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* feat(cloud-function): ad bsa support this refactors the pong lib: - bundle click.js, get.js, viewed.js in pong.js - add pong2.js based on bsa's api - remove fallback * add stage config * remove log * decode copy to be safe * feedback
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| import * as url from "node:url"; | ||
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| import type { Request, Response } from "express"; | ||
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| import { Coder } from "../internal/pong/index.js"; | ||
| import { | ||
| createPong2GetHandler, | ||
| createPong2ClickHandler, | ||
| createPong2ViewedHandler, | ||
| fetchImage, | ||
| } from "../internal/pong/index.js"; | ||
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| import * as env from "../env.js"; | ||
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| import { getRequestCountry } from "../utils.js"; | ||
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| const { SIGN_SECRET, BSA_ZONE_KEYS } = env; | ||
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| const coder = new Coder(SIGN_SECRET); | ||
| const handleGet = createPong2GetHandler(BSA_ZONE_KEYS, coder, env); | ||
| const handleClick = createPong2ClickHandler(coder); | ||
| const handleViewed = createPong2ViewedHandler(coder); | ||
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| export async function proxyBSA(req: Request, res: Response) { | ||
| const countryCode = getRequestCountry(req); | ||
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| const userAgent = req.headers["user-agent"] ?? ""; | ||
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| const parsedUrl = url.parse(req.url); | ||
| const pathname = parsedUrl.pathname ?? ""; | ||
| const search = parsedUrl.search ?? ""; | ||
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| if (pathname === "/pong/get") { | ||
| if (req.method !== "POST") { | ||
| return res.sendStatus(405).end(); | ||
| } | ||
|
|
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| const { body } = req; | ||
| const { statusCode: status, payload } = await handleGet( | ||
| body, | ||
| countryCode, | ||
| userAgent | ||
| ); | ||
|
|
||
| return res | ||
| .status(status) | ||
| .setHeader("cache-control", "no-store") | ||
| .setHeader("content-type", "application/json") | ||
| .end(JSON.stringify(payload)); | ||
| } else if (req.path === "/pong/click") { | ||
| if (req.method !== "GET") { | ||
| return res.sendStatus(405).end(); | ||
| } | ||
| const params = new URLSearchParams(search); | ||
| try { | ||
| const { status, location } = await handleClick(params); | ||
| if (location && (status === 301 || status === 302)) { | ||
| return res.redirect(location); | ||
| } else { | ||
| return res.sendStatus(502).end(); | ||
| } | ||
| } catch (e) { | ||
| console.error(e); | ||
| } | ||
| } else if (pathname === "/pong/viewed") { | ||
| if (req.method !== "POST") { | ||
| return res.sendStatus(405).end(); | ||
| } | ||
| const params = new URLSearchParams(search); | ||
| try { | ||
| await handleViewed(params); | ||
| return res.sendStatus(201).end(); | ||
| } catch (e) { | ||
| console.error(e); | ||
| } | ||
| } else if (pathname.startsWith("/pimg/")) { | ||
| const src = coder.decodeAndVerify( | ||
| decodeURIComponent(pathname.substring("/pimg/".length)) | ||
| ); | ||
| if (!src) { | ||
| return res.sendStatus(400).end(); | ||
| } | ||
| const { buf, contentType } = await fetchImage(src); | ||
| return res | ||
| .status(200) | ||
| .set({ | ||
| "cache-control": "max-age=86400", | ||
| "content-type": contentType, | ||
| }) | ||
| .end(Buffer.from(buf)); | ||
| } | ||
|
|
||
| return res.status(204).end(); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| import { BSA_ENABLED, BSA_URL_PREFIX } from "../env.js"; | ||
| import { proxyBSA } from "./proxy-bsa.js"; | ||
| import { proxyKevel } from "./proxy-kevel.js"; | ||
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| import type { Request, Response } from "express"; | ||
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| export async function proxyPong(req: Request, res: Response) { | ||
| if (BSA_ENABLED) { | ||
| const referrer = req.get("referrer") || ""; | ||
| const version = Number(req.query["version"]) || 1; | ||
| if (referrer.startsWith(BSA_URL_PREFIX) || version === 2) { | ||
| return proxyBSA(req, res); | ||
| } | ||
| } | ||
| return proxyKevel(req, res); | ||
| } |
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