mirror of
https://github.com/gnh1201/welsonjs.git
synced 2024-10-04 07:01:53 +00:00
559 lines
16 KiB
JavaScript
559 lines
16 KiB
JavaScript
// pipe-ipc.js
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// Pipe based IPC implementation for WelsonJS framework
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// Namhyeon Go (Catswords Research) <abuse@catswords.net>
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// https://github.com/gnh1201/welsonjs
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var STD = require("lib/std");
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// https://learn.microsoft.com/en-us/office/vba/language/reference/user-interface-help/opentextfile-method
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var ForReading = 1;
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var ForWriting = 2;
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var ForAppending = 8;
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var TristateUseDefault = -2;
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var TristateTrue = -1;
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var TristateFalse = 0;
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// https://learn.microsoft.com/en-us/office/client-developer/access/desktop-database-reference/streamtypeenum
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var adTypeBinary = 1;
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var adTypeText = 2;
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// https://learn.microsoft.com/ko-kr/sql/ado/reference/ado-api/saveoptionsenum?view=sql-server-ver16
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var adSaveCreateNotExist = 1;
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var adSaveCreateOverWrite = 2;
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// https://learn.microsoft.com/en-us/sql/ado/reference/ado-api/connectmodeenum?view=sql-server-ver16
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var adModeRead = 1;
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var adModeReadWrite = 3;
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var adModeRecursive = 0x400000;
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var adModeShareDenyNone = 16;
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var adModeShareDenyRead = 4;
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var adModeShareDenyWrite = 8;
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var adModeShareExclusive = 12;
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var adModeUnknown = 0;
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var adModeWrite = 2;
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// https://learn.microsoft.com/en-us/previous-versions/exchange-server/exchange-10/ms527267(v=exchg.10)
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// https://learn.microsoft.com/en-us/previous-versions/exchange-server/exchange-10/ms526296(v=exchg.10)
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var CdoCharset = {};
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CdoCharset.CdoBIG5 = "big5";
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CdoCharset.CdoEUC_JP = "euc-jp";
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CdoCharset.CdoEUC_KR = "euc-kr";
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CdoCharset.CdoGB2312 = "gb2312";
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CdoCharset.CdoISO_2022_JP = "iso-2022-jp";
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CdoCharset.CdoISO_2022_KR = "iso-2022-kr";
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CdoCharset.CdoISO_8859_1 = "iso-8859-1";
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CdoCharset.CdoISO_8859_2 = "iso-8859-2";
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CdoCharset.CdoISO_8859_3 = "iso-8859-3";
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CdoCharset.CdoISO_8859_4 = "iso-8859-4";
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CdoCharset.CdoISO_8859_5 = "iso-8859-5";
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CdoCharset.CdoISO_8859_6 = "iso-8859-6";
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CdoCharset.CdoISO_8859_7 = "iso-8859-7";
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CdoCharset.CdoISO_8859_8 = "iso-8859-8";
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CdoCharset.CdoISO_8859_9 = "iso-8859-9";
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CdoCharset.cdoKOI8_R = "koi8-r";
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CdoCharset.cdoShift_JIS = "shift-jis";
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CdoCharset.CdoUS_ASCII = "us-ascii";
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CdoCharset.CdoUTF_7 = "utf-7";
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CdoCharset.CdoUTF_8 = "utf-8";
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var randomize = Math.random;
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function UUIDv4() {}
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UUIDv4.create = function() {
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return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
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var r = randomize() * 16 | 0, v = c == 'x' ? r : (r & 0x3 | 0x8);
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return v.toString(16);
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});
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};
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function CRC32() {
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this.value = 0;
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this.fromString = function(s) {
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var crc = 0 ^ (-1);
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for (var i = 0; i < s.length; i++ ) {
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crc = (crc >>> 8) ^ CRC32.table[(crc ^ s.charCodeAt(i)) & 0xFF];
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}
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this.value = ((crc ^ (-1)) >>> 0);
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};
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this.toString = function() {
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return this.value.toString(16).padStart(8, '0');
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};
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}
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CRC32.table = [];
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(function() {
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for (var n = 0; n < 256; n++) {
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c = n;
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for(var k =0; k < 8; k++){
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c = ((c&1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));
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}
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CRC32.table[n] = c;
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}
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})();
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function makeProbabilityBit(p) {
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return !( p > 0.0 ? ( (randomize() / p) > 1.0 ) : true) ? 1 : 0;
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}
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function makeInterface(i) {
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return CreateObject(["Scripting.FileSystemObject", "ADODB.Stream"][i]);
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}
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function openTextFile(filename, iomode) {
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return makeInterface(0).OpenTextFile(filename, iomode, true, TristateTrue);
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}
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function checkFileExists(filename) {
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return makeInterface(0).FileExists(filename);;
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}
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function deleteFile(filename) {
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if (checkFileExists(filename)) makeInterface(0).DeleteFile(filename);
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}
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function getFileSize(filename) {
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try {
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return makeInterface(0).GetFile(filename).Size;
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} catch (e) {
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return -1;
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}
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}
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function Converter() {
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this.value = null;
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this.from = function(value) {
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this.value = value;
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};
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this.getBinaryFromText = function() {
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var stream = makeInterface(1);
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stream.Type = adTypeText;
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stream.CharSet = CdoCharset.CdoUTF_8;
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stream.Open();
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stream.WriteText(this.value);
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stream.Position = 0;
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stream.Type = adTypeBinary;
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return stream.Read();
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};
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this.getTextFromBinary = function() {
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var stream = makeInterface(1);
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stream.Type = adTypeBinary;
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stream.Open();
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stream.Write(this.value);
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stream.Position = 0;
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stream.Type = adTypeText;
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stream.CharSet = CdoCharset.CdoUTF_8;
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return stream.ReadText();
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};
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this.repositionObject = function(stream, position) {
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position = (position !== "number" ? 0 : position);
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var _stream = makeInterface(1);
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_stream.Type = adTypeBinary;
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_stream.Mode = adModeReadWrite;
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_stream.Open();
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stream.Position = position;
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stream.CopyTo(_stream);
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stream.Flush();
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stream.Close();
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return _stream;
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};
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}
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function PipeIPC() {
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this.path = "data\\.pipe_:pipename";
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this.delimiter = "\r\n";
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this.reader = null;
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this.writer = null;
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this.recorder = null;
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this.savefile = null;
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this.tmpfile = null;
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this.charset = CdoCharset.CdoUTF_8;
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this.lastReadTime = -1;
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this.lastWriteTime = -1;
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this.maxSentences = 0;
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this.recorder_iomode = ForAppending;
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this.getCurrentTime = function() {
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return new Date().getTime();
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};
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this.setCharset = function(charset) {
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charset = charset.toLowerCase();
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if (Object.values(CdoCharset).indexOf(charset) < 0) {
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console.warn(charset.toUpperCase() + " may not be an encoding supported by the system.");
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}
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this.charset = charset;
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};
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this.setDelimiter = function(delimiter) {
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this.delimiter = delimiter;
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};
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this.setMaxSentences = function(maxSentences) {
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this.maxSentences = maxSentences;
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};
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this.waitForRetry = function() {
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var t = makeProbabilityBit(0.5);
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if (t > 0) sleep(t);
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};
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this.connect = function(pipename, callback) {
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if (pipename == "volatile") {
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pipename = UUIDv4.create().substring(0, 8);
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}
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this.path = this.path.replace(":pipename", pipename);
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//this.openWriter();
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//this.openReader();
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//console.info("Opened pipe:", pipename);
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if (typeof callback === "function") {
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callback(this, this.reader, this.writer);
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}
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return this;
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};
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this.openWriter = function(iomode) {
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while (this.writer == null) {
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try {
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this.writer = openTextFile(this.path, iomode);
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} catch (e) {}
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}
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};
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this.closeWriter = function() {
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if (this.writer != null) {
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this.writer.Close();
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this.writer = null;
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}
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};
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this.openReader = function() {
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while (this.reader == null) {
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try {
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this.reader = openTextFile(this.path, ForReading);
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} catch (e) {}
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}
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};
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this.closeReader = function() {
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if (this.reader != null) {
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this.reader.Close();
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this.reader = null;
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}
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};
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this.startRecorder = function(filename, iomode) {
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iomode = (iomode !== "undefined" ? ForAppending : iomode); // default: ForAppending
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this.savefile = filename;
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this.tmpfile = this.savefile + ".tmp";
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this.recorder_iomode = iomode;
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// read a text from save file
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if (this.recorder_iomode == ForAppending) {
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var isExistsSaveFile = checkFileExists(this.savefile);
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var isExistsTmpFile = checkFileExists(this.tmpfile);
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while (isExistsSaveFile && !isExistsTmpFile) {
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try {
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var fso = openTextFile(this.tmpfile, ForWriting);
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fso.Write(this.readTextFromFile(this.savefile));
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fso.Close();
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isExistsTmpFile = checkFileExists(this.tmpfile);
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} catch (e) {
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isExistsTmpFile = false;
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this.waitForRetry();
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}
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}
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}
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// open a recorder
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this.openRecorder(iomode);
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};
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this.stopRecorder = function() {
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this.savefile = null;
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this.tmpfile = null;
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};
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this.openRecorder = function(iomode) {
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while (this.recorder == null) {
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try {
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this.recorder = openTextFile(this.tmpfile, iomode);
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} catch (e) {}
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}
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};
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this.closeRecorder = function() {
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if (this.recorder != null) {
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this.recorder.Close();
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this.recorder = null;
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}
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};
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this._write = function(message) {
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this.writer.Write(message);
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};
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this.write = function(message, iomode) {
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iomode = (iomode !== "undefined" ? ForAppending : iomode); // default: ForAppending
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var isWritten = false;
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while (!isWritten) {
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try {
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this.flush();
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this.openWriter(iomode);
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this._write(message);
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this.closeWriter();
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isWritten = true;
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this.lastWriteTime = this.getCurrentTime();
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} catch (e) {
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//console.log(e.message);
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this.closeWriter();
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isWritten = false;
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this.waitForRetry();
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}
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}
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// record the last message
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if (isWritten && this.savefile != null) {
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this.record(message);
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}
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return isWritten;
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};
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this._record = function(message) {
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if (this.recorder_iomode == ForAppending) {
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this.recorder.Write(message);
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} else if (this.recorder_iomode == ForWriting) {
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this.recorder.Write(message + this.delimiter + this.readTextFromFile(this.savefile));
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}
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};
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this.record = function(message) {
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var isRecorded = false;
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while (!isRecorded) {
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try {
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this.openRecorder(this.recorder_iomode);
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this._record(message);
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this.closeRecorder();
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this.commit(this.savefile);
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isRecorded = true;
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this.closeRecorder();
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} catch (e) {
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//console.log(e.message);
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this.closeRecorder();
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isRecorded = false;
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this.waitForRetry();
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}
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}
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return isRecorded;
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};
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this.commit = function(dst) {
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var src = this.tmpfile;
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var charset = this.charset;
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var isCommited = false;
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while (!isCommited) {
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try {
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// Open a temporary file
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var fso = openTextFile(src, ForReading);
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var text = this._read(fso);
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fso.Close(); // close the file immediately
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var sentences = text.split(this.delimiter);
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var newSentences = [], str = '';
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// if enabled "maxSentences" feature
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if (text.length > 0 && this.maxSentences > 0) {
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while (sentences.length > 0 && newSentences.length < this.maxSentences) {
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newSentences.push(sentences.pop());
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}
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str = newSentences.reverse().join(this.delimiter);
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// Write a new temporary file
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var done = false;
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while (!done) {
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try {
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var _fso = openTextFile(src, ForWriting);
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_fso.Write(str);
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_fso.Close();
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done = true;
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} catch (e) {
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done = false;
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this.waitForRetry();
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}
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}
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} else {
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str = text;
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}
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// Convert UTF-16 BOM to a character set
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var stream = makeInterface(1);
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stream.Type = adTypeText;
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stream.Charset = charset;
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stream.Open();
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stream.WriteText(str);
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stream = (new Converter()).repositionObject(stream, 3);
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stream.SaveToFile(dst, adSaveCreateOverWrite);
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stream.Close();
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// Set a result
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isCommited = true;
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} catch (e) {
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//console.log(e.message);
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isCommited = false;
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this.waitForRetry();
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}
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}
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return isCommited;
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};
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this.flush = function() {
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var isFlushed = false;
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while (!isFlushed) {
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try {
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this.openWriter(ForWriting);
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this._write('');
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this.closeWriter();
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isFlushed = true;
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} catch (e) {
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this.closeWriter();
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isFlushed = false;
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this.waitForRetry();
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}
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}
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return isFlushed;
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};
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// Fixed bug: broken GUI sample #86, Reported by @eogloblin, in 2023-10-26
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// https://gist.github.com/antic183/619f42b559b78028d1fe9e7ae8a1352d
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this._read = function(fh) {
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try {
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return (function(s) {
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return (s.length > 1 && s.charCodeAt(0) === 0xFEFF) ? s.substring(1) : s;
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})(fh.ReadAll());
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} catch (e) {
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//console.log(e.message);
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return '';
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}
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};
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this.read = function() {
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var isReadCompleted = false;
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var text = '';
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while (!isReadCompleted) {
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try {
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this.openReader();
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text += this._read(this.reader);
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isReadCompleted = true;
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this.lastReadTime = this.getCurrentTime();
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this.closeReader();
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} catch (e) {
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this.closeReader();
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this.waitForRetry();
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}
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}
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return text;
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};
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this.close = function() {
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this.closeWriter();
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this.closeReader();
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this.closeRecorder();
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};
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this.destroy = function() {
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this.close();
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deleteFile(this.path);
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};
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this.readTextFromFile = function(filename, charset) {
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charset = (typeof charset !== "undefined" ? charset : this.charset);
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var text = '';
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var isFileExists = checkFileExists(filename);
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if (isFileExists) {
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var isReadCompleted = false;
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while (!isReadCompleted) {
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try {
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var ado = makeInterface(1);
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ado.Charset = charset;
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ado.Open();
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ado.LoadFromFile(filename);
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text += ado.ReadText();
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ado.Close();
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isReadCompleted = true;
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} catch (e) {
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//console.log(e.message);
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isReadCompleted = false;
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}
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}
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} else {
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console.warn("File", filename, "not exists");
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}
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return text;
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};
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this.loadFromFile = function(filename, charset) {
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charset = (typeof charset !== "undefined" ? charset : this.charset);
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var text = this.readTextFromFile(filename, charset);
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this.write(text, ForWriting);
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};
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this.reload = function(charset) {
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charset = (typeof charset !== "undefined" ? charset : this.charset);
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this.loadFromFile(this.path, charset);
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};
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}
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exports.create = function() {
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return new PipeIPC();
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};
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exports.connect = function(path, callback) {
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var pipe = exports.create();
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return pipe.connect(path, callback);
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};
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exports.Converter = Converter;
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exports.UUIDv4 = UUIDv4;
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exports.CRC32 = CRC32;
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exports.ForReading = ForReading;
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exports.ForWriting = ForWriting;
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exports.ForAppending = ForAppending;
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exports.CdoCharset = CdoCharset;
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exports.CdoUTF_8 = CdoCharset.CdoUTF_8;
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exports.CdoUS_ASCII = CdoCharset.CdoUS_ASCII;
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exports.CdoEUC_KR = CdoCharset.CdoEUC_KR;
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exports.CdoEUC_JP = CdoCharset.CdoEUC_JP;
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exports.adTypeBinary = adTypeBinary;
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exports.adTypeText = adTypeText;
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exports.adSaveCreateNotExist = adSaveCreateNotExist;
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exports.adSaveCreateOverWrite = adSaveCreateOverWrite;
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exports.adModeReadWrite = adModeReadWrite;
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exports.VERSIONINFO = "PIPE-based IPC Module (pipe-ipc.js) version 0.1.23";
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exports.AUTHOR = "abuse@catswords.net";
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exports.global = global;
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exports.require = require;
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