generated from VLADIMIR/template
114 lines
4.4 KiB
Go
114 lines
4.4 KiB
Go
package app
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import (
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"bytes"
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"context"
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"crypto/subtle"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"net/http"
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"strconv"
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"time"
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"evening_detective_server/internal/repos/teams_repo"
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"evening_detective_server/internal/services/game_service"
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)
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// TeamRegistrationHandler принимает webhook Яндекс Форм отдельно от пользовательского JWT.
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func TeamRegistrationHandler(token string, register func(context.Context, int, string, game_service.Registration) (int, error)) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "application/json")
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w.Header().Set("Cache-Control", "no-store")
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fail := func(code int, message string) {
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w.WriteHeader(code)
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_ = json.NewEncoder(w).Encode(map[string]string{"error": message})
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}
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if token == "" {
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fail(http.StatusServiceUnavailable, "Интеграция регистрации не настроена")
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return
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}
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if subtle.ConstantTimeCompare([]byte(r.Header.Get("Authorization")), []byte("Bearer "+token)) != 1 {
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fail(http.StatusUnauthorized, "Неверный токен интеграции")
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return
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}
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gameID, err := strconv.ParseInt(r.PathValue("id"), 10, 32)
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deliveryID := r.Header.Get("X-Delivery-Id")
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if err != nil || gameID <= 0 || deliveryID == "" || len(deliveryID) > 255 {
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fail(http.StatusBadRequest, "Требуются ID игры и заголовок X-Delivery-Id (до 255 байт)")
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return
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}
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decoder := json.NewDecoder(http.MaxBytesReader(w, r.Body, 16<<10))
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var payload json.RawMessage
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if err := decoder.Decode(&payload); err != nil {
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fail(http.StatusBadRequest, fmt.Sprintf("Некорректный JSON регистрации: %v", err))
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return
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}
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var extra any
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if err := decoder.Decode(&extra); err != io.EOF {
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if err == nil {
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fail(http.StatusBadRequest, "Некорректный JSON регистрации: после объекта обнаружены лишние данные")
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} else {
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fail(http.StatusBadRequest, fmt.Sprintf("Некорректный JSON регистрации: после объекта обнаружены лишние данные: %v", err))
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}
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return
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}
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registration, rpcID, isRPC, err := decodeRegistrationPayload(payload)
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if err != nil {
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fail(http.StatusBadRequest, fmt.Sprintf("Некорректный JSON регистрации: %v", err))
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return
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}
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ctx, cancel := context.WithTimeout(r.Context(), 4*time.Second)
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defer cancel()
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id, err := register(ctx, int(gameID), deliveryID, registration)
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switch {
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case errors.Is(err, game_service.ErrInvalidRegistration):
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fail(http.StatusBadRequest, err.Error())
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case errors.Is(err, teams_repo.ErrRegistrationClosed):
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fail(http.StatusConflict, err.Error())
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case err != nil:
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fail(http.StatusInternalServerError, "Не удалось зарегистрировать команду")
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default:
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if isRPC {
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_ = json.NewEncoder(w).Encode(map[string]any{"jsonrpc": "2.0", "result": map[string]int{"id": id}, "id": rpcID})
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} else {
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_ = json.NewEncoder(w).Encode(map[string]int{"id": id})
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}
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}
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})
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}
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func decodeRegistrationPayload(payload json.RawMessage) (game_service.Registration, json.RawMessage, bool, error) {
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var fields map[string]json.RawMessage
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if err := json.Unmarshal(payload, &fields); err != nil {
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return game_service.Registration{}, nil, false, err
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}
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if rawRPC, ok := fields["jsonrpc"]; ok {
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var version string
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if err := json.Unmarshal(rawRPC, &version); err != nil || version != "2.0" {
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return game_service.Registration{}, nil, true, errors.New(`поле "jsonrpc" должно быть равно "2.0"`)
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}
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params, ok := fields["params"]
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if !ok {
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return game_service.Registration{}, nil, true, errors.New(`в JSON-RPC запросе отсутствует поле "params"`)
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}
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var registration game_service.Registration
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if err := decodeStrict(params, ®istration); err != nil {
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return game_service.Registration{}, nil, true, fmt.Errorf("поле params: %w", err)
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}
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return registration, fields["id"], true, nil
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}
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var registration game_service.Registration
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if err := decodeStrict(payload, ®istration); err != nil {
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return game_service.Registration{}, nil, false, err
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}
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return registration, nil, false, nil
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}
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func decodeStrict(data []byte, target any) error {
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decoder := json.NewDecoder(bytes.NewReader(data))
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decoder.DisallowUnknownFields()
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return decoder.Decode(target)
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}
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