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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,209 @@ | ||
| import { Server, createServer } from "http"; | ||
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| const defaultResponse = `<!doctype html> | ||
| <html> | ||
| <head> | ||
| <title>pipe</title> | ||
| </head> | ||
| <body> | ||
| <pre id="output"></pre> | ||
| <script type="text/javascript"> | ||
| const Output = document.getElementById("output"); | ||
| var EvtSource = new EventSource('/stream'); | ||
| EvtSource.onmessage = function (event) { | ||
| Output.appendChild(document.createTextNode(event.data)); | ||
| Output.appendChild(document.createElement("br")); | ||
| }; | ||
| </script> | ||
| </body> | ||
| </html>`; | ||
|
|
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| function generate_uuidv4() { | ||
| let dt = new Date().getTime(); | ||
| return "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g, function (c) { | ||
| let rnd = Math.random() * 16; | ||
| rnd = (dt + rnd) % 16 | 0; | ||
| dt = Math.floor(dt / 16); | ||
| return (c === "x" ? rnd : (rnd & 0x3) | 0x8).toString(16); | ||
| }); | ||
| } | ||
|
|
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| class MessageBuffer<T> { | ||
| private _size: number; | ||
| private _items: [number, T][]; | ||
| private _writePos: number = 0; | ||
| private _head: number = 0; | ||
| private _timeout: number = 10; | ||
| private _readers: Map<string, (item: T) => void>; | ||
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|
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| public constructor(size = 100) { | ||
| this._size = size; | ||
| this._items = new Array(size); | ||
| this._readers = new Map<string, (item: T) => void>(); | ||
| } | ||
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| public put(item: T): void { | ||
| const curTime = new Date().getTime(); | ||
| this._items[this._writePos % this._size] = [curTime, item]; | ||
| this._writePos += 1; | ||
| if (this._head === this._writePos) { | ||
| this._head += 1; | ||
| } | ||
|
|
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| const minTime = curTime - this._timeout * 1000; | ||
| let atItem; | ||
| while (this._head < this._writePos) { | ||
| atItem = this._items[this._head % this._size]; | ||
| if (atItem === undefined) break; | ||
| if (atItem[0] > minTime) break; | ||
| this._head += 1; | ||
| } | ||
| } | ||
|
|
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| public subscribe(callback: (item: T) => void): string { | ||
| const readerId = generate_uuidv4(); | ||
| this._readers.set(readerId, callback); | ||
| setTimeout(() => this.stream(readerId)); | ||
| return readerId; | ||
| } | ||
|
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| public unsubscribe(readerId: string): void { | ||
| this._readers.delete(readerId); | ||
| } | ||
|
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| public stream(readerId: string, readPos?: number): void { | ||
| const cb = this._readers.get(readerId); | ||
| if (!cb) return; | ||
|
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| let atReadPos = typeof readPos === "undefined" ? this._head : readPos; | ||
| let item; | ||
| while (true) { | ||
| item = this._items[atReadPos % this._size]; | ||
| if (typeof item === "undefined") { | ||
| break; | ||
| } | ||
| cb(item[1]); | ||
| atReadPos += 1; | ||
| } | ||
| setTimeout(() => this.stream(readerId, atReadPos), 500); | ||
| } | ||
| } | ||
|
|
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| const ENVELOPE = "envelope"; | ||
| const EVENT = "event"; | ||
|
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| type Payload = [string, string]; | ||
|
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| let serverInstance: Server; | ||
|
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| function getCorsHeader(): { [name: string]: string } { | ||
| return { | ||
| "Access-Control-Allow-Origin": "*", | ||
| "Access-Control-Allow-Credentials": "true", | ||
| "Access-Control-Allow-Headers": "*", | ||
| }; | ||
| } | ||
|
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| function startServer(buffer: MessageBuffer<Payload>, port: number): Server { | ||
| const server = createServer((req, res) => { | ||
| console.log(`[spotlight] Received request ${req.method} ${req.url}`); | ||
| if (req.headers.accept && req.headers.accept == "text/event-stream") { | ||
| if (req.url == "/stream") { | ||
| res.writeHead(200, { | ||
| "Content-Type": "text/event-stream", | ||
| "Cache-Control": "no-cache", | ||
| ...getCorsHeader(), | ||
| Connection: "keep-alive", | ||
| }); | ||
| res.flushHeaders(); | ||
|
|
||
| const sub = buffer.subscribe(([payloadType, data]) => { | ||
| res.write(`event:${payloadType}\n`); | ||
| data.split("\n").forEach((line) => { | ||
| res.write(`data:${line}\n`); | ||
| }); | ||
| res.write("\n"); | ||
| }); | ||
|
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||
| req.on("close", () => { | ||
| buffer.unsubscribe(sub); | ||
| }); | ||
| } else { | ||
| res.writeHead(404); | ||
| res.end(); | ||
| } | ||
| } else { | ||
| if (req.url == "/stream") { | ||
| if (req.method === "OPTIONS") { | ||
| res.writeHead(204, { | ||
| "Cache-Control": "no-cache", | ||
| ...getCorsHeader(), | ||
| }); | ||
| res.end(); | ||
| } else if (req.method === "POST") { | ||
| let body: string = ""; | ||
| req.on("readable", () => { | ||
| const chunk = req.read(); | ||
| if (chunk !== null) body += chunk; | ||
| }); | ||
| req.on("end", () => { | ||
| const payloadType = | ||
| req.headers["content-type"] === "application/x-sentry-envelope" | ||
| ? ENVELOPE | ||
| : EVENT; | ||
| buffer.put([payloadType, body]); | ||
| res.writeHead(204, { | ||
| "Cache-Control": "no-cache", | ||
| ...getCorsHeader(), | ||
| Connection: "keep-alive", | ||
| }); | ||
| res.end(); | ||
| }); | ||
| } else { | ||
| res.writeHead(200, { | ||
| "Content-Type": "text/html", | ||
| }); | ||
| res.write(defaultResponse); | ||
| res.end(); | ||
| } | ||
| } else { | ||
| res.writeHead(404); | ||
| res.end(); | ||
| } | ||
| } | ||
| }); | ||
|
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| server.on("error", (e) => { | ||
| if ("code" in e && e.code === "EADDRINUSE") { | ||
| // console.error('[Spotlight] Address in use, retrying...'); | ||
| setTimeout(() => { | ||
| server.close(); | ||
| server.listen(port); | ||
| }, 5000); | ||
| } | ||
| }); | ||
| server.listen(port, () => { | ||
| console.log(`[Spotlight] Sidecar listening on ${port}`); | ||
| }); | ||
|
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| return server; | ||
| } | ||
|
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| export function setupSidecar(): void { | ||
| const buffer: MessageBuffer<Payload> = new MessageBuffer<Payload>(); | ||
|
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| if (!serverInstance) { | ||
| serverInstance = startServer(buffer, 8969); | ||
| } | ||
| } | ||
|
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| function shutdown() { | ||
| if (serverInstance) { | ||
| console.log("[Spotlight] Shutting down server"); | ||
| serverInstance.close(); | ||
| } | ||
| } | ||
|
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| process.on("SIGTERM", () => { | ||
| shutdown(); | ||
| }); |
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