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Comment how we should consume logs
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@ -23,7 +23,9 @@ limitations under the License.
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// local storage, which does work in incognito mode. We also need to handle the case where there are 2+ tabs. Each JS runtime
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// generates a random string which serves as the "ID" for that tab/session. These IDs are stored along with the log lines.
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// - Bug reports are sent as a POST over HTTPS: it purposefully does not use Matrix as bug reports may be made when Matrix is
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// not responsive (which may be the cause of the bug).
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// not responsive (which may be the cause of the bug). We send the most recent N MB of UTF-8 log data, starting with the most
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// recent, which we know because the "ID"s are actually timestamps. We then purge the remaining logs. We also do this check
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// on startup to prevent logs from accumulating.
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const FLUSH_RATE_MS = 30 * 1000;
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@ -143,6 +145,39 @@ class IndexedDBLogStore {
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});
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}
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/**
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* Consume the most recent logs and return them. Older logs which are not returned are deleted at the same time,
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* so this can be called at startup to do house-keeping to keep the logs from growing too large.
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*
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* @param {boolean} clearAll True to clear the most recent logs returned in addition to the
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* older logs. This is desirable when sending bug reports as we do not want to submit the
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* same logs twice. This is not desirable when doing house-keeping at startup in case they
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* want to submit a bug report later.
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* @return {Promise<Object[]>} Resolves to an array of objects. The array is sorted in time (oldest first) based on
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* when the log file was created (the log ID). The objects have said log ID in an "id" field and "lines" which is a
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* big string with all the new-line delimited logs.
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*/
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consume(clearAll) {
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const MAX_LOG_SIZE = 1024 * 1024 * 50; // 50 MB
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// To gather all the logs, we first query for every log entry with index "0", this will let us
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// know all the IDs from different tabs/sessions.
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return new Promise((resolve, reject) => {
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// let txn = this.db.transaction("logs", "readonly");
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// let objectStore = txn.objectStore("logs");
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// we know each entry has a unique ID, and we know IDs are timestamps, so accumulate all the IDs,
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// ignoring the logs for now, and sort them to work out the correct log ID ordering.
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// Starting with the most recent ID, fetch the logs (all indices) for said ID and accumulate them
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// in order. After fetching ALL the logs for an ID, recheck the total length of the logs to work out
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// if we have exceeded the max size cutoff for "recent" logs.
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// Remove all logs that are older than the cutoff (or the entire logs if clearAll is set).
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// Return the logs that are within the cutoff.
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});
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}
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_generateLogEntry(lines) {
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return {
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id: this.id,
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@ -187,9 +222,8 @@ module.exports = {
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* @return {Promise} Resolved when the bug report is sent.
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*/
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sendBugReport: function(userText) {
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// To gather all the logs, we first query for every log entry with index "0", this will let us
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// know all the IDs from different tabs/sessions.
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// Send logs grouped by ID
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return store.consume(true).then((data) => {
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// Send logs grouped by ID
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});
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}
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};
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