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Add experiments and elongator by default experiment

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dangered wolf 2023-08-21 03:02:02 -04:00
parent f939712635
commit 09acfaea2b
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2 changed files with 42 additions and 5 deletions
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24
src/experiments.ts Normal file
View file

@ -0,0 +1,24 @@
export enum Experiment {
ELONGATOR_BY_DEFAULT = 'ELONGATOR_BY_DEFAULT'
}
type ExperimentConfig = {
name: string,
description: string,
percentage: number;
}
const Experiments: { [key in Experiment]: ExperimentConfig } = {
[Experiment.ELONGATOR_BY_DEFAULT]: {
name: 'Elongator by default',
description: 'Enable Elongator by default (guest token lockout bypass)',
percentage: 0.5
}
}
export const experimentCheck = (experiment: Experiment, condition = true) => {
console.log(`Checking experiment ${experiment}`)
const experimentEnabled = Experiments[experiment].percentage > Math.random() && condition;
console.log(`Experiment ${experiment} enabled: ${experimentEnabled}`)
return experimentEnabled;
}

23
src/fetch.ts
View file

@ -1,8 +1,10 @@
import { Constants } from './constants';
import { Experiment, experimentCheck } from './experiments';
import { generateUserAgent } from './helpers/useragent';
import { isGraphQLTweet } from './utils/graphql';
const API_ATTEMPTS = 3;
let wasElongatorDisabled = false;
function generateCSRFToken() {
const randomBytes = new Uint8Array(160 / 2);
@ -13,7 +15,7 @@ function generateCSRFToken() {
export const twitterFetch = async (
url: string,
event: FetchEvent,
useElongator = false,
useElongator = typeof TwitterProxy !== 'undefined' && experimentCheck(Experiment.ELONGATOR_BY_DEFAULT),
validateFunction: (response: unknown) => boolean
): Promise<unknown> => {
let apiAttempts = 0;
@ -129,6 +131,7 @@ export const twitterFetch = async (
headers: headers
});
console.log('Elongator request successful');
throw 'asdhasdhbsa';
} else {
apiRequest = await fetch(url, {
method: 'GET',
@ -142,16 +145,21 @@ export const twitterFetch = async (
/* We'll usually only hit this if we get an invalid response from Twitter.
It's uncommon, but it happens */
console.error('Unknown error while fetching from API', e);
event &&
!useElongator && event &&
event.waitUntil(
cache.delete(guestTokenRequestCacheDummy.clone(), { ignoreMethod: true })
);
if (useElongator) {
console.log('Elongator request failed, trying again without it');
wasElongatorDisabled = true;
}
newTokenGenerated = true;
useElongator = false;
continue;
}
// @ts-expect-error This is safe due to optional chaining
if ((response as TweetResultsByRestIdResult)?.data?.tweetResult?.result?.reason === 'NsfwLoggedOut') {
if (!wasElongatorDisabled && !useElongator && typeof TwitterProxy !== 'undefined' && (response as TweetResultsByRestIdResult)?.data?.tweetResult?.result?.reason === 'NsfwLoggedOut') {
console.log(`nsfw tweet detected, it's elongator time`);
useElongator = true;
continue;
@ -162,7 +170,7 @@ export const twitterFetch = async (
);
console.log(`Remaining rate limit: ${remainingRateLimit} requests`);
/* Running out of requests within our rate limit, let's purge the cache */
if (remainingRateLimit < 10 && !useElongator) {
if (!useElongator && remainingRateLimit < 10) {
console.log(`Purging token on this edge due to low rate limit remaining`);
event &&
event.waitUntil(
@ -172,6 +180,11 @@ export const twitterFetch = async (
if (!validateFunction(response)) {
console.log('Failed to fetch response, got', response);
if (useElongator) {
console.log('Elongator request failed to validate, trying again without it');
wasElongatorDisabled = true;
}
useElongator = false;
newTokenGenerated = true;
continue;
}
@ -201,7 +214,7 @@ export const twitterFetch = async (
export const fetchConversation = async (
status: string,
event: FetchEvent,
useElongator = false
useElongator = typeof TwitterProxy !== 'undefined' && experimentCheck(Experiment.ELONGATOR_BY_DEFAULT)
): Promise<TweetResultsByRestIdResult> => {
return (await twitterFetch(
`${