Marshal(Message{
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Type: TextMessage,
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Body: message,
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FormattedBody: message,
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Format: HTMLFormat,
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})
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if err != nil {
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return fmt.Errorf("could not build JSON message: %w", err)
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}
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transaction, err := generateTransactionID()
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if err != nil {
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return err
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}
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postURL := server.JoinPath("/_matrix/client/r0/rooms/", room, "/send/m.room.message/", transaction)
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request, err := http.NewRequest(http.MethodPut, postURL.String(), bytes.NewBuffer(messageBytes))
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if err != nil {
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return fmt.Errorf("could not build request: %w", err)
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}
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request.Header.Set("Accept", "application/json")
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request.Header.Set("Content-Type", "application/json")
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request.Header.Set("Authorization", "Bearer "+token)
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response, err := http.DefaultClient.Do(request)
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if err != nil {
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return fmt.Errorf("could not send request: %w", err)
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}
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defer func() {
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_ = response.Body.Close()
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}()
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if response.StatusCode > http.StatusBadRequest {
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responseBody, err := io.ReadAll(response.Body)
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if err != nil {
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return fmt.Errorf("received an error: %s, could not read response body: %w", response.Status, err)
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}
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return fmt.Errorf("received an error: %s %s", response.Status, string(responseBody))
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}
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return nil
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}
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func generateTransactionID() (string, error) {
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IDBytes := make([]byte, transactionIDLength)
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_, err := rand.Read(IDBytes)
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if err != nil {
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return "", fmt.Errorf("could not generate transaction id: %w", err)
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}
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return base64.RawURLEncoding.EncodeToString(IDBytes), nil
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}
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