bipbop-microservices
Version:
Utilização dos serviços da BIPBOP em JS
298 lines • 14.6 kB
JavaScript
"use strict";
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
var jspack_1 = require("jspack");
var jsonschema_1 = require("jsonschema");
var ReceiveSchema_1 = require("./ReceiveSchema");
var ResponseError_1 = require("./ResponseError");
var ApplicationState;
(function (ApplicationState) {
ApplicationState[ApplicationState["Connected"] = 0] = "Connected";
ApplicationState[ApplicationState["ClientSendingJSONSize"] = 1] = "ClientSendingJSONSize";
ApplicationState[ApplicationState["ClientSendingJSON"] = 2] = "ClientSendingJSON";
ApplicationState[ApplicationState["Processing"] = 3] = "Processing";
ApplicationState[ApplicationState["Disconnecting"] = 4] = "Disconnecting";
ApplicationState[ApplicationState["Disconnected"] = 5] = "Disconnected";
})(ApplicationState = exports.ApplicationState || (exports.ApplicationState = {}));
var Client = /** @class */ (function () {
function Client(client, configuration) {
var _this = this;
this.client = client;
this.configuration = configuration;
this.state = {
ApplicationState: ApplicationState.Connected,
ApplicationNextState: ApplicationState.ClientSendingJSONSize,
ExpectedBytes: 4,
Chunks: []
};
this.dataReceiver = function (buffer) { return _this.receiveData(buffer); };
this.client.on('error', function (e) {
_this.disconnectError(e);
_this.configuration.hookError(_this.client, e);
});
this.client.on('data', this.dataReceiver);
this.client.on('close', function () { return _this.changeState(ApplicationState.Disconnected); });
this.setTimeout();
}
Client.prototype.clearTimeout = function () {
if (this.timeout)
clearTimeout(this.timeout);
};
Client.prototype.setTimeout = function () {
var _this = this;
this.clearTimeout();
if (!this.isConnected())
return;
this.timeout = setTimeout(function () {
_this.disconnectClient();
}, this.configuration.timeout);
};
Client.prototype.changeState = function (state, expectedBytes, expectedNextState) {
if (expectedBytes === void 0) { expectedBytes = 0; }
this.state.ApplicationState = state;
this.state.ExpectedBytes = expectedBytes;
this.state.ApplicationNextState = expectedNextState || state;
};
Client.prototype.writeClient = function (message) {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
if ([ApplicationState.Processing].indexOf(this.state.ApplicationState) !== -1)
return [2 /*return*/, new Promise(function (resolve, reject) {
var response = Buffer.from(JSON.stringify(message));
var sendSize = Buffer.from(jspack_1.jspack.Pack("<I", [response.length]));
_this.client.write(sendSize, function (err) {
if (err) {
reject(err);
}
else {
_this.client.write(response, function (err) {
if (err)
reject(err);
else
resolve();
});
}
});
})];
return [2 /*return*/];
});
});
};
Client.prototype.disconnectClient = function () {
return __awaiter(this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
if (!this.isConnected())
return [2 /*return*/];
this.changeState(ApplicationState.Disconnecting);
this.client.off('data', this.dataReceiver);
return [2 /*return*/, new Promise(function (resolve, reject) { return _this.client.end(function () {
_this.changeState(ApplicationState.Disconnected);
resolve();
}); })];
});
});
};
Client.prototype.disconnectError = function (error, clientResponse) {
if (clientResponse === void 0) { clientResponse = false; }
return __awaiter(this, void 0, void 0, function () {
var userError;
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (!(typeof error === 'undefined')) return [3 /*break*/, 2];
return [4 /*yield*/, this.disconnectClient()];
case 1:
_a.sent();
return [2 /*return*/];
case 2:
userError = Array.isArray(error) ? error : [error];
userError.map(function (e) { return _this.configuration.hookError(_this.client, e); });
if (!(clientResponse && userError.length)) return [3 /*break*/, 4];
return [4 /*yield*/, this.writeClient({
errors: userError.map(function (e) { return ResponseError_1.ResponseError.from(e); }),
payload: null
})];
case 3:
_a.sent();
return [3 /*break*/, 6];
case 4: return [4 /*yield*/, this.disconnectClient()];
case 5:
_a.sent();
_a.label = 6;
case 6: return [2 /*return*/];
}
});
});
};
Client.prototype.expectChunk = function (data) {
var ExpectedBytes = this.state.ExpectedBytes;
this.state.Chunks.push(data);
var bufferSize = this.state.Chunks.reduce(function (initialData, chunk) { return initialData + chunk.length; }, 0);
if (bufferSize < ExpectedBytes) {
return null;
}
this.changeState(this.state.ApplicationNextState, 0);
var buffer = Buffer.concat(this.state.Chunks, bufferSize);
this.state.Chunks = [];
return [buffer.slice(0, ExpectedBytes), buffer.slice(ExpectedBytes)];
};
Object.defineProperty(Client.prototype, "services", {
get: function () {
var _this = this;
return __assign({ 'close': {
call: function () { return _this.disconnectClient(); },
request: {},
response: {}
}, 'index': {
call: function () { return ReceiveSchema_1.receiveSchema(_this.configuration.services); },
request: {},
response: {}
} }, this.configuration.services);
},
enumerable: true,
configurable: true
});
Client.prototype.unsafeClientSendingJSON = function (buffer) {
return __awaiter(this, void 0, void 0, function () {
var request, validation, serviceResponse, responseValidation;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
request = JSON.parse(buffer.toString('utf-8'));
if (!!request) return [3 /*break*/, 2];
return [4 /*yield*/, this.disconnectClient()];
case 1:
_a.sent();
return [2 /*return*/];
case 2:
validation = jsonschema_1.validate(request, ReceiveSchema_1.receiveSchema(this.services));
if (!validation.valid)
return [2 /*return*/, this.disconnectError(validation.errors, true)];
return [4 /*yield*/, Promise.resolve(this.services[request.service].call(request.payload))];
case 3:
serviceResponse = _a.sent();
if (this.state.ApplicationState !== ApplicationState.Processing)
return [2 /*return*/];
responseValidation = jsonschema_1.validate(serviceResponse, this.services[request.service].response);
if (!responseValidation.valid) {
return [2 /*return*/, this.disconnectError(responseValidation.errors, true)];
}
return [4 /*yield*/, this.writeClient({ payload: serviceResponse })];
case 4:
_a.sent();
return [2 /*return*/];
}
});
});
};
Client.prototype.isConnected = function () {
return [
ApplicationState.Disconnected,
ApplicationState.Disconnecting
].indexOf(this.state.ApplicationState) == -1;
};
Client.prototype.clientSendingJSON = function (buffer) {
return __awaiter(this, void 0, void 0, function () {
var e_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
_a.trys.push([0, 2, , 3]);
return [4 /*yield*/, this.unsafeClientSendingJSON(buffer)];
case 1:
_a.sent();
if (!this.isConnected())
return [2 /*return*/];
this.changeState(ApplicationState.Connected, 4, ApplicationState.ClientSendingJSONSize);
this.client.on('data', this.dataReceiver);
return [3 /*break*/, 3];
case 2:
e_1 = _a.sent();
try {
this.disconnectError(e_1, true);
}
catch (e) {
this.configuration.hookError(this.client, e);
}
return [3 /*break*/, 3];
case 3: return [2 /*return*/];
}
});
});
};
Client.prototype.receiveData = function (data) {
var chunks = this.expectChunk(data);
if (!chunks)
return;
var buffer = chunks[0], nextBuffer = chunks[1];
switch (this.state.ApplicationState) {
case ApplicationState.ClientSendingJSONSize:
var expectedBytes = jspack_1.jspack.Unpack('<I', buffer, 0).pop() || 0;
if (expectedBytes > this.configuration.maxPayloadSize)
this.disconnectError(new Error('Payload too long'), true);
this.changeState(ApplicationState.ClientSendingJSON, expectedBytes);
break;
case ApplicationState.ClientSendingJSON:
this.client.off('data', this.dataReceiver);
this.changeState(ApplicationState.Processing, 0);
this.clearTimeout();
this.clientSendingJSON(buffer);
this.setTimeout();
break;
}
if (nextBuffer.length !== 0)
this.receiveData(nextBuffer);
};
return Client;
}());
exports.Client = Client;
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