tedious
Version:
A TDS driver, for connecting to MS SQLServer databases.
97 lines (94 loc) • 11.1 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _bl = _interopRequireDefault(require("bl"));
var _stream = require("stream");
var _message = _interopRequireDefault(require("./message"));
var _packet = require("./packet");
var _errors = require("./errors");
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
/**
IncomingMessageStream
Transform received TDS data into individual IncomingMessage streams.
*/
class IncomingMessageStream extends _stream.Transform {
constructor(debug) {
super({
readableObjectMode: true
});
this.debug = debug;
this.currentMessage = undefined;
this.bl = new _bl.default();
}
pause() {
super.pause();
if (this.currentMessage) {
this.currentMessage.pause();
}
return this;
}
resume() {
super.resume();
if (this.currentMessage) {
this.currentMessage.resume();
}
return this;
}
processBufferedData(callback) {
// The packet header is always 8 bytes of length.
while (this.bl.length >= _packet.HEADER_LENGTH) {
// Get the full packet length
const length = this.bl.readUInt16BE(2);
if (length < _packet.HEADER_LENGTH) {
return callback(new _errors.ConnectionError('Unable to process incoming packet'));
}
if (this.bl.length >= length) {
const data = this.bl.slice(0, length);
this.bl.consume(length);
// TODO: Get rid of creating `Packet` instances here.
const packet = new _packet.Packet(data);
this.debug.packet('Received', packet);
this.debug.data(packet);
let message = this.currentMessage;
if (message === undefined) {
this.currentMessage = message = new _message.default({
type: packet.type(),
resetConnection: false
});
this.push(message);
}
if (packet.isLast()) {
// Wait until the current message was fully processed before we
// continue processing any remaining messages.
message.once('end', () => {
this.currentMessage = undefined;
this.processBufferedData(callback);
});
message.end(packet.data());
return;
} else if (!message.write(packet.data())) {
// If too much data is buffering up in the
// current message, wait for it to drain.
message.once('drain', () => {
this.processBufferedData(callback);
});
return;
}
} else {
break;
}
}
// Not enough data to read the next packet. Stop here and wait for
// the next call to `_transform`.
callback();
}
_transform(chunk, _encoding, callback) {
this.bl.append(chunk);
this.processBufferedData(callback);
}
}
var _default = exports.default = IncomingMessageStream;
module.exports = IncomingMessageStream;
//# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"names":["_bl","_interopRequireDefault","require","_stream","_message","_packet","_errors","obj","__esModule","default","IncomingMessageStream","Transform","constructor","debug","readableObjectMode","currentMessage","undefined","bl","BufferList","pause","resume","processBufferedData","callback","length","HEADER_LENGTH","readUInt16BE","ConnectionError","data","slice","consume","packet","Packet","message","Message","type","resetConnection","push","isLast","once","end","write","_transform","chunk","_encoding","append","_default","exports","module"],"sources":["../src/incoming-message-stream.ts"],"sourcesContent":["import BufferList from 'bl';\nimport { Transform } from 'stream';\n\nimport Debug from './debug';\nimport Message from './message';\nimport { Packet, HEADER_LENGTH } from './packet';\nimport { ConnectionError } from './errors';\n\n/**\n  IncomingMessageStream\n  Transform received TDS data into individual IncomingMessage streams.\n*/\nclass IncomingMessageStream extends Transform {\n  declare debug: Debug;\n  declare bl: any;\n  declare currentMessage: Message | undefined;\n\n  constructor(debug: Debug) {\n    super({ readableObjectMode: true });\n\n    this.debug = debug;\n\n    this.currentMessage = undefined;\n    this.bl = new BufferList();\n  }\n\n  pause() {\n    super.pause();\n\n    if (this.currentMessage) {\n      this.currentMessage.pause();\n    }\n\n    return this;\n  }\n\n  resume() {\n    super.resume();\n\n    if (this.currentMessage) {\n      this.currentMessage.resume();\n    }\n\n    return this;\n  }\n\n  processBufferedData(callback: (err?: ConnectionError) => void) {\n    // The packet header is always 8 bytes of length.\n    while (this.bl.length >= HEADER_LENGTH) {\n      // Get the full packet length\n      const length = this.bl.readUInt16BE(2);\n      if (length < HEADER_LENGTH) {\n        return callback(new ConnectionError('Unable to process incoming packet'));\n      }\n\n      if (this.bl.length >= length) {\n        const data = this.bl.slice(0, length);\n        this.bl.consume(length);\n\n        // TODO: Get rid of creating `Packet` instances here.\n        const packet = new Packet(data);\n        this.debug.packet('Received', packet);\n        this.debug.data(packet);\n\n        let message = this.currentMessage;\n        if (message === undefined) {\n          this.currentMessage = message = new Message({ type: packet.type(), resetConnection: false });\n          this.push(message);\n        }\n\n        if (packet.isLast()) {\n          // Wait until the current message was fully processed before we\n          // continue processing any remaining messages.\n          message.once('end', () => {\n            this.currentMessage = undefined;\n            this.processBufferedData(callback);\n          });\n          message.end(packet.data());\n          return;\n        } else if (!message.write(packet.data())) {\n          // If too much data is buffering up in the\n          // current message, wait for it to drain.\n          message.once('drain', () => {\n            this.processBufferedData(callback);\n          });\n          return;\n        }\n      } else {\n        break;\n      }\n    }\n\n    // Not enough data to read the next packet. Stop here and wait for\n    // the next call to `_transform`.\n    callback();\n  }\n\n  _transform(chunk: Buffer, _encoding: string, callback: () => void) {\n    this.bl.append(chunk);\n    this.processBufferedData(callback);\n  }\n}\n\nexport default IncomingMessageStream;\nmodule.exports = IncomingMessageStream;\n"],"mappings":";;;;;;AAAA,IAAAA,GAAA,GAAAC,sBAAA,CAAAC,OAAA;AACA,IAAAC,OAAA,GAAAD,OAAA;AAGA,IAAAE,QAAA,GAAAH,sBAAA,CAAAC,OAAA;AACA,IAAAG,OAAA,GAAAH,OAAA;AACA,IAAAI,OAAA,GAAAJ,OAAA;AAA2C,SAAAD,uBAAAM,GAAA,WAAAA,GAAA,IAAAA,GAAA,CAAAC,UAAA,GAAAD,GAAA,KAAAE,OAAA,EAAAF,GAAA;AAE3C;AACA;AACA;AACA;AACA,MAAMG,qBAAqB,SAASC,iBAAS,CAAC;EAK5CC,WAAWA,CAACC,KAAY,EAAE;IACxB,KAAK,CAAC;MAAEC,kBAAkB,EAAE;IAAK,CAAC,CAAC;IAEnC,IAAI,CAACD,KAAK,GAAGA,KAAK;IAElB,IAAI,CAACE,cAAc,GAAGC,SAAS;IAC/B,IAAI,CAACC,EAAE,GAAG,IAAIC,WAAU,CAAC,CAAC;EAC5B;EAEAC,KAAKA,CAAA,EAAG;IACN,KAAK,CAACA,KAAK,CAAC,CAAC;IAEb,IAAI,IAAI,CAACJ,cAAc,EAAE;MACvB,IAAI,CAACA,cAAc,CAACI,KAAK,CAAC,CAAC;IAC7B;IAEA,OAAO,IAAI;EACb;EAEAC,MAAMA,CAAA,EAAG;IACP,KAAK,CAACA,MAAM,CAAC,CAAC;IAEd,IAAI,IAAI,CAACL,cAAc,EAAE;MACvB,IAAI,CAACA,cAAc,CAACK,MAAM,CAAC,CAAC;IAC9B;IAEA,OAAO,IAAI;EACb;EAEAC,mBAAmBA,CAACC,QAAyC,EAAE;IAC7D;IACA,OAAO,IAAI,CAACL,EAAE,CAACM,MAAM,IAAIC,qBAAa,EAAE;MACtC;MACA,MAAMD,MAAM,GAAG,IAAI,CAACN,EAAE,CAACQ,YAAY,CAAC,CAAC,CAAC;MACtC,IAAIF,MAAM,GAAGC,qBAAa,EAAE;QAC1B,OAAOF,QAAQ,CAAC,IAAII,uBAAe,CAAC,mCAAmC,CAAC,CAAC;MAC3E;MAEA,IAAI,IAAI,CAACT,EAAE,CAACM,MAAM,IAAIA,MAAM,EAAE;QAC5B,MAAMI,IAAI,GAAG,IAAI,CAACV,EAAE,CAACW,KAAK,CAAC,CAAC,EAAEL,MAAM,CAAC;QACrC,IAAI,CAACN,EAAE,CAACY,OAAO,CAACN,MAAM,CAAC;;QAEvB;QACA,MAAMO,MAAM,GAAG,IAAIC,cAAM,CAACJ,IAAI,CAAC;QAC/B,IAAI,CAACd,KAAK,CAACiB,MAAM,CAAC,UAAU,EAAEA,MAAM,CAAC;QACrC,IAAI,CAACjB,KAAK,CAACc,IAAI,CAACG,MAAM,CAAC;QAEvB,IAAIE,OAAO,GAAG,IAAI,CAACjB,cAAc;QACjC,IAAIiB,OAAO,KAAKhB,SAAS,EAAE;UACzB,IAAI,CAACD,cAAc,GAAGiB,OAAO,GAAG,IAAIC,gBAAO,CAAC;YAAEC,IAAI,EAAEJ,MAAM,CAACI,IAAI,CAAC,CAAC;YAAEC,eAAe,EAAE;UAAM,CAAC,CAAC;UAC5F,IAAI,CAACC,IAAI,CAACJ,OAAO,CAAC;QACpB;QAEA,IAAIF,MAAM,CAACO,MAAM,CAAC,CAAC,EAAE;UACnB;UACA;UACAL,OAAO,CAACM,IAAI,CAAC,KAAK,EAAE,MAAM;YACxB,IAAI,CAACvB,cAAc,GAAGC,SAAS;YAC/B,IAAI,CAACK,mBAAmB,CAACC,QAAQ,CAAC;UACpC,CAAC,CAAC;UACFU,OAAO,CAACO,GAAG,CAACT,MAAM,CAACH,IAAI,CAAC,CAAC,CAAC;UAC1B;QACF,CAAC,MAAM,IAAI,CAACK,OAAO,CAACQ,KAAK,CAACV,MAAM,CAACH,IAAI,CAAC,CAAC,CAAC,EAAE;UACxC;UACA;UACAK,OAAO,CAACM,IAAI,CAAC,OAAO,EAAE,MAAM;YAC1B,IAAI,CAACjB,mBAAmB,CAACC,QAAQ,CAAC;UACpC,CAAC,CAAC;UACF;QACF;MACF,CAAC,MAAM;QACL;MACF;IACF;;IAEA;IACA;IACAA,QAAQ,CAAC,CAAC;EACZ;EAEAmB,UAAUA,CAACC,KAAa,EAAEC,SAAiB,EAAErB,QAAoB,EAAE;IACjE,IAAI,CAACL,EAAE,CAAC2B,MAAM,CAACF,KAAK,CAAC;IACrB,IAAI,CAACrB,mBAAmB,CAACC,QAAQ,CAAC;EACpC;AACF;AAAC,IAAAuB,QAAA,GAAAC,OAAA,CAAArC,OAAA,GAEcC,qBAAqB;AACpCqC,MAAM,CAACD,OAAO,GAAGpC,qBAAqB"}