All files / lib/internal stream_base_commons.js

97.85% Statements 274/280
93.65% Branches 59/63
100% Functions 8/8
97.85% Lines 274/280

Press n or j to go to the next uncovered block, b, p or k for the previous block.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 28123x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 273x 23x 23x 23x 23x 23x 67391x 67391x 67391x 67391x 67391x 45886x 45886x 45886x 45886x 45885x 45885x 67391x 67391x 3153x 67391x 67391x 18320x 67391x 6x 67391x 67391x 67391x 67391x 4x 67391x 22x 22x 22x 22x 22x 22x 22x 67391x 67391x 23x 5240x 5240x 5240x 5240x 5240x 5240x 44x 44x 44x 44x 5196x 5196x 5196x 5240x 7x 7x 7x     7x 7x 5189x 5189x 5189x 5189x 5189x 5189x 5240x 23x 80549x 80549x 80549x 80549x 80549x 80549x 80549x 80549x 80549x 80549x 80549x 80549x 23x 13157x 13157x 13157x 13157x 13157x 319x 319x 319x 13157x 12838x 12838x 71402x 71402x 71402x 71402x 12838x 13157x 13157x 13157x 13157x 13157x 13157x 13157x 13157x 23x 67392x 67392x 67392x 67392x 67392x 67392x 67392x 23x 80547x 80547x 80547x 80547x 80547x 80547x 80546x 80547x 75292x 75292x 80547x 23x 61307x 61307x 61307x 61307x 61307x 61307x 61307x 61307x 61307x 41423x 41423x 41423x 41423x 2084x 2084x 2084x 24x 24x 24x 24x 41423x 39339x 39339x 39339x 39339x 41423x 12697x 12697x 12681x 12681x 12681x 12681x 12697x 41412x 41412x 41412x 61307x 61307x     61307x 61307x 61307x 61307x 61307x 61307x 61307x 61307x 6x 6x 6x 6x 6x 61307x 61307x 61307x     61307x 19878x 19878x 19878x 19878x 19878x 19878x 19878x 19878x 19878x 61307x 23x 28353x 28353x 28353x 28020x 28020x 28020x 28020x 28020x 28020x 28020x 28020x 28020x 28020x 28044x 24752x 922x 922x 922x 28353x 2818x 2818x 2818x 2818x 1460x 1460x 1460x 2818x 27552x 28353x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x  
'use strict';
 
const {
  Array,
  Symbol,
} = primordials;
 
const { Buffer } = require('buffer');
const { FastBuffer } = require('internal/buffer');
const {
  WriteWrap,
  kReadBytesOrError,
  kArrayBufferOffset,
  kBytesWritten,
  kLastWriteWasAsync,
  streamBaseState
} = internalBinding('stream_wrap');
const { UV_EOF } = internalBinding('uv');
const {
  errnoException
} = require('internal/errors');
const { owner_symbol } = require('internal/async_hooks').symbols;
const {
  kTimeout,
  setUnrefTimeout,
  getTimerDuration
} = require('internal/timers');
const { isUint8Array } = require('internal/util/types');
const { clearTimeout } = require('timers');
const { validateFunction } = require('internal/validators');
 
const kMaybeDestroy = Symbol('kMaybeDestroy');
const kUpdateTimer = Symbol('kUpdateTimer');
const kAfterAsyncWrite = Symbol('kAfterAsyncWrite');
const kHandle = Symbol('kHandle');
const kSession = Symbol('kSession');
 
let debug = require('internal/util/debuglog').debuglog('stream', (fn) => {
  debug = fn;
});
const kBuffer = Symbol('kBuffer');
const kBufferGen = Symbol('kBufferGen');
const kBufferCb = Symbol('kBufferCb');
 
function handleWriteReq(req, data, encoding) {
  const { handle } = req;
 
  switch (encoding) {
    case 'buffer':
    {
      const ret = handle.writeBuffer(req, data);
      if (streamBaseState[kLastWriteWasAsync])
        req.buffer = data;
      return ret;
    }
    case 'latin1':
    case 'binary':
      return handle.writeLatin1String(req, data);
    case 'utf8':
    case 'utf-8':
      return handle.writeUtf8String(req, data);
    case 'ascii':
      return handle.writeAsciiString(req, data);
    case 'ucs2':
    case 'ucs-2':
    case 'utf16le':
    case 'utf-16le':
      return handle.writeUcs2String(req, data);
    default:
    {
      const buffer = Buffer.from(data, encoding);
      const ret = handle.writeBuffer(req, buffer);
      if (streamBaseState[kLastWriteWasAsync])
        req.buffer = buffer;
      return ret;
    }
  }
}
 
function onWriteComplete(status) {
  debug('onWriteComplete', status, this.error);
 
  const stream = this.handle[owner_symbol];
 
  if (stream.destroyed) {
    if (typeof this.callback === 'function')
      this.callback(null);
    return;
  }
 
  // TODO (ronag): This should be moved before if(stream.destroyed)
  // in order to avoid swallowing error.
  if (status < 0) {
    const ex = errnoException(status, 'write', this.error);
    if (typeof this.callback === 'function')
      this.callback(ex);
    else
      stream.destroy(ex);
    return;
  }
 
  stream[kUpdateTimer]();
  stream[kAfterAsyncWrite](this);
 
  if (typeof this.callback === 'function')
    this.callback(null);
}
 
function createWriteWrap(handle, callback) {
  const req = new WriteWrap();
 
  req.handle = handle;
  req.oncomplete = onWriteComplete;
  req.async = false;
  req.bytes = 0;
  req.buffer = null;
  req.callback = callback;
 
  return req;
}
 
function writevGeneric(self, data, cb) {
  const req = createWriteWrap(self[kHandle], cb);
  const allBuffers = data.allBuffers;
  let chunks;
  if (allBuffers) {
    chunks = data;
    for (let i = 0; i < data.length; i++)
      data[i] = data[i].chunk;
  } else {
    chunks = new Array(data.length << 1);
    for (let i = 0; i < data.length; i++) {
      const entry = data[i];
      chunks[i * 2] = entry.chunk;
      chunks[i * 2 + 1] = entry.encoding;
    }
  }
  const err = req.handle.writev(req, chunks, allBuffers);
 
  // Retain chunks
  if (err === 0) req._chunks = chunks;
 
  afterWriteDispatched(req, err, cb);
  return req;
}
 
function writeGeneric(self, data, encoding, cb) {
  const req = createWriteWrap(self[kHandle], cb);
  const err = handleWriteReq(req, data, encoding);
 
  afterWriteDispatched(req, err, cb);
  return req;
}
 
function afterWriteDispatched(req, err, cb) {
  req.bytes = streamBaseState[kBytesWritten];
  req.async = !!streamBaseState[kLastWriteWasAsync];
 
  if (err !== 0)
    return cb(errnoException(err, 'write', req.error));
 
  if (!req.async && typeof req.callback === 'function') {
    req.callback();
  }
}
 
function onStreamRead(arrayBuffer) {
  const nread = streamBaseState[kReadBytesOrError];
 
  const handle = this;
  const stream = this[owner_symbol];
 
  stream[kUpdateTimer]();
 
  if (nread > 0 && !stream.destroyed) {
    let ret;
    let result;
    const userBuf = stream[kBuffer];
    if (userBuf) {
      result = (stream[kBufferCb](nread, userBuf) !== false);
      const bufGen = stream[kBufferGen];
      if (bufGen !== null) {
        const nextBuf = bufGen();
        if (isUint8Array(nextBuf))
          stream[kBuffer] = ret = nextBuf;
      }
    } else {
      const offset = streamBaseState[kArrayBufferOffset];
      const buf = new FastBuffer(arrayBuffer, offset, nread);
      result = stream.push(buf);
    }
    if (!result) {
      handle.reading = false;
      if (!stream.destroyed) {
        const err = handle.readStop();
        if (err)
          stream.destroy(errnoException(err, 'read'));
      }
    }
 
    return ret;
  }
 
  if (nread === 0) {
    return;
  }
 
  // After seeing EOF, most streams will be closed permanently,
  // and will not deliver any more read events after this point.
  // (equivalently, it should have called readStop on itself already).
  // Some streams may be reset and explicitly started again with a call
  // to readStart, such as TTY.
 
  if (nread !== UV_EOF) {
    // CallJSOnreadMethod expects the return value to be a buffer.
    // Ref: https://github.com/nodejs/node/pull/34375
    stream.destroy(errnoException(nread, 'read'));
    return;
  }
 
  // Defer this until we actually emit end
  if (stream._readableState.endEmitted) {
    if (stream[kMaybeDestroy])
      stream[kMaybeDestroy]();
  } else {
    if (stream[kMaybeDestroy])
      stream.on('end', stream[kMaybeDestroy]);
 
    // Push a null to signal the end of data.
    // Do it before `maybeDestroy` for correct order of events:
    // `end` -> `close`
    stream.push(null);
    stream.read(0);
  }
}
 
function setStreamTimeout(msecs, callback) {
  if (this.destroyed)
    return this;
 
  this.timeout = msecs;
 
  // Type checking identical to timers.enroll()
  msecs = getTimerDuration(msecs, 'msecs');
 
  // Attempt to clear an existing timer in both cases -
  //  even if it will be rescheduled we don't want to leak an existing timer.
  clearTimeout(this[kTimeout]);
 
  if (msecs === 0) {
    if (callback !== undefined) {
      validateFunction(callback, 'callback');
      this.removeListener('timeout', callback);
    }
  } else {
    this[kTimeout] = setUnrefTimeout(this._onTimeout.bind(this), msecs);
    if (this[kSession]) this[kSession][kUpdateTimer]();
 
    if (callback !== undefined) {
      validateFunction(callback, 'callback');
      this.once('timeout', callback);
    }
  }
  return this;
}
 
module.exports = {
  writevGeneric,
  writeGeneric,
  onStreamRead,
  kAfterAsyncWrite,
  kMaybeDestroy,
  kUpdateTimer,
  kHandle,
  kSession,
  setStreamTimeout,
  kBuffer,
  kBufferCb,
  kBufferGen
};