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backend/node_modules/pino/lib/tools.js

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+'use strict'
+
+/* eslint no-prototype-builtins: 0 */
+
+const diagChan = require('node:diagnostics_channel')
+const format = require('quick-format-unescaped')
+const { mapHttpRequest, mapHttpResponse } = require('pino-std-serializers')
+const SonicBoom = require('sonic-boom')
+const onExit = require('on-exit-leak-free')
+const {
+  lsCacheSym,
+  chindingsSym,
+  writeSym,
+  serializersSym,
+  formatOptsSym,
+  endSym,
+  stringifiersSym,
+  stringifySym,
+  stringifySafeSym,
+  wildcardFirstSym,
+  nestedKeySym,
+  formattersSym,
+  messageKeySym,
+  errorKeySym,
+  nestedKeyStrSym,
+  msgPrefixSym
+} = require('./symbols')
+const { isMainThread } = require('worker_threads')
+const transport = require('./transport')
+
+let asJsonChan
+// Node >= 18.19 supports diagnostics_channel.tracingChannel
+if (typeof diagChan.tracingChannel === 'function') {
+  asJsonChan = diagChan.tracingChannel('pino_asJson')
+} else {
+  // Older Node 18.x (e.g. 18.18), provided a no-op fallback
+  asJsonChan = {
+    hasSubscribers: false,
+    traceSync (fn, store, thisArg, ...args) {
+      return fn.call(thisArg, ...args)
+    }
+  }
+}
+
+function noop () {
+}
+
+function genLog (level, hook) {
+  if (!hook) return LOG
+
+  return function hookWrappedLog (...args) {
+    hook.call(this, args, LOG, level)
+  }
+
+  function LOG (o, ...n) {
+    if (typeof o === 'object') {
+      let msg = o
+      if (o !== null) {
+        if (o.method && o.headers && o.socket) {
+          o = mapHttpRequest(o)
+        } else if (typeof o.setHeader === 'function') {
+          o = mapHttpResponse(o)
+        }
+      }
+      let formatParams
+      if (msg === null && n.length === 0) {
+        formatParams = [null]
+      } else {
+        msg = n.shift()
+        formatParams = n
+      }
+      // We do not use a coercive check for `msg` as it is
+      // measurably slower than the explicit checks.
+      if (typeof this[msgPrefixSym] === 'string' && msg !== undefined && msg !== null) {
+        msg = this[msgPrefixSym] + msg
+      }
+      this[writeSym](o, format(msg, formatParams, this[formatOptsSym]), level)
+    } else {
+      let msg = o === undefined ? n.shift() : o
+
+      // We do not use a coercive check for `msg` as it is
+      // measurably slower than the explicit checks.
+      if (typeof this[msgPrefixSym] === 'string' && msg !== undefined && msg !== null) {
+        msg = this[msgPrefixSym] + msg
+      }
+      this[writeSym](null, format(msg, n, this[formatOptsSym]), level)
+    }
+  }
+}
+
+// magically escape strings for json
+// relying on their charCodeAt
+// everything below 32 needs JSON.stringify()
+// 34 and 92 happens all the time, so we
+// have a fast case for them
+function asString (str) {
+  let result = ''
+  let last = 0
+  let found = false
+  let point = 255
+  const l = str.length
+  if (l > 100) {
+    return JSON.stringify(str)
+  }
+  for (var i = 0; i < l && point >= 32; i++) {
+    point = str.charCodeAt(i)
+    if (point === 34 || point === 92) {
+      result += str.slice(last, i) + '\\'
+      last = i
+      found = true
+    }
+  }
+  if (!found) {
+    result = str
+  } else {
+    result += str.slice(last)
+  }
+  return point < 32 ? JSON.stringify(str) : '"' + result + '"'
+}
+
+/**
+ * `asJson` wraps `_asJson` in order to facilitate generating diagnostics.
+ *
+ * @param {object} obj The merging object passed to the log method.
+ * @param {string} msg The log message passed to the log method.
+ * @param {number} num The log level number.
+ * @param {number} time The log time in milliseconds.
+ *
+ * @returns {string}
+ */
+function asJson (obj, msg, num, time) {
+  if (asJsonChan.hasSubscribers === false) {
+    return _asJson.call(this, obj, msg, num, time)
+  }
+
+  const store = { instance: this, arguments }
+  return asJsonChan.traceSync(_asJson, store, this, obj, msg, num, time)
+}
+
+/**
+ * `_asJson` parses all collected data and generates the finalized newline
+ * delimited JSON string.
+ *
+ * @param {object} obj The merging object passed to the log method.
+ * @param {string} msg The log message passed to the log method.
+ * @param {number} num The log level number.
+ * @param {number} time The log time in milliseconds.
+ *
+ * @returns {string} The finalized log string terminated with a newline.
+ * @private
+ */
+function _asJson (obj, msg, num, time) {
+  const stringify = this[stringifySym]
+  const stringifySafe = this[stringifySafeSym]
+  const stringifiers = this[stringifiersSym]
+  const end = this[endSym]
+  const chindings = this[chindingsSym]
+  const serializers = this[serializersSym]
+  const formatters = this[formattersSym]
+  const messageKey = this[messageKeySym]
+  const errorKey = this[errorKeySym]
+  let data = this[lsCacheSym][num] + time
+
+  // we need the child bindings added to the output first so instance logged
+  // objects can take precedence when JSON.parse-ing the resulting log line
+  data = data + chindings
+
+  let value
+  if (formatters.log) {
+    obj = formatters.log(obj)
+  }
+  const wildcardStringifier = stringifiers[wildcardFirstSym]
+  let propStr = ''
+  for (const key in obj) {
+    value = obj[key]
+    if (Object.prototype.hasOwnProperty.call(obj, key) && value !== undefined) {
+      if (serializers[key]) {
+        value = serializers[key](value)
+      } else if (key === errorKey && serializers.err) {
+        value = serializers.err(value)
+      }
+
+      const stringifier = stringifiers[key] || wildcardStringifier
+
+      switch (typeof value) {
+        case 'undefined':
+        case 'function':
+          continue
+        case 'number':
+          /* eslint no-fallthrough: "off" */
+          if (Number.isFinite(value) === false) {
+            value = null
+          }
+        // this case explicitly falls through to the next one
+        case 'boolean':
+          if (stringifier) value = stringifier(value)
+          break
+        case 'string':
+          value = (stringifier || asString)(value)
+          break
+        default:
+          value = (stringifier || stringify)(value, stringifySafe)
+      }
+      if (value === undefined) continue
+      const strKey = asString(key)
+      propStr += ',' + strKey + ':' + value
+    }
+  }
+
+  let msgStr = ''
+  if (msg !== undefined) {
+    value = serializers[messageKey] ? serializers[messageKey](msg) : msg
+    const stringifier = stringifiers[messageKey] || wildcardStringifier
+
+    switch (typeof value) {
+      case 'function':
+        break
+      case 'number':
+        /* eslint no-fallthrough: "off" */
+        if (Number.isFinite(value) === false) {
+          value = null
+        }
+      // this case explicitly falls through to the next one
+      case 'boolean':
+        if (stringifier) value = stringifier(value)
+        msgStr = ',"' + messageKey + '":' + value
+        break
+      case 'string':
+        value = (stringifier || asString)(value)
+        msgStr = ',"' + messageKey + '":' + value
+        break
+      default:
+        value = (stringifier || stringify)(value, stringifySafe)
+        msgStr = ',"' + messageKey + '":' + value
+    }
+  }
+
+  if (this[nestedKeySym] && propStr) {
+    // place all the obj properties under the specified key
+    // the nested key is already formatted from the constructor
+    return data + this[nestedKeyStrSym] + propStr.slice(1) + '}' + msgStr + end
+  } else {
+    return data + propStr + msgStr + end
+  }
+}
+
+function asChindings (instance, bindings) {
+  let value
+  let data = instance[chindingsSym]
+  const stringify = instance[stringifySym]
+  const stringifySafe = instance[stringifySafeSym]
+  const stringifiers = instance[stringifiersSym]
+  const wildcardStringifier = stringifiers[wildcardFirstSym]
+  const serializers = instance[serializersSym]
+  const formatter = instance[formattersSym].bindings
+  bindings = formatter(bindings)
+
+  for (const key in bindings) {
+    value = bindings[key]
+    const valid = (key.length < 5 || (key !== 'level' &&
+      key !== 'serializers' &&
+      key !== 'formatters' &&
+      key !== 'customLevels')) &&
+      bindings.hasOwnProperty(key) &&
+      value !== undefined
+    if (valid === true) {
+      value = serializers[key] ? serializers[key](value) : value
+      value = (stringifiers[key] || wildcardStringifier || stringify)(value, stringifySafe)
+      if (value === undefined) continue
+      data += ',"' + key + '":' + value
+    }
+  }
+  return data
+}
+
+function hasBeenTampered (stream) {
+  return stream.write !== stream.constructor.prototype.write
+}
+
+function buildSafeSonicBoom (opts) {
+  const stream = new SonicBoom(opts)
+  stream.on('error', filterBrokenPipe)
+  // If we are sync: false, we must flush on exit
+  if (!opts.sync && isMainThread) {
+    onExit.register(stream, autoEnd)
+
+    stream.on('close', function () {
+      onExit.unregister(stream)
+    })
+  }
+  return stream
+
+  function filterBrokenPipe (err) {
+    // Impossible to replicate across all operating systems
+    /* istanbul ignore next */
+    if (err.code === 'EPIPE') {
+      // If we get EPIPE, we should stop logging here
+      // however we have no control to the consumer of
+      // SonicBoom, so we just overwrite the write method
+      stream.write = noop
+      stream.end = noop
+      stream.flushSync = noop
+      stream.destroy = noop
+      return
+    }
+    stream.removeListener('error', filterBrokenPipe)
+    stream.emit('error', err)
+  }
+}
+
+function autoEnd (stream, eventName) {
+  // This check is needed only on some platforms
+  /* istanbul ignore next */
+  if (stream.destroyed) {
+    return
+  }
+
+  if (eventName === 'beforeExit') {
+    // We still have an event loop, let's use it
+    stream.flush()
+    stream.on('drain', function () {
+      stream.end()
+    })
+  } else {
+    // For some reason istanbul is not detecting this, but it's there
+    /* istanbul ignore next */
+    // We do not have an event loop, so flush synchronously
+    stream.flushSync()
+  }
+}
+
+function createArgsNormalizer (defaultOptions) {
+  return function normalizeArgs (instance, caller, opts = {}, stream) {
+    // support stream as a string
+    if (typeof opts === 'string') {
+      stream = buildSafeSonicBoom({ dest: opts })
+      opts = {}
+    } else if (typeof stream === 'string') {
+      if (opts && opts.transport) {
+        throw Error('only one of option.transport or stream can be specified')
+      }
+      stream = buildSafeSonicBoom({ dest: stream })
+    } else if (opts instanceof SonicBoom || opts.writable || opts._writableState) {
+      stream = opts
+      opts = {}
+    } else if (opts.transport) {
+      if (opts.transport instanceof SonicBoom || opts.transport.writable || opts.transport._writableState) {
+        throw Error('option.transport do not allow stream, please pass to option directly. e.g. pino(transport)')
+      }
+      if (opts.transport.targets && opts.transport.targets.length && opts.formatters && typeof opts.formatters.level === 'function') {
+        throw Error('option.transport.targets do not allow custom level formatters')
+      }
+
+      let customLevels
+      if (opts.customLevels) {
+        customLevels = opts.useOnlyCustomLevels ? opts.customLevels : Object.assign({}, opts.levels, opts.customLevels)
+      }
+      stream = transport({ caller, ...opts.transport, levels: customLevels })
+    }
+    opts = Object.assign({}, defaultOptions, opts)
+    opts.serializers = Object.assign({}, defaultOptions.serializers, opts.serializers)
+    opts.formatters = Object.assign({}, defaultOptions.formatters, opts.formatters)
+
+    if (opts.prettyPrint) {
+      throw new Error('prettyPrint option is no longer supported, see the pino-pretty package (https://github.com/pinojs/pino-pretty)')
+    }
+
+    const { enabled, onChild } = opts
+    if (enabled === false) opts.level = 'silent'
+    if (!onChild) opts.onChild = noop
+    if (!stream) {
+      if (!hasBeenTampered(process.stdout)) {
+        // If process.stdout.fd is undefined, it means that we are running
+        // in a worker thread. Let's assume we are logging to file descriptor 1.
+        stream = buildSafeSonicBoom({ fd: process.stdout.fd || 1 })
+      } else {
+        stream = process.stdout
+      }
+    }
+    return { opts, stream }
+  }
+}
+
+function stringify (obj, stringifySafeFn) {
+  try {
+    return JSON.stringify(obj)
+  } catch (_) {
+    try {
+      const stringify = stringifySafeFn || this[stringifySafeSym]
+      return stringify(obj)
+    } catch (_) {
+      return '"[unable to serialize, circular reference is too complex to analyze]"'
+    }
+  }
+}
+
+function buildFormatters (level, bindings, log) {
+  return {
+    level,
+    bindings,
+    log
+  }
+}
+
+/**
+ * Convert a string integer file descriptor to a proper native integer
+ * file descriptor.
+ *
+ * @param {string} destination The file descriptor string to attempt to convert.
+ *
+ * @returns {Number}
+ */
+function normalizeDestFileDescriptor (destination) {
+  const fd = Number(destination)
+  if (typeof destination === 'string' && Number.isFinite(fd)) {
+    return fd
+  }
+  // destination could be undefined if we are in a worker
+  if (destination === undefined) {
+    // This is stdout in UNIX systems
+    return 1
+  }
+  return destination
+}
+
+module.exports = {
+  noop,
+  buildSafeSonicBoom,
+  asChindings,
+  asJson,
+  genLog,
+  createArgsNormalizer,
+  stringify,
+  buildFormatters,
+  normalizeDestFileDescriptor
+}