whistle/lib/service/console-log.js

HTTP, HTTP2, HTTPS, Websocket debugging proxy

var MAX_LENGTH = 800;
var MIN_LENGTH = 720;
var SIZE = 1024 * 512;
var COUNT = 100;
var logIndex = 0;
var logs = [];
var LEVEL_RE = /^fatal|error|warn|info|debug$/;

function sliceLogs(index, count, logId) {
  if (!logId) {
    return logs.slice(index, index + count);
  }
  var result = [];
  for (var len = logs.length; index < len; index++) {
    var log = logs[index];
    if (log.logId === logId) {
      result.push(log);
      if (--count <= 0) {
        return result;
      }
    }
  }
  return result;
}

function getLogs(startTime, count, logId) {
  var len = logs.length;
  if (!len || startTime == -1) {
    return [];
  }

  count = Math.min(count || COUNT, len);
  if (startTime === 0) {
    return logs.slice(-1);
  }

  if (startTime != -2 && startTime) {
    for (var i = 0; i < len; i++) {
      var log = logs[i];
      if (log.id === startTime) {
        return sliceLogs(i + 1, count, logId);
      }
    }
  }
  return sliceLogs(0, count, logId);
}

function getLogIndex() {
  ++logIndex;
  if (logIndex > 999999) {
    logIndex = 0;
  }
  return logIndex;
}

exports.addLog = function set(log) {
  if (!log) {
    return;
  }

  var now = Date.now();
  var text = log.text;
  if (text == null) {
    text = '';
  } else if (typeof text != 'string') {
    text += '';
  }
  var overflow = text.length - SIZE;
  logs.push({
    id: now + '-' + getLogIndex(),
    logId: log.id,
    date: (log.t && parseInt(log.t, 10)) || now,
    level: LEVEL_RE.test(log.level)
        ? log.level
        : 'info',
    text: overflow > 9 ? text.substring(0, SIZE) + '...(' + overflow + ')' : text
  });
  var len = logs.length;
  if (len > MAX_LENGTH) {
    logs = logs.slice(len - MIN_LENGTH, len);
  }
};
exports.getLogs = getLogs;
exports.getLatestId = function () {
  var last = logs[logs.length - 1];
  return last && last.id;
};