Backend half
This commit is contained in:
+770
@@ -0,0 +1,770 @@
|
||||
// SPDX-License-Identifier: LGPL-2.1-or-later
|
||||
// Copyright (c) 2015-2025 MariaDB Corporation Ab
|
||||
|
||||
'use strict';
|
||||
|
||||
const Iconv = require('iconv-lite');
|
||||
const Utils = require('../misc/utils');
|
||||
const Errors = require('../misc/errors');
|
||||
const Collations = require('../const/collations');
|
||||
|
||||
const QUOTE = 0x27;
|
||||
const DBL_QUOTE = 0x22;
|
||||
const ZERO_BYTE = 0x00;
|
||||
const SLASH = 0x5c;
|
||||
|
||||
//increase by level to avoid buffer copy.
|
||||
const SMALL_BUFFER_SIZE = 256;
|
||||
const MEDIUM_BUFFER_SIZE = 16384; //16k
|
||||
const LARGE_BUFFER_SIZE = 131072; //128k
|
||||
const BIG_BUFFER_SIZE = 1048576; //1M
|
||||
const MAX_BUFFER_SIZE = 16777219; //16M + 4
|
||||
const CHARS_GLOBAL_REGEXP = /[\000\032"'\\\n\r\t]/g;
|
||||
|
||||
/**
|
||||
* MySQL packet builder.
|
||||
*
|
||||
* @param opts options
|
||||
* @param info connection info
|
||||
* @constructor
|
||||
*/
|
||||
class PacketOutputStream {
|
||||
constructor(opts, info) {
|
||||
this.opts = opts;
|
||||
this.info = info;
|
||||
this.pos = 4;
|
||||
this.markPos = -1;
|
||||
this.bufContainDataAfterMark = false;
|
||||
this.cmdLength = 0;
|
||||
this.buf = Buffer.allocUnsafe(SMALL_BUFFER_SIZE);
|
||||
this.maxAllowedPacket = opts.maxAllowedPacket || 16777216;
|
||||
this.maxPacketLength = Math.min(MAX_BUFFER_SIZE, this.maxAllowedPacket + 4);
|
||||
|
||||
this.changeEncoding(this.opts.collation ? this.opts.collation : Collations.fromIndex(224));
|
||||
this.changeDebug(this.opts.debug);
|
||||
|
||||
this.opts.on('collation', this.changeEncoding.bind(this));
|
||||
this.opts.on('debug', this.changeDebug.bind(this));
|
||||
}
|
||||
|
||||
changeEncoding(collation) {
|
||||
this.encoding = collation.charset;
|
||||
if (this.encoding === 'utf8') {
|
||||
this.writeString = this.writeDefaultBufferString;
|
||||
this.encodeString = this.encodeNodeString;
|
||||
this.writeLengthEncodedString = this.writeDefaultBufferLengthEncodedString;
|
||||
this.writeStringEscapeQuote = this.writeUtf8StringEscapeQuote;
|
||||
} else if (Buffer.isEncoding(this.encoding)) {
|
||||
this.writeString = this.writeDefaultBufferString;
|
||||
this.encodeString = this.encodeNodeString;
|
||||
this.writeLengthEncodedString = this.writeDefaultBufferLengthEncodedString;
|
||||
this.writeStringEscapeQuote = this.writeDefaultStringEscapeQuote;
|
||||
} else {
|
||||
this.writeString = this.writeDefaultIconvString;
|
||||
this.encodeString = this.encodeIconvString;
|
||||
this.writeLengthEncodedString = this.writeDefaultIconvLengthEncodedString;
|
||||
this.writeStringEscapeQuote = this.writeDefaultStringEscapeQuote;
|
||||
}
|
||||
}
|
||||
|
||||
changeDebug(debug) {
|
||||
this.debug = debug;
|
||||
this.flushBuffer = debug ? this.flushBufferDebug : this.flushBufferBasic;
|
||||
this.fastFlush = debug ? this.fastFlushDebug : this.fastFlushBasic;
|
||||
}
|
||||
|
||||
setStream(stream) {
|
||||
this.stream = stream;
|
||||
}
|
||||
|
||||
growBuffer(len) {
|
||||
let newCapacity;
|
||||
if (len + this.pos < MEDIUM_BUFFER_SIZE) {
|
||||
newCapacity = MEDIUM_BUFFER_SIZE;
|
||||
} else if (len + this.pos < LARGE_BUFFER_SIZE) {
|
||||
newCapacity = LARGE_BUFFER_SIZE;
|
||||
} else if (len + this.pos < BIG_BUFFER_SIZE) {
|
||||
newCapacity = BIG_BUFFER_SIZE;
|
||||
} else if (this.bufContainDataAfterMark) {
|
||||
// special case, for bulk, when a bunch of parameter doesn't fit in 16Mb packet
|
||||
// this save bunch of encoded parameter, sending parameter until mark, then resending data after mark
|
||||
newCapacity = len + this.pos;
|
||||
} else {
|
||||
newCapacity = MAX_BUFFER_SIZE;
|
||||
}
|
||||
|
||||
if (len + this.pos > newCapacity) {
|
||||
if (this.markPos !== -1) {
|
||||
// buf is > 16M with mark.
|
||||
// flush until mark, reset pos at beginning
|
||||
this.flushBufferStopAtMark();
|
||||
|
||||
if (len + this.pos <= this.buf.length) {
|
||||
return;
|
||||
}
|
||||
return this.growBuffer(len);
|
||||
}
|
||||
}
|
||||
|
||||
let newBuf = Buffer.allocUnsafe(newCapacity);
|
||||
this.buf.copy(newBuf, 0, 0, this.pos);
|
||||
this.buf = newBuf;
|
||||
}
|
||||
|
||||
mark() {
|
||||
this.markPos = this.pos;
|
||||
}
|
||||
|
||||
isMarked() {
|
||||
return this.markPos !== -1;
|
||||
}
|
||||
|
||||
hasFlushed() {
|
||||
return this.cmd.sequenceNo !== -1;
|
||||
}
|
||||
|
||||
hasDataAfterMark() {
|
||||
return this.bufContainDataAfterMark;
|
||||
}
|
||||
|
||||
bufIsAfterMaxPacketLength() {
|
||||
return this.pos > this.maxPacketLength;
|
||||
}
|
||||
|
||||
/**
|
||||
* Reset mark flag and send bytes after mark flag.
|
||||
*
|
||||
* @return buffer after mark flag
|
||||
*/
|
||||
resetMark() {
|
||||
this.pos = this.markPos;
|
||||
this.markPos = -1;
|
||||
if (this.bufContainDataAfterMark) {
|
||||
const data = Buffer.allocUnsafe(this.pos - 4);
|
||||
this.buf.copy(data, 0, 4, this.pos);
|
||||
this.cmd.sequenceNo = -1;
|
||||
this.cmd.compressSequenceNo = -1;
|
||||
this.bufContainDataAfterMark = false;
|
||||
return data;
|
||||
}
|
||||
return null;
|
||||
}
|
||||
|
||||
/**
|
||||
* Send packet to socket.
|
||||
*
|
||||
* @throws IOException if socket error occur.
|
||||
*/
|
||||
flush() {
|
||||
this.flushBuffer(true, 0);
|
||||
this.buf = Buffer.allocUnsafe(SMALL_BUFFER_SIZE);
|
||||
this.cmd.sequenceNo = -1;
|
||||
this.cmd.compressSequenceNo = -1;
|
||||
this.cmdLength = 0;
|
||||
this.markPos = -1;
|
||||
}
|
||||
|
||||
flushPacket() {
|
||||
this.flushBuffer(false, 0);
|
||||
this.buf = Buffer.allocUnsafe(SMALL_BUFFER_SIZE);
|
||||
this.cmdLength = 0;
|
||||
this.markPos = -1;
|
||||
}
|
||||
|
||||
startPacket(cmd) {
|
||||
this.cmd = cmd;
|
||||
this.pos = 4;
|
||||
}
|
||||
|
||||
writeInt8(value) {
|
||||
if (this.pos + 1 >= this.buf.length) {
|
||||
let b = Buffer.allocUnsafe(1);
|
||||
b[0] = value;
|
||||
this.writeBuffer(b, 0, 1);
|
||||
return;
|
||||
}
|
||||
this.buf[this.pos++] = value;
|
||||
}
|
||||
|
||||
writeInt16(value) {
|
||||
if (this.pos + 2 >= this.buf.length) {
|
||||
let b = Buffer.allocUnsafe(2);
|
||||
b[0] = value;
|
||||
b[1] = value >>> 8;
|
||||
this.writeBuffer(b, 0, 2);
|
||||
return;
|
||||
}
|
||||
this.buf[this.pos] = value;
|
||||
this.buf[this.pos + 1] = value >> 8;
|
||||
this.pos += 2;
|
||||
}
|
||||
|
||||
writeInt16AtPos(initPos) {
|
||||
this.buf[initPos] = this.pos - initPos - 2;
|
||||
this.buf[initPos + 1] = (this.pos - initPos - 2) >> 8;
|
||||
}
|
||||
|
||||
writeInt24(value) {
|
||||
if (this.pos + 3 >= this.buf.length) {
|
||||
//not enough space remaining
|
||||
let arr = Buffer.allocUnsafe(3);
|
||||
arr[0] = value;
|
||||
arr[1] = value >> 8;
|
||||
arr[2] = value >> 16;
|
||||
this.writeBuffer(arr, 0, 3);
|
||||
return;
|
||||
}
|
||||
|
||||
this.buf[this.pos] = value;
|
||||
this.buf[this.pos + 1] = value >> 8;
|
||||
this.buf[this.pos + 2] = value >> 16;
|
||||
this.pos += 3;
|
||||
}
|
||||
|
||||
writeInt32(value) {
|
||||
if (this.pos + 4 >= this.buf.length) {
|
||||
//not enough space remaining
|
||||
let arr = Buffer.allocUnsafe(4);
|
||||
arr.writeInt32LE(value, 0);
|
||||
this.writeBuffer(arr, 0, 4);
|
||||
return;
|
||||
}
|
||||
|
||||
this.buf[this.pos] = value;
|
||||
this.buf[this.pos + 1] = value >> 8;
|
||||
this.buf[this.pos + 2] = value >> 16;
|
||||
this.buf[this.pos + 3] = value >> 24;
|
||||
this.pos += 4;
|
||||
}
|
||||
|
||||
writeBigInt(value) {
|
||||
if (this.pos + 8 >= this.buf.length) {
|
||||
//not enough space remaining
|
||||
let arr = Buffer.allocUnsafe(8);
|
||||
arr.writeBigInt64LE(value, 0);
|
||||
this.writeBuffer(arr, 0, 8);
|
||||
return;
|
||||
}
|
||||
this.buf.writeBigInt64LE(value, this.pos);
|
||||
this.pos += 8;
|
||||
}
|
||||
|
||||
writeDouble(value) {
|
||||
if (this.pos + 8 >= this.buf.length) {
|
||||
//not enough space remaining
|
||||
let arr = Buffer.allocUnsafe(8);
|
||||
arr.writeDoubleLE(value, 0);
|
||||
this.writeBuffer(arr, 0, 8);
|
||||
return;
|
||||
}
|
||||
this.buf.writeDoubleLE(value, this.pos);
|
||||
this.pos += 8;
|
||||
}
|
||||
|
||||
writeLengthCoded(len) {
|
||||
if (len < 0xfb) {
|
||||
this.writeInt8(len);
|
||||
return;
|
||||
}
|
||||
|
||||
if (len < 65536) {
|
||||
//max length is len < 0xffff
|
||||
this.writeInt8(0xfc);
|
||||
this.writeInt16(len);
|
||||
} else if (len < 16777216) {
|
||||
this.writeInt8(0xfd);
|
||||
this.writeInt24(len);
|
||||
} else {
|
||||
this.writeInt8(0xfe);
|
||||
this.writeBigInt(BigInt(len));
|
||||
}
|
||||
}
|
||||
|
||||
writeBuffer(arr, off, len) {
|
||||
if (len > this.buf.length - this.pos) {
|
||||
if (this.buf.length !== MAX_BUFFER_SIZE) {
|
||||
this.growBuffer(len);
|
||||
}
|
||||
|
||||
//max buffer size
|
||||
if (len > this.buf.length - this.pos) {
|
||||
if (this.markPos !== -1) {
|
||||
this.growBuffer(len);
|
||||
if (this.markPos !== -1) {
|
||||
this.flushBufferStopAtMark();
|
||||
}
|
||||
}
|
||||
|
||||
if (len > this.buf.length - this.pos) {
|
||||
//not enough space in buffer, will stream :
|
||||
// fill buffer and flush until all data are snd
|
||||
let remainingLen = len;
|
||||
|
||||
while (true) {
|
||||
//filling buffer
|
||||
let lenToFillBuffer = Math.min(MAX_BUFFER_SIZE - this.pos, remainingLen);
|
||||
arr.copy(this.buf, this.pos, off, off + lenToFillBuffer);
|
||||
remainingLen -= lenToFillBuffer;
|
||||
off += lenToFillBuffer;
|
||||
this.pos += lenToFillBuffer;
|
||||
|
||||
if (remainingLen === 0) return;
|
||||
this.flushBuffer(false, remainingLen);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// node.js copy is fast only when copying big buffer.
|
||||
// quick array copy is multiple time faster for small copy
|
||||
if (len > 50) {
|
||||
arr.copy(this.buf, this.pos, off, off + len);
|
||||
this.pos += len;
|
||||
} else {
|
||||
for (let i = 0; i < len; ) {
|
||||
this.buf[this.pos++] = arr[off + i++];
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Write ascii string to socket (no escaping)
|
||||
*
|
||||
* @param str string
|
||||
*/
|
||||
writeStringAscii(str) {
|
||||
let len = str.length;
|
||||
|
||||
//not enough space remaining
|
||||
if (len >= this.buf.length - this.pos) {
|
||||
let strBuf = Buffer.from(str, 'ascii');
|
||||
this.writeBuffer(strBuf, 0, strBuf.length);
|
||||
return;
|
||||
}
|
||||
|
||||
for (let off = 0; off < len; ) {
|
||||
this.buf[this.pos++] = str.charCodeAt(off++);
|
||||
}
|
||||
}
|
||||
|
||||
writeLengthEncodedBuffer(buffer) {
|
||||
const len = buffer.length;
|
||||
this.writeLengthCoded(len);
|
||||
this.writeBuffer(buffer, 0, len);
|
||||
}
|
||||
|
||||
writeUtf8StringEscapeQuote(str) {
|
||||
const charsLength = str.length;
|
||||
|
||||
//not enough space remaining
|
||||
if (charsLength * 3 + 2 >= this.buf.length - this.pos) {
|
||||
const arr = Buffer.from(str, 'utf8');
|
||||
this.writeInt8(QUOTE);
|
||||
this.writeBufferEscape(arr);
|
||||
this.writeInt8(QUOTE);
|
||||
return;
|
||||
}
|
||||
|
||||
//create UTF-8 byte array
|
||||
//since javascript char are internally using UTF-16 using surrogate's pattern, 4 bytes unicode characters will
|
||||
//represent 2 characters : example "\uD83C\uDFA4" = 🎤 unicode 8 "no microphones"
|
||||
//so max size is 3 * charLength
|
||||
//(escape characters are 1 byte encoded, so length might only be 2 when escaped)
|
||||
// + 2 for the quotes for text protocol
|
||||
let charsOffset = 0;
|
||||
let currChar;
|
||||
this.buf[this.pos++] = QUOTE;
|
||||
//quick loop if only ASCII chars for faster escape
|
||||
for (; charsOffset < charsLength && (currChar = str.charCodeAt(charsOffset)) < 0x80; charsOffset++) {
|
||||
if (currChar === SLASH || currChar === QUOTE || currChar === ZERO_BYTE || currChar === DBL_QUOTE) {
|
||||
this.buf[this.pos++] = SLASH;
|
||||
}
|
||||
this.buf[this.pos++] = currChar;
|
||||
}
|
||||
|
||||
//if quick loop not finished
|
||||
while (charsOffset < charsLength) {
|
||||
currChar = str.charCodeAt(charsOffset++);
|
||||
if (currChar < 0x80) {
|
||||
if (currChar === SLASH || currChar === QUOTE || currChar === ZERO_BYTE || currChar === DBL_QUOTE) {
|
||||
this.buf[this.pos++] = SLASH;
|
||||
}
|
||||
this.buf[this.pos++] = currChar;
|
||||
} else if (currChar < 0x800) {
|
||||
this.buf[this.pos++] = 0xc0 | (currChar >> 6);
|
||||
this.buf[this.pos++] = 0x80 | (currChar & 0x3f);
|
||||
} else if (currChar >= 0xd800 && currChar < 0xe000) {
|
||||
//reserved for surrogate - see https://en.wikipedia.org/wiki/UTF-16
|
||||
if (currChar < 0xdc00) {
|
||||
//is high surrogate
|
||||
if (charsOffset + 1 > charsLength) {
|
||||
this.buf[this.pos++] = 0x3f;
|
||||
} else {
|
||||
const nextChar = str.charCodeAt(charsOffset);
|
||||
if (nextChar >= 0xdc00 && nextChar < 0xe000) {
|
||||
//is low surrogate
|
||||
const surrogatePairs = (currChar << 10) + nextChar + (0x010000 - (0xd800 << 10) - 0xdc00);
|
||||
this.buf[this.pos++] = 0xf0 | (surrogatePairs >> 18);
|
||||
this.buf[this.pos++] = 0x80 | ((surrogatePairs >> 12) & 0x3f);
|
||||
this.buf[this.pos++] = 0x80 | ((surrogatePairs >> 6) & 0x3f);
|
||||
this.buf[this.pos++] = 0x80 | (surrogatePairs & 0x3f);
|
||||
charsOffset++;
|
||||
} else {
|
||||
//must have low surrogate
|
||||
this.buf[this.pos++] = 0x3f;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
//low surrogate without high surrogate before
|
||||
this.buf[this.pos++] = 0x3f;
|
||||
}
|
||||
} else {
|
||||
this.buf[this.pos++] = 0xe0 | (currChar >> 12);
|
||||
this.buf[this.pos++] = 0x80 | ((currChar >> 6) & 0x3f);
|
||||
this.buf[this.pos++] = 0x80 | (currChar & 0x3f);
|
||||
}
|
||||
}
|
||||
this.buf[this.pos++] = QUOTE;
|
||||
}
|
||||
|
||||
encodeIconvString(str) {
|
||||
return Iconv.encode(str, this.encoding);
|
||||
}
|
||||
|
||||
encodeNodeString(str) {
|
||||
return Buffer.from(str, this.encoding);
|
||||
}
|
||||
|
||||
writeDefaultBufferString(str) {
|
||||
//javascript use UCS-2 or UTF-16 string internal representation
|
||||
//that means that string to byte will be a maximum of * 3
|
||||
// (4 bytes utf-8 are represented on 2 UTF-16 characters)
|
||||
if (str.length * 3 < this.buf.length - this.pos) {
|
||||
this.pos += this.buf.write(str, this.pos, this.encoding);
|
||||
return;
|
||||
}
|
||||
|
||||
//checking real length
|
||||
let byteLength = Buffer.byteLength(str, this.encoding);
|
||||
if (byteLength > this.buf.length - this.pos) {
|
||||
if (this.buf.length < MAX_BUFFER_SIZE) {
|
||||
this.growBuffer(byteLength);
|
||||
}
|
||||
if (byteLength > this.buf.length - this.pos) {
|
||||
//not enough space in buffer, will stream :
|
||||
let strBuf = Buffer.from(str, this.encoding);
|
||||
this.writeBuffer(strBuf, 0, strBuf.length);
|
||||
return;
|
||||
}
|
||||
}
|
||||
this.pos += this.buf.write(str, this.pos, this.encoding);
|
||||
}
|
||||
|
||||
writeDefaultBufferLengthEncodedString(str) {
|
||||
//javascript use UCS-2 or UTF-16 string internal representation
|
||||
//that means that string to byte will be a maximum of * 3
|
||||
// (4 bytes utf-8 are represented on 2 UTF-16 characters)
|
||||
//checking real length
|
||||
let byteLength = Buffer.byteLength(str, this.encoding);
|
||||
this.writeLengthCoded(byteLength);
|
||||
|
||||
if (byteLength > this.buf.length - this.pos) {
|
||||
if (this.buf.length < MAX_BUFFER_SIZE) {
|
||||
this.growBuffer(byteLength);
|
||||
}
|
||||
if (byteLength > this.buf.length - this.pos) {
|
||||
//not enough space in buffer, will stream :
|
||||
let strBuf = Buffer.from(str, this.encoding);
|
||||
this.writeBuffer(strBuf, 0, strBuf.length);
|
||||
return;
|
||||
}
|
||||
}
|
||||
this.pos += this.buf.write(str, this.pos, this.encoding);
|
||||
}
|
||||
|
||||
writeDefaultIconvString(str) {
|
||||
let buf = Iconv.encode(str, this.encoding);
|
||||
this.writeBuffer(buf, 0, buf.length);
|
||||
}
|
||||
|
||||
writeDefaultIconvLengthEncodedString(str) {
|
||||
let buf = Iconv.encode(str, this.encoding);
|
||||
this.writeLengthCoded(buf.length);
|
||||
this.writeBuffer(buf, 0, buf.length);
|
||||
}
|
||||
|
||||
/**
|
||||
* Parameters need to be properly escaped :
|
||||
* following characters are to be escaped by "\" :
|
||||
* - \0
|
||||
* - \\
|
||||
* - \'
|
||||
* - \"
|
||||
* - \032
|
||||
* regex split part of string writing part, and escaping special char.
|
||||
* Those chars are <= 7f meaning that this will work even with multibyte encoding
|
||||
*
|
||||
* @param str string to escape.
|
||||
*/
|
||||
writeDefaultStringEscapeQuote(str) {
|
||||
this.writeInt8(QUOTE);
|
||||
let match;
|
||||
let lastIndex = 0;
|
||||
while ((match = CHARS_GLOBAL_REGEXP.exec(str)) !== null) {
|
||||
this.writeString(str.slice(lastIndex, match.index));
|
||||
this.writeInt8(SLASH);
|
||||
this.writeInt8(match[0].charCodeAt(0));
|
||||
lastIndex = CHARS_GLOBAL_REGEXP.lastIndex;
|
||||
}
|
||||
|
||||
if (lastIndex === 0) {
|
||||
// Nothing was escaped
|
||||
this.writeString(str);
|
||||
this.writeInt8(QUOTE);
|
||||
return;
|
||||
}
|
||||
|
||||
if (lastIndex < str.length) {
|
||||
this.writeString(str.slice(lastIndex));
|
||||
}
|
||||
this.writeInt8(QUOTE);
|
||||
}
|
||||
|
||||
writeBinaryDate(date) {
|
||||
const year = date.getFullYear();
|
||||
const mon = date.getMonth() + 1;
|
||||
const day = date.getDate();
|
||||
const hour = date.getHours();
|
||||
const min = date.getMinutes();
|
||||
const sec = date.getSeconds();
|
||||
const ms = date.getMilliseconds();
|
||||
|
||||
let len = ms === 0 ? 7 : 11;
|
||||
//not enough space remaining
|
||||
if (len + 1 > this.buf.length - this.pos) {
|
||||
let tmpBuf = Buffer.allocUnsafe(len + 1);
|
||||
|
||||
tmpBuf[0] = len;
|
||||
tmpBuf[1] = year;
|
||||
tmpBuf[2] = year >>> 8;
|
||||
tmpBuf[3] = mon;
|
||||
tmpBuf[4] = day;
|
||||
tmpBuf[5] = hour;
|
||||
tmpBuf[6] = min;
|
||||
tmpBuf[7] = sec;
|
||||
if (ms !== 0) {
|
||||
const micro = ms * 1000;
|
||||
tmpBuf[8] = micro;
|
||||
tmpBuf[9] = micro >>> 8;
|
||||
tmpBuf[10] = micro >>> 16;
|
||||
tmpBuf[11] = micro >>> 24;
|
||||
}
|
||||
|
||||
this.writeBuffer(tmpBuf, 0, len + 1);
|
||||
return;
|
||||
}
|
||||
|
||||
this.buf[this.pos] = len;
|
||||
this.buf[this.pos + 1] = year;
|
||||
this.buf[this.pos + 2] = year >>> 8;
|
||||
this.buf[this.pos + 3] = mon;
|
||||
this.buf[this.pos + 4] = day;
|
||||
this.buf[this.pos + 5] = hour;
|
||||
this.buf[this.pos + 6] = min;
|
||||
this.buf[this.pos + 7] = sec;
|
||||
|
||||
if (ms !== 0) {
|
||||
const micro = ms * 1000;
|
||||
this.buf[this.pos + 8] = micro;
|
||||
this.buf[this.pos + 9] = micro >>> 8;
|
||||
this.buf[this.pos + 10] = micro >>> 16;
|
||||
this.buf[this.pos + 11] = micro >>> 24;
|
||||
}
|
||||
this.pos += len + 1;
|
||||
}
|
||||
|
||||
writeBufferEscape(val) {
|
||||
let valLen = val.length;
|
||||
if (valLen * 2 > this.buf.length - this.pos) {
|
||||
//makes buffer bigger (up to 16M)
|
||||
if (this.buf.length !== MAX_BUFFER_SIZE) this.growBuffer(valLen * 2);
|
||||
|
||||
//data may still be bigger than buffer.
|
||||
//must flush buffer when full (and reset position to 4)
|
||||
if (valLen * 2 > this.buf.length - this.pos) {
|
||||
//not enough space in buffer, will fill buffer
|
||||
for (let i = 0; i < valLen; i++) {
|
||||
switch (val[i]) {
|
||||
case QUOTE:
|
||||
case SLASH:
|
||||
case DBL_QUOTE:
|
||||
case ZERO_BYTE:
|
||||
if (this.pos >= this.buf.length) this.flushBuffer(false, (valLen - i) * 2);
|
||||
this.buf[this.pos++] = SLASH; //add escape slash
|
||||
}
|
||||
if (this.pos >= this.buf.length) this.flushBuffer(false, (valLen - i) * 2);
|
||||
this.buf[this.pos++] = val[i];
|
||||
}
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
//sure to have enough place to use buffer directly
|
||||
for (let i = 0; i < valLen; i++) {
|
||||
switch (val[i]) {
|
||||
case QUOTE:
|
||||
case SLASH:
|
||||
case DBL_QUOTE:
|
||||
case ZERO_BYTE:
|
||||
this.buf[this.pos++] = SLASH; //add escape slash
|
||||
}
|
||||
this.buf[this.pos++] = val[i];
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Count query size. If query size is greater than max_allowed_packet and nothing has been already
|
||||
* send, throw an exception to avoid having the connection closed.
|
||||
*
|
||||
* @param length additional length to query size
|
||||
* @param info current connection information
|
||||
* @throws Error if query has not to be sent.
|
||||
*/
|
||||
checkMaxAllowedLength(length, info) {
|
||||
if (this.opts.maxAllowedPacket && this.cmdLength + length >= this.maxAllowedPacket) {
|
||||
// launch exception only if no packet has been sent.
|
||||
return Errors.createError(
|
||||
`query size (${this.cmdLength + length}) is >= to max_allowed_packet (${this.maxAllowedPacket})`,
|
||||
Errors.ER_MAX_ALLOWED_PACKET,
|
||||
info
|
||||
);
|
||||
}
|
||||
return null;
|
||||
}
|
||||
|
||||
/**
|
||||
* Indicate if buffer contain any data.
|
||||
* @returns {boolean}
|
||||
*/
|
||||
isEmpty() {
|
||||
return this.pos <= 4;
|
||||
}
|
||||
|
||||
/**
|
||||
* Flush the internal buffer.
|
||||
*/
|
||||
flushBufferDebug(commandEnd, remainingLen) {
|
||||
if (this.pos > 4) {
|
||||
this.buf[0] = this.pos - 4;
|
||||
this.buf[1] = (this.pos - 4) >>> 8;
|
||||
this.buf[2] = (this.pos - 4) >>> 16;
|
||||
this.buf[3] = ++this.cmd.sequenceNo;
|
||||
this.stream.writeBuf(this.buf.subarray(0, this.pos), this.cmd);
|
||||
this.stream.flush(true, this.cmd);
|
||||
this.cmdLength += this.pos - 4;
|
||||
|
||||
this.opts.logger.network(
|
||||
`==> conn:${this.info.threadId ? this.info.threadId : -1} ${
|
||||
this.cmd.constructor.name + '(0,' + this.pos + ')'
|
||||
}\n${Utils.log(this.opts, this.buf, 0, this.pos)}`
|
||||
);
|
||||
|
||||
if (commandEnd && this.pos === MAX_BUFFER_SIZE) {
|
||||
//if last packet fill the max size, must send an empty com to indicate that command end.
|
||||
this.writeEmptyPacket();
|
||||
}
|
||||
this.buf = this.createBufferWithMinSize(remainingLen);
|
||||
this.pos = 4;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Flush to last mark.
|
||||
*/
|
||||
flushBufferStopAtMark() {
|
||||
const end = this.pos;
|
||||
this.pos = this.markPos;
|
||||
const tmpBuf = Buffer.allocUnsafe(Math.max(SMALL_BUFFER_SIZE, end + 4 - this.pos));
|
||||
this.buf.copy(tmpBuf, 4, this.markPos, end);
|
||||
this.flushBuffer(true, end - this.pos);
|
||||
this.cmdLength = 0;
|
||||
this.buf = tmpBuf;
|
||||
this.pos = 4 + end - this.markPos;
|
||||
this.markPos = -1;
|
||||
this.bufContainDataAfterMark = true;
|
||||
}
|
||||
|
||||
flushBufferBasic(commandEnd, remainingLen) {
|
||||
this.buf[0] = this.pos - 4;
|
||||
this.buf[1] = (this.pos - 4) >>> 8;
|
||||
this.buf[2] = (this.pos - 4) >>> 16;
|
||||
this.buf[3] = ++this.cmd.sequenceNo;
|
||||
this.stream.writeBuf(this.buf.subarray(0, this.pos), this.cmd);
|
||||
this.stream.flush(true, this.cmd);
|
||||
this.cmdLength += this.pos - 4;
|
||||
if (commandEnd && this.pos === MAX_BUFFER_SIZE) {
|
||||
//if last packet fill the max size, must send an empty com to indicate that command end.
|
||||
this.writeEmptyPacket();
|
||||
}
|
||||
this.buf = this.createBufferWithMinSize(remainingLen);
|
||||
this.pos = 4;
|
||||
}
|
||||
|
||||
createBufferWithMinSize(remainingLen) {
|
||||
let newCapacity;
|
||||
if (remainingLen + 4 < SMALL_BUFFER_SIZE) {
|
||||
newCapacity = SMALL_BUFFER_SIZE;
|
||||
} else if (remainingLen + 4 < MEDIUM_BUFFER_SIZE) {
|
||||
newCapacity = MEDIUM_BUFFER_SIZE;
|
||||
} else if (remainingLen + 4 < LARGE_BUFFER_SIZE) {
|
||||
newCapacity = LARGE_BUFFER_SIZE;
|
||||
} else if (remainingLen + 4 < BIG_BUFFER_SIZE) {
|
||||
newCapacity = BIG_BUFFER_SIZE;
|
||||
} else {
|
||||
newCapacity = MAX_BUFFER_SIZE;
|
||||
}
|
||||
return Buffer.allocUnsafe(newCapacity);
|
||||
}
|
||||
|
||||
fastFlushDebug(cmd, packet) {
|
||||
this.stream.writeBuf(packet, cmd);
|
||||
this.stream.flush(true, cmd);
|
||||
this.cmdLength += packet.length;
|
||||
|
||||
this.opts.logger.network(
|
||||
`==> conn:${this.info.threadId ? this.info.threadId : -1} ${
|
||||
cmd.constructor.name + '(0,' + packet.length + ')'
|
||||
}\n${Utils.log(this.opts, packet, 0, packet.length)}`
|
||||
);
|
||||
this.cmdLength = 0;
|
||||
this.markPos = -1;
|
||||
}
|
||||
|
||||
fastFlushBasic(cmd, packet) {
|
||||
this.stream.writeBuf(packet, cmd);
|
||||
this.stream.flush(true, cmd);
|
||||
this.cmdLength = 0;
|
||||
this.markPos = -1;
|
||||
}
|
||||
|
||||
writeEmptyPacket() {
|
||||
const emptyBuf = Buffer.from([0x00, 0x00, 0x00, ++this.cmd.sequenceNo]);
|
||||
|
||||
if (this.debug) {
|
||||
this.opts.logger.network(
|
||||
`==> conn:${this.info.threadId ? this.info.threadId : -1} ${this.cmd.constructor.name}(0,4)\n${Utils.log(
|
||||
this.opts,
|
||||
emptyBuf,
|
||||
0,
|
||||
4
|
||||
)}`
|
||||
);
|
||||
}
|
||||
|
||||
this.stream.writeBuf(emptyBuf, this.cmd);
|
||||
this.stream.flush(true, this.cmd);
|
||||
this.cmdLength = 0;
|
||||
}
|
||||
}
|
||||
|
||||
module.exports = PacketOutputStream;
|
||||
Reference in New Issue
Block a user