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"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.Parser = void 0;
const messages_1 = require("./messages");
const buffer_reader_1 = require("./buffer-reader");
const assert_1 = __importDefault(require("assert"));
// every message is prefixed with a single bye
const CODE_LENGTH = 1;
// every message has an int32 length which includes itself but does
// NOT include the code in the length
const LEN_LENGTH = 4;
const HEADER_LENGTH = CODE_LENGTH + LEN_LENGTH;
const emptyBuffer = Buffer.allocUnsafe(0);
class Parser {
constructor(opts) {
this.buffer = emptyBuffer;
this.bufferLength = 0;
this.bufferOffset = 0;
this.reader = new buffer_reader_1.BufferReader();
if ((opts === null || opts === void 0 ? void 0 : opts.mode) === 'binary') {
throw new Error('Binary mode not supported yet');
}
this.mode = (opts === null || opts === void 0 ? void 0 : opts.mode) || 'text';
}
parse(buffer, callback) {
this.mergeBuffer(buffer);
const bufferFullLength = this.bufferOffset + this.bufferLength;
let offset = this.bufferOffset;
while (offset + HEADER_LENGTH <= bufferFullLength) {
// code is 1 byte long - it identifies the message type
const code = this.buffer[offset];
// length is 1 Uint32BE - it is the length of the message EXCLUDING the code
const length = this.buffer.readUInt32BE(offset + CODE_LENGTH);
const fullMessageLength = CODE_LENGTH + length;
if (fullMessageLength + offset <= bufferFullLength) {
const message = this.handlePacket(offset + HEADER_LENGTH, code, length, this.buffer);
callback(message);
offset += fullMessageLength;
}
else {
break;
}
}
if (offset === bufferFullLength) {
// No more use for the buffer
this.buffer = emptyBuffer;
this.bufferLength = 0;
this.bufferOffset = 0;
}
else {
// Adjust the cursors of remainingBuffer
this.bufferLength = bufferFullLength - offset;
this.bufferOffset = offset;
}
}
mergeBuffer(buffer) {
if (this.bufferLength > 0) {
const newLength = this.bufferLength + buffer.byteLength;
const newFullLength = newLength + this.bufferOffset;
if (newFullLength > this.buffer.byteLength) {
// We can't concat the new buffer with the remaining one
let newBuffer;
if (newLength <= this.buffer.byteLength && this.bufferOffset >= this.bufferLength) {
// We can move the relevant part to the beginning of the buffer instead of allocating a new buffer
newBuffer = this.buffer;
}
else {
// Allocate a new larger buffer
let newBufferLength = this.buffer.byteLength * 2;
while (newLength >= newBufferLength) {
newBufferLength *= 2;
}
newBuffer = Buffer.allocUnsafe(newBufferLength);
}
// Move the remaining buffer to the new one
this.buffer.copy(newBuffer, 0, this.bufferOffset, this.bufferOffset + this.bufferLength);
this.buffer = newBuffer;
this.bufferOffset = 0;
}
// Concat the new buffer with the remaining one
buffer.copy(this.buffer, this.bufferOffset + this.bufferLength);
this.bufferLength = newLength;
}
else {
this.buffer = buffer;
this.bufferOffset = 0;
this.bufferLength = buffer.byteLength;
}
}
handlePacket(offset, code, length, bytes) {
switch (code) {
case 50 /* BindComplete */:
return messages_1.bindComplete;
case 49 /* ParseComplete */:
return messages_1.parseComplete;
case 51 /* CloseComplete */:
return messages_1.closeComplete;
case 110 /* NoData */:
return messages_1.noData;
case 115 /* PortalSuspended */:
return messages_1.portalSuspended;
case 99 /* CopyDone */:
return messages_1.copyDone;
case 87 /* ReplicationStart */:
return messages_1.replicationStart;
case 73 /* EmptyQuery */:
return messages_1.emptyQuery;
case 68 /* DataRow */:
return this.parseDataRowMessage(offset, length, bytes);
case 67 /* CommandComplete */:
return this.parseCommandCompleteMessage(offset, length, bytes);
case 90 /* ReadyForQuery */:
return this.parseReadyForQueryMessage(offset, length, bytes);
case 65 /* NotificationResponse */:
return this.parseNotificationMessage(offset, length, bytes);
case 82 /* AuthenticationResponse */:
return this.parseAuthenticationResponse(offset, length, bytes);
case 83 /* ParameterStatus */:
return this.parseParameterStatusMessage(offset, length, bytes);
case 75 /* BackendKeyData */:
return this.parseBackendKeyData(offset, length, bytes);
case 69 /* ErrorMessage */:
return this.parseErrorMessage(offset, length, bytes, 'error');
case 78 /* NoticeMessage */:
return this.parseErrorMessage(offset, length, bytes, 'notice');
case 84 /* RowDescriptionMessage */:
return this.parseRowDescriptionMessage(offset, length, bytes);
case 116 /* ParameterDescriptionMessage */:
return this.parseParameterDescriptionMessage(offset, length, bytes);
case 71 /* CopyIn */:
return this.parseCopyInMessage(offset, length, bytes);
case 72 /* CopyOut */:
return this.parseCopyOutMessage(offset, length, bytes);
case 100 /* CopyData */:
return this.parseCopyData(offset, length, bytes);
default:
assert_1.default.fail(`unknown message code: ${code.toString(16)}`);
}
}
parseReadyForQueryMessage(offset, length, bytes) {
this.reader.setBuffer(offset, bytes);
const status = this.reader.string(1);
return new messages_1.ReadyForQueryMessage(length, status);
}
parseCommandCompleteMessage(offset, length, bytes) {
this.reader.setBuffer(offset, bytes);
const text = this.reader.cstring();
return new messages_1.CommandCompleteMessage(length, text);
}
parseCopyData(offset, length, bytes) {
const chunk = bytes.slice(offset, offset + (length - 4));
return new messages_1.CopyDataMessage(length, chunk);
}
parseCopyInMessage(offset, length, bytes) {
return this.parseCopyMessage(offset, length, bytes, 'copyInResponse');
}
parseCopyOutMessage(offset, length, bytes) {
return this.parseCopyMessage(offset, length, bytes, 'copyOutResponse');
}
parseCopyMessage(offset, length, bytes, messageName) {
this.reader.setBuffer(offset, bytes);
const isBinary = this.reader.byte() !== 0;
const columnCount = this.reader.int16();
const message = new messages_1.CopyResponse(length, messageName, isBinary, columnCount);
for (let i = 0; i < columnCount; i++) {
message.columnTypes[i] = this.reader.int16();
}
return message;
}
parseNotificationMessage(offset, length, bytes) {
this.reader.setBuffer(offset, bytes);
const processId = this.reader.int32();
const channel = this.reader.cstring();
const payload = this.reader.cstring();
return new messages_1.NotificationResponseMessage(length, processId, channel, payload);
}
parseRowDescriptionMessage(offset, length, bytes) {
this.reader.setBuffer(offset, bytes);
const fieldCount = this.reader.int16();
const message = new messages_1.RowDescriptionMessage(length, fieldCount);
for (let i = 0; i < fieldCount; i++) {
message.fields[i] = this.parseField();
}
return message;
}
parseField() {
const name = this.reader.cstring();
const tableID = this.reader.int32();
const columnID = this.reader.int16();
const dataTypeID = this.reader.int32();
const dataTypeSize = this.reader.int16();
const dataTypeModifier = this.reader.int32();
const mode = this.reader.int16() === 0 ? 'text' : 'binary';
return new messages_1.Field(name, tableID, columnID, dataTypeID, dataTypeSize, dataTypeModifier, mode);
}
parseParameterDescriptionMessage(offset, length, bytes) {
this.reader.setBuffer(offset, bytes);
const parameterCount = this.reader.int16();
const message = new messages_1.ParameterDescriptionMessage(length, parameterCount);
for (let i = 0; i < parameterCount; i++) {
message.dataTypeIDs[i] = this.reader.int32();
}
return message;
}
parseDataRowMessage(offset, length, bytes) {
this.reader.setBuffer(offset, bytes);
const fieldCount = this.reader.int16();
const fields = new Array(fieldCount);
for (let i = 0; i < fieldCount; i++) {
const len = this.reader.int32();
// a -1 for length means the value of the field is null
fields[i] = len === -1 ? null : this.reader.string(len);
}
return new messages_1.DataRowMessage(length, fields);
}
parseParameterStatusMessage(offset, length, bytes) {
this.reader.setBuffer(offset, bytes);
const name = this.reader.cstring();
const value = this.reader.cstring();
return new messages_1.ParameterStatusMessage(length, name, value);
}
parseBackendKeyData(offset, length, bytes) {
this.reader.setBuffer(offset, bytes);
const processID = this.reader.int32();
const secretKey = this.reader.int32();
return new messages_1.BackendKeyDataMessage(length, processID, secretKey);
}
parseAuthenticationResponse(offset, length, bytes) {
this.reader.setBuffer(offset, bytes);
const code = this.reader.int32();
// TODO(bmc): maybe better types here
const message = {
name: 'authenticationOk',
length,
};
switch (code) {
case 0: // AuthenticationOk
break;
case 3: // AuthenticationCleartextPassword
if (message.length === 8) {
message.name = 'authenticationCleartextPassword';
}
break;
case 5: // AuthenticationMD5Password
if (message.length === 12) {
message.name = 'authenticationMD5Password';
const salt = this.reader.bytes(4);
return new messages_1.AuthenticationMD5Password(length, salt);
}
break;
case 10: // AuthenticationSASL
message.name = 'authenticationSASL';
message.mechanisms = [];
let mechanism;
do {
mechanism = this.reader.cstring();
if (mechanism) {
message.mechanisms.push(mechanism);
}
} while (mechanism);
break;
case 11: // AuthenticationSASLContinue
message.name = 'authenticationSASLContinue';
message.data = this.reader.string(length - 8);
break;
case 12: // AuthenticationSASLFinal
message.name = 'authenticationSASLFinal';
message.data = this.reader.string(length - 8);
break;
default:
throw new Error('Unknown authenticationOk message type ' + code);
}
return message;
}
parseErrorMessage(offset, length, bytes, name) {
this.reader.setBuffer(offset, bytes);
const fields = {};
let fieldType = this.reader.string(1);
while (fieldType !== '\0') {
fields[fieldType] = this.reader.cstring();
fieldType = this.reader.string(1);
}
const messageValue = fields.M;
const message = name === 'notice' ? new messages_1.NoticeMessage(length, messageValue) : new messages_1.DatabaseError(messageValue, length, name);
message.severity = fields.S;
message.code = fields.C;
message.detail = fields.D;
message.hint = fields.H;
message.position = fields.P;
message.internalPosition = fields.p;
message.internalQuery = fields.q;
message.where = fields.W;
message.schema = fields.s;
message.table = fields.t;
message.column = fields.c;
message.dataType = fields.d;
message.constraint = fields.n;
message.file = fields.F;
message.line = fields.L;
message.routine = fields.R;
return message;
}
}
exports.Parser = Parser;
//# sourceMappingURL=parser.js.map
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308"use strict";var __importDefault = (this && this.__importDefault) || function (mod) {return (mod && mod.__esModule) ? mod : { "default": mod };};Object.defineProperty(exports, "__esModule", { value: true });exports.Parser = void 0;const messages_1 = require("./messages");const buffer_reader_1 = require("./buffer-reader");const assert_1 = __importDefault(require("assert"));// every message is prefixed with a single byeconst CODE_LENGTH = 1;// every message has an int32 length which includes itself but does// NOT include the code in the lengthconst LEN_LENGTH = 4;const HEADER_LENGTH = CODE_LENGTH + LEN_LENGTH;const emptyBuffer = Buffer.allocUnsafe(0);class Parser {constructor(opts) {this.buffer = emptyBuffer;this.bufferLength = 0;this.bufferOffset = 0;this.reader = new buffer_reader_1.BufferReader();if ((opts === null || opts === void 0 ? void 0 : opts.mode) === 'binary') {throw new Error('Binary mode not supported yet');}this.mode = (opts === null || opts === void 0 ? void 0 : opts.mode) || 'text';}parse(buffer, callback) {this.mergeBuffer(buffer);const bufferFullLength = this.bufferOffset + this.bufferLength;let offset = this.bufferOffset;while (offset + HEADER_LENGTH <= bufferFullLength) {// code is 1 byte long - it identifies the message typeconst code = this.buffer[offset];// length is 1 Uint32BE - it is the length of the message EXCLUDING the codeconst length = this.buffer.readUInt32BE(offset + CODE_LENGTH);const fullMessageLength = CODE_LENGTH + length;if (fullMessageLength + offset <= bufferFullLength) {const message = this.handlePacket(offset + HEADER_LENGTH, code, length, this.buffer);callback(message);offset += fullMessageLength;}else {break;}}if (offset === bufferFullLength) {// No more use for the bufferthis.buffer = emptyBuffer;this.bufferLength = 0;this.bufferOffset = 0;}else {// Adjust the cursors of remainingBufferthis.bufferLength = bufferFullLength - offset;this.bufferOffset = offset;}}mergeBuffer(buffer) {if (this.bufferLength > 0) {const newLength = this.bufferLength + buffer.byteLength;const newFullLength = newLength + this.bufferOffset;if (newFullLength > this.buffer.byteLength) {// We can't concat the new buffer with the remaining onelet newBuffer;if (newLength <= this.buffer.byteLength && this.bufferOffset >= this.bufferLength) {// We can move the relevant part to the beginning of the buffer instead of allocating a new buffernewBuffer = this.buffer;}else {// Allocate a new larger bufferlet newBufferLength = this.buffer.byteLength * 2;while (newLength >= newBufferLength) {newBufferLength *= 2;}newBuffer = Buffer.allocUnsafe(newBufferLength);}// Move the remaining buffer to the new onethis.buffer.copy(newBuffer, 0, this.bufferOffset, this.bufferOffset + this.bufferLength);this.buffer = newBuffer;this.bufferOffset = 0;}// Concat the new buffer with the remaining onebuffer.copy(this.buffer, this.bufferOffset + this.bufferLength);this.bufferLength = newLength;}else {this.buffer = buffer;this.bufferOffset = 0;this.bufferLength = buffer.byteLength;}}handlePacket(offset, code, length, bytes) {switch (code) {case 50 /* BindComplete */:return messages_1.bindComplete;case 49 /* ParseComplete */:return messages_1.parseComplete;case 51 /* CloseComplete */:return messages_1.closeComplete;case 110 /* NoData */:return messages_1.noData;case 115 /* PortalSuspended */:return messages_1.portalSuspended;case 99 /* CopyDone */:return messages_1.copyDone;case 87 /* ReplicationStart */:return messages_1.replicationStart;case 73 /* EmptyQuery */:return messages_1.emptyQuery;case 68 /* DataRow */:return this.parseDataRowMessage(offset, length, bytes);case 67 /* CommandComplete */:return this.parseCommandCompleteMessage(offset, length, bytes);case 90 /* ReadyForQuery */:return this.parseReadyForQueryMessage(offset, length, bytes);case 65 /* NotificationResponse */:return this.parseNotificationMessage(offset, length, bytes);case 82 /* AuthenticationResponse */:return this.parseAuthenticationResponse(offset, length, bytes);case 83 /* ParameterStatus */:return this.parseParameterStatusMessage(offset, length, bytes);case 75 /* BackendKeyData */:return this.parseBackendKeyData(offset, length, bytes);case 69 /* ErrorMessage */:return this.parseErrorMessage(offset, length, bytes, 'error');case 78 /* NoticeMessage */:return this.parseErrorMessage(offset, length, bytes, 'notice');case 84 /* RowDescriptionMessage */:return this.parseRowDescriptionMessage(offset, length, bytes);case 116 /* ParameterDescriptionMessage */:return this.parseParameterDescriptionMessage(offset, length, bytes);case 71 /* CopyIn */:return this.parseCopyInMessage(offset, length, bytes);case 72 /* CopyOut */:return this.parseCopyOutMessage(offset, length, bytes);case 100 /* CopyData */:return this.parseCopyData(offset, length, bytes);default:assert_1.default.fail(`unknown message code: ${code.toString(16)}`);}}parseReadyForQueryMessage(offset, length, bytes) {this.reader.setBuffer(offset, bytes);const status = this.reader.string(1);return new messages_1.ReadyForQueryMessage(length, status);}parseCommandCompleteMessage(offset, length, bytes) {this.reader.setBuffer(offset, bytes);const text = this.reader.cstring();return new messages_1.CommandCompleteMessage(length, text);}parseCopyData(offset, length, bytes) {const chunk = bytes.slice(offset, offset + (length - 4));return new messages_1.CopyDataMessage(length, chunk);}parseCopyInMessage(offset, length, bytes) {return this.parseCopyMessage(offset, length, bytes, 'copyInResponse');}parseCopyOutMessage(offset, length, bytes) {return this.parseCopyMessage(offset, length, bytes, 'copyOutResponse');}parseCopyMessage(offset, length, bytes, messageName) {this.reader.setBuffer(offset, bytes);const isBinary = this.reader.byte() !== 0;const columnCount = this.reader.int16();const message = new messages_1.CopyResponse(length, messageName, isBinary, columnCount);for (let i = 0; i < columnCount; i++) {message.columnTypes[i] = this.reader.int16();}return message;}parseNotificationMessage(offset, length, bytes) {this.reader.setBuffer(offset, bytes);const processId = this.reader.int32();const channel = this.reader.cstring();const payload = this.reader.cstring();return new messages_1.NotificationResponseMessage(length, processId, channel, payload);}parseRowDescriptionMessage(offset, length, bytes) {this.reader.setBuffer(offset, bytes);const fieldCount = this.reader.int16();const message = new messages_1.RowDescriptionMessage(length, fieldCount);for (let i = 0; i < fieldCount; i++) {message.fields[i] = this.parseField();}return message;}parseField() {const name = this.reader.cstring();const tableID = this.reader.int32();const columnID = this.reader.int16();const dataTypeID = this.reader.int32();const dataTypeSize = this.reader.int16();const dataTypeModifier = this.reader.int32();const mode = this.reader.int16() === 0 ? 'text' : 'binary';return new messages_1.Field(name, tableID, columnID, dataTypeID, dataTypeSize, dataTypeModifier, mode);}parseParameterDescriptionMessage(offset, length, bytes) {this.reader.setBuffer(offset, bytes);const parameterCount = this.reader.int16();const message = new messages_1.ParameterDescriptionMessage(length, parameterCount);for (let i = 0; i < parameterCount; i++) {message.dataTypeIDs[i] = this.reader.int32();}return message;}parseDataRowMessage(offset, length, bytes) {this.reader.setBuffer(offset, bytes);const fieldCount = this.reader.int16();const fields = new Array(fieldCount);for (let i = 0; i < fieldCount; i++) {const len = this.reader.int32();// a -1 for length means the value of the field is nullfields[i] = len === -1 ? null : this.reader.string(len);}return new messages_1.DataRowMessage(length, fields);}parseParameterStatusMessage(offset, length, bytes) {this.reader.setBuffer(offset, bytes);const name = this.reader.cstring();const value = this.reader.cstring();return new messages_1.ParameterStatusMessage(length, name, value);}parseBackendKeyData(offset, length, bytes) {this.reader.setBuffer(offset, bytes);const processID = this.reader.int32();const secretKey = this.reader.int32();return new messages_1.BackendKeyDataMessage(length, processID, secretKey);}parseAuthenticationResponse(offset, length, bytes) {this.reader.setBuffer(offset, bytes);const code = this.reader.int32();// TODO(bmc): maybe better types hereconst message = {name: 'authenticationOk',length,};switch (code) {case 0: // AuthenticationOkbreak;case 3: // AuthenticationCleartextPasswordif (message.length === 8) {message.name = 'authenticationCleartextPassword';}break;case 5: // AuthenticationMD5Passwordif (message.length === 12) {message.name = 'authenticationMD5Password';const salt = this.reader.bytes(4);return new messages_1.AuthenticationMD5Password(length, salt);}break;case 10: // AuthenticationSASLmessage.name = 'authenticationSASL';message.mechanisms = [];let mechanism;do {mechanism = this.reader.cstring();if (mechanism) {message.mechanisms.push(mechanism);}} while (mechanism);break;case 11: // AuthenticationSASLContinuemessage.name = 'authenticationSASLContinue';message.data = this.reader.string(length - 8);break;case 12: // AuthenticationSASLFinalmessage.name = 'authenticationSASLFinal';message.data = this.reader.string(length - 8);break;default:throw new Error('Unknown authenticationOk message type ' + code);}return message;}parseErrorMessage(offset, length, bytes, name) {this.reader.setBuffer(offset, bytes);const fields = {};let fieldType = this.reader.string(1);while (fieldType !== '\0') {fields[fieldType] = this.reader.cstring();fieldType = this.reader.string(1);}const messageValue = fields.M;const message = name === 'notice' ? new messages_1.NoticeMessage(length, messageValue) : new messages_1.DatabaseError(messageValue, length, name);message.severity = fields.S;message.code = fields.C;message.detail = fields.D;message.hint = fields.H;message.position = fields.P;message.internalPosition = fields.p;message.internalQuery = fields.q;message.where = fields.W;message.schema = fields.s;message.table = fields.t;message.column = fields.c;message.dataType = fields.d;message.constraint = fields.n;message.file = fields.F;message.line = fields.L;message.routine = fields.R;return message;}}exports.Parser = Parser;//# sourceMappingURL=parser.js.map