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Merge pull request #907 from SISheogorath/fix/historyLZString

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Some minor improvements for LZString handling
This commit is contained in:
Christoph (Sheogorath) Kern 2018-07-28 15:03:06 +02:00 committed by GitHub
commit 93a3ce1164
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2 changed files with 19 additions and 2 deletions
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13
lib/history.js
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@ -31,6 +31,15 @@ function getHistory (userid, callback) {
history = JSON.parse(user.history)
// migrate LZString encoded note id to base64url encoded note id
for (let i = 0, l = history.length; i < l; i++) {
// Calculate minimal string length for an UUID that is encoded
// base64 encoded and optimize comparsion by using -1
// this should make a lot of LZ-String parsing errors obsolete
// as we can assume that a nodeId that is 48 chars or longer is a
// noteID.
const base64UuidLength = ((4 * 36) / 3) - 1
if (!(history[i].id.length > base64UuidLength)) {
continue
}
try {
let id = LZString.decompressFromBase64(history[i].id)
if (id && models.Note.checkNoteIdValid(id)) {
@ -38,9 +47,13 @@ function getHistory (userid, callback) {
}
} catch (err) {
// most error here comes from LZString, ignore
if (err.message === 'Cannot read property \'charAt\' of undefined') {
logger.warning('Looks like we can not decode "' + history[i].id + '" with LZString. Can be ignored.')
} else {
logger.error(err)
}
}
}
history = parseHistoryToObject(history)
}
if (config.debug) {

4
lib/models/note.js
View file

@ -227,7 +227,11 @@ module.exports = function (sequelize, DataTypes) {
var id = LZString.decompressFromBase64(noteId)
if (id && Note.checkNoteIdValid(id)) { return callback(null, id) } else { return _callback(null, null) }
} catch (err) {
if (err.message === 'Cannot read property \'charAt\' of undefined') {
logger.warning('Looks like we can not decode "' + noteId + '" with LZString. Can be ignored.')
} else {
logger.error(err)
}
return _callback(null, null)
}
},