pad.pub0.org/bin/checkPad.js

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/*
* This is a debug tool. It checks all revisions for data corruption
*/
if (process.argv.length != 3) {
console.error('Use: node bin/checkPad.js $PADID');
process.exit(1);
}
// get the padID
const padId = process.argv[2];
// load and initialize NPM;
const npm = require('../src/node_modules/npm');
npm.load({}, async () => {
try {
// initialize database
const settings = require('../src/node/utils/Settings');
const db = require('../src/node/db/DB');
await db.init();
// load modules
const Changeset = require('ep_etherpad-lite/static/js/Changeset');
const padManager = require('../src/node/db/PadManager');
const exists = await padManager.doesPadExists(padId);
if (!exists) {
console.error('Pad does not exist');
process.exit(1);
}
// get the pad
const pad = await padManager.getPad(padId);
// create an array with key revisions
// key revisions always save the full pad atext
const head = pad.getHeadRevisionNumber();
const keyRevisions = [];
for (let rev = 0; rev < head; rev += 100) {
keyRevisions.push(rev);
}
// run through all key revisions
for (const keyRev of keyRevisions) {
// create an array of revisions we need till the next keyRevision or the End
const revisionsNeeded = [];
for (let rev = keyRev; rev <= keyRev + 100 && rev <= head; rev++) {
revisionsNeeded.push(rev);
}
// this array will hold all revision changesets
const revisions = [];
// run through all needed revisions and get them from the database
for (const revNum of revisionsNeeded) {
const revision = await db.get(`pad:${padId}:revs:${revNum}`);
revisions[revNum] = revision;
}
// check if the pad has a pool
if (pad.pool === undefined) {
console.error('Attribute pool is missing');
process.exit(1);
}
// check if there is an atext in the keyRevisions
if (revisions[keyRev] === undefined || revisions[keyRev].meta === undefined || revisions[keyRev].meta.atext === undefined) {
console.error(`No atext in key revision ${keyRev}`);
continue;
}
const apool = pad.pool;
let atext = revisions[keyRev].meta.atext;
for (let rev = keyRev + 1; rev <= keyRev + 100 && rev <= head; rev++) {
try {
// console.log("check revision " + rev);
const cs = revisions[rev].changeset;
atext = Changeset.applyToAText(cs, atext, apool);
} catch (e) {
console.error(`Bad changeset at revision ${rev} - ${e.message}`);
continue;
}
}
console.log('finished');
process.exit(0);
}
} catch (e) {
console.trace(e);
process.exit(1);
}
});