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index.ts
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index.ts
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import { APIGateway } from "../../";
import { getMoleculerServiceBroker } from "../../test";
import fs from "fs";
import path from "path";
import MemoryStream from "memorystream";
import ReadableStream = NodeJS.ReadableStream;
const gateway = new APIGateway({
brokers: [
{
moleculer: {
nodeID: "gateway-node",
namespace: "dev-gateway",
transporter: {
type: "TCP",
udpPeriod: 1,
},
},
},
],
schema: {
branch: {
maxVersions: 1,
},
},
server: {
update: {
debouncedSeconds: 0,
},
protocol: {
http: {
port: 8080,
},
// https: {
// key: fs.readFileSync(path.join(__dirname, "../../https/key.pem")),
// cert: fs.readFileSync(path.join(__dirname, "../../https/server.crt")),
// },
},
middleware: {
cors: false,
serveStatic: {
dirRootPath: __dirname + "/__test__",
routeBasePath: "/",
},
// logging: {
// level: "debug",
// },
},
},
logger: {
winston: {level: "info"},
},
});
const services = getMoleculerServiceBroker({
moleculer: {
nodeID: "remote-node",
namespace: "dev-gateway",
transporter: {
type: "TCP",
udpPeriod: 1,
},
},
services: [
{
name: "chat",
metadata: {
api: {
branch: "master",
policy: {},
protocol: {
WebSocket: {
basePath: "/chat",
description: "...",
routes: [
/* bidirectional streaming chat */
{
path: "/message-stream/:roomId",
call: {
action: "chat.message.stream",
params: {
roomId: "@path.roomId",
},
},
},
/* pub/sub chat */
{
path: "/message-pubsub/:roomId",
subscribe: {
events: `({ path }) => ["chat.message." + path.roomId]`,
},
publish: {
event: `({ path }) => "chat.message." + path.roomId`,
params: "@message",
},
},
/* pub/sub video */
{
path: "/video-pubsub",
subscribe: {
events: ["chat.video"],
},
publish: {
event: "chat.video",
params: {
id: "@context.id",
username: "@query.username",
data: "@message",
},
filter: `({ params }) => params.id && params.username && params.data`,
},
},
/* streaming video */
{
path: "/video-stream/:type",
call: {
action: "chat.video.stream",
params: {
id: "@context.id",
type: "@path.type",
},
},
},
],
},
},
},
},
actions: {
"message.stream": {
handler(ctx) {
// bidirectional
const serverStream = new MemoryStream("---initial-content-from-server---");
const clientStream = ctx.params! as ReadableStream;
clientStream.on("data", data => {
serverStream.write("---remote service received data and echo: " + data.toString() + "---");
});
return serverStream;
},
},
"video.stream": {
handler(ctx) {
// mono-directional
const {id, type} = (ctx.meta || {}) as any;
if (!id || !type) {
throw new Error("invalid params");
}
if (type === "server") {
// store server stream
if (this.serverStream) {
throw new Error("server is already going on");
}
const stream = ctx.params! as ReadableStream;
if (!stream || !stream.pipe) {
throw new Error("invalid stream for server");
}
this.serverStream = stream;
if (!this.clientStreams) {
this.clientStreams = [];
}
stream.on("close", () => {
delete this.serverStream;
delete this.metaChunks;
});
this.metaChunks = null;
stream.on("data", data => {
this.lastPacketTime = new Date().getTime();
if (!this.metaChunks) {
this.metaChunks = [];
}
if (this.metaChunks.length < 2) {
this.metaChunks.push(data);
console.log(`collecting meta chunks... (${this.metaChunks.length}/2)`);
}
this.clientStreams.forEach((clientStream: any) => clientStream.write(data));
});
this.interval = setInterval(() => {
if (this.lastPacketTime && new Date().getTime() - this.lastPacketTime > 1000 * 5) {
// @ts-ignore
stream.destroy();
clearInterval(this.interval);
delete this.interval;
console.log("server stream closed due to interval timeout 5s", id);
}
}, 1000);
console.log("server stream created", id);
} else {
if (!this.serverStream) {
throw new Error("there are no server going on");
}
// new stream for client
const stream = new MemoryStream();
console.log("client stream created", id);
if (this.metaChunks) {
console.log(`send meta chunks (${this.metaChunks.length}) to ${id}`);
for (const chunk of this.metaChunks) {
stream.write(chunk);
}
}
stream.on("close", () => {
const index = (this.clientStreams as MemoryStream[]).indexOf(stream);
if (index !== -1) {
this.clientStreams.splice(index, 1);
console.log("client stream closed", id);
}
});
this.clientStreams.push(stream);
return stream;
}
},
},
},
},
{
name: "file",
metadata: {
api: {
branch: "master",
protocol: {
REST: {
description: "..",
basePath: "/file",
routes: [
{
method: "POST",
path: "/",
call: {
action: "file.upload",
params: "@body.file",
},
},
{
method: "GET",
path: "/:filename",
call: {
action: "file.get",
params: {
filename: "@path.filename",
},
},
},
],
},
},
policy: {},
},
},
actions: {
upload(ctx) {
return new Promise((resolve, reject) => {
if (!ctx.params || !(ctx.params! as any).pipe) {
throw new Error("no file to upload");
}
const meta = ctx.meta as any;
const saveStream = fs.createWriteStream(path.join(__dirname, "..", "tmp." + (meta.filename || "unknown-file")));
(ctx.params! as any).pipe(saveStream);
(ctx.params! as any).on("end", () => resolve(meta));
(ctx.params! as any).on("error", reject);
});
},
get: {
params: {
filename: "string",
},
handler(ctx) {
const filepath = path.join(__dirname, "..", "tmp." + (ctx.params! as any).filename);
if (!fs.statSync(filepath).isFile()) {
throw new Error("no such file");
}
// ctx.meta.$headers = {
// Location: "https://google.com",
// };
// ctx.meta.$status = 302;
return fs.createReadStream(filepath);
},
},
},
},
{
name: "foo",
metadata: {
api: {
branch: "master",
protocol: {
REST: {
description: "test..",
basePath: "/foo",
routes: [
{
method: "GET",
path: "/bar",
map: `() => { throw new Error("what an error"); }`,
},
{
method: "GET",
path: "/:id",
call: {
action: "foo.get",
params: {},
},
},
{
method: "GET",
path: "/:a/:b/:c?",
map: `(args) => args`,
},
],
},
GraphQL: {
description: "blablabla",
typeDefs: `
interface Node {
id: String
}
type Foo implements Node {
id: String
}
extend type Query {
foo(id: ID!): Foo
}
extend type Mutation {
uploadFile(file: Upload!): File!
}
type File {
mimetype: String
encoding: String
filename: String
}
`,
resolvers: {
Foo: {
id: `({ source }) => source.id`,
__isTypeOf: `({ source }) => source && source.__isFoo`,
},
Query: {
foo: {
call: {
action: "foo.get",
params: {
id: "@args.id[]",
},
map: `({ response }) => ({ ...response, __isFoo: true })`,
},
ignoreError: true,
},
},
Mutation: {
uploadFile: {
call: {
action: "foo.noop",
params: {
file: "@args.file",
},
map: `({ params }) => params.file`,
},
},
},
},
},
},
policy: {},
},
},
actions: {
get: {
params: {
id: ["string", {
type: "array",
items: "string",
}],
},
handler(ctx) {
const id = (ctx.params! as any).id;
if (Array.isArray(id)) { // batching
// tslint:disable-next-line:no-shadowed-variable
return id.map(id => ({id}));
}
return {id}; // single
},
},
noop(ctx) {
console.log("foo.noop got:", ctx.params);
},
},
},
],
});
(async () => {
await gateway.start();
await services.start();
})();