How to use MarshalJSON method of types Package

Best K6 code snippet using types.MarshalJSON

room_master.go

Source:room_master.go Github

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...22 }23 event := types.Event{}24 err := event.UnmarshalJSON(message)25 if err != nil {26 response, _ := types.ErrorMessage("error while parsing first level: " + err.Error()).MarshalJSON()27 response, _ = types.Event{28 Method: "error_message",29 Parameter: response,30 }.MarshalJSON()31 if role == 0 {32 r.Messaging.User0To <- response33 } else {34 r.Messaging.User1To <- response35 }36 continue37 }38 if event.Method == "upload_map" {39 err := r.UploadMap(role, event.Parameter)40 if err != nil {41 response, _ := types.ErrorMessage("error while process 'upload_map': " + err.Error()).MarshalJSON()42 response, _ = types.Event{43 Method: "error_message",44 Parameter: response,45 }.MarshalJSON()46 if role == 0 {47 r.Messaging.User0To <- response48 } else {49 r.Messaging.User1To <- response50 }51 if r.User0UploadedCharacters && r.User1UploadedCharacters {52 r.DownloadMap(role)53 }54 }55 continue56 }57 if event.Method == "attempt_go_to_cell" {58 gameover, err := r.AttemptGoToCell(role, event.Parameter)59 if err != nil {60 response, _ := types.ErrorMessage("error while process 'attempt_go_to_cell': " + err.Error()).MarshalJSON()61 response, _ = types.Event{62 Method: "error_message",63 Parameter: response,64 }.MarshalJSON()65 if role == 0 {66 r.Messaging.User0To <- response67 } else {68 r.Messaging.User1To <- response69 }70 if r.User0UploadedCharacters && r.User1UploadedCharacters {71 r.DownloadMap(role)72 }73 }74 if gameover {75 // к этому моменту эже все данные должны быть отправлены. только сетевые вопросы и остановка всех 5-и горутин.76 r.StopRoom()77 // отрегистирует в Rooms.78 r.RemoveRoom()79 break80 }81 continue82 }83 if event.Method == "reassign_weapons" {84 err = r.ReassignWeapons(role, event.Parameter)85 if err != nil {86 response, _ := types.ErrorMessage("error while process 'reassign_weapons': " + err.Error()).MarshalJSON()87 response, _ = types.Event{88 Method: "error_message",89 Parameter: response,90 }.MarshalJSON()91 if role == 0 {92 r.Messaging.User0To <- response93 } else {94 r.Messaging.User1To <- response95 }96 if r.User0UploadedCharacters && r.User1UploadedCharacters {97 r.DownloadMap(role)98 }99 }100 continue101 }102 // если ни один из трёх методов не отработал, прислали меверный метод, кидаем ошибку103 response, _ := types.Event{104 Method: "error_message",105 Parameter: easyjson.RawMessage("unknown method '" + event.Method + "', " +106 "available only ['attempt_go_to_cell', 'upload_map', 'reassign_weapons']."),107 }.MarshalJSON()108 if role == 0 {109 r.Messaging.User0To <- response110 } else {111 r.Messaging.User1To <- response112 }113 }114 log.Print("GameMaster for room = " + r.OwnNumber.String() + " correctly completed.")115 return116}117// ответственность: загружает данные от пользователя, начинает игру118func (r *Room) UploadMap(role RoleId, message easyjson.RawMessage) (err error) {119 var uploadedMap types.UploadMap120 err = uploadedMap.UnmarshalJSON(message)121 if err != nil {122 err = errors.Wrap(err, "in json.Unmarshal message into types.UploadMap: ")123 return124 }125 if role == 0 {126 if !r.User0UploadedCharacters {127 // uploadedMap.Weapons для клеток 13 12 11 10 9 8 7 6 5 4 3 2 1 0128 var numberOfFlags int129 for i := 0; i < 14; i++ {130 j := 13 - i131 var weapon Weapon132 weapon, err = NewWeapon(uploadedMap.Weapons[i])133 if err != nil {134 err = errors.Wrap(err, "in NewWeapon: ")135 return136 }137 if weapon == "flag" {138 numberOfFlags++139 }140 r.Map[j] = &Сharacter{141 Role: role,142 Weapon: weapon,143 }144 }145 if numberOfFlags != 1 {146 err = errors.New("map must contain exactly one flag, but " +147 strconv.Itoa(numberOfFlags) + " found")148 return149 }150 r.User0UploadedCharacters = true151 } else {152 err = errors.New("characters already loaded")153 return154 }155 } else {156 if !r.User1UploadedCharacters {157 // 28 29 30 31 32 33 34 35 36 37 38 39 40 41158 var numberOfFlags int159 for i := 0; i < 14; i++ {160 j := 28 + i161 var weapon Weapon162 weapon, err = NewWeapon(uploadedMap.Weapons[i])163 if err != nil {164 err = errors.Wrap(err, "in NewWeapon: ")165 return166 }167 if weapon == "flag" {168 numberOfFlags++169 }170 r.Map[j] = &Сharacter{171 Role: role,172 Weapon: weapon,173 }174 }175 if numberOfFlags != 1 {176 err = errors.New("map must contain exactly one flag, but " +177 strconv.Itoa(int(numberOfFlags)) + " found")178 return179 }180 r.User1UploadedCharacters = true181 } else {182 err = errors.New("characters already loaded")183 return184 }185 }186 if r.User0UploadedCharacters && r.User1UploadedCharacters {187 // Отсылает карту188 r.DownloadMap(0)189 r.DownloadMap(1)190 // Отсылает логин соперника191 r.YourRival(0)192 r.YourRival(1)193 // Отправляет чей ход194 r.YourTurn(0)195 r.YourTurn(1)196 }197 return198}199// ответственность: отправляет карту на клиент, не изменяет карту.200func (r *Room) DownloadMap(role RoleId) {201 downloadMap := types.DownloadMap{}202 for i := 0; i < len(r.Map); i++ {203 if r.Map[i] == nil {204 continue205 }206 var cell = &types.MapCell{}207 // true, если собственный персонаж208 cell.User = r.Map[i].Role == role209 // оружие видно только если это собственный игрок или противник показал оружие.210 if r.Map[i].Role == role || r.Map[i].ShowedWeapon {211 weapon := string(r.Map[i].Weapon)212 cell.Weapon = &weapon213 }214 downloadMap[i] = cell215 }216 if role == 0 {217 downloadMap.Rotate()218 }219 parameter, _ := downloadMap.MarshalJSON()220 response, _ := types.Event{221 Method: "download_map",222 Parameter: parameter,223 }.MarshalJSON()224 if role == 0 {225 r.Messaging.User0To <- response226 } else {227 r.Messaging.User1To <- response228 }229 return230}231// ответственность: отправляет описание соперника, не изменяет карту.232func (r *Room) YourRival(role RoleId) {233 if role == 0 {234 response, _ := types.YourRival(r.User1.Login).MarshalJSON()235 response, _ = types.Event{236 Method: "your_rival",237 Parameter: []byte(response),238 }.MarshalJSON()239 r.Messaging.User1To <- response240 } else {241 response, _ := types.YourRival(r.User0.Login).MarshalJSON()242 response, _ = types.Event{243 Method: "your_rival",244 Parameter: []byte(response),245 }.MarshalJSON()246 r.Messaging.User0To <- response247 }248 return249}250// ответственность: отправляет стат чей ход, не изменяет карту.251func (r *Room) YourTurn(role RoleId) {252 var response []byte253 if types.YourTurn(r.UserTurnNumber == role) {254 response = []byte("true")255 } else {256 response = []byte("false")257 }258 response, _ = types.Event{259 Method: "your_turn",260 Parameter: response,261 }.MarshalJSON()262 if role == 0 {263 r.Messaging.User0To <- response264 } else {265 r.Messaging.User1To <- response266 }267 return268}269// ответственность: принимает данные от пользователя, обрабатывает с учётом состояния,270// изменяет согласно игровой механике карту (фактически содержит всю игру в себе 😮)271// вызывает функции, отправляющие запросы.272func (r *Room) AttemptGoToCell(role RoleId, message easyjson.RawMessage) (gameOver bool, err error) {273 var attemptGoToCell types.AttemptGoToCell274 err = attemptGoToCell.UnmarshalJSON(message)275 if err != nil {276 err = errors.Wrap(err, "in json.Unmarshal message into types.attemptGoToCell: ")277 return278 }279 err = attemptGoToCell.Check()280 if err != nil {281 err = errors.Wrap(err, "invalid coordinates: ")282 return283 }284 if role == 0 {285 attemptGoToCell.Rotate()286 }287 gameOver, err = r.AttemptGoToCellLogic(role, attemptGoToCell.From, attemptGoToCell.To)288 return289}290func (r *Room) AttemptGoToCellLogic(role RoleId, from int, to int) (gameOver bool, err error) {291 // Что бы пользователю можно было сделать ход, нужно,292 // что бы персонажи были загружены обоими игроками,293 // не было спора про перевыбор оружия в данный момент неоконченного294 // и был ход этого игрока.295 if r.UserTurnNumber != role {296 err = errors.New("it's not your turn now")297 return298 }299 if !r.User0UploadedCharacters || !r.User1UploadedCharacters {300 err = errors.New("The map is not loaded yet. Wait for it.")301 return302 }303 if r.WeaponReElection.WaitingForIt {304 err = errors.New("At that moment you still need to reassign the weapon.")305 return306 }307 if r.Map[from] == nil {308 err = errors.New("there is no character at " + strconv.Itoa(from))309 return310 }311 if r.Map[from].Role != role {312 err = errors.New("this is not your character at " + strconv.Itoa(from))313 return314 }315 // Тут точно существующий персонаж, принадлежащий игроку.316 // Сервер смотрит, куда перемещается персонаж и, если целевая клетка пуста,317 // перемещает персонажа на сервере и клиентах.318 if r.Map[to] == nil {319 r.Map[to], r.Map[from] = r.Map[from], nil320 if r.UserTurnNumber == 0 {321 r.UserTurnNumber = 1322 } else {323 r.UserTurnNumber = 0324 }325 r.MoveCharacter(0, from, to)326 r.MoveCharacter(1, from, to)327 r.YourTurn(0)328 r.YourTurn(1)329 return330 }331 // если в целевой клетке ты332 if r.Map[to].Role == role {333 err = errors.New("attempt to attack yourself")334 return335 }336 // проверяем, нет ли там флага337 if r.Map[to].Weapon == "flag" {338 log.Print("game over in room = " + r.OwnNumber.String())339 r.Gameover(0, role, from, to)340 r.Gameover(1, role, from, to)341 gameOver = true342 // TODO: каскадный деструктор всего, но не раньше, чем отработают отправляющие сообщения горутины.343 // TODO: запись в базу о конце игры.344 return345 }346 // проверяем победу над обычным оружием.347 if r.Map[from].Weapon.IsExceed(r.Map[to].Weapon) {348 winnerWeapon := r.Map[from].Weapon349 loserWeapon := r.Map[to].Weapon350 // двигаем персонажа351 r.Map[to] = r.Map[from]352 r.Map[from] = nil353 // ставим, что оружие победителя спалилось.354 r.Map[to].ShowedWeapon = true355 // меняем ход // TODO: Возможно, стоит использовать bool в качестве роли.356 if r.UserTurnNumber == 0 {357 r.UserTurnNumber = 1358 } else {359 r.UserTurnNumber = 0360 }361 // отсылаем изменения.362 r.Attack(0, from, winnerWeapon, to, loserWeapon)363 r.Attack(1, from, winnerWeapon, to, loserWeapon)364 // отсылаем смену хода365 r.YourTurn(0)366 r.YourTurn(1)367 return368 }369 // проверяем поражение370 if r.Map[to].Weapon.IsExceed(r.Map[from].Weapon) {371 winnerWeapon := r.Map[to].Weapon372 loserWeapon := r.Map[from].Weapon373 // убираем проигравшего нападавшего персонажа, победитель передвигается на клетку проигравшего.374 r.Map[from] = nil375 // ставим, что оружие победителя спалилось.376 r.Map[to].ShowedWeapon = true377 // меняем ход378 if r.UserTurnNumber == 0 {379 r.UserTurnNumber = 1380 } else {381 r.UserTurnNumber = 0382 }383 // отсылаем изменения.384 r.Attack(0, to, winnerWeapon, from, loserWeapon)385 r.Attack(1, to, winnerWeapon, from, loserWeapon)386 // отсылаем смену хода387 r.YourTurn(0)388 r.YourTurn(1)389 return390 }391 // проверяем, что одинаковое оружие392 if r.Map[to].Weapon == r.Map[from].Weapon {393 fmt.Print(r.Map)394 // запускаем процедуру перевыбора.395 r.WeaponReElection.WaitingForIt = true396 r.WeaponReElection.User0ReElect = false397 r.WeaponReElection.User1ReElect = false398 r.WeaponReElection.AttackingCharacter = from399 r.WeaponReElection.AttackedCharacter = to400 // просим игроков перевыбрать оружие для своего персонажа, ход не меняется.401 if r.UserTurnNumber == 0 {402 r.WeaponChangeRequest(0, from)403 r.WeaponChangeRequest(1, to)404 } else {405 r.WeaponChangeRequest(1, from)406 r.WeaponChangeRequest(0, to)407 }408 return409 }410 return411}412// ответственность: проводит загружает перевыбранное оружие,413// вызывает AttemptGoToCell снова, как бужто перевыбора небыло.414func (r *Room) ReassignWeapons(role RoleId, message easyjson.RawMessage) (err error) {415 reassignWeapons := types.ReassignWeapons{}416 err = reassignWeapons.UnmarshalJSON(message)417 if err != nil {418 err = errors.Wrap(err, "parsing error: ")419 return420 }421 weapon, err := NewWeapon(reassignWeapons.NewWeapon)422 if err != nil {423 err = errors.Wrap(err, "incorrect weapon: ")424 return425 }426 if weapon == "flag" {427 err = errors.New("'flag' cannot be assigned during re-election.")428 return429 }430 // загрузка произойдёт, если сервер ждёт её, и этот игрок ещё не загрузил ничего.431 if !r.WeaponReElection.WaitingForIt {432 err = errors.New("there is no requirement to re-select a weapon at the moment.")433 return434 }435 if role == 0 {436 reassignWeapons.Rotate()437 if !r.WeaponReElection.User0ReElect {438 if r.UserTurnNumber == 0 {439 r.Map[r.WeaponReElection.AttackingCharacter].Weapon = weapon440 } else {441 r.Map[r.WeaponReElection.AttackedCharacter].Weapon = weapon442 }443 r.WeaponReElection.User0ReElect = true444 } else {445 err = errors.New("You have already downloaded the re-selection.")446 return447 }448 } else {449 if !r.WeaponReElection.User1ReElect {450 if r.UserTurnNumber != 0 {451 r.Map[r.WeaponReElection.AttackingCharacter].Weapon = weapon452 } else {453 r.Map[r.WeaponReElection.AttackedCharacter].Weapon = weapon454 }455 r.WeaponReElection.User1ReElect = true456 } else {457 err = errors.New("You have already downloaded the re-selection.")458 return459 }460 }461 if r.WeaponReElection.User0ReElect && r.WeaponReElection.User1ReElect {462 // то мы как будто бы проводим ход снова, как будто бы небыло перевыбора.463 r.WeaponReElection.WaitingForIt = false464 _, err = r.AttemptGoToCellLogic(r.UserTurnNumber, r.WeaponReElection.AttackingCharacter, r.WeaponReElection.AttackedCharacter)465 if err != nil {466 // Тут точно не должно быть ошибки, которую можно обработать кодом.467 fmt.Print(r.Map)468 panic(err)469 }470 }471 return472}473// ответственность: сформировать изменение для клиента, не изменяет карту.474// считает, что карта уже изменена. Вращает для нулевого игрока.475func (r *Room) MoveCharacter(role RoleId, from int, to int) {476 moveCharacter := types.MoveCharacter{477 From: from,478 To: to,479 }480 if role == 0 {481 moveCharacter.Rotate()482 }483 response, _ := moveCharacter.MarshalJSON()484 response, _ = types.Event{485 Method: "move_character",486 Parameter: response,487 }.MarshalJSON()488 if role == 0 {489 r.Messaging.User0To <- response490 } else {491 r.Messaging.User1To <- response492 }493 return494}495// ответственность: сборка изменения для клиента, не изменяет карту.496// считает, что карта уже изменена, поэтому не берёт ничего оттуда, там nil в качестве проигравшего.497// Вращает для нулевого игрока.498func (r *Room) Attack(role RoleId, winner int, winnerWeapon Weapon, loser int, loserWeapon Weapon) {499 attack := types.Attack{500 Winner: types.AttackingСharacter{501 Coordinates: winner,502 Weapon: string(winnerWeapon),503 },504 Loser: types.AttackingСharacter{505 Coordinates: loser,506 Weapon: string(loserWeapon),507 },508 }509 if role == 0 {510 attack.Rotate()511 }512 response, _ := attack.MarshalJSON()513 response, _ = types.Event{514 Method: "attack",515 Parameter: response,516 }.MarshalJSON()517 if role == 0 {518 r.Messaging.User0To <- response519 } else {520 r.Messaging.User1To <- response521 }522 return523}524// ответственность: сборка изменения для клиента, не изменяет карту.525// считает, что карта уже изменена. вращает для нулевого526func (r *Room) AddWeapon(role RoleId, coordinates int, weapon Weapon) {527 addWeapon := types.AddWeapon{528 Coordinates: coordinates,529 Weapon: string(weapon),530 }531 if role == 0 {532 addWeapon.Rotate()533 }534 response, _ := addWeapon.MarshalJSON()535 response, _ = types.Event{536 Method: "add_weapon",537 Parameter: response,538 }.MarshalJSON()539 if role == 0 {540 r.Messaging.User0To <- response541 } else {542 r.Messaging.User1To <- response543 }544 return545}546// ответственность: отправка запроса на перевыбор клиенту, не изменяет карту и состояния.547func (r *Room) WeaponChangeRequest(role RoleId, characterOfPlayer int) {548 weaponChangeRequest := types.WeaponChangeRequest{549 CharacterPosition: characterOfPlayer,550 }551 if role == 0 {552 weaponChangeRequest.Rotate()553 }554 response, _ := weaponChangeRequest.MarshalJSON()555 response, _ = types.Event{556 Method: "weapon_change_request",557 Parameter: response,558 }.MarshalJSON()559 if role == 0 {560 r.Messaging.User0To <- response561 } else {562 r.Messaging.User1To <- response563 }564 return565}566// ответственность: сборка изменения для клиента, не изменяет карту и не прекращает игру.567// считает, что карта уже изменена.568func (r *Room) Gameover(role RoleId, winnerRole RoleId, from int, to int) {569 gameover := types.GameOver{570 Winner: role == winnerRole,571 From: from,572 To: to,573 }574 if role == 0 {575 gameover.Rotate()576 }577 response, _ := gameover.MarshalJSON()578 response, _ = types.Event{579 Method: "gameover",580 Parameter: response,581 }.MarshalJSON()582 if role == 0 {583 r.Messaging.User0To <- response584 } else {585 r.Messaging.User1To <- response586 }587 return588}589// проблемы, почему не используются библиотеки:590// Stateful сервер: необходимо помнить роль, в которой работает пользователь,591// комнату, в которой присутствует пользователь.592// решено делать всё на событиях - клиет пересылает действия пользвателя,593// сервер декларативно присылает изменения, в такой форме, что бы они прямо вызывали анимации.594// сервер получает из одного из двух каналов запись.595// добавляет номер игрока....

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handlers.go

Source:handlers.go Github

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...66 w.WriteHeader(http.StatusBadRequest)67 response, _ := types.ServerResponse{68 Status: http.StatusText(http.StatusBadRequest),69 Message: "invalid_request_format",70 }.MarshalJSON()71 _, _ = w.Write(response)72 return73 }74 if registrationInfo.Login == "" {75 w.WriteHeader(http.StatusUnprocessableEntity)76 response, _ := types.ServerResponse{77 Status: http.StatusText(http.StatusUnprocessableEntity),78 Message: "empty_login",79 }.MarshalJSON()80 _, _ = w.Write(response)81 return82 }83 if len(registrationInfo.Password) < 5 {84 w.WriteHeader(http.StatusUnprocessableEntity)85 response, _ := types.ServerResponse{86 Status: http.StatusText(http.StatusUnprocessableEntity),87 Message: "weak_password",88 }.MarshalJSON()89 _, _ = w.Write(response)90 return91 }92 userID, isDuplicate, err := e.DB.InsertIntoUser(registrationInfo.Login, defaultAvatarURL, false)93 if isDuplicate {94 w.WriteHeader(http.StatusConflict)95 response, _ := types.ServerResponse{96 Status: http.StatusText(http.StatusConflict),97 Message: "login_is_not_unique",98 }.MarshalJSON()99 _, _ = w.Write(response)100 return101 }102 if err != nil {103 w.WriteHeader(http.StatusInternalServerError)104 response, _ := types.ServerResponse{105 Status: http.StatusText(http.StatusInternalServerError),106 Message: "database_error",107 }.MarshalJSON()108 _, _ = w.Write(response)109 return110 }111 err = e.DB.InsertIntoRegularLoginInformation(userID, sha256hash(registrationInfo.Password))112 if err != nil {113 log.Print(err)114 w.WriteHeader(http.StatusInternalServerError)115 response, _ := types.ServerResponse{116 Status: http.StatusText(http.StatusInternalServerError),117 Message: "database_error",118 }.MarshalJSON()119 _, _ = w.Write(response)120 return121 }122 err = e.DB.InsertIntoGameStatistics(userID, 0, 0)123 if err != nil {124 log.Print(err)125 w.WriteHeader(http.StatusInternalServerError)126 response, _ := types.ServerResponse{127 Status: http.StatusText(http.StatusInternalServerError),128 Message: "database_error",129 }.MarshalJSON()130 _, _ = w.Write(response)131 return132 }133 // создаём токены авторизации.134 authorizationToken := randomToken()135 err = e.DB.UpsertIntoCurrentLogin(userID, authorizationToken)136 if err != nil {137 log.Print(err)138 w.WriteHeader(http.StatusInternalServerError)139 response, _ := types.ServerResponse{140 Status: http.StatusText(http.StatusInternalServerError),141 Message: "database_error",142 }.MarshalJSON()143 _, _ = w.Write(response)144 return145 }146 // Отсылаем нормальный ответ.147 http.SetCookie(w, &http.Cookie{148 Name: "SessionId",149 Value: authorizationToken,150 Path: "/",151 Expires: time.Now().AddDate(0, 0, 7),152 Secure: true,153 HttpOnly: true,154 SameSite: http.SameSiteLaxMode,155 })156 w.WriteHeader(http.StatusCreated)157 response, _ := types.ServerResponse{158 Status: http.StatusText(http.StatusCreated),159 Message: "successful_reusable_registration",160 }.MarshalJSON()161 _, _ = w.Write(response)162}163// RegistrationTemporary godoc164// @Summary Temporary user registration.165// @Description Сreates user without statistics and password, stub so that you can play 1 session without creating an account.166// @Tags user167// @Accept application/json168// @Produce application/json169// @Param registrationInfo body types.NewUserRegistration true "login password"170// @Success 200 {object} types.ServerResponse171// @Failure 500 {object} types.ServerResponse172// @Router /api/v1/user&temporary=true [post]173func (e *Environment) RegistrationTemporary(w http.ResponseWriter, r *http.Request) {174 w.Header().Set("Content-Type", "application/json")175 bodyBytes, err := ioutil.ReadAll(r.Body)176 _ = r.Body.Close()177 registrationInfo := types.NewUserRegistration{}178 err = registrationInfo.UnmarshalJSON(bodyBytes)179 if err != nil {180 w.WriteHeader(http.StatusBadRequest)181 response, _ := types.ServerResponse{182 Status: http.StatusText(http.StatusBadRequest),183 Message: "invalid_request_format",184 }.MarshalJSON()185 _, _ = w.Write(response)186 return187 }188 if registrationInfo.Login == "" {189 w.WriteHeader(http.StatusUnprocessableEntity)190 response, _ := types.ServerResponse{191 Status: http.StatusText(http.StatusUnprocessableEntity),192 Message: "empty_login",193 }.MarshalJSON()194 _, _ = w.Write(response)195 return196 }197 userID, isDuplicate, err := e.DB.InsertIntoUser(registrationInfo.Login, defaultAvatarURL, true)198 if isDuplicate {199 w.WriteHeader(http.StatusConflict)200 response, _ := types.ServerResponse{201 Status: http.StatusText(http.StatusConflict),202 Message: "login_is_not_unique",203 }.MarshalJSON()204 _, _ = w.Write(response)205 return206 }207 if err != nil {208 log.Print(err)209 w.WriteHeader(http.StatusInternalServerError)210 response, _ := types.ServerResponse{211 Status: http.StatusText(http.StatusInternalServerError),212 Message: "database_error",213 }.MarshalJSON()214 _, _ = w.Write(response)215 return216 }217 // создаём токены авторизации.218 authorizationToken := randomToken()219 err = e.DB.UpsertIntoCurrentLogin(userID, authorizationToken)220 if err != nil {221 log.Print(err)222 w.WriteHeader(http.StatusInternalServerError)223 response, _ := types.ServerResponse{224 Status: http.StatusText(http.StatusInternalServerError),225 Message: "database_error",226 }.MarshalJSON()227 _, _ = w.Write(response)228 return229 }230 http.SetCookie(w, &http.Cookie{231 Name: "SessionId",232 Value: authorizationToken,233 Path: "/",234 Expires: time.Now().AddDate(0, 0, 7),235 Secure: true,236 HttpOnly: true,237 SameSite: http.SameSiteLaxMode,238 })239 w.WriteHeader(http.StatusCreated)240 response, _ := types.ServerResponse{241 Status: http.StatusText(http.StatusCreated),242 Message: "successful_disposable_registration",243 }.MarshalJSON()244 _, _ = w.Write(response)245}246// LeaderBoard godoc247// @Summary Get liderboard with best user information.248// @Description Return login, avatarAddress, gamesPlayed and wins information for earch user.249// @Tags users250// @Accept application/json251// @Produce application/json252// @Param limit query int false "Lenth of returning user list."253// @Param offset query int false "Offset relative to the leader."254// @Success 200 {array} accessor.PublicUserInformation255// @Failure 500 {object} types.ServerResponse256// @Router /api/v1/users [get]257func (e *Environment) LeaderBoard(w http.ResponseWriter, r *http.Request) {258 w.Header().Set("Content-Type", "application/json")259 getParams := r.URL.Query()260 _ = r.Body.Close()261 limit := 20262 if customLimitStrings, ok := getParams["limit"]; ok {263 if len(customLimitStrings) == 1 {264 if customLimitInt, err := strconv.Atoi(customLimitStrings[0]); err == nil {265 limit = customLimitInt266 }267 }268 }269 offset := 0270 if customOffsetStrings, ok := getParams["offset"]; ok {271 if len(customOffsetStrings) == 1 {272 if customOffsetInt, err := strconv.Atoi(customOffsetStrings[0]); err == nil {273 offset = customOffsetInt274 }275 }276 }277 LeaderBoard, err := e.DB.SelectLeaderBoard(limit, offset)278 if err != nil {279 log.Print(err)280 w.WriteHeader(http.StatusInternalServerError)281 response, _ := types.ServerResponse{282 Status: http.StatusText(http.StatusInternalServerError),283 Message: "database_error",284 }.MarshalJSON()285 _, _ = w.Write(response)286 return287 }288 w.WriteHeader(http.StatusOK)289 response, _ := LeaderBoard.MarshalJSON()290 _, _ = w.Write(response)291}292// UserProfile godoc293// @Summary Get user information.294// @Description Return login, avatarAddress, gamesPlayed, wins, information.295// @Tags user296// @Accept application/json297// @Produce application/json298// @Param login query string true "login password"299// @Success 200 {object} accessor.PublicUserInformation300// @Failure 422 {object} types.ServerResponse301// @Failure 500 {object} types.ServerResponse302// @Router /api/v1/user [get]303func (e *Environment) UserProfile(w http.ResponseWriter, r *http.Request) {304 getParams := r.URL.Query()305 _ = r.Body.Close()306 login := ""307 if loginStrings, ok := getParams["login"]; ok {308 if len(loginStrings) == 1 {309 login = loginStrings[0]310 if login != "" {311 // just working on312 } else {313 w.WriteHeader(http.StatusUnprocessableEntity)314 response, _ := types.ServerResponse{315 Status: http.StatusText(http.StatusUnprocessableEntity),316 Message: "empty_login_field",317 }.MarshalJSON()318 _, _ = w.Write(response)319 return320 }321 } else {322 w.WriteHeader(http.StatusUnprocessableEntity)323 response, _ := types.ServerResponse{324 Status: http.StatusText(http.StatusUnprocessableEntity),325 Message: "login_must_be_only_1",326 }.MarshalJSON()327 _, _ = w.Write(response)328 return329 }330 } else {331 w.WriteHeader(http.StatusUnprocessableEntity)332 response, _ := types.ServerResponse{333 Status: http.StatusText(http.StatusUnprocessableEntity),334 Message: "field_login_required",335 }.MarshalJSON()336 _, _ = w.Write(response)337 return338 }339 userProfile, err := e.DB.SelectUserByLogin(login)340 if err != nil {341 log.Print(err)342 w.WriteHeader(http.StatusInternalServerError)343 response, _ := types.ServerResponse{344 Status: http.StatusText(http.StatusInternalServerError),345 Message: "database_error",346 }.MarshalJSON()347 _, _ = w.Write(response)348 return349 }350 w.WriteHeader(http.StatusOK)351 response, _ := userProfile.MarshalJSON()352 _, _ = w.Write(response)353}354// Login godoc355// @Summary Login into account.356// @Description Set cookie on client and save them in database.357// @Tags session358// @Accept application/json359// @Produce application/json360// @Param registrationInfo body types.NewUserRegistration true "login password"361// @Success 202 {object} types.ServerResponse362// @Failure 400 {object} types.ServerResponse363// @Failure 403 {object} types.ServerResponse364// @Failure 500 {object} types.ServerResponse365// @Router /api/v1/session [post]366func (e *Environment) Login(w http.ResponseWriter, r *http.Request) {367 w.Header().Set("Content-Type", "application/json")368 bodyBytes, err := ioutil.ReadAll(r.Body)369 _ = r.Body.Close()370 registrationInfo := types.NewUserRegistration{}371 err = registrationInfo.UnmarshalJSON(bodyBytes)372 if err != nil {373 w.WriteHeader(http.StatusBadRequest)374 response, _ := types.ServerResponse{375 Status: http.StatusText(http.StatusBadRequest),376 Message: "invalid_request_format",377 }.MarshalJSON()378 _, _ = w.Write(response)379 return380 }381 exists, userId, err := e.DB.SelectUserIdByLoginPasswordHash(registrationInfo.Login, sha256hash(registrationInfo.Password))382 if err != nil {383 log.Print(err)384 w.WriteHeader(http.StatusInternalServerError)385 response, _ := types.ServerResponse{386 Status: http.StatusText(http.StatusInternalServerError),387 Message: "database_error",388 }.MarshalJSON()389 _, _ = w.Write(response)390 return391 }392 if exists {393 authorizationToken := randomToken()394 err = e.DB.UpsertIntoCurrentLogin(userId, authorizationToken)395 if err != nil {396 log.Print(err)397 w.WriteHeader(http.StatusInternalServerError)398 response, _ := types.ServerResponse{399 Status: http.StatusText(http.StatusInternalServerError),400 Message: "database_error",401 }.MarshalJSON()402 _, _ = w.Write(response)403 return404 }405 // Уже нормальный ответ отсылаем.406 http.SetCookie(w, &http.Cookie{407 Name: "SessionId",408 Value: authorizationToken,409 Path: "/",410 Expires: time.Now().AddDate(0, 0, 7),411 Secure: true,412 HttpOnly: true,413 SameSite: http.SameSiteLaxMode,414 })415 w.WriteHeader(http.StatusAccepted)416 response, _ := types.ServerResponse{417 Status: http.StatusText(http.StatusAccepted),418 Message: "successful_password_login",419 }.MarshalJSON()420 _, _ = w.Write(response)421 } else {422 w.WriteHeader(http.StatusForbidden)423 response, _ := types.ServerResponse{424 Status: http.StatusText(http.StatusFailedDependency),425 Message: "wrong_login_or_password",426 }.MarshalJSON()427 _, _ = w.Write(response)428 }429}430// Logout godoc431// @Summary Log registered user out.432// @Description Delete cookie in client and database.433// @Tags session434// @Accept application/json435// @Produce application/json436// @Success 200 {object} types.ServerResponse437// @Failure 404 {object} types.ServerResponse438// @Failure 401 {object} types.ServerResponse439// @Router /api/v1/session [delete]440func (e *Environment) Logout(w http.ResponseWriter, r *http.Request) {441 //get sid from cookies442 inCookie, err := r.Cookie("SessionId")443 if err != nil {444 log.Print(err)445 w.WriteHeader(http.StatusUnauthorized)446 response, _ := types.ServerResponse{447 Status: http.StatusText(http.StatusUnauthorized),448 Message: "unauthorized_user",449 }.MarshalJSON()450 _, _ = w.Write(response)451 return452 }453 err = e.DB.DropUsersSession(inCookie.Value)454 if err != nil {455 log.Print(err)456 w.WriteHeader(http.StatusNotFound)457 response, _ := types.ServerResponse{458 Status: http.StatusText(http.StatusNotFound),459 Message: "target_session_not_found",460 }.MarshalJSON()461 _, _ = w.Write(response)462 return463 }464 http.SetCookie(w, &http.Cookie{465 Name: "SessionId",466 Expires: time.Unix(0, 0),467 Secure: true,468 HttpOnly: true,469 SameSite: http.SameSiteLaxMode,470 })471 w.WriteHeader(http.StatusOK)472 response, _ := types.ServerResponse{473 Status: http.StatusText(http.StatusOK),474 Message: "successful_logout",475 }.MarshalJSON()476 _, _ = w.Write(response)477}478// Logout godoc479// @Summary Upload user avatar.480// @Description Upload avatar from \<form enctype='multipart/form-data' action='/api/v1/avatar'>\<input type="file" name="avatar"></form>.481// @Tags avatar482// @Accept multipart/form-data483// @Produce application/json484// @Success 201 {object} types.ServerResponse485// @Failure 400 {object} types.ServerResponse486// @Failure 401 {object} types.ServerResponse487// @Failure 500 {object} types.ServerResponse488// @Router /api/v1/avatar [post]489func (e *Environment) SetAvatar(w http.ResponseWriter, r *http.Request) {490 defer func() { _ = r.Body.Close() }()491 w.Header().Set("Content-Type", "application/json")492 //get SessionId from cookies493 cookie, err := r.Cookie("SessionId")494 if err != nil || cookie.Value == "" {495 log.Print(err)496 w.WriteHeader(http.StatusForbidden)497 response, _ := types.ServerResponse{498 Status: http.StatusText(http.StatusForbidden),499 Message: "unauthorized_user",500 }.MarshalJSON()501 _, _ = w.Write(response)502 return503 }504 exist, user, err := e.DB.SelectUserBySessionId(cookie.Value)505 if err != nil {506 log.Print(err)507 w.WriteHeader(http.StatusInternalServerError)508 response, _ := types.ServerResponse{509 Status: http.StatusText(http.StatusInternalServerError),510 Message: "cannot_create_file",511 }.MarshalJSON()512 _, _ = w.Write(response)513 return514 }515 if !exist {516 w.WriteHeader(http.StatusForbidden)517 response, _ := types.ServerResponse{518 Status: http.StatusText(http.StatusForbidden),519 Message: "unauthorized_user",520 }.MarshalJSON()521 _, _ = w.Write(response)522 return523 }524 err = r.ParseMultipartForm(0)525 if err != nil {526 log.Print("handlers SetAvatar ParseMultipartForm: " + err.Error())527 return528 }529 file, handler, err := r.FormFile("avatar")530 if err != nil {531 fmt.Println(err)532 w.WriteHeader(http.StatusBadRequest)533 response, _ := types.ServerResponse{534 Status: http.StatusText(http.StatusBadRequest),535 Message: "cannot_get_file",536 }.MarshalJSON()537 _, _ = w.Write(response)538 return539 }540 defer func() { _ = file.Close() }()541 // /var/www/media/images/login.jpeg542 fileName := user.Login + filepath.Ext(handler.Filename)543 f, err := os.Create(*e.Config.ImagesRoot + "/" + fileName)544 if err != nil {545 fmt.Println(err)546 w.WriteHeader(http.StatusInternalServerError)547 response, _ := types.ServerResponse{548 Status: http.StatusText(http.StatusInternalServerError),549 Message: "cannot_create_file",550 }.MarshalJSON()551 _, _ = w.Write(response)552 return553 }554 defer func() { _ = f.Close() }()555 //put avatar path to db556 err = e.DB.UpdateUsersAvatarByLogin(user.Login, "/media/images/"+fileName)557 if err != nil {558 log.Print(err)559 w.WriteHeader(http.StatusInternalServerError)560 response, _ := types.ServerResponse{561 Status: http.StatusText(http.StatusInternalServerError),562 Message: "database_error",563 }.MarshalJSON()564 _, _ = w.Write(response)565 return566 }567 _, _ = io.Copy(f, file)568 w.WriteHeader(http.StatusCreated)569 response, _ := types.ServerResponse{570 Status: http.StatusText(http.StatusCreated),571 Message: "successful_avatar_uploading",572 }.MarshalJSON()573 _, _ = w.Write(response)574}575func (e *Environment) ErrorMethodNotAllowed(w http.ResponseWriter, r *http.Request) {576 _ = r.Body.Close()577 w.WriteHeader(http.StatusMethodNotAllowed)578 response, _ := types.ServerResponse{579 Status: http.StatusText(http.StatusMethodNotAllowed),580 Message: "this_method_is_not_supported",581 }.MarshalJSON()582 _, _ = w.Write(response)583}584func (e *Environment) ErrorRequiredField(w http.ResponseWriter, r *http.Request) {585 _ = r.Body.Close()586 w.WriteHeader(http.StatusBadRequest)587 response, _ := types.ServerResponse{588 Status: http.StatusText(http.StatusBadRequest),589 Message: "field_'temporary'_required",590 }.MarshalJSON()591 _, _ = w.Write(response)592}...

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Source:encoding.go Github

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...44 leg.ArrivalTime = x.EncArrivalTime.Time()45 leg.DepartureTime = x.EncDepartureTime.Time()46 return nil47}48// MarshalJSON implements json.Marshaler for Leg. This encodes Go types back to49// the API representation.50func (leg *Leg) MarshalJSON() ([]byte, error) {51 x := encodedLeg{}52 x.safeLeg = safeLeg(*leg)53 x.EncDuration = internal.NewDuration(leg.Duration)54 x.EncDurationInTraffic = internal.NewDuration(leg.DurationInTraffic)55 x.EncArrivalTime = internal.NewDateTime(leg.ArrivalTime)56 x.EncDepartureTime = internal.NewDateTime(leg.DepartureTime)57 return json.Marshal(x)58}59// safeStep is a raw version of Step that does not have custom encoding or60// decoding methods applied.61type safeStep Step62// encodedStep is the actual encoded version of Step as per the Maps APIs.63type encodedStep struct {64 safeStep65 EncDuration *internal.Duration `json:"duration"`66}67// UnmarshalJSON implements json.Unmarshaler for Step. This decodes the API68// representation into types useful for Go developers.69func (step *Step) UnmarshalJSON(data []byte) error {70 x := encodedStep{}71 err := json.Unmarshal(data, &x)72 if err != nil {73 return err74 }75 *step = Step(x.safeStep)76 step.Duration = x.EncDuration.Duration()77 return nil78}79// MarshalJSON implements json.Marshaler for Step. This encodes Go types back to80// the API representation.81func (step *Step) MarshalJSON() ([]byte, error) {82 x := encodedStep{}83 x.safeStep = safeStep(*step)84 x.EncDuration = internal.NewDuration(step.Duration)85 return json.Marshal(x)86}87// safeTransitDetails is a raw version of TransitDetails that does not have88// custom encoding or decoding methods applied.89type safeTransitDetails TransitDetails90// encodedTransitDetails is the actual encoded version of TransitDetails as per91// the Maps APIs92type encodedTransitDetails struct {93 safeTransitDetails94 EncArrivalTime *internal.DateTime `json:"arrival_time"`95 EncDepartureTime *internal.DateTime `json:"departure_time"`96}97// UnmarshalJSON implements json.Unmarshaler for TransitDetails. This decodes98// the API representation into types useful for Go developers.99func (transitDetails *TransitDetails) UnmarshalJSON(data []byte) error {100 x := encodedTransitDetails{}101 err := json.Unmarshal(data, &x)102 if err != nil {103 return err104 }105 *transitDetails = TransitDetails(x.safeTransitDetails)106 transitDetails.ArrivalTime = x.EncArrivalTime.Time()107 transitDetails.DepartureTime = x.EncDepartureTime.Time()108 return nil109}110// MarshalJSON implements json.Marshaler for TransitDetails. This encodes Go111// types back to the API representation.112func (transitDetails *TransitDetails) MarshalJSON() ([]byte, error) {113 x := encodedTransitDetails{}114 x.safeTransitDetails = safeTransitDetails(*transitDetails)115 x.EncArrivalTime = internal.NewDateTime(transitDetails.ArrivalTime)116 x.EncDepartureTime = internal.NewDateTime(transitDetails.DepartureTime)117 return json.Marshal(x)118}119// safeTransitLine is the raw version of TransitLine that does not have custom120// encoding or decoding methods applied.121type safeTransitLine TransitLine122// encodedTransitLine is the actual encoded version of TransitLine as per the123// Maps APIs124type encodedTransitLine struct {125 safeTransitLine126 EncURL string `json:"url"`127 EncIcon string `json:"icon"`128}129// UnmarshalJSON imlpements json.Unmarshaler for TransitLine. This decodes the130// API representation into types useful for Go developers.131func (transitLine *TransitLine) UnmarshalJSON(data []byte) error {132 x := encodedTransitLine{}133 err := json.Unmarshal(data, &x)134 if err != nil {135 return err136 }137 *transitLine = TransitLine(x.safeTransitLine)138 transitLine.URL, err = url.Parse(x.EncURL)139 if err != nil {140 return err141 }142 transitLine.Icon, err = url.Parse(x.EncIcon)143 if err != nil {144 return err145 }146 return nil147}148// MarshalJSON implements json.Marshaler for TransitLine. This encodes Go149// types back to the API representation.150func (transitLine *TransitLine) MarshalJSON() ([]byte, error) {151 x := encodedTransitLine{}152 x.safeTransitLine = safeTransitLine(*transitLine)153 x.EncURL = transitLine.URL.String()154 x.EncIcon = transitLine.Icon.String()155 return json.Marshal(x)156}157// safeTransitAgency is the raw version of TransitAgency that does not have158// custom encoding or decoding methods applied.159type safeTransitAgency TransitAgency160// encodedTransitAgency is the actual encoded version of TransitAgency as per the161// Maps APIs162type encodedTransitAgency struct {163 safeTransitAgency164 EncURL string `json:"url"`165}166// UnmarshalJSON imlpements json.Unmarshaler for TransitAgency. This decodes the167// API representation into types useful for Go developers.168func (transitAgency *TransitAgency) UnmarshalJSON(data []byte) error {169 x := encodedTransitAgency{}170 err := json.Unmarshal(data, &x)171 if err != nil {172 return err173 }174 *transitAgency = TransitAgency(x.safeTransitAgency)175 transitAgency.URL, err = url.Parse(x.EncURL)176 if err != nil {177 return err178 }179 return nil180}181// MarshalJSON implements json.Marshaler for TransitAgency. This encodes Go182// types back to the API representation.183func (transitAgency *TransitAgency) MarshalJSON() ([]byte, error) {184 x := encodedTransitAgency{}185 x.safeTransitAgency = safeTransitAgency(*transitAgency)186 x.EncURL = transitAgency.URL.String()187 return json.Marshal(x)188}189// safeTransitLineVehicle is the raw version of TransitLineVehicle that does not190// have custom encoding or decoding methods applied.191type safeTransitLineVehicle TransitLineVehicle192// encodedTransitLineVehicle is the actual encoded version of TransitLineVehicle193// as per the Maps APIs194type encodedTransitLineVehicle struct {195 safeTransitLineVehicle196 EncIcon string `json:"icon"`197}198// UnmarshalJSON imlpements json.Unmarshaler for TransitLineVehicle. This199// decodes the API representation into types useful for Go developers.200func (transitLineVehicle *TransitLineVehicle) UnmarshalJSON(data []byte) error {201 x := encodedTransitLineVehicle{}202 err := json.Unmarshal(data, &x)203 if err != nil {204 return err205 }206 *transitLineVehicle = TransitLineVehicle(x.safeTransitLineVehicle)207 transitLineVehicle.Icon, err = url.Parse(x.EncIcon)208 if err != nil {209 return err210 }211 return nil212}213// MarshalJSON implements json.Marshaler for TransitLineVehicle. This encodes214// Go types back to the API representation.215func (transitLineVehicle *TransitLineVehicle) MarshalJSON() ([]byte, error) {216 x := encodedTransitLineVehicle{}217 x.safeTransitLineVehicle = safeTransitLineVehicle(*transitLineVehicle)218 x.EncIcon = transitLineVehicle.Icon.String()219 return json.Marshal(x)220}221// safeDistanceMatrixElement is a raw version of DistanceMatrixElement that222// does not have custom encoding or decoding methods applied.223type safeDistanceMatrixElement DistanceMatrixElement224// encodedDistanceMatrixElement is the actual encoded version of225// DistanceMatrixElement as per the Maps APIs.226type encodedDistanceMatrixElement struct {227 safeDistanceMatrixElement228 EncDuration *internal.Duration `json:"duration"`229 EncDurationInTraffic *internal.Duration `json:"duration_in_traffic"`230}231// UnmarshalJSON implements json.Unmarshaler for DistanceMatrixElement. This232// decodes the API representation into types useful for Go developers.233func (dme *DistanceMatrixElement) UnmarshalJSON(data []byte) error {234 x := encodedDistanceMatrixElement{}235 err := json.Unmarshal(data, &x)236 if err != nil {237 return err238 }239 *dme = DistanceMatrixElement(x.safeDistanceMatrixElement)240 dme.Duration = x.EncDuration.Duration()241 dme.DurationInTraffic = x.EncDurationInTraffic.Duration()242 return nil243}244// MarshalJSON implements json.Marshaler for DistanceMatrixElement. This encodes245// Go types back to the API representation.246func (dme *DistanceMatrixElement) MarshalJSON() ([]byte, error) {247 x := encodedDistanceMatrixElement{}248 x.safeDistanceMatrixElement = safeDistanceMatrixElement(*dme)249 x.EncDuration = internal.NewDuration(dme.Duration)250 return json.Marshal(x)251}252// safeSnappedPoint is a raw version of SnappedPoint that does not have custom253// encoding or decoding methods applied.254type safeSnappedPoint SnappedPoint255// encodedSnappedPoint is the actual encoded version of SnappedPoint as per the256// Roads API.257type encodedSnappedPoint struct {258 safeSnappedPoint259 EncLocation internal.Location `json:"location"`260}261// UnmarshalJSON implements json.Unmarshaler for SnappedPoint. This decode the262// API representation into types useful for Go developers.263func (sp *SnappedPoint) UnmarshalJSON(data []byte) error {264 x := encodedSnappedPoint{}265 err := json.Unmarshal(data, &x)266 if err != nil {267 return err268 }269 *sp = SnappedPoint(x.safeSnappedPoint)270 sp.Location.Lat = x.EncLocation.Latitude271 sp.Location.Lng = x.EncLocation.Longitude272 return nil273}274// MarshalJSON implements json.Marshaler for SnappedPoint. This encodes Go275// types back to the API representation.276func (sp *SnappedPoint) MarshalJSON() ([]byte, error) {277 x := encodedSnappedPoint{}278 x.safeSnappedPoint = safeSnappedPoint(*sp)279 x.EncLocation.Latitude = sp.Location.Lat280 x.EncLocation.Longitude = sp.Location.Lng281 return json.Marshal(x)282}...

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MarshalJSON

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1import (2type Person struct {3}4func (p Person) MarshalJSON() ([]byte, error) {5 return json.Marshal(struct {6 }{7 })8}9func main() {10 p := Person{11 }12 b, err := json.Marshal(p)13 if err != nil {14 fmt.Println(err)15 }16 fmt.Println(string(b))17}18{"Name":"John","Age":30}19import (20type Person struct {21}22func (p *Person) UnmarshalJSON(data []byte) error {23 var v struct {

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1import (2type User struct {3}4func (u User) MarshalJSON() ([]byte, error) {5 return json.Marshal(struct {6 }{7 })8}9func main() {10 u := User{Name: "John", Age: 30}11 b, err := json.Marshal(u)12 if err != nil {13 fmt.Println(err)14 }15 fmt.Println(string(b))16}17{"Name":"John","Age":30}18Example 2: UnmarshalJSON() method19import (20type User struct {21}22func (u *User) UnmarshalJSON(b []byte) error {23 aux := &struct {24 }{25 Alias: (*Alias)(u),26 }27 return json.Unmarshal(b, &aux)28}29func main() {30 u := User{}31 b := []byte(`{"Name":"John","Age":30}`)32 err := json.Unmarshal(b, &u)33 if err != nil {34 fmt.Println(err)35 }36 fmt.Println(u)37}38{John 30}39Example 3: MarshalText() method40import (41type User struct {42}43func (u User) MarshalText() ([]byte, error) {44 return []byte(fmt.Sprintf("%s is %d years old", u.Name, u.Age)), nil45}46func main() {47 u := User{Name: "John", Age: 30}48 b, err := json.Marshal(u)49 if err != nil {50 fmt.Println(err)51 }52 fmt.Println(string(b))53}54Example 4: UnmarshalText() method

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1func main() {2 s := Student{3 }4 b, err := json.Marshal(s)5 if err != nil {6 fmt.Println(err)7 }8 fmt.Println(string(b))9}10func main() {11 err := json.Unmarshal([]byte(`{"Name":"John","Age":23}`), &s)12 if err != nil {13 fmt.Println(err)14 }15 fmt.Println(s)16}17func main() {18 s := Student{19 }20 b, err := json.Marshal(s)21 if err != nil {22 fmt.Println(err)23 }24 fmt.Println(string(b))25}26func main() {27 err := json.Unmarshal([]byte(`{"Name":"John","Age":23}`), &s)28 if err != nil {29 fmt.Println(err)30 }31 fmt.Println(s)32}33func main() {34 s := Student{35 }36 b, err := json.Marshal(s)37 if err != nil {38 fmt.Println(err)39 }40 fmt.Println(string(b))41}42func main() {43 err := json.Unmarshal([]byte(`{"Name":"John","Age":23}`), &s)44 if err != nil {45 fmt.Println(err)46 }47 fmt.Println(s)48}49func main() {50 s := Student{51 }52 b, err := json.Marshal(s)53 if err != nil {54 fmt.Println(err)55 }56 fmt.Println(string(b))57}

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1data, err = json.Marshal(types)2if err != nil {3 fmt.Println("error:", err)4}5fmt.Println(string(data))6err = json.Unmarshal([]byte(data), &types)7if err != nil {8 fmt.Println("error:", err)9}10fmt.Println(types)11data, err = json.Marshal(type)12if err != nil {13 fmt.Println("error:", err)14}15fmt.Println(string(data))16err = json.Unmarshal([]byte(data), &type)17if err != nil {18 fmt.Println("error:", err)19}20fmt.Println(type)21data, err = json.Marshal(type)22if err != nil {23 fmt.Println("error:", err)24}25fmt.Println(string(data))26err = json.Unmarshal([]byte(data), &type)27if err != nil {28 fmt.Println("error:", err)29}30fmt.Println(type)31data, err = json.Marshal(type)32if err != nil {33 fmt.Println("error:", err)34}35fmt.Println(string(data))36err = json.Unmarshal([]byte(data), &type)37if err != nil {38 fmt.Println("error:", err)39}40fmt.Println(type)41data, err = json.Marshal(type)42if err != nil {43 fmt.Println("error:", err)44}45fmt.Println(string(data))

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1import (2type Person struct {3}4func main() {5 p := Person{"John", 21}6 fmt.Println(string(p.MarshalJSON()))7 fmt.Println(string(json.Marshal(p)))8}9{"Name":"John","Age":21}10{"Name":"John","Age":

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1func main() {2 p1 := Person{3 }4 bs, _ := json.Marshal(p1)5 fmt.Println(string(bs))6}7{"FirstName":"John","LastName":"Smith","Age":25}

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1func main() {2 types := &types{3 }4 jsonStr, _ := json.Marshal(types)5 fmt.Println(string(jsonStr))6}7{"name":"test","age":10}8func main() {9 types := &types{10 }11 jsonStr, _ := json.MarshalIndent(types, "", " ")12 fmt.Println(string(jsonStr))13}14{15}16func main() {17 types := &types{18 }19 jsonStr, _ := json.Marshal(types)20 fmt.Println(string(jsonStr))21}22{"name":"test","age":10}23func main() {24 types := &types{25 }

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