All files / lib/internal stream_base_commons.js

96.18% Statements 277/288
93.33% Branches 70/75
100% Functions 8/8
96.18% Lines 277/288

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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 28923x 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 267x 23x 23x 23x 23x 23x 68810x 68810x 68810x 68810x 68810x 45646x 45646x 45646x 45646x 45645x 45645x 68810x 68810x 3014x 68810x 68810x 20119x 68810x 5x 68810x 68810x 68810x 68810x 4x 68810x 22x 22x 22x 22x 22x 22x 22x 68810x 68810x 23x 5266x 5266x 5266x 5266x 5266x 5266x 365x 365x 365x 365x 4901x 4901x 4901x 5266x 7x 7x 7x     7x 7x 4894x 4894x 4894x 4894x 4894x 4894x 5266x 23x 81905x 81905x 81905x 81905x 81905x 81905x 81905x 81905x 81905x 81905x 81905x 81905x 23x 13094x 13094x 13094x 13094x 13094x 317x 317x 317x 13094x 12777x 12777x 70561x 70561x 70561x 70561x 12777x 13094x 13094x 13094x 13094x 13094x 13094x 13094x 13094x 23x 68811x 68811x 68811x 68811x 68811x 68811x 68811x 23x 81903x 81903x 81903x 81903x 81903x 81903x 81890x 81903x 76622x 76622x 81903x 23x 61353x 61353x 61353x 61353x 61353x 61353x 61353x 61353x 61353x 41708x 41708x 41708x 41708x 2084x 2084x 2084x 24x 24x 24x 24x 41708x 39624x 39624x 39624x 39624x 41699x 12526x 12526x 12510x 12510x 12510x 12510x 12526x 41698x 41698x 41698x 19645x 61230x     19645x 61222x 6x 6x 6x 6x 6x 19639x 19639x 61216x     61216x 19639x 19639x 19639x 19639x 19639x 19639x 19639x 19639x 19638x 19638x           19638x 19639x 19639x 19639x 19639x 19639x 19639x 19639x 61353x 23x 28125x 28125x 28125x 27368x 27368x 27368x 27368x 27368x 27368x 27368x 27368x 27368x 27368x 27822x 24662x 859x 859x 859x 28125x 2691x 2691x 2691x 2691x 1390x 1390x 1390x 2691x 27335x 28125x 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 { validateCallback } = 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;
  }
 
  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]);
 
    // TODO(ronag): Without this `readStop`, `onStreamRead`
    // will be called once more (i.e. after Readable.ended)
    // on Windows causing a ECONNRESET, failing the
    // test-https-truncate test.
    if (handle.readStop) {
      const err = handle.readStop();
      if (err) {
        // CallJSOnreadMethod expects the return value to be a buffer.
        // Ref: https://github.com/nodejs/node/pull/34375
        stream.destroy(errnoException(err, 'read'));
        return;
      }
    }
 
    // 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) {
      validateCallback(callback);
      this.removeListener('timeout', callback);
    }
  } else {
    this[kTimeout] = setUnrefTimeout(this._onTimeout.bind(this), msecs);
    if (this[kSession]) this[kSession][kUpdateTimer]();
 
    if (callback !== undefined) {
      validateCallback(callback);
      this.once('timeout', callback);
    }
  }
  return this;
}
 
module.exports = {
  writevGeneric,
  writeGeneric,
  onStreamRead,
  kAfterAsyncWrite,
  kMaybeDestroy,
  kUpdateTimer,
  kHandle,
  kSession,
  setStreamTimeout,
  kBuffer,
  kBufferCb,
  kBufferGen
};