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Line length 80 like we're still in the 80s

This commit is contained in:
Kegan Dougal 2017-01-20 12:02:48 +00:00
parent ea860807c4
commit ba1e166ac8
1 changed files with 87 additions and 46 deletions
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133
src/vector/rageshake.js
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@ -17,18 +17,26 @@ limitations under the License.
import PlatformPeg from 'matrix-react-sdk/lib/PlatformPeg';
import request from "browser-request";
// This module contains all the code needed to log the console, persist it to disk and submit bug reports. Rationale is as follows:
// - Monkey-patching the console is preferable to having a log library because we can catch logs by other libraries more easily,
// without having to all depend on the same log framework / pass the logger around.
// - We use IndexedDB to persists logs because it has generous disk space limits compared to local storage. IndexedDB does not work
// in incognito mode, in which case this module will not be able to write logs to disk. However, the logs will still be stored
// in-memory, so can still be submitted in a bug report should the user wish to: we can also store more logs in-memory than in
// local storage, which does work in incognito mode. We also need to handle the case where there are 2+ tabs. Each JS runtime
// generates a random string which serves as the "ID" for that tab/session. These IDs are stored along with the log lines.
// - Bug reports are sent as a POST over HTTPS: it purposefully does not use Matrix as bug reports may be made when Matrix is
// 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
// recent, which we know because the "ID"s are actually timestamps. We then purge the remaining logs. We also do this purge
// on startup to prevent logs from accumulating.
// This module contains all the code needed to log the console, persist it to
// disk and submit bug reports. Rationale is as follows:
// - Monkey-patching the console is preferable to having a log library because
// we can catch logs by other libraries more easily, without having to all
// depend on the same log framework / pass the logger around.
// - We use IndexedDB to persists logs because it has generous disk space
// limits compared to local storage. IndexedDB does not work in incognito
// mode, in which case this module will not be able to write logs to disk.
// However, the logs will still be stored in-memory, so can still be
// submitted in a bug report should the user wish to: we can also store more
// logs in-memory than in local storage, which does work in incognito mode.
// We also need to handle the case where there are 2+ tabs. Each JS runtime
// generates a random string which serves as the "ID" for that tab/session.
// These IDs are stored along with the log lines.
// - Bug reports are sent as a POST over HTTPS: it purposefully does not use
// Matrix as bug reports may be made when Matrix is 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 recent, which we know because the "ID"s are
// actually timestamps. We then purge the remaining logs. We also do this
// purge on startup to prevent logs from accumulating.
const FLUSH_RATE_MS = 30 * 1000;
@ -60,9 +68,10 @@ class ConsoleLogger {
// We don't know what locale the user may be running so use ISO strings
const ts = new Date().toISOString();
// Some browsers support string formatting which we're not doing here
// so the lines are a little more ugly but easy to implement / quick to run.
// so the lines are a little more ugly but easy to implement / quick to
// run.
// Example line:
// 2017-01-18T11:23:53.214Z W Failed to set badge count: Error setting badge. Message: Too many badges requests in queue.
// 2017-01-18T11:23:53.214Z W Failed to set badge count
const line = `${ts} ${level} ${args.join(' ')}\n`;
// Using + really is the quickest way in JS
// http://jsperf.com/concat-vs-plus-vs-join
@ -74,7 +83,8 @@ class ConsoleLogger {
* @return {string} \n delimited log lines to flush.
*/
flush() {
// The ConsoleLogger doesn't care how these end up on disk, it just flushes them to the caller.
// The ConsoleLogger doesn't care how these end up on disk, it just
// flushes them to the caller.
const logsToFlush = this.logs;
this.logs = "";
return logsToFlush;
@ -105,7 +115,9 @@ class IndexedDBLogStore {
};
req.onerror = (event) => {
const err = "Failed to open log database: " + event.target.errorCode;
const err = (
"Failed to open log database: " + event.target.errorCode
);
console.error(err);
reject(new Error(err));
};
@ -117,8 +129,10 @@ class IndexedDBLogStore {
keyPath: ["id", "index"]
});
// Keys in the database look like: [ "instance-148938490", 0 ]
// Later on we need to query for everything with index=0, and query everything for an instance id.
// In order to do this, we need to set up indexes on both "id" and "index".
// Later on we need to query for everything with index=0, and
// query everything for an instance id.
// In order to do this, we need to set up indexes on both "id"
// and "index".
objectStore.createIndex("index", "index", { unique: false });
objectStore.createIndex("id", "id", { unique: false });
@ -151,23 +165,30 @@ class IndexedDBLogStore {
resolve();
};
txn.onerror = (event) => {
console.error("Failed to flush logs : " + event.target.errorCode);
reject(new Error("Failed to write logs: " + event.target.errorCode));
console.error(
"Failed to flush logs : " + event.target.errorCode
);
reject(
new Error("Failed to write logs: " + event.target.errorCode)
);
}
});
}
/**
* Consume the most recent logs and return them. Older logs which are not returned are deleted at the same time,
* so this can be called at startup to do house-keeping to keep the logs from growing too large.
* Consume the most recent logs and return them. Older logs which are not
* returned are deleted at the same time, so this can be called at startup
* to do house-keeping to keep the logs from growing too large.
*
* @param {boolean} clearAll True to clear the most recent logs returned in addition to the
* older logs. This is desirable when sending bug reports as we do not want to submit the
* same logs twice. This is not desirable when doing house-keeping at startup in case they
* want to submit a bug report later.
* @return {Promise<Object[]>} Resolves to an array of objects. The array is sorted in time (oldest first) based on
* when the log file was created (the log ID). The objects have said log ID in an "id" field and "lines" which is a
* big string with all the new-line delimited logs.
* @param {boolean} clearAll True to clear the most recent logs returned in
* addition to the older logs. This is desirable when sending bug reports as
* we do not want to submit the same logs twice. This is not desirable when
* doing house-keeping at startup in case they want to submit a bug report
* later.
* @return {Promise<Object[]>} Resolves to an array of objects. The array is
* sorted in time (oldest first) based on when the log file was created (the
* log ID). The objects have said log ID in an "id" field and "lines" which
* is a big string with all the new-line delimited logs.
*/
async consume(clearAll) {
const MAX_LOG_SIZE = 1024 * 1024 * 50; // 50 MB
@ -176,13 +197,15 @@ class IndexedDBLogStore {
// Returns: a string representing the concatenated logs for this ID.
function fetchLogs(id) {
const o = db.transaction("logs", "readonly").objectStore("logs");
return selectQuery(o.index("id"), IDBKeyRange.only(id), (cursor) => {
return selectQuery(o.index("id"), IDBKeyRange.only(id),
(cursor) => {
return {
lines: cursor.value.lines,
index: cursor.value.index,
}
}).then((linesArray) => {
// We have been storing logs periodically, so string them all together *in order of index* now
// We have been storing logs periodically, so string them all
// together *in order of index* now
linesArray.sort((a, b) => {
return a.index - b.index;
})
@ -192,13 +215,18 @@ class IndexedDBLogStore {
// Returns: A sorted array of log IDs. (newest first)
function fetchLogIds() {
// To gather all the log IDs, query for every log entry with index "0", this will let us
// know all the IDs from different tabs/sessions.
// To gather all the log IDs, query for every log entry with index
// "0", this will let us know all the IDs from different
// tabs/sessions.
const o = db.transaction("logs", "readonly").objectStore("logs");
return selectQuery(o.index("index"), IDBKeyRange.only(0), (cursor) => cursor.value.id).then((res) => {
// we know each entry has a unique ID, and we know IDs are timestamps, so accumulate all the IDs,
// ignoring the logs for now, and sort them to work out the correct log ID ordering, newest first.
// E.g. [ "instance-1484827160051", "instance-1374827160051", "instance-1000007160051"]
return selectQuery(o.index("index"), IDBKeyRange.only(0),
(cursor) => cursor.value.id).then((res) => {
// we know each entry has a unique ID, and we know IDs are
// timestamps, so accumulate all the IDs, ignoring the logs for
// now, and sort them to work out the correct log ID ordering,
// newest first.
// E.g. [ "instance-1484827160051", "instance-1374827160051",
// "instance-1000007160051"]
return res.sort().reverse();
});
}
@ -221,7 +249,12 @@ class IndexedDBLogStore {
resolve();
};
txn.onerror = (event) => {
reject(new Error(`Failed to delete logs for '${id}' : ${event.target.errorCode}`));
reject(
new Error(
"Failed to delete logs for " +
`'${id}' : ${event.target.errorCode}`
)
);
}
});
}
@ -238,7 +271,8 @@ class IndexedDBLogStore {
});
size += lines.length;
if (size > MAX_LOG_SIZE) {
// the remaining log IDs should be removed. If we go out of bounds this is just []
// the remaining log IDs should be removed. If we go out of
// bounds this is just []
removeLogIds = allLogIds.slice(i + 1);
break;
}
@ -248,7 +282,8 @@ class IndexedDBLogStore {
}
if (removeLogIds.length > 0) {
console.log("Removing logs: ", removeLogIds);
// Don't await this because it's non-fatal if we can't clean up logs.
// Don't await this because it's non-fatal if we can't clean up
// logs.
Promise.all(removeLogIds.map((id) => deleteLogs(id))).then(() => {
console.log(`Removed ${removeLogIds.length} old logs.`);
}, (err) => {
@ -271,9 +306,11 @@ class IndexedDBLogStore {
* Helper method to collect results from a Cursor and promiseify it.
* @param {ObjectStore|Index} store The store to perform openCursor on.
* @param {IDBKeyRange=} keyRange Optional key range to apply on the cursor.
* @param {Function} resultMapper A function which is repeatedly called with a Cursor.
* @param {Function} resultMapper A function which is repeatedly called with a
* Cursor.
* Return the data you want to keep.
* @return {Promise<T[]>} Resolves to an array of whatever you returned from resultMapper.
* @return {Promise<T[]>} Resolves to an array of whatever you returned from
* resultMapper.
*/
function selectQuery(store, keyRange, resultMapper) {
const query = store.openCursor(keyRange);
@ -355,7 +392,9 @@ module.exports = {
*/
sendBugReport: async function(userText) {
if (!logger) {
throw new Error("No console logger, did you forget to call init()?");
throw new Error(
"No console logger, did you forget to call init()?"
);
}
if (!bugReportEndpoint) {
throw new Error("No bug report endpoint has been set.");
@ -372,8 +411,8 @@ module.exports = {
userAgent = window.navigator.userAgent;
}
// If in incognito mode, store is null, but we still want bug report sending to work going off
// the in-memory console logs.
// If in incognito mode, store is null, but we still want bug report
// sending to work going off the in-memory console logs.
let logs = [];
if (store) {
logs = await store.consume(true);
@ -391,7 +430,9 @@ module.exports = {
url: bugReportEndpoint,
body: {
logs: logs,
text: userText || "User did not supply any additional text.",
text: (
userText || "User did not supply any additional text."
),
version: version,
user_agent: userAgent,
},