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New error trace stringifier

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Cadence Ember 2025-03-12 16:01:36 +13:00
commit dd63ac7d44
4 changed files with 85 additions and 25 deletions
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67
src/m2d/event-dispatcher.js
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@ -28,6 +28,58 @@ const {reg} = require("../matrix/read-registration")
let lastReportedEvent = 0
/**
* This function is adapted from Evan Kaufman's fantastic work.
* The original function and my adapted function are both MIT licensed.
* @url https://github.com/EvanK/npm-loggable-error/
* @param {number} [depth]
* @returns {string}
*/
function stringifyErrorStack(err, depth = 0) {
let collapsed = " ".repeat(depth);
if (!(err instanceof Error)) {
return collapsed + err
}
// add full stack trace if one exists, otherwise convert to string
let stackLines = ( err?.stack ?? `${err}` ).replace(/^/gm, " ".repeat(depth)).trim().split("\n")
let cloudstormLine = stackLines.findIndex(l => l.includes("/node_modules/cloudstorm/"))
if (cloudstormLine !== -1) {
stackLines = stackLines.slice(0, cloudstormLine - 2)
}
collapsed += stackLines.join("\n")
const props = Object.getOwnPropertyNames(err).filter(p => !["message", "stack"].includes(p))
// only break into object notation if we have addtl props to dump
if (props.length) {
const dedent = " ".repeat(depth);
const indent = " ".repeat(depth + 2);
collapsed += " {\n";
// loop and print each (indented) prop name
for (let property of props) {
collapsed += `${indent}[${property}]: `;
// if another error object, stringify it too
if (err[property] instanceof Error) {
collapsed += stringifyErrorStack(err[property], depth + 2).trimStart();
}
// otherwise stringify as JSON
else {
collapsed += JSON.stringify(err[property]);
}
collapsed += "\n";
}
collapsed += `${dedent}}\n`;
}
return collapsed;
}
function guard(type, fn) {
return async function(event, ...args) {
try {
@ -39,7 +91,12 @@ function guard(type, fn) {
if (Date.now() - lastReportedEvent < 5000) return
lastReportedEvent = Date.now()
const cloudflareErrorTitle = e.toString().match(/<!DOCTYPE html>.*?<title>discord\.com \| ([^<]*)<\/title>/s)?.[1]
let errorIntroLine = e.toString()
if (e.cause) {
errorIntroLine += ` (cause: ${e.cause})`
}
const cloudflareErrorTitle = errorIntroLine.match(/<!DOCTYPE html>.*?<title>discord\.com \| ([^<]*)<\/title>/s)?.[1]
if (cloudflareErrorTitle) {
return api.sendEvent(event.room_id, "m.room.message", {
msgtype: "m.text",
@ -53,16 +110,16 @@ function guard(type, fn) {
})
}
let stackLines = e.stack.split("\n")
const stack = stringifyErrorStack(e)
api.sendEvent(event.room_id, "m.room.message", {
msgtype: "m.text",
body: "\u26a0 Matrix event not delivered to Discord. See formatted content for full details.",
format: "org.matrix.custom.html",
formatted_body: "\u26a0 <strong>Matrix event not delivered to Discord</strong>"
+ `<br>Event type: ${type}`
+ `<br>${e.toString()}`
+ `<br>${errorIntroLine}`
+ `<br><details><summary>Error trace</summary>`
+ `<pre>${stackLines.join("\n")}</pre></details>`
+ `<pre>${stack}</pre></details>`
+ `<details><summary>Original payload</summary>`
+ `<pre>${util.inspect(event, false, 4, false)}</pre></details>`,
"moe.cadence.ooye.error": {
@ -297,3 +354,5 @@ async event => {
db.prepare("UPDATE member_cache SET power_level = ? WHERE room_id = ? AND mxid = ?").run(newPower[mxid] || 0, event.room_id, mxid)
}
}))
module.exports.stringifyErrorStack = stringifyErrorStack