diff --git a/.gitignore b/.gitignore index ea520dc..55031d6 100644 --- a/.gitignore +++ b/.gitignore @@ -12,3 +12,4 @@ nitter nitter.conf guest_accounts.json* dump.rdb +proxy/node_modules diff --git a/docker-compose.yml b/docker-compose.yml index 207914e..2c4625e 100644 --- a/docker-compose.yml +++ b/docker-compose.yml @@ -4,6 +4,22 @@ networks: nitter: services: + # proxy: + # hostname: nitter-proxy + # container_name: nitter-proxy + # build: + # context: ./proxy + # dockerfile: Dockerfile + # environment: + # HOST: "0.0.0.0" + # PORT: "8080" + # NITTER_BASE_URL: "http://nitter:8080" + # CONCURRENCY: "1" + # ports: + # - "8002:8080" + # networks: + # - nitter + nitter: build: . container_name: nitter diff --git a/proxy/.npmrc b/proxy/.npmrc new file mode 100644 index 0000000..3bd3b7d --- /dev/null +++ b/proxy/.npmrc @@ -0,0 +1 @@ +shell-emulator=true diff --git a/proxy/Dockerfile b/proxy/Dockerfile new file mode 100644 index 0000000..000ead8 --- /dev/null +++ b/proxy/Dockerfile @@ -0,0 +1,21 @@ +# this is our first build stage, it will not persist in the final image +FROM node:20.11.0-buster-slim as intermediate + +# installation required packages +RUN apt-get update && apt-get install -y --no-install-recommends ssh git python python3 build-essential +RUN npm install -g pnpm@9.1.1 +RUN mkdir -p /opt +WORKDIR /opt + +COPY tsconfig.json /opt +COPY package.json pnpm-lock.yaml ./ +RUN pnpm install --frozen-lockfile + +COPY ./src /opt/src + +RUN pnpm run build + +# copy just the package form the previous image +FROM node:20.11.0-buster-slim +COPY --from=intermediate /opt /opt +ENTRYPOINT ["node", "/opt/build/index.js"] diff --git a/proxy/package.json b/proxy/package.json new file mode 100644 index 0000000..0092699 --- /dev/null +++ b/proxy/package.json @@ -0,0 +1,27 @@ +{ + "name": "nitter-proxy", + "version": "1.6.7", + "scripts": { + "clean": "rm -rf build", + "prebuild": "npm run clean", + "build": "tsc --build" + }, + "author": "", + "license": "ISC", + 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FastifyRequest, +} from "fastify" +import { PinoLoggerOptions } from "fastify/types/logger" +import { Proxy } from "./proxy" +import { Logger } from "pino" +import 'dotenv/config' + +const host = process.env.HOST +const port = parseInt(process.env.PORT ?? "8080", 10) +const baseUrl = process.env.NITTER_BASE_URL +const concurrency = parseInt(process.env.CONCURRENCY ?? "1", 10) +const retryAfterMillis = process.env.RETRY_AFTER_MILLIS ? parseInt(process.env.RETRY_AFTER_MILLIS, 10) : null +const maxCacheSize = parseInt(process.env.MAX_CACHE_SIZE ?? "100000", 10) +const logLevel = process.env.LOG_LEVEL ?? "debug" + +const server = fastify({ + logger: { + name: "app", + level: logLevel, + ...( logLevel == "trace" ? { transport: { target: 'pino-pretty' } } : {}) + } as PinoLoggerOptions +}) + +const log = server.log as Logger +const proxy = new Proxy(log, baseUrl, concurrency, retryAfterMillis, maxCacheSize) + +async function main() { + + server.register((fastify: FastifyInstance, opts, done) => { + + fastify.get(`/user/:username`, {}, + async (request: FastifyRequest, reply: FastifyReply) => { + log.debug({ + headers: request.headers, + reqId: request.id, + params: request.params }, 'incoming request /user/:username') + const { username } = request.params as any + const { status, data } = await proxy.getUser(username, { reqId: request.id }) + reply.status(status).send(data) + }); + + fastify.get(`/user/:userId/tweets`, {}, + async (request: FastifyRequest, reply: FastifyReply) => { + const { userId } = request.params as any + const { cursor } = request.query as any + const { status, data } = await proxy.getUserTweets(userId, cursor, { reqId: request.id }) + reply.status(status).send(data) + }); + + fastify.get(`/tweet/:id`, {}, + async (request: FastifyRequest, reply: FastifyReply) => { + const { id } = request.params as any + const { status, data } = await proxy.getTweetById(id, { reqId: request.id }) + reply.status(status).send(data) + }); + + done() + + }, { prefix: '/api' }) + + server.setNotFoundHandler((request: FastifyRequest, reply: FastifyReply) => { + reply.status(404) + .send({ message: `Method not found` }) + }) + + server.setErrorHandler((err: Error, request: FastifyRequest, reply: FastifyReply) => { + const { log } = request + log.error(err) + // Send error response + reply.status(500).send({ message: `Internal server error` }) + }) + + // await server.register(import('@fastify/rate-limit'), { + // max: 100, + // timeWindow: '1 minute' + // }) + + await server.listen({ port, host } as FastifyListenOptions); +} + +main().catch(err => { + log.fatal(err) + process.exit(1) +}) diff --git a/proxy/src/proxy.ts b/proxy/src/proxy.ts new file mode 100644 index 0000000..872f481 --- /dev/null +++ b/proxy/src/proxy.ts @@ -0,0 +1,209 @@ +// noinspection TypeScriptUnresolvedReference + +import axios from "axios" +import { AxiosInstance, AxiosRequestConfig } from "axios" +import fastq from "fastq" +import { Logger } from "pino" +import retry from "axios-retry-after" +import { LRUCache } from 'lru-cache' + +const GET_USER_POSITIVE_TTL_MS = process.env.GET_USER_POSITIVE_TTL + ? parseInt(process.env.GET_USER_POSITIVE_TTL, 10) * 1000 + : 30 * 24 * 3600 * 1000 +const GET_USER_NEGATIVE_TTL_MS = process.env.GET_USER_NEGATIVE_TTL + ? parseInt(process.env.GET_USER_NEGATIVE_TTL, 10) * 1000 + : 3600 * 1000 +const GET_TWEETS_POSITIVE_TTL_MS = process.env.GET_TWEETS_POSITIVE_TTL + ? parseInt(process.env.GET_TWEETS_POSITIVE_TTL, 10) * 1000 + : 60 * 1000 +const GET_TWEETS_NEGATIVE_TTL_MS = process.env.GET_TWEETS_NEGATIVE_TTL + ? parseInt(process.env.GET_TWEETS_NEGATIVE_TTL, 10) * 1000 + : 60 * 1000 +const GET_TWEET_POSITIVE_TTL_MS = process.env.GET_TWEET_POSITIVE_TTL + ? parseInt(process.env.GET_TWEET_POSITIVE_TTL, 10) * 1000 + : 60 * 1000 +const GET_TWEET_NEGATIVE_TTL_MS = process.env.GET_TWEET_NEGATIVE_TTL + ? parseInt(process.env.GET_TWEET_NEGATIVE_TTL, 10) * 1000 + : 60 * 1000 + +export interface Job { + reqId: string + url: string + params?: Record +} + +export interface JobResponse { + status: number, + data: any +} + +export class Proxy { + + private readonly cache: LRUCache + private readonly client: AxiosInstance + private readonly queue: fastq.queueAsPromised + private counter: { requests: number } + private timeWindowMillis = 15 * 60 * 1000 + private maxRequestsPerAccount = 15 * 60 + + constructor( + private log: Logger, + private baseUrl: string, + private concurrency: number, + retryAfterMillis: number, + maxCacheSize: number + ) { + this.cache = new LRUCache({ max: maxCacheSize }) + this.queue = fastq.promise(this, this.sendRequest, concurrency) + this.client = axios.create() + this.counter = { + requests: 0 + } + + setInterval(() => { + this.counter.requests = 0 + }, this.timeWindowMillis) + + if ( retryAfterMillis ) { + this.client.interceptors.response.use(null, retry(this.client, { + // Determine when we should attempt to retry + isRetryable (error) { + log.debug({ status: error.response?.status, headers: error.response?.headers }, 'checking retryable') + return ( + error.response && error.response.status === 429 + // Use X-Retry-After rather than Retry-After, and cap retry delay at 60 seconds + // && error.response.headers['x-retry-after'] && error.response.headers['x-retry-after'] <= 60 + ) + }, + // Customize the wait behavior + wait (error) { + log.debug({ status: error.response?.status, headers: error.response?.headers }, 'waiting for retry') + return new Promise( + // Use X-Retry-After rather than Retry-After + // resolve => setTimeout(resolve, error.response.headers['x-retry-after']) + resolve => setTimeout(resolve, retryAfterMillis) + ) + } + })) + } + } + + async getUser(username: string, options?: { reqId?: string }) { + const key = `usernames:${username}` + + if ( this.cache.has(key)) { + return this.cache.get(key) + } + + const result = await this.queue.push({ + url: `/api/user/${ username }`, + reqId: options?.reqId + }) + + if ( result.status === 200 ) { + this.cache.set(key, result, { ttl: GET_USER_POSITIVE_TTL_MS }) + } + if ( result.status === 404 ) { + this.cache.set(key, result, { ttl: GET_USER_NEGATIVE_TTL_MS }) + } + + return result + } + + async getUserTweets(userId: string, cursor?: string, options?: { reqId?: string }) { + const key = `users:${userId}:tweets:${cursor ?? 'last'}` + + if ( this.cache.has(key) ) { + return this.cache.get(key) + } + + const result = await this.queue.push({ + url: `/api/user/${ userId }/tweets`, + params: { cursor }, + reqId: options?.reqId + }) + + if ( result.status === 200 ) { + this.cache.set(key, result, { ttl: GET_TWEETS_POSITIVE_TTL_MS }) + } + if ( result.status === 404 ) { + this.cache.set(key, result, { ttl: GET_TWEETS_NEGATIVE_TTL_MS }) + } + + return result + } + + async getTweetById(tweetId: string, options?: { reqId?: string }) { + const key = `tweets:${tweetId}` + + if ( this.cache.has(key) ) { + return this.cache.get(key) + } + + const result = await this.queue.push({ + url: `/api/tweet/${ tweetId }`, + reqId: options?.reqId + }) + + if ( result.status === 200 ) { + this.cache.set(key, result, { ttl: GET_TWEET_POSITIVE_TTL_MS }) + } + if ( result.status === 404 ) { + this.cache.set(key, result, { ttl: GET_TWEET_NEGATIVE_TTL_MS }) + } + + return result + } + + private async sendRequest(job: Job): Promise { + + const { reqId, url, params } = job + + if ( this.counter.requests > this.concurrency * this.maxRequestsPerAccount ) { + return { + status: 429 + } + } + + let config = { + url, + method: "get", + baseURL: this.baseUrl, + params, + } as AxiosRequestConfig + + this.log.trace({ config, reqId: reqId }, 'sending request to nitter') + + try { + const response = await this.client.request(config) + + this.log.trace({ + status: response.status, + data: response.data, + reqId: reqId + }, 'nitter response') + + return { + status: response.status, + data: response.data, + } as JobResponse + + } catch(err) { + + this.log.warn({ err, reqId }, 'nitter error') + + if ( err.name === "AxiosError" ) { + + this.counter.requests = Number.MAX_SAFE_INTEGER + + return { + status: 429 + } as JobResponse + } + + return { + status: 500 + } + } + } +} diff --git a/proxy/src/types.d.ts b/proxy/src/types.d.ts new file mode 100644 index 0000000..a0c18fa --- /dev/null +++ b/proxy/src/types.d.ts @@ -0,0 +1,39 @@ +declare module 'axios-retry-after' { + + import { AxiosError, AxiosInstance } from "axios"; + + /** + * Function to enhance Axios instance with retry-after functionality. + * @param axios Axios instance to be enhanced. + * @param options Configuration options for retry behavior. + */ + export default function( + axios: AxiosInstance, + options?: AxiosRetryAfterOptions + ): (error: AxiosError) => Promise; + + /** + * Configuration options for axios-retry-after. + */ + export interface AxiosRetryAfterOptions { + /** + * Function to determine if an error response is retryable. + * @param error The Axios error to evaluate. + */ + isRetryable?: (error: AxiosError) => boolean; + + /** + * Function to wait for a specified amount of time. + * @param error The Axios error that contains retry-after header. + */ + wait?: (error: AxiosError) => Promise; + + /** + * Function to retry the original request. + * @param axios The Axios instance used for retrying the request. + * @param error The Axios error to retry. + */ + retry?: (axios: AxiosInstance, error: AxiosError) => Promise; + } +} + diff --git a/proxy/tsconfig.json b/proxy/tsconfig.json new file mode 100644 index 0000000..12c5931 --- /dev/null +++ b/proxy/tsconfig.json @@ -0,0 +1,18 @@ +{ + "compilerOptions": { + "lib": ["esnext"], + "allowSyntheticDefaultImports": true, + "esModuleInterop": true, + "experimentalDecorators": true, + "emitDecoratorMetadata": true, + "module": "commonjs", + "target": "esnext", + "allowJs": true, + "sourceMap": true, + "outDir": "./build" + }, + "include": ["src/**/*"], + "exclude": [ + "node_modules" + ] +}