'use strict';
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const path = require('path');
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const fs = require('mz/fs');
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const utility = require('utility');
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module.exports = (_, app) => {
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return async (ctx, next) => {
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if (ctx.path !== '/__loader_trace__') return await next();
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const template = await fs.readFile(path.join(__dirname, '../../lib/loader_trace.html'), 'utf8');
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const data = await loadTimingData(app);
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ctx.body = template.replace('{{placeholder}}', JSON.stringify(data));
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};
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};
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async function loadTimingData(app) {
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const rundir = app.config.rundir;
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const files = await fs.readdir(rundir);
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const data = [];
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for (const file of files) {
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if (!/^(agent|application)_timing/.test(file)) continue;
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const json = await utility.readJSON(path.join(rundir, file));
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const isAgent = /^agent/.test(file);
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for (const item of json) {
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if (isAgent) {
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item.type = 'agent';
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} else {
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item.type = `app_${item.pid}`;
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}
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item.pid = String(item.pid);
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item.range = [ item.start, item.end ];
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item.title = `${item.type}(${item.index})`;
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data.push(item);
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}
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}
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return data;
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}
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