.

qwen/nodejs/node_modules/pg/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2010 - 2021 Brian Carlson
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

qwen/nodejs/node_modules/pg/README.md

@@ -0,0 +1,95 @@
+# node-postgres
+
+[![Build Status](https://secure.travis-ci.org/brianc/node-postgres.svg?branch=master)](http://travis-ci.org/brianc/node-postgres)
+<span class="badge-npmversion"><a href="https://npmjs.org/package/pg" title="View this project on NPM"><img src="https://img.shields.io/npm/v/pg.svg" alt="NPM version" /></a></span>
+<span class="badge-npmdownloads"><a href="https://npmjs.org/package/pg" title="View this project on NPM"><img src="https://img.shields.io/npm/dm/pg.svg" alt="NPM downloads" /></a></span>
+
+Non-blocking PostgreSQL client for Node.js. Pure JavaScript and optional native libpq bindings.
+
+## Install
+
+```sh
+$ npm install pg
+```
+
+---
+
+## :star: [Documentation](https://node-postgres.com) :star:
+
+### Features
+
+- Pure JavaScript client and native libpq bindings share _the same API_
+- Connection pooling
+- Extensible JS ↔ PostgreSQL data-type coercion
+- Supported PostgreSQL features
+  - Parameterized queries
+  - Named statements with query plan caching
+  - Async notifications with `LISTEN/NOTIFY`
+  - Bulk import & export with `COPY TO/COPY FROM`
+
+### Extras
+
+node-postgres is by design pretty light on abstractions. These are some handy modules we've been using over the years to complete the picture.
+The entire list can be found on our [wiki](https://github.com/brianc/node-postgres/wiki/Extras).
+
+## Support
+
+node-postgres is free software. If you encounter a bug with the library please open an issue on the [GitHub repo](https://github.com/brianc/node-postgres). If you have questions unanswered by the documentation please open an issue pointing out how the documentation was unclear & I will do my best to make it better!
+
+When you open an issue please provide:
+
+- version of Node
+- version of Postgres
+- smallest possible snippet of code to reproduce the problem
+
+You can also follow me [@briancarlson](https://twitter.com/briancarlson) if that's your thing. I try to always announce noteworthy changes & developments with node-postgres on Twitter.
+
+## Sponsorship :two_hearts:
+
+node-postgres's continued development has been made possible in part by generous financial support from [the community](https://github.com/brianc/node-postgres/blob/master/SPONSORS.md).
+
+If you or your company are benefiting from node-postgres and would like to help keep the project financially sustainable [please consider supporting](https://github.com/sponsors/brianc) its development.
+
+### Featured sponsor
+
+Special thanks to [medplum](https://medplum.com) for their generous and thoughtful support of node-postgres!
+
+![medplum](https://raw.githubusercontent.com/medplum/medplum-logo/refs/heads/main/medplum-logo.png)
+
+## Contributing
+
+**:heart: contributions!**
+
+I will **happily** accept your pull request if it:
+
+- **has tests**
+- looks reasonable
+- does not break backwards compatibility
+
+If your change involves breaking backwards compatibility please please point that out in the pull request & we can discuss & plan when and how to release it and what type of documentation or communicate it will require.
+
+## Troubleshooting and FAQ
+
+The causes and solutions to common errors can be found among the [Frequently Asked Questions (FAQ)](https://github.com/brianc/node-postgres/wiki/FAQ)
+
+## License
+
+Copyright (c) 2010-2020 Brian Carlson (brian.m.carlson@gmail.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

qwen/nodejs/node_modules/pg/esm/index.mjs

@@ -0,0 +1,20 @@
+// ESM wrapper for pg
+import pg from '../lib/index.js'
+
+// Re-export all the properties
+export const Client = pg.Client
+export const Pool = pg.Pool
+export const Connection = pg.Connection
+export const types = pg.types
+export const Query = pg.Query
+export const DatabaseError = pg.DatabaseError
+export const escapeIdentifier = pg.escapeIdentifier
+export const escapeLiteral = pg.escapeLiteral
+export const Result = pg.Result
+export const TypeOverrides = pg.TypeOverrides
+
+// Also export the defaults
+export const defaults = pg.defaults
+
+// Re-export the default
+export default pg

qwen/nodejs/node_modules/pg/lib/client.js

@@ -0,0 +1,650 @@
+'use strict'
+
+const EventEmitter = require('events').EventEmitter
+const utils = require('./utils')
+const sasl = require('./crypto/sasl')
+const TypeOverrides = require('./type-overrides')
+
+const ConnectionParameters = require('./connection-parameters')
+const Query = require('./query')
+const defaults = require('./defaults')
+const Connection = require('./connection')
+const crypto = require('./crypto/utils')
+
+class Client extends EventEmitter {
+  constructor(config) {
+    super()
+
+    this.connectionParameters = new ConnectionParameters(config)
+    this.user = this.connectionParameters.user
+    this.database = this.connectionParameters.database
+    this.port = this.connectionParameters.port
+    this.host = this.connectionParameters.host
+
+    // "hiding" the password so it doesn't show up in stack traces
+    // or if the client is console.logged
+    Object.defineProperty(this, 'password', {
+      configurable: true,
+      enumerable: false,
+      writable: true,
+      value: this.connectionParameters.password,
+    })
+
+    this.replication = this.connectionParameters.replication
+
+    const c = config || {}
+
+    this._Promise = c.Promise || global.Promise
+    this._types = new TypeOverrides(c.types)
+    this._ending = false
+    this._ended = false
+    this._connecting = false
+    this._connected = false
+    this._connectionError = false
+    this._queryable = true
+
+    this.enableChannelBinding = Boolean(c.enableChannelBinding) // set true to use SCRAM-SHA-256-PLUS when offered
+    this.connection =
+      c.connection ||
+      new Connection({
+        stream: c.stream,
+        ssl: this.connectionParameters.ssl,
+        keepAlive: c.keepAlive || false,
+        keepAliveInitialDelayMillis: c.keepAliveInitialDelayMillis || 0,
+        encoding: this.connectionParameters.client_encoding || 'utf8',
+      })
+    this.queryQueue = []
+    this.binary = c.binary || defaults.binary
+    this.processID = null
+    this.secretKey = null
+    this.ssl = this.connectionParameters.ssl || false
+    // As with Password, make SSL->Key (the private key) non-enumerable.
+    // It won't show up in stack traces
+    // or if the client is console.logged
+    if (this.ssl && this.ssl.key) {
+      Object.defineProperty(this.ssl, 'key', {
+        enumerable: false,
+      })
+    }
+
+    this._connectionTimeoutMillis = c.connectionTimeoutMillis || 0
+  }
+
+  _errorAllQueries(err) {
+    const enqueueError = (query) => {
+      process.nextTick(() => {
+        query.handleError(err, this.connection)
+      })
+    }
+
+    if (this.activeQuery) {
+      enqueueError(this.activeQuery)
+      this.activeQuery = null
+    }
+
+    this.queryQueue.forEach(enqueueError)
+    this.queryQueue.length = 0
+  }
+
+  _connect(callback) {
+    const self = this
+    const con = this.connection
+    this._connectionCallback = callback
+
+    if (this._connecting || this._connected) {
+      const err = new Error('Client has already been connected. You cannot reuse a client.')
+      process.nextTick(() => {
+        callback(err)
+      })
+      return
+    }
+    this._connecting = true
+
+    if (this._connectionTimeoutMillis > 0) {
+      this.connectionTimeoutHandle = setTimeout(() => {
+        con._ending = true
+        con.stream.destroy(new Error('timeout expired'))
+      }, this._connectionTimeoutMillis)
+
+      if (this.connectionTimeoutHandle.unref) {
+        this.connectionTimeoutHandle.unref()
+      }
+    }
+
+    if (this.host && this.host.indexOf('/') === 0) {
+      con.connect(this.host + '/.s.PGSQL.' + this.port)
+    } else {
+      con.connect(this.port, this.host)
+    }
+
+    // once connection is established send startup message
+    con.on('connect', function () {
+      if (self.ssl) {
+        con.requestSsl()
+      } else {
+        con.startup(self.getStartupConf())
+      }
+    })
+
+    con.on('sslconnect', function () {
+      con.startup(self.getStartupConf())
+    })
+
+    this._attachListeners(con)
+
+    con.once('end', () => {
+      const error = this._ending ? new Error('Connection terminated') : new Error('Connection terminated unexpectedly')
+
+      clearTimeout(this.connectionTimeoutHandle)
+      this._errorAllQueries(error)
+      this._ended = true
+
+      if (!this._ending) {
+        // if the connection is ended without us calling .end()
+        // on this client then we have an unexpected disconnection
+        // treat this as an error unless we've already emitted an error
+        // during connection.
+        if (this._connecting && !this._connectionError) {
+          if (this._connectionCallback) {
+            this._connectionCallback(error)
+          } else {
+            this._handleErrorEvent(error)
+          }
+        } else if (!this._connectionError) {
+          this._handleErrorEvent(error)
+        }
+      }
+
+      process.nextTick(() => {
+        this.emit('end')
+      })
+    })
+  }
+
+  connect(callback) {
+    if (callback) {
+      this._connect(callback)
+      return
+    }
+
+    return new this._Promise((resolve, reject) => {
+      this._connect((error) => {
+        if (error) {
+          reject(error)
+        } else {
+          resolve()
+        }
+      })
+    })
+  }
+
+  _attachListeners(con) {
+    // password request handling
+    con.on('authenticationCleartextPassword', this._handleAuthCleartextPassword.bind(this))
+    // password request handling
+    con.on('authenticationMD5Password', this._handleAuthMD5Password.bind(this))
+    // password request handling (SASL)
+    con.on('authenticationSASL', this._handleAuthSASL.bind(this))
+    con.on('authenticationSASLContinue', this._handleAuthSASLContinue.bind(this))
+    con.on('authenticationSASLFinal', this._handleAuthSASLFinal.bind(this))
+    con.on('backendKeyData', this._handleBackendKeyData.bind(this))
+    con.on('error', this._handleErrorEvent.bind(this))
+    con.on('errorMessage', this._handleErrorMessage.bind(this))
+    con.on('readyForQuery', this._handleReadyForQuery.bind(this))
+    con.on('notice', this._handleNotice.bind(this))
+    con.on('rowDescription', this._handleRowDescription.bind(this))
+    con.on('dataRow', this._handleDataRow.bind(this))
+    con.on('portalSuspended', this._handlePortalSuspended.bind(this))
+    con.on('emptyQuery', this._handleEmptyQuery.bind(this))
+    con.on('commandComplete', this._handleCommandComplete.bind(this))
+    con.on('parseComplete', this._handleParseComplete.bind(this))
+    con.on('copyInResponse', this._handleCopyInResponse.bind(this))
+    con.on('copyData', this._handleCopyData.bind(this))
+    con.on('notification', this._handleNotification.bind(this))
+  }
+
+  // TODO(bmc): deprecate pgpass "built in" integration since this.password can be a function
+  // it can be supplied by the user if required - this is a breaking change!
+  _checkPgPass(cb) {
+    const con = this.connection
+    if (typeof this.password === 'function') {
+      this._Promise
+        .resolve()
+        .then(() => this.password())
+        .then((pass) => {
+          if (pass !== undefined) {
+            if (typeof pass !== 'string') {
+              con.emit('error', new TypeError('Password must be a string'))
+              return
+            }
+            this.connectionParameters.password = this.password = pass
+          } else {
+            this.connectionParameters.password = this.password = null
+          }
+          cb()
+        })
+        .catch((err) => {
+          con.emit('error', err)
+        })
+    } else if (this.password !== null) {
+      cb()
+    } else {
+      try {
+        const pgPass = require('pgpass')
+        pgPass(this.connectionParameters, (pass) => {
+          if (undefined !== pass) {
+            this.connectionParameters.password = this.password = pass
+          }
+          cb()
+        })
+      } catch (e) {
+        this.emit('error', e)
+      }
+    }
+  }
+
+  _handleAuthCleartextPassword(msg) {
+    this._checkPgPass(() => {
+      this.connection.password(this.password)
+    })
+  }
+
+  _handleAuthMD5Password(msg) {
+    this._checkPgPass(async () => {
+      try {
+        const hashedPassword = await crypto.postgresMd5PasswordHash(this.user, this.password, msg.salt)
+        this.connection.password(hashedPassword)
+      } catch (e) {
+        this.emit('error', e)
+      }
+    })
+  }
+
+  _handleAuthSASL(msg) {
+    this._checkPgPass(() => {
+      try {
+        this.saslSession = sasl.startSession(msg.mechanisms, this.enableChannelBinding && this.connection.stream)
+        this.connection.sendSASLInitialResponseMessage(this.saslSession.mechanism, this.saslSession.response)
+      } catch (err) {
+        this.connection.emit('error', err)
+      }
+    })
+  }
+
+  async _handleAuthSASLContinue(msg) {
+    try {
+      await sasl.continueSession(
+        this.saslSession,
+        this.password,
+        msg.data,
+        this.enableChannelBinding && this.connection.stream
+      )
+      this.connection.sendSCRAMClientFinalMessage(this.saslSession.response)
+    } catch (err) {
+      this.connection.emit('error', err)
+    }
+  }
+
+  _handleAuthSASLFinal(msg) {
+    try {
+      sasl.finalizeSession(this.saslSession, msg.data)
+      this.saslSession = null
+    } catch (err) {
+      this.connection.emit('error', err)
+    }
+  }
+
+  _handleBackendKeyData(msg) {
+    this.processID = msg.processID
+    this.secretKey = msg.secretKey
+  }
+
+  _handleReadyForQuery(msg) {
+    if (this._connecting) {
+      this._connecting = false
+      this._connected = true
+      clearTimeout(this.connectionTimeoutHandle)
+
+      // process possible callback argument to Client#connect
+      if (this._connectionCallback) {
+        this._connectionCallback(null, this)
+        // remove callback for proper error handling
+        // after the connect event
+        this._connectionCallback = null
+      }
+      this.emit('connect')
+    }
+    const { activeQuery } = this
+    this.activeQuery = null
+    this.readyForQuery = true
+    if (activeQuery) {
+      activeQuery.handleReadyForQuery(this.connection)
+    }
+    this._pulseQueryQueue()
+  }
+
+  // if we receive an error event or error message
+  // during the connection process we handle it here
+  _handleErrorWhileConnecting(err) {
+    if (this._connectionError) {
+      // TODO(bmc): this is swallowing errors - we shouldn't do this
+      return
+    }
+    this._connectionError = true
+    clearTimeout(this.connectionTimeoutHandle)
+    if (this._connectionCallback) {
+      return this._connectionCallback(err)
+    }
+    this.emit('error', err)
+  }
+
+  // if we're connected and we receive an error event from the connection
+  // this means the socket is dead - do a hard abort of all queries and emit
+  // the socket error on the client as well
+  _handleErrorEvent(err) {
+    if (this._connecting) {
+      return this._handleErrorWhileConnecting(err)
+    }
+    this._queryable = false
+    this._errorAllQueries(err)
+    this.emit('error', err)
+  }
+
+  // handle error messages from the postgres backend
+  _handleErrorMessage(msg) {
+    if (this._connecting) {
+      return this._handleErrorWhileConnecting(msg)
+    }
+    const activeQuery = this.activeQuery
+
+    if (!activeQuery) {
+      this._handleErrorEvent(msg)
+      return
+    }
+
+    this.activeQuery = null
+    activeQuery.handleError(msg, this.connection)
+  }
+
+  _handleRowDescription(msg) {
+    // delegate rowDescription to active query
+    this.activeQuery.handleRowDescription(msg)
+  }
+
+  _handleDataRow(msg) {
+    // delegate dataRow to active query
+    this.activeQuery.handleDataRow(msg)
+  }
+
+  _handlePortalSuspended(msg) {
+    // delegate portalSuspended to active query
+    this.activeQuery.handlePortalSuspended(this.connection)
+  }
+
+  _handleEmptyQuery(msg) {
+    // delegate emptyQuery to active query
+    this.activeQuery.handleEmptyQuery(this.connection)
+  }
+
+  _handleCommandComplete(msg) {
+    if (this.activeQuery == null) {
+      const error = new Error('Received unexpected commandComplete message from backend.')
+      this._handleErrorEvent(error)
+      return
+    }
+    // delegate commandComplete to active query
+    this.activeQuery.handleCommandComplete(msg, this.connection)
+  }
+
+  _handleParseComplete() {
+    if (this.activeQuery == null) {
+      const error = new Error('Received unexpected parseComplete message from backend.')
+      this._handleErrorEvent(error)
+      return
+    }
+    // if a prepared statement has a name and properly parses
+    // we track that its already been executed so we don't parse
+    // it again on the same client
+    if (this.activeQuery.name) {
+      this.connection.parsedStatements[this.activeQuery.name] = this.activeQuery.text
+    }
+  }
+
+  _handleCopyInResponse(msg) {
+    this.activeQuery.handleCopyInResponse(this.connection)
+  }
+
+  _handleCopyData(msg) {
+    this.activeQuery.handleCopyData(msg, this.connection)
+  }
+
+  _handleNotification(msg) {
+    this.emit('notification', msg)
+  }
+
+  _handleNotice(msg) {
+    this.emit('notice', msg)
+  }
+
+  getStartupConf() {
+    const params = this.connectionParameters
+
+    const data = {
+      user: params.user,
+      database: params.database,
+    }
+
+    const appName = params.application_name || params.fallback_application_name
+    if (appName) {
+      data.application_name = appName
+    }
+    if (params.replication) {
+      data.replication = '' + params.replication
+    }
+    if (params.statement_timeout) {
+      data.statement_timeout = String(parseInt(params.statement_timeout, 10))
+    }
+    if (params.lock_timeout) {
+      data.lock_timeout = String(parseInt(params.lock_timeout, 10))
+    }
+    if (params.idle_in_transaction_session_timeout) {
+      data.idle_in_transaction_session_timeout = String(parseInt(params.idle_in_transaction_session_timeout, 10))
+    }
+    if (params.options) {
+      data.options = params.options
+    }
+
+    return data
+  }
+
+  cancel(client, query) {
+    if (client.activeQuery === query) {
+      const con = this.connection
+
+      if (this.host && this.host.indexOf('/') === 0) {
+        con.connect(this.host + '/.s.PGSQL.' + this.port)
+      } else {
+        con.connect(this.port, this.host)
+      }
+
+      // once connection is established send cancel message
+      con.on('connect', function () {
+        con.cancel(client.processID, client.secretKey)
+      })
+    } else if (client.queryQueue.indexOf(query) !== -1) {
+      client.queryQueue.splice(client.queryQueue.indexOf(query), 1)
+    }
+  }
+
+  setTypeParser(oid, format, parseFn) {
+    return this._types.setTypeParser(oid, format, parseFn)
+  }
+
+  getTypeParser(oid, format) {
+    return this._types.getTypeParser(oid, format)
+  }
+
+  // escapeIdentifier and escapeLiteral moved to utility functions & exported
+  // on PG
+  // re-exported here for backwards compatibility
+  escapeIdentifier(str) {
+    return utils.escapeIdentifier(str)
+  }
+
+  escapeLiteral(str) {
+    return utils.escapeLiteral(str)
+  }
+
+  _pulseQueryQueue() {
+    if (this.readyForQuery === true) {
+      this.activeQuery = this.queryQueue.shift()
+      if (this.activeQuery) {
+        this.readyForQuery = false
+        this.hasExecuted = true
+
+        const queryError = this.activeQuery.submit(this.connection)
+        if (queryError) {
+          process.nextTick(() => {
+            this.activeQuery.handleError(queryError, this.connection)
+            this.readyForQuery = true
+            this._pulseQueryQueue()
+          })
+        }
+      } else if (this.hasExecuted) {
+        this.activeQuery = null
+        this.emit('drain')
+      }
+    }
+  }
+
+  query(config, values, callback) {
+    // can take in strings, config object or query object
+    let query
+    let result
+    let readTimeout
+    let readTimeoutTimer
+    let queryCallback
+
+    if (config === null || config === undefined) {
+      throw new TypeError('Client was passed a null or undefined query')
+    } else if (typeof config.submit === 'function') {
+      readTimeout = config.query_timeout || this.connectionParameters.query_timeout
+      result = query = config
+      if (typeof values === 'function') {
+        query.callback = query.callback || values
+      }
+    } else {
+      readTimeout = config.query_timeout || this.connectionParameters.query_timeout
+      query = new Query(config, values, callback)
+      if (!query.callback) {
+        result = new this._Promise((resolve, reject) => {
+          query.callback = (err, res) => (err ? reject(err) : resolve(res))
+        }).catch((err) => {
+          // replace the stack trace that leads to `TCP.onStreamRead` with one that leads back to the
+          // application that created the query
+          Error.captureStackTrace(err)
+          throw err
+        })
+      }
+    }
+
+    if (readTimeout) {
+      queryCallback = query.callback
+
+      readTimeoutTimer = setTimeout(() => {
+        const error = new Error('Query read timeout')
+
+        process.nextTick(() => {
+          query.handleError(error, this.connection)
+        })
+
+        queryCallback(error)
+
+        // we already returned an error,
+        // just do nothing if query completes
+        query.callback = () => {}
+
+        // Remove from queue
+        const index = this.queryQueue.indexOf(query)
+        if (index > -1) {
+          this.queryQueue.splice(index, 1)
+        }
+
+        this._pulseQueryQueue()
+      }, readTimeout)
+
+      query.callback = (err, res) => {
+        clearTimeout(readTimeoutTimer)
+        queryCallback(err, res)
+      }
+    }
+
+    if (this.binary && !query.binary) {
+      query.binary = true
+    }
+
+    if (query._result && !query._result._types) {
+      query._result._types = this._types
+    }
+
+    if (!this._queryable) {
+      process.nextTick(() => {
+        query.handleError(new Error('Client has encountered a connection error and is not queryable'), this.connection)
+      })
+      return result
+    }
+
+    if (this._ending) {
+      process.nextTick(() => {
+        query.handleError(new Error('Client was closed and is not queryable'), this.connection)
+      })
+      return result
+    }
+
+    this.queryQueue.push(query)
+    this._pulseQueryQueue()
+    return result
+  }
+
+  ref() {
+    this.connection.ref()
+  }
+
+  unref() {
+    this.connection.unref()
+  }
+
+  end(cb) {
+    this._ending = true
+
+    // if we have never connected, then end is a noop, callback immediately
+    if (!this.connection._connecting || this._ended) {
+      if (cb) {
+        cb()
+      } else {
+        return this._Promise.resolve()
+      }
+    }
+
+    if (this.activeQuery || !this._queryable) {
+      // if we have an active query we need to force a disconnect
+      // on the socket - otherwise a hung query could block end forever
+      this.connection.stream.destroy()
+    } else {
+      this.connection.end()
+    }
+
+    if (cb) {
+      this.connection.once('end', cb)
+    } else {
+      return new this._Promise((resolve) => {
+        this.connection.once('end', resolve)
+      })
+    }
+  }
+}
+
+// expose a Query constructor
+Client.Query = Query
+
+module.exports = Client

qwen/nodejs/node_modules/pg/lib/connection-parameters.js

@@ -0,0 +1,167 @@
+'use strict'
+
+const dns = require('dns')
+
+const defaults = require('./defaults')
+
+const parse = require('pg-connection-string').parse // parses a connection string
+
+const val = function (key, config, envVar) {
+  if (envVar === undefined) {
+    envVar = process.env['PG' + key.toUpperCase()]
+  } else if (envVar === false) {
+    // do nothing ... use false
+  } else {
+    envVar = process.env[envVar]
+  }
+
+  return config[key] || envVar || defaults[key]
+}
+
+const readSSLConfigFromEnvironment = function () {
+  switch (process.env.PGSSLMODE) {
+    case 'disable':
+      return false
+    case 'prefer':
+    case 'require':
+    case 'verify-ca':
+    case 'verify-full':
+      return true
+    case 'no-verify':
+      return { rejectUnauthorized: false }
+  }
+  return defaults.ssl
+}
+
+// Convert arg to a string, surround in single quotes, and escape single quotes and backslashes
+const quoteParamValue = function (value) {
+  return "'" + ('' + value).replace(/\\/g, '\\\\').replace(/'/g, "\\'") + "'"
+}
+
+const add = function (params, config, paramName) {
+  const value = config[paramName]
+  if (value !== undefined && value !== null) {
+    params.push(paramName + '=' + quoteParamValue(value))
+  }
+}
+
+class ConnectionParameters {
+  constructor(config) {
+    // if a string is passed, it is a raw connection string so we parse it into a config
+    config = typeof config === 'string' ? parse(config) : config || {}
+
+    // if the config has a connectionString defined, parse IT into the config we use
+    // this will override other default values with what is stored in connectionString
+    if (config.connectionString) {
+      config = Object.assign({}, config, parse(config.connectionString))
+    }
+
+    this.user = val('user', config)
+    this.database = val('database', config)
+
+    if (this.database === undefined) {
+      this.database = this.user
+    }
+
+    this.port = parseInt(val('port', config), 10)
+    this.host = val('host', config)
+
+    // "hiding" the password so it doesn't show up in stack traces
+    // or if the client is console.logged
+    Object.defineProperty(this, 'password', {
+      configurable: true,
+      enumerable: false,
+      writable: true,
+      value: val('password', config),
+    })
+
+    this.binary = val('binary', config)
+    this.options = val('options', config)
+
+    this.ssl = typeof config.ssl === 'undefined' ? readSSLConfigFromEnvironment() : config.ssl
+
+    if (typeof this.ssl === 'string') {
+      if (this.ssl === 'true') {
+        this.ssl = true
+      }
+    }
+    // support passing in ssl=no-verify via connection string
+    if (this.ssl === 'no-verify') {
+      this.ssl = { rejectUnauthorized: false }
+    }
+    if (this.ssl && this.ssl.key) {
+      Object.defineProperty(this.ssl, 'key', {
+        enumerable: false,
+      })
+    }
+
+    this.client_encoding = val('client_encoding', config)
+    this.replication = val('replication', config)
+    // a domain socket begins with '/'
+    this.isDomainSocket = !(this.host || '').indexOf('/')
+
+    this.application_name = val('application_name', config, 'PGAPPNAME')
+    this.fallback_application_name = val('fallback_application_name', config, false)
+    this.statement_timeout = val('statement_timeout', config, false)
+    this.lock_timeout = val('lock_timeout', config, false)
+    this.idle_in_transaction_session_timeout = val('idle_in_transaction_session_timeout', config, false)
+    this.query_timeout = val('query_timeout', config, false)
+
+    if (config.connectionTimeoutMillis === undefined) {
+      this.connect_timeout = process.env.PGCONNECT_TIMEOUT || 0
+    } else {
+      this.connect_timeout = Math.floor(config.connectionTimeoutMillis / 1000)
+    }
+
+    if (config.keepAlive === false) {
+      this.keepalives = 0
+    } else if (config.keepAlive === true) {
+      this.keepalives = 1
+    }
+
+    if (typeof config.keepAliveInitialDelayMillis === 'number') {
+      this.keepalives_idle = Math.floor(config.keepAliveInitialDelayMillis / 1000)
+    }
+  }
+
+  getLibpqConnectionString(cb) {
+    const params = []
+    add(params, this, 'user')
+    add(params, this, 'password')
+    add(params, this, 'port')
+    add(params, this, 'application_name')
+    add(params, this, 'fallback_application_name')
+    add(params, this, 'connect_timeout')
+    add(params, this, 'options')
+
+    const ssl = typeof this.ssl === 'object' ? this.ssl : this.ssl ? { sslmode: this.ssl } : {}
+    add(params, ssl, 'sslmode')
+    add(params, ssl, 'sslca')
+    add(params, ssl, 'sslkey')
+    add(params, ssl, 'sslcert')
+    add(params, ssl, 'sslrootcert')
+
+    if (this.database) {
+      params.push('dbname=' + quoteParamValue(this.database))
+    }
+    if (this.replication) {
+      params.push('replication=' + quoteParamValue(this.replication))
+    }
+    if (this.host) {
+      params.push('host=' + quoteParamValue(this.host))
+    }
+    if (this.isDomainSocket) {
+      return cb(null, params.join(' '))
+    }
+    if (this.client_encoding) {
+      params.push('client_encoding=' + quoteParamValue(this.client_encoding))
+    }
+    dns.lookup(this.host, function (err, address) {
+      if (err) return cb(err, null)
+      params.push('hostaddr=' + quoteParamValue(address))
+      return cb(null, params.join(' '))
+    })
+  }
+}
+
+module.exports = ConnectionParameters

qwen/nodejs/node_modules/pg/lib/connection.js

@@ -0,0 +1,222 @@
+'use strict'
+
+const EventEmitter = require('events').EventEmitter
+
+const { parse, serialize } = require('pg-protocol')
+const { getStream, getSecureStream } = require('./stream')
+
+const flushBuffer = serialize.flush()
+const syncBuffer = serialize.sync()
+const endBuffer = serialize.end()
+
+// TODO(bmc) support binary mode at some point
+class Connection extends EventEmitter {
+  constructor(config) {
+    super()
+    config = config || {}
+
+    this.stream = config.stream || getStream(config.ssl)
+    if (typeof this.stream === 'function') {
+      this.stream = this.stream(config)
+    }
+
+    this._keepAlive = config.keepAlive
+    this._keepAliveInitialDelayMillis = config.keepAliveInitialDelayMillis
+    this.lastBuffer = false
+    this.parsedStatements = {}
+    this.ssl = config.ssl || false
+    this._ending = false
+    this._emitMessage = false
+    const self = this
+    this.on('newListener', function (eventName) {
+      if (eventName === 'message') {
+        self._emitMessage = true
+      }
+    })
+  }
+
+  connect(port, host) {
+    const self = this
+
+    this._connecting = true
+    this.stream.setNoDelay(true)
+    this.stream.connect(port, host)
+
+    this.stream.once('connect', function () {
+      if (self._keepAlive) {
+        self.stream.setKeepAlive(true, self._keepAliveInitialDelayMillis)
+      }
+      self.emit('connect')
+    })
+
+    const reportStreamError = function (error) {
+      // errors about disconnections should be ignored during disconnect
+      if (self._ending && (error.code === 'ECONNRESET' || error.code === 'EPIPE')) {
+        return
+      }
+      self.emit('error', error)
+    }
+    this.stream.on('error', reportStreamError)
+
+    this.stream.on('close', function () {
+      self.emit('end')
+    })
+
+    if (!this.ssl) {
+      return this.attachListeners(this.stream)
+    }
+
+    this.stream.once('data', function (buffer) {
+      const responseCode = buffer.toString('utf8')
+      switch (responseCode) {
+        case 'S': // Server supports SSL connections, continue with a secure connection
+          break
+        case 'N': // Server does not support SSL connections
+          self.stream.end()
+          return self.emit('error', new Error('The server does not support SSL connections'))
+        default:
+          // Any other response byte, including 'E' (ErrorResponse) indicating a server error
+          self.stream.end()
+          return self.emit('error', new Error('There was an error establishing an SSL connection'))
+      }
+      const options = {
+        socket: self.stream,
+      }
+
+      if (self.ssl !== true) {
+        Object.assign(options, self.ssl)
+
+        if ('key' in self.ssl) {
+          options.key = self.ssl.key
+        }
+      }
+
+      const net = require('net')
+      if (net.isIP && net.isIP(host) === 0) {
+        options.servername = host
+      }
+      try {
+        self.stream = getSecureStream(options)
+      } catch (err) {
+        return self.emit('error', err)
+      }
+      self.attachListeners(self.stream)
+      self.stream.on('error', reportStreamError)
+
+      self.emit('sslconnect')
+    })
+  }
+
+  attachListeners(stream) {
+    parse(stream, (msg) => {
+      const eventName = msg.name === 'error' ? 'errorMessage' : msg.name
+      if (this._emitMessage) {
+        this.emit('message', msg)
+      }
+      this.emit(eventName, msg)
+    })
+  }
+
+  requestSsl() {
+    this.stream.write(serialize.requestSsl())
+  }
+
+  startup(config) {
+    this.stream.write(serialize.startup(config))
+  }
+
+  cancel(processID, secretKey) {
+    this._send(serialize.cancel(processID, secretKey))
+  }
+
+  password(password) {
+    this._send(serialize.password(password))
+  }
+
+  sendSASLInitialResponseMessage(mechanism, initialResponse) {
+    this._send(serialize.sendSASLInitialResponseMessage(mechanism, initialResponse))
+  }
+
+  sendSCRAMClientFinalMessage(additionalData) {
+    this._send(serialize.sendSCRAMClientFinalMessage(additionalData))
+  }
+
+  _send(buffer) {
+    if (!this.stream.writable) {
+      return false
+    }
+    return this.stream.write(buffer)
+  }
+
+  query(text) {
+    this._send(serialize.query(text))
+  }
+
+  // send parse message
+  parse(query) {
+    this._send(serialize.parse(query))
+  }
+
+  // send bind message
+  bind(config) {
+    this._send(serialize.bind(config))
+  }
+
+  // send execute message
+  execute(config) {
+    this._send(serialize.execute(config))
+  }
+
+  flush() {
+    if (this.stream.writable) {
+      this.stream.write(flushBuffer)
+    }
+  }
+
+  sync() {
+    this._ending = true
+    this._send(syncBuffer)
+  }
+
+  ref() {
+    this.stream.ref()
+  }
+
+  unref() {
+    this.stream.unref()
+  }
+
+  end() {
+    // 0x58 = 'X'
+    this._ending = true
+    if (!this._connecting || !this.stream.writable) {
+      this.stream.end()
+      return
+    }
+    return this.stream.write(endBuffer, () => {
+      this.stream.end()
+    })
+  }
+
+  close(msg) {
+    this._send(serialize.close(msg))
+  }
+
+  describe(msg) {
+    this._send(serialize.describe(msg))
+  }
+
+  sendCopyFromChunk(chunk) {
+    this._send(serialize.copyData(chunk))
+  }
+
+  endCopyFrom() {
+    this._send(serialize.copyDone())
+  }
+
+  sendCopyFail(msg) {
+    this._send(serialize.copyFail(msg))
+  }
+}
+
+module.exports = Connection

qwen/nodejs/node_modules/pg/lib/crypto/cert-signatures.js

@@ -0,0 +1,122 @@
+function x509Error(msg, cert) {
+  return new Error('SASL channel binding: ' + msg + ' when parsing public certificate ' + cert.toString('base64'))
+}
+
+function readASN1Length(data, index) {
+  let length = data[index++]
+  if (length < 0x80) return { length, index }
+
+  const lengthBytes = length & 0x7f
+  if (lengthBytes > 4) throw x509Error('bad length', data)
+
+  length = 0
+  for (let i = 0; i < lengthBytes; i++) {
+    length = (length << 8) | data[index++]
+  }
+
+  return { length, index }
+}
+
+function readASN1OID(data, index) {
+  if (data[index++] !== 0x6) throw x509Error('non-OID data', data) // 6 = OID
+
+  const { length: OIDLength, index: indexAfterOIDLength } = readASN1Length(data, index)
+  index = indexAfterOIDLength
+  const lastIndex = index + OIDLength
+
+  const byte1 = data[index++]
+  let oid = ((byte1 / 40) >> 0) + '.' + (byte1 % 40)
+
+  while (index < lastIndex) {
+    // loop over numbers in OID
+    let value = 0
+    while (index < lastIndex) {
+      // loop over bytes in number
+      const nextByte = data[index++]
+      value = (value << 7) | (nextByte & 0x7f)
+      if (nextByte < 0x80) break
+    }
+    oid += '.' + value
+  }
+
+  return { oid, index }
+}
+
+function expectASN1Seq(data, index) {
+  if (data[index++] !== 0x30) throw x509Error('non-sequence data', data) // 30 = Sequence
+  return readASN1Length(data, index)
+}
+
+function signatureAlgorithmHashFromCertificate(data, index) {
+  // read this thread: https://www.postgresql.org/message-id/17760-b6c61e752ec07060%40postgresql.org
+  if (index === undefined) index = 0
+  index = expectASN1Seq(data, index).index
+  const { length: certInfoLength, index: indexAfterCertInfoLength } = expectASN1Seq(data, index)
+  index = indexAfterCertInfoLength + certInfoLength // skip over certificate info
+  index = expectASN1Seq(data, index).index // skip over signature length field
+  const { oid, index: indexAfterOID } = readASN1OID(data, index)
+  switch (oid) {
+    // RSA
+    case '1.2.840.113549.1.1.4':
+      return 'MD5'
+    case '1.2.840.113549.1.1.5':
+      return 'SHA-1'
+    case '1.2.840.113549.1.1.11':
+      return 'SHA-256'
+    case '1.2.840.113549.1.1.12':
+      return 'SHA-384'
+    case '1.2.840.113549.1.1.13':
+      return 'SHA-512'
+    case '1.2.840.113549.1.1.14':
+      return 'SHA-224'
+    case '1.2.840.113549.1.1.15':
+      return 'SHA512-224'
+    case '1.2.840.113549.1.1.16':
+      return 'SHA512-256'
+    // ECDSA
+    case '1.2.840.10045.4.1':
+      return 'SHA-1'
+    case '1.2.840.10045.4.3.1':
+      return 'SHA-224'
+    case '1.2.840.10045.4.3.2':
+      return 'SHA-256'
+    case '1.2.840.10045.4.3.3':
+      return 'SHA-384'
+    case '1.2.840.10045.4.3.4':
+      return 'SHA-512'
+    // RSASSA-PSS: hash is indicated separately
+    case '1.2.840.113549.1.1.10': {
+      index = indexAfterOID
+      index = expectASN1Seq(data, index).index
+      if (data[index++] !== 0xa0) throw x509Error('non-tag data', data) // a0 = constructed tag 0
+      index = readASN1Length(data, index).index // skip over tag length field
+      index = expectASN1Seq(data, index).index // skip over sequence length field
+      const { oid: hashOID } = readASN1OID(data, index)
+      switch (hashOID) {
+        // standalone hash OIDs
+        case '1.2.840.113549.2.5':
+          return 'MD5'
+        case '1.3.14.3.2.26':
+          return 'SHA-1'
+        case '2.16.840.1.101.3.4.2.1':
+          return 'SHA-256'
+        case '2.16.840.1.101.3.4.2.2':
+          return 'SHA-384'
+        case '2.16.840.1.101.3.4.2.3':
+          return 'SHA-512'
+      }
+      throw x509Error('unknown hash OID ' + hashOID, data)
+    }
+    // Ed25519 -- see https: return//github.com/openssl/openssl/issues/15477
+    case '1.3.101.110':
+    case '1.3.101.112': // ph
+      return 'SHA-512'
+    // Ed448 -- still not in pg 17.2 (if supported, digest would be SHAKE256 x 64 bytes)
+    case '1.3.101.111':
+    case '1.3.101.113': // ph
+      throw x509Error('Ed448 certificate channel binding is not currently supported by Postgres')
+  }
+  throw x509Error('unknown OID ' + oid, data)
+}
+
+module.exports = { signatureAlgorithmHashFromCertificate }

qwen/nodejs/node_modules/pg/lib/crypto/sasl.js

@@ -0,0 +1,212 @@
+'use strict'
+const crypto = require('./utils')
+const { signatureAlgorithmHashFromCertificate } = require('./cert-signatures')
+
+function startSession(mechanisms, stream) {
+  const candidates = ['SCRAM-SHA-256']
+  if (stream) candidates.unshift('SCRAM-SHA-256-PLUS') // higher-priority, so placed first
+
+  const mechanism = candidates.find((candidate) => mechanisms.includes(candidate))
+
+  if (!mechanism) {
+    throw new Error('SASL: Only mechanism(s) ' + candidates.join(' and ') + ' are supported')
+  }
+
+  if (mechanism === 'SCRAM-SHA-256-PLUS' && typeof stream.getPeerCertificate !== 'function') {
+    // this should never happen if we are really talking to a Postgres server
+    throw new Error('SASL: Mechanism SCRAM-SHA-256-PLUS requires a certificate')
+  }
+
+  const clientNonce = crypto.randomBytes(18).toString('base64')
+  const gs2Header = mechanism === 'SCRAM-SHA-256-PLUS' ? 'p=tls-server-end-point' : stream ? 'y' : 'n'
+
+  return {
+    mechanism,
+    clientNonce,
+    response: gs2Header + ',,n=*,r=' + clientNonce,
+    message: 'SASLInitialResponse',
+  }
+}
+
+async function continueSession(session, password, serverData, stream) {
+  if (session.message !== 'SASLInitialResponse') {
+    throw new Error('SASL: Last message was not SASLInitialResponse')
+  }
+  if (typeof password !== 'string') {
+    throw new Error('SASL: SCRAM-SERVER-FIRST-MESSAGE: client password must be a string')
+  }
+  if (password === '') {
+    throw new Error('SASL: SCRAM-SERVER-FIRST-MESSAGE: client password must be a non-empty string')
+  }
+  if (typeof serverData !== 'string') {
+    throw new Error('SASL: SCRAM-SERVER-FIRST-MESSAGE: serverData must be a string')
+  }
+
+  const sv = parseServerFirstMessage(serverData)
+
+  if (!sv.nonce.startsWith(session.clientNonce)) {
+    throw new Error('SASL: SCRAM-SERVER-FIRST-MESSAGE: server nonce does not start with client nonce')
+  } else if (sv.nonce.length === session.clientNonce.length) {
+    throw new Error('SASL: SCRAM-SERVER-FIRST-MESSAGE: server nonce is too short')
+  }
+
+  const clientFirstMessageBare = 'n=*,r=' + session.clientNonce
+  const serverFirstMessage = 'r=' + sv.nonce + ',s=' + sv.salt + ',i=' + sv.iteration
+
+  // without channel binding:
+  let channelBinding = stream ? 'eSws' : 'biws' // 'y,,' or 'n,,', base64-encoded
+
+  // override if channel binding is in use:
+  if (session.mechanism === 'SCRAM-SHA-256-PLUS') {
+    const peerCert = stream.getPeerCertificate().raw
+    let hashName = signatureAlgorithmHashFromCertificate(peerCert)
+    if (hashName === 'MD5' || hashName === 'SHA-1') hashName = 'SHA-256'
+    const certHash = await crypto.hashByName(hashName, peerCert)
+    const bindingData = Buffer.concat([Buffer.from('p=tls-server-end-point,,'), Buffer.from(certHash)])
+    channelBinding = bindingData.toString('base64')
+  }
+
+  const clientFinalMessageWithoutProof = 'c=' + channelBinding + ',r=' + sv.nonce
+  const authMessage = clientFirstMessageBare + ',' + serverFirstMessage + ',' + clientFinalMessageWithoutProof
+
+  const saltBytes = Buffer.from(sv.salt, 'base64')
+  const saltedPassword = await crypto.deriveKey(password, saltBytes, sv.iteration)
+  const clientKey = await crypto.hmacSha256(saltedPassword, 'Client Key')
+  const storedKey = await crypto.sha256(clientKey)
+  const clientSignature = await crypto.hmacSha256(storedKey, authMessage)
+  const clientProof = xorBuffers(Buffer.from(clientKey), Buffer.from(clientSignature)).toString('base64')
+  const serverKey = await crypto.hmacSha256(saltedPassword, 'Server Key')
+  const serverSignatureBytes = await crypto.hmacSha256(serverKey, authMessage)
+
+  session.message = 'SASLResponse'
+  session.serverSignature = Buffer.from(serverSignatureBytes).toString('base64')
+  session.response = clientFinalMessageWithoutProof + ',p=' + clientProof
+}
+
+function finalizeSession(session, serverData) {
+  if (session.message !== 'SASLResponse') {
+    throw new Error('SASL: Last message was not SASLResponse')
+  }
+  if (typeof serverData !== 'string') {
+    throw new Error('SASL: SCRAM-SERVER-FINAL-MESSAGE: serverData must be a string')
+  }
+
+  const { serverSignature } = parseServerFinalMessage(serverData)
+
+  if (serverSignature !== session.serverSignature) {
+    throw new Error('SASL: SCRAM-SERVER-FINAL-MESSAGE: server signature does not match')
+  }
+}
+
+/**
+ * printable       = %x21-2B / %x2D-7E
+ *                   ;; Printable ASCII except ",".
+ *                   ;; Note that any "printable" is also
+ *                   ;; a valid "value".
+ */
+function isPrintableChars(text) {
+  if (typeof text !== 'string') {
+    throw new TypeError('SASL: text must be a string')
+  }
+  return text
+    .split('')
+    .map((_, i) => text.charCodeAt(i))
+    .every((c) => (c >= 0x21 && c <= 0x2b) || (c >= 0x2d && c <= 0x7e))
+}
+
+/**
+ * base64-char     = ALPHA / DIGIT / "/" / "+"
+ *
+ * base64-4        = 4base64-char
+ *
+ * base64-3        = 3base64-char "="
+ *
+ * base64-2        = 2base64-char "=="
+ *
+ * base64          = *base64-4 [base64-3 / base64-2]
+ */
+function isBase64(text) {
+  return /^(?:[a-zA-Z0-9+/]{4})*(?:[a-zA-Z0-9+/]{2}==|[a-zA-Z0-9+/]{3}=)?$/.test(text)
+}
+
+function parseAttributePairs(text) {
+  if (typeof text !== 'string') {
+    throw new TypeError('SASL: attribute pairs text must be a string')
+  }
+
+  return new Map(
+    text.split(',').map((attrValue) => {
+      if (!/^.=/.test(attrValue)) {
+        throw new Error('SASL: Invalid attribute pair entry')
+      }
+      const name = attrValue[0]
+      const value = attrValue.substring(2)
+      return [name, value]
+    })
+  )
+}
+
+function parseServerFirstMessage(data) {
+  const attrPairs = parseAttributePairs(data)
+
+  const nonce = attrPairs.get('r')
+  if (!nonce) {
+    throw new Error('SASL: SCRAM-SERVER-FIRST-MESSAGE: nonce missing')
+  } else if (!isPrintableChars(nonce)) {
+    throw new Error('SASL: SCRAM-SERVER-FIRST-MESSAGE: nonce must only contain printable characters')
+  }
+  const salt = attrPairs.get('s')
+  if (!salt) {
+    throw new Error('SASL: SCRAM-SERVER-FIRST-MESSAGE: salt missing')
+  } else if (!isBase64(salt)) {
+    throw new Error('SASL: SCRAM-SERVER-FIRST-MESSAGE: salt must be base64')
+  }
+  const iterationText = attrPairs.get('i')
+  if (!iterationText) {
+    throw new Error('SASL: SCRAM-SERVER-FIRST-MESSAGE: iteration missing')
+  } else if (!/^[1-9][0-9]*$/.test(iterationText)) {
+    throw new Error('SASL: SCRAM-SERVER-FIRST-MESSAGE: invalid iteration count')
+  }
+  const iteration = parseInt(iterationText, 10)
+
+  return {
+    nonce,
+    salt,
+    iteration,
+  }
+}
+
+function parseServerFinalMessage(serverData) {
+  const attrPairs = parseAttributePairs(serverData)
+  const serverSignature = attrPairs.get('v')
+  if (!serverSignature) {
+    throw new Error('SASL: SCRAM-SERVER-FINAL-MESSAGE: server signature is missing')
+  } else if (!isBase64(serverSignature)) {
+    throw new Error('SASL: SCRAM-SERVER-FINAL-MESSAGE: server signature must be base64')
+  }
+  return {
+    serverSignature,
+  }
+}
+
+function xorBuffers(a, b) {
+  if (!Buffer.isBuffer(a)) {
+    throw new TypeError('first argument must be a Buffer')
+  }
+  if (!Buffer.isBuffer(b)) {
+    throw new TypeError('second argument must be a Buffer')
+  }
+  if (a.length !== b.length) {
+    throw new Error('Buffer lengths must match')
+  }
+  if (a.length === 0) {
+    throw new Error('Buffers cannot be empty')
+  }
+  return Buffer.from(a.map((_, i) => a[i] ^ b[i]))
+}
+
+module.exports = {
+  startSession,
+  continueSession,
+  finalizeSession,
+}

qwen/nodejs/node_modules/pg/lib/crypto/utils-legacy.js

@@ -0,0 +1,43 @@
+'use strict'
+// This file contains crypto utility functions for versions of Node.js < 15.0.0,
+// which does not support the WebCrypto.subtle API.
+
+const nodeCrypto = require('crypto')
+
+function md5(string) {
+  return nodeCrypto.createHash('md5').update(string, 'utf-8').digest('hex')
+}
+
+// See AuthenticationMD5Password at https://www.postgresql.org/docs/current/static/protocol-flow.html
+function postgresMd5PasswordHash(user, password, salt) {
+  const inner = md5(password + user)
+  const outer = md5(Buffer.concat([Buffer.from(inner), salt]))
+  return 'md5' + outer
+}
+
+function sha256(text) {
+  return nodeCrypto.createHash('sha256').update(text).digest()
+}
+
+function hashByName(hashName, text) {
+  hashName = hashName.replace(/(\D)-/, '$1') // e.g. SHA-256 -> SHA256
+  return nodeCrypto.createHash(hashName).update(text).digest()
+}
+
+function hmacSha256(key, msg) {
+  return nodeCrypto.createHmac('sha256', key).update(msg).digest()
+}
+
+async function deriveKey(password, salt, iterations) {
+  return nodeCrypto.pbkdf2Sync(password, salt, iterations, 32, 'sha256')
+}
+
+module.exports = {
+  postgresMd5PasswordHash,
+  randomBytes: nodeCrypto.randomBytes,
+  deriveKey,
+  sha256,
+  hashByName,
+  hmacSha256,
+  md5,
+}

qwen/nodejs/node_modules/pg/lib/crypto/utils-webcrypto.js

@@ -0,0 +1,89 @@
+const nodeCrypto = require('crypto')
+
+module.exports = {
+  postgresMd5PasswordHash,
+  randomBytes,
+  deriveKey,
+  sha256,
+  hashByName,
+  hmacSha256,
+  md5,
+}
+
+/**
+ * The Web Crypto API - grabbed from the Node.js library or the global
+ * @type Crypto
+ */
+// eslint-disable-next-line no-undef
+const webCrypto = nodeCrypto.webcrypto || globalThis.crypto
+/**
+ * The SubtleCrypto API for low level crypto operations.
+ * @type SubtleCrypto
+ */
+const subtleCrypto = webCrypto.subtle
+const textEncoder = new TextEncoder()
+
+/**
+ *
+ * @param {*} length
+ * @returns
+ */
+function randomBytes(length) {
+  return webCrypto.getRandomValues(Buffer.alloc(length))
+}
+
+async function md5(string) {
+  try {
+    return nodeCrypto.createHash('md5').update(string, 'utf-8').digest('hex')
+  } catch (e) {
+    // `createHash()` failed so we are probably not in Node.js, use the WebCrypto API instead.
+    // Note that the MD5 algorithm on WebCrypto is not available in Node.js.
+    // This is why we cannot just use WebCrypto in all environments.
+    const data = typeof string === 'string' ? textEncoder.encode(string) : string
+    const hash = await subtleCrypto.digest('MD5', data)
+    return Array.from(new Uint8Array(hash))
+      .map((b) => b.toString(16).padStart(2, '0'))
+      .join('')
+  }
+}
+
+// See AuthenticationMD5Password at https://www.postgresql.org/docs/current/static/protocol-flow.html
+async function postgresMd5PasswordHash(user, password, salt) {
+  const inner = await md5(password + user)
+  const outer = await md5(Buffer.concat([Buffer.from(inner), salt]))
+  return 'md5' + outer
+}
+
+/**
+ * Create a SHA-256 digest of the given data
+ * @param {Buffer} data
+ */
+async function sha256(text) {
+  return await subtleCrypto.digest('SHA-256', text)
+}
+
+async function hashByName(hashName, text) {
+  return await subtleCrypto.digest(hashName, text)
+}
+
+/**
+ * Sign the message with the given key
+ * @param {ArrayBuffer} keyBuffer
+ * @param {string} msg
+ */
+async function hmacSha256(keyBuffer, msg) {
+  const key = await subtleCrypto.importKey('raw', keyBuffer, { name: 'HMAC', hash: 'SHA-256' }, false, ['sign'])
+  return await subtleCrypto.sign('HMAC', key, textEncoder.encode(msg))
+}
+
+/**
+ * Derive a key from the password and salt
+ * @param {string} password
+ * @param {Uint8Array} salt
+ * @param {number} iterations
+ */
+async function deriveKey(password, salt, iterations) {
+  const key = await subtleCrypto.importKey('raw', textEncoder.encode(password), 'PBKDF2', false, ['deriveBits'])
+  const params = { name: 'PBKDF2', hash: 'SHA-256', salt: salt, iterations: iterations }
+  return await subtleCrypto.deriveBits(params, key, 32 * 8, ['deriveBits'])
+}

qwen/nodejs/node_modules/pg/lib/crypto/utils.js

@@ -0,0 +1,9 @@
+'use strict'
+
+const useLegacyCrypto = parseInt(process.versions && process.versions.node && process.versions.node.split('.')[0]) < 15
+if (useLegacyCrypto) {
+  // We are on an old version of Node.js that requires legacy crypto utilities.
+  module.exports = require('./utils-legacy')
+} else {
+  module.exports = require('./utils-webcrypto')
+}

qwen/nodejs/node_modules/pg/lib/defaults.js

@@ -0,0 +1,84 @@
+'use strict'
+
+module.exports = {
+  // database host. defaults to localhost
+  host: 'localhost',
+
+  // database user's name
+  user: process.platform === 'win32' ? process.env.USERNAME : process.env.USER,
+
+  // name of database to connect
+  database: undefined,
+
+  // database user's password
+  password: null,
+
+  // a Postgres connection string to be used instead of setting individual connection items
+  // NOTE:  Setting this value will cause it to override any other value (such as database or user) defined
+  // in the defaults object.
+  connectionString: undefined,
+
+  // database port
+  port: 5432,
+
+  // number of rows to return at a time from a prepared statement's
+  // portal. 0 will return all rows at once
+  rows: 0,
+
+  // binary result mode
+  binary: false,
+
+  // Connection pool options - see https://github.com/brianc/node-pg-pool
+
+  // number of connections to use in connection pool
+  // 0 will disable connection pooling
+  max: 10,
+
+  // max milliseconds a client can go unused before it is removed
+  // from the pool and destroyed
+  idleTimeoutMillis: 30000,
+
+  client_encoding: '',
+
+  ssl: false,
+
+  application_name: undefined,
+
+  fallback_application_name: undefined,
+
+  options: undefined,
+
+  parseInputDatesAsUTC: false,
+
+  // max milliseconds any query using this connection will execute for before timing out in error.
+  // false=unlimited
+  statement_timeout: false,
+
+  // Abort any statement that waits longer than the specified duration in milliseconds while attempting to acquire a lock.
+  // false=unlimited
+  lock_timeout: false,
+
+  // Terminate any session with an open transaction that has been idle for longer than the specified duration in milliseconds
+  // false=unlimited
+  idle_in_transaction_session_timeout: false,
+
+  // max milliseconds to wait for query to complete (client side)
+  query_timeout: false,
+
+  connect_timeout: 0,
+
+  keepalives: 1,
+
+  keepalives_idle: 0,
+}
+
+const pgTypes = require('pg-types')
+// save default parsers
+const parseBigInteger = pgTypes.getTypeParser(20, 'text')
+const parseBigIntegerArray = pgTypes.getTypeParser(1016, 'text')
+
+// parse int8 so you can get your count values as actual numbers
+module.exports.__defineSetter__('parseInt8', function (val) {
+  pgTypes.setTypeParser(20, 'text', val ? pgTypes.getTypeParser(23, 'text') : parseBigInteger)
+  pgTypes.setTypeParser(1016, 'text', val ? pgTypes.getTypeParser(1007, 'text') : parseBigIntegerArray)
+})

qwen/nodejs/node_modules/pg/lib/index.js

@@ -0,0 +1,64 @@
+'use strict'
+
+const Client = require('./client')
+const defaults = require('./defaults')
+const Connection = require('./connection')
+const Result = require('./result')
+const utils = require('./utils')
+const Pool = require('pg-pool')
+const TypeOverrides = require('./type-overrides')
+const { DatabaseError } = require('pg-protocol')
+const { escapeIdentifier, escapeLiteral } = require('./utils')
+
+const poolFactory = (Client) => {
+  return class BoundPool extends Pool {
+    constructor(options) {
+      super(options, Client)
+    }
+  }
+}
+
+const PG = function (clientConstructor) {
+  this.defaults = defaults
+  this.Client = clientConstructor
+  this.Query = this.Client.Query
+  this.Pool = poolFactory(this.Client)
+  this._pools = []
+  this.Connection = Connection
+  this.types = require('pg-types')
+  this.DatabaseError = DatabaseError
+  this.TypeOverrides = TypeOverrides
+  this.escapeIdentifier = escapeIdentifier
+  this.escapeLiteral = escapeLiteral
+  this.Result = Result
+  this.utils = utils
+}
+
+if (typeof process.env.NODE_PG_FORCE_NATIVE !== 'undefined') {
+  module.exports = new PG(require('./native'))
+} else {
+  module.exports = new PG(Client)
+
+  // lazy require native module...the native module may not have installed
+  Object.defineProperty(module.exports, 'native', {
+    configurable: true,
+    enumerable: false,
+    get() {
+      let native = null
+      try {
+        native = new PG(require('./native'))
+      } catch (err) {
+        if (err.code !== 'MODULE_NOT_FOUND') {
+          throw err
+        }
+      }
+
+      // overwrite module.exports.native so that getter is never called again
+      Object.defineProperty(module.exports, 'native', {
+        value: native,
+      })
+
+      return native
+    },
+  })
+}

qwen/nodejs/node_modules/pg/lib/native/client.js

@@ -0,0 +1,308 @@
+'use strict'
+
+// eslint-disable-next-line
+var Native
+// eslint-disable-next-line no-useless-catch
+try {
+  // Wrap this `require()` in a try-catch to avoid upstream bundlers from complaining that this might not be available since it is an optional import
+  Native = require('pg-native')
+} catch (e) {
+  throw e
+}
+const TypeOverrides = require('../type-overrides')
+const EventEmitter = require('events').EventEmitter
+const util = require('util')
+const ConnectionParameters = require('../connection-parameters')
+
+const NativeQuery = require('./query')
+
+const Client = (module.exports = function (config) {
+  EventEmitter.call(this)
+  config = config || {}
+
+  this._Promise = config.Promise || global.Promise
+  this._types = new TypeOverrides(config.types)
+
+  this.native = new Native({
+    types: this._types,
+  })
+
+  this._queryQueue = []
+  this._ending = false
+  this._connecting = false
+  this._connected = false
+  this._queryable = true
+
+  // keep these on the object for legacy reasons
+  // for the time being. TODO: deprecate all this jazz
+  const cp = (this.connectionParameters = new ConnectionParameters(config))
+  if (config.nativeConnectionString) cp.nativeConnectionString = config.nativeConnectionString
+  this.user = cp.user
+
+  // "hiding" the password so it doesn't show up in stack traces
+  // or if the client is console.logged
+  Object.defineProperty(this, 'password', {
+    configurable: true,
+    enumerable: false,
+    writable: true,
+    value: cp.password,
+  })
+  this.database = cp.database
+  this.host = cp.host
+  this.port = cp.port
+
+  // a hash to hold named queries
+  this.namedQueries = {}
+})
+
+Client.Query = NativeQuery
+
+util.inherits(Client, EventEmitter)
+
+Client.prototype._errorAllQueries = function (err) {
+  const enqueueError = (query) => {
+    process.nextTick(() => {
+      query.native = this.native
+      query.handleError(err)
+    })
+  }
+
+  if (this._hasActiveQuery()) {
+    enqueueError(this._activeQuery)
+    this._activeQuery = null
+  }
+
+  this._queryQueue.forEach(enqueueError)
+  this._queryQueue.length = 0
+}
+
+// connect to the backend
+// pass an optional callback to be called once connected
+// or with an error if there was a connection error
+Client.prototype._connect = function (cb) {
+  const self = this
+
+  if (this._connecting) {
+    process.nextTick(() => cb(new Error('Client has already been connected. You cannot reuse a client.')))
+    return
+  }
+
+  this._connecting = true
+
+  this.connectionParameters.getLibpqConnectionString(function (err, conString) {
+    if (self.connectionParameters.nativeConnectionString) conString = self.connectionParameters.nativeConnectionString
+    if (err) return cb(err)
+    self.native.connect(conString, function (err) {
+      if (err) {
+        self.native.end()
+        return cb(err)
+      }
+
+      // set internal states to connected
+      self._connected = true
+
+      // handle connection errors from the native layer
+      self.native.on('error', function (err) {
+        self._queryable = false
+        self._errorAllQueries(err)
+        self.emit('error', err)
+      })
+
+      self.native.on('notification', function (msg) {
+        self.emit('notification', {
+          channel: msg.relname,
+          payload: msg.extra,
+        })
+      })
+
+      // signal we are connected now
+      self.emit('connect')
+      self._pulseQueryQueue(true)
+
+      cb()
+    })
+  })
+}
+
+Client.prototype.connect = function (callback) {
+  if (callback) {
+    this._connect(callback)
+    return
+  }
+
+  return new this._Promise((resolve, reject) => {
+    this._connect((error) => {
+      if (error) {
+        reject(error)
+      } else {
+        resolve()
+      }
+    })
+  })
+}
+
+// send a query to the server
+// this method is highly overloaded to take
+// 1) string query, optional array of parameters, optional function callback
+// 2) object query with {
+//    string query
+//    optional array values,
+//    optional function callback instead of as a separate parameter
+//    optional string name to name & cache the query plan
+//    optional string rowMode = 'array' for an array of results
+//  }
+Client.prototype.query = function (config, values, callback) {
+  let query
+  let result
+  let readTimeout
+  let readTimeoutTimer
+  let queryCallback
+
+  if (config === null || config === undefined) {
+    throw new TypeError('Client was passed a null or undefined query')
+  } else if (typeof config.submit === 'function') {
+    readTimeout = config.query_timeout || this.connectionParameters.query_timeout
+    result = query = config
+    // accept query(new Query(...), (err, res) => { }) style
+    if (typeof values === 'function') {
+      config.callback = values
+    }
+  } else {
+    readTimeout = config.query_timeout || this.connectionParameters.query_timeout
+    query = new NativeQuery(config, values, callback)
+    if (!query.callback) {
+      let resolveOut, rejectOut
+      result = new this._Promise((resolve, reject) => {
+        resolveOut = resolve
+        rejectOut = reject
+      }).catch((err) => {
+        Error.captureStackTrace(err)
+        throw err
+      })
+      query.callback = (err, res) => (err ? rejectOut(err) : resolveOut(res))
+    }
+  }
+
+  if (readTimeout) {
+    queryCallback = query.callback
+
+    readTimeoutTimer = setTimeout(() => {
+      const error = new Error('Query read timeout')
+
+      process.nextTick(() => {
+        query.handleError(error, this.connection)
+      })
+
+      queryCallback(error)
+
+      // we already returned an error,
+      // just do nothing if query completes
+      query.callback = () => {}
+
+      // Remove from queue
+      const index = this._queryQueue.indexOf(query)
+      if (index > -1) {
+        this._queryQueue.splice(index, 1)
+      }
+
+      this._pulseQueryQueue()
+    }, readTimeout)
+
+    query.callback = (err, res) => {
+      clearTimeout(readTimeoutTimer)
+      queryCallback(err, res)
+    }
+  }
+
+  if (!this._queryable) {
+    query.native = this.native
+    process.nextTick(() => {
+      query.handleError(new Error('Client has encountered a connection error and is not queryable'))
+    })
+    return result
+  }
+
+  if (this._ending) {
+    query.native = this.native
+    process.nextTick(() => {
+      query.handleError(new Error('Client was closed and is not queryable'))
+    })
+    return result
+  }
+
+  this._queryQueue.push(query)
+  this._pulseQueryQueue()
+  return result
+}
+
+// disconnect from the backend server
+Client.prototype.end = function (cb) {
+  const self = this
+
+  this._ending = true
+
+  if (!this._connected) {
+    this.once('connect', this.end.bind(this, cb))
+  }
+  let result
+  if (!cb) {
+    result = new this._Promise(function (resolve, reject) {
+      cb = (err) => (err ? reject(err) : resolve())
+    })
+  }
+  this.native.end(function () {
+    self._errorAllQueries(new Error('Connection terminated'))
+
+    process.nextTick(() => {
+      self.emit('end')
+      if (cb) cb()
+    })
+  })
+  return result
+}
+
+Client.prototype._hasActiveQuery = function () {
+  return this._activeQuery && this._activeQuery.state !== 'error' && this._activeQuery.state !== 'end'
+}
+
+Client.prototype._pulseQueryQueue = function (initialConnection) {
+  if (!this._connected) {
+    return
+  }
+  if (this._hasActiveQuery()) {
+    return
+  }
+  const query = this._queryQueue.shift()
+  if (!query) {
+    if (!initialConnection) {
+      this.emit('drain')
+    }
+    return
+  }
+  this._activeQuery = query
+  query.submit(this)
+  const self = this
+  query.once('_done', function () {
+    self._pulseQueryQueue()
+  })
+}
+
+// attempt to cancel an in-progress query
+Client.prototype.cancel = function (query) {
+  if (this._activeQuery === query) {
+    this.native.cancel(function () {})
+  } else if (this._queryQueue.indexOf(query) !== -1) {
+    this._queryQueue.splice(this._queryQueue.indexOf(query), 1)
+  }
+}
+
+Client.prototype.ref = function () {}
+Client.prototype.unref = function () {}
+
+Client.prototype.setTypeParser = function (oid, format, parseFn) {
+  return this._types.setTypeParser(oid, format, parseFn)
+}
+
+Client.prototype.getTypeParser = function (oid, format) {
+  return this._types.getTypeParser(oid, format)
+}

qwen/nodejs/node_modules/pg/lib/native/index.js

@@ -0,0 +1,2 @@
+'use strict'
+module.exports = require('./client')

qwen/nodejs/node_modules/pg/lib/native/query.js

@@ -0,0 +1,165 @@
+'use strict'
+
+const EventEmitter = require('events').EventEmitter
+const util = require('util')
+const utils = require('../utils')
+
+const NativeQuery = (module.exports = function (config, values, callback) {
+  EventEmitter.call(this)
+  config = utils.normalizeQueryConfig(config, values, callback)
+  this.text = config.text
+  this.values = config.values
+  this.name = config.name
+  this.queryMode = config.queryMode
+  this.callback = config.callback
+  this.state = 'new'
+  this._arrayMode = config.rowMode === 'array'
+
+  // if the 'row' event is listened for
+  // then emit them as they come in
+  // without setting singleRowMode to true
+  // this has almost no meaning because libpq
+  // reads all rows into memory before returning any
+  this._emitRowEvents = false
+  this.on(
+    'newListener',
+    function (event) {
+      if (event === 'row') this._emitRowEvents = true
+    }.bind(this)
+  )
+})
+
+util.inherits(NativeQuery, EventEmitter)
+
+const errorFieldMap = {
+  sqlState: 'code',
+  statementPosition: 'position',
+  messagePrimary: 'message',
+  context: 'where',
+  schemaName: 'schema',
+  tableName: 'table',
+  columnName: 'column',
+  dataTypeName: 'dataType',
+  constraintName: 'constraint',
+  sourceFile: 'file',
+  sourceLine: 'line',
+  sourceFunction: 'routine',
+}
+
+NativeQuery.prototype.handleError = function (err) {
+  // copy pq error fields into the error object
+  const fields = this.native.pq.resultErrorFields()
+  if (fields) {
+    for (const key in fields) {
+      const normalizedFieldName = errorFieldMap[key] || key
+      err[normalizedFieldName] = fields[key]
+    }
+  }
+  if (this.callback) {
+    this.callback(err)
+  } else {
+    this.emit('error', err)
+  }
+  this.state = 'error'
+}
+
+NativeQuery.prototype.then = function (onSuccess, onFailure) {
+  return this._getPromise().then(onSuccess, onFailure)
+}
+
+NativeQuery.prototype.catch = function (callback) {
+  return this._getPromise().catch(callback)
+}
+
+NativeQuery.prototype._getPromise = function () {
+  if (this._promise) return this._promise
+  this._promise = new Promise(
+    function (resolve, reject) {
+      this._once('end', resolve)
+      this._once('error', reject)
+    }.bind(this)
+  )
+  return this._promise
+}
+
+NativeQuery.prototype.submit = function (client) {
+  this.state = 'running'
+  const self = this
+  this.native = client.native
+  client.native.arrayMode = this._arrayMode
+
+  let after = function (err, rows, results) {
+    client.native.arrayMode = false
+    setImmediate(function () {
+      self.emit('_done')
+    })
+
+    // handle possible query error
+    if (err) {
+      return self.handleError(err)
+    }
+
+    // emit row events for each row in the result
+    if (self._emitRowEvents) {
+      if (results.length > 1) {
+        rows.forEach((rowOfRows, i) => {
+          rowOfRows.forEach((row) => {
+            self.emit('row', row, results[i])
+          })
+        })
+      } else {
+        rows.forEach(function (row) {
+          self.emit('row', row, results)
+        })
+      }
+    }
+
+    // handle successful result
+    self.state = 'end'
+    self.emit('end', results)
+    if (self.callback) {
+      self.callback(null, results)
+    }
+  }
+
+  if (process.domain) {
+    after = process.domain.bind(after)
+  }
+
+  // named query
+  if (this.name) {
+    if (this.name.length > 63) {
+      console.error('Warning! Postgres only supports 63 characters for query names.')
+      console.error('You supplied %s (%s)', this.name, this.name.length)
+      console.error('This can cause conflicts and silent errors executing queries')
+    }
+    const values = (this.values || []).map(utils.prepareValue)
+
+    // check if the client has already executed this named query
+    // if so...just execute it again - skip the planning phase
+    if (client.namedQueries[this.name]) {
+      if (this.text && client.namedQueries[this.name] !== this.text) {
+        const err = new Error(`Prepared statements must be unique - '${this.name}' was used for a different statement`)
+        return after(err)
+      }
+      return client.native.execute(this.name, values, after)
+    }
+    // plan the named query the first time, then execute it
+    return client.native.prepare(this.name, this.text, values.length, function (err) {
+      if (err) return after(err)
+      client.namedQueries[self.name] = self.text
+      return self.native.execute(self.name, values, after)
+    })
+  } else if (this.values) {
+    if (!Array.isArray(this.values)) {
+      const err = new Error('Query values must be an array')
+      return after(err)
+    }
+    const vals = this.values.map(utils.prepareValue)
+    client.native.query(this.text, vals, after)
+  } else if (this.queryMode === 'extended') {
+    client.native.query(this.text, [], after)
+  } else {
+    client.native.query(this.text, after)
+  }
+}

qwen/nodejs/node_modules/pg/lib/query.js

@@ -0,0 +1,252 @@
+'use strict'
+
+const { EventEmitter } = require('events')
+
+const Result = require('./result')
+const utils = require('./utils')
+
+class Query extends EventEmitter {
+  constructor(config, values, callback) {
+    super()
+
+    config = utils.normalizeQueryConfig(config, values, callback)
+
+    this.text = config.text
+    this.values = config.values
+    this.rows = config.rows
+    this.types = config.types
+    this.name = config.name
+    this.queryMode = config.queryMode
+    this.binary = config.binary
+    // use unique portal name each time
+    this.portal = config.portal || ''
+    this.callback = config.callback
+    this._rowMode = config.rowMode
+    if (process.domain && config.callback) {
+      this.callback = process.domain.bind(config.callback)
+    }
+    this._result = new Result(this._rowMode, this.types)
+
+    // potential for multiple results
+    this._results = this._result
+    this._canceledDueToError = false
+  }
+
+  requiresPreparation() {
+    if (this.queryMode === 'extended') {
+      return true
+    }
+
+    // named queries must always be prepared
+    if (this.name) {
+      return true
+    }
+    // always prepare if there are max number of rows expected per
+    // portal execution
+    if (this.rows) {
+      return true
+    }
+    // don't prepare empty text queries
+    if (!this.text) {
+      return false
+    }
+    // prepare if there are values
+    if (!this.values) {
+      return false
+    }
+    return this.values.length > 0
+  }
+
+  _checkForMultirow() {
+    // if we already have a result with a command property
+    // then we've already executed one query in a multi-statement simple query
+    // turn our results into an array of results
+    if (this._result.command) {
+      if (!Array.isArray(this._results)) {
+        this._results = [this._result]
+      }
+      this._result = new Result(this._rowMode, this._result._types)
+      this._results.push(this._result)
+    }
+  }
+
+  // associates row metadata from the supplied
+  // message with this query object
+  // metadata used when parsing row results
+  handleRowDescription(msg) {
+    this._checkForMultirow()
+    this._result.addFields(msg.fields)
+    this._accumulateRows = this.callback || !this.listeners('row').length
+  }
+
+  handleDataRow(msg) {
+    let row
+
+    if (this._canceledDueToError) {
+      return
+    }
+
+    try {
+      row = this._result.parseRow(msg.fields)
+    } catch (err) {
+      this._canceledDueToError = err
+      return
+    }
+
+    this.emit('row', row, this._result)
+    if (this._accumulateRows) {
+      this._result.addRow(row)
+    }
+  }
+
+  handleCommandComplete(msg, connection) {
+    this._checkForMultirow()
+    this._result.addCommandComplete(msg)
+    // need to sync after each command complete of a prepared statement
+    // if we were using a row count which results in multiple calls to _getRows
+    if (this.rows) {
+      connection.sync()
+    }
+  }
+
+  // if a named prepared statement is created with empty query text
+  // the backend will send an emptyQuery message but *not* a command complete message
+  // since we pipeline sync immediately after execute we don't need to do anything here
+  // unless we have rows specified, in which case we did not pipeline the initial sync call
+  handleEmptyQuery(connection) {
+    if (this.rows) {
+      connection.sync()
+    }
+  }
+
+  handleError(err, connection) {
+    // need to sync after error during a prepared statement
+    if (this._canceledDueToError) {
+      err = this._canceledDueToError
+      this._canceledDueToError = false
+    }
+    // if callback supplied do not emit error event as uncaught error
+    // events will bubble up to node process
+    if (this.callback) {
+      return this.callback(err)
+    }
+    this.emit('error', err)
+  }
+
+  handleReadyForQuery(con) {
+    if (this._canceledDueToError) {
+      return this.handleError(this._canceledDueToError, con)
+    }
+    if (this.callback) {
+      try {
+        this.callback(null, this._results)
+      } catch (err) {
+        process.nextTick(() => {
+          throw err
+        })
+      }
+    }
+    this.emit('end', this._results)
+  }
+
+  submit(connection) {
+    if (typeof this.text !== 'string' && typeof this.name !== 'string') {
+      return new Error('A query must have either text or a name. Supplying neither is unsupported.')
+    }
+    const previous = connection.parsedStatements[this.name]
+    if (this.text && previous && this.text !== previous) {
+      return new Error(`Prepared statements must be unique - '${this.name}' was used for a different statement`)
+    }
+    if (this.values && !Array.isArray(this.values)) {
+      return new Error('Query values must be an array')
+    }
+    if (this.requiresPreparation()) {
+      // If we're using the extended query protocol we fire off several separate commands
+      // to the backend. On some versions of node & some operating system versions
+      // the network stack writes each message separately instead of buffering them together
+      // causing the client & network to send more slowly. Corking & uncorking the stream
+      // allows node to buffer up the messages internally before sending them all off at once.
+      // note: we're checking for existence of cork/uncork because some versions of streams
+      // might not have this (cloudflare?)
+      connection.stream.cork && connection.stream.cork()
+      try {
+        this.prepare(connection)
+      } finally {
+        // while unlikely for this.prepare to throw, if it does & we don't uncork this stream
+        // this client becomes unresponsive, so put in finally block "just in case"
+        connection.stream.uncork && connection.stream.uncork()
+      }
+    } else {
+      connection.query(this.text)
+    }
+    return null
+  }
+
+  hasBeenParsed(connection) {
+    return this.name && connection.parsedStatements[this.name]
+  }
+
+  handlePortalSuspended(connection) {
+    this._getRows(connection, this.rows)
+  }
+
+  _getRows(connection, rows) {
+    connection.execute({
+      portal: this.portal,
+      rows: rows,
+    })
+    // if we're not reading pages of rows send the sync command
+    // to indicate the pipeline is finished
+    if (!rows) {
+      connection.sync()
+    } else {
+      // otherwise flush the call out to read more rows
+      connection.flush()
+    }
+  }
+
+  // http://developer.postgresql.org/pgdocs/postgres/protocol-flow.html#PROTOCOL-FLOW-EXT-QUERY
+  prepare(connection) {
+    // TODO refactor this poor encapsulation
+    if (!this.hasBeenParsed(connection)) {
+      connection.parse({
+        text: this.text,
+        name: this.name,
+        types: this.types,
+      })
+    }
+
+    // because we're mapping user supplied values to
+    // postgres wire protocol compatible values it could
+    // throw an exception, so try/catch this section
+    try {
+      connection.bind({
+        portal: this.portal,
+        statement: this.name,
+        values: this.values,
+        binary: this.binary,
+        valueMapper: utils.prepareValue,
+      })
+    } catch (err) {
+      this.handleError(err, connection)
+      return
+    }
+
+    connection.describe({
+      type: 'P',
+      name: this.portal || '',
+    })
+
+    this._getRows(connection, this.rows)
+  }
+
+  handleCopyInResponse(connection) {
+    connection.sendCopyFail('No source stream defined')
+  }
+
+  handleCopyData(msg, connection) {
+    // noop
+  }
+}
+
+module.exports = Query

qwen/nodejs/node_modules/pg/lib/result.js

@@ -0,0 +1,109 @@
+'use strict'
+
+const types = require('pg-types')
+
+const matchRegexp = /^([A-Za-z]+)(?: (\d+))?(?: (\d+))?/
+
+// result object returned from query
+// in the 'end' event and also
+// passed as second argument to provided callback
+class Result {
+  constructor(rowMode, types) {
+    this.command = null
+    this.rowCount = null
+    this.oid = null
+    this.rows = []
+    this.fields = []
+    this._parsers = undefined
+    this._types = types
+    this.RowCtor = null
+    this.rowAsArray = rowMode === 'array'
+    if (this.rowAsArray) {
+      this.parseRow = this._parseRowAsArray
+    }
+    this._prebuiltEmptyResultObject = null
+  }
+
+  // adds a command complete message
+  addCommandComplete(msg) {
+    let match
+    if (msg.text) {
+      // pure javascript
+      match = matchRegexp.exec(msg.text)
+    } else {
+      // native bindings
+      match = matchRegexp.exec(msg.command)
+    }
+    if (match) {
+      this.command = match[1]
+      if (match[3]) {
+        // COMMAND OID ROWS
+        this.oid = parseInt(match[2], 10)
+        this.rowCount = parseInt(match[3], 10)
+      } else if (match[2]) {
+        // COMMAND ROWS
+        this.rowCount = parseInt(match[2], 10)
+      }
+    }
+  }
+
+  _parseRowAsArray(rowData) {
+    const row = new Array(rowData.length)
+    for (let i = 0, len = rowData.length; i < len; i++) {
+      const rawValue = rowData[i]
+      if (rawValue !== null) {
+        row[i] = this._parsers[i](rawValue)
+      } else {
+        row[i] = null
+      }
+    }
+    return row
+  }
+
+  parseRow(rowData) {
+    const row = { ...this._prebuiltEmptyResultObject }
+    for (let i = 0, len = rowData.length; i < len; i++) {
+      const rawValue = rowData[i]
+      const field = this.fields[i].name
+      if (rawValue !== null) {
+        const v = this.fields[i].format === 'binary' ? Buffer.from(rawValue) : rawValue
+        row[field] = this._parsers[i](v)
+      } else {
+        row[field] = null
+      }
+    }
+    return row
+  }
+
+  addRow(row) {
+    this.rows.push(row)
+  }
+
+  addFields(fieldDescriptions) {
+    // clears field definitions
+    // multiple query statements in 1 action can result in multiple sets
+    // of rowDescriptions...eg: 'select NOW(); select 1::int;'
+    // you need to reset the fields
+    this.fields = fieldDescriptions
+    if (this.fields.length) {
+      this._parsers = new Array(fieldDescriptions.length)
+    }
+
+    const row = {}
+
+    for (let i = 0; i < fieldDescriptions.length; i++) {
+      const desc = fieldDescriptions[i]
+      row[desc.name] = null
+
+      if (this._types) {
+        this._parsers[i] = this._types.getTypeParser(desc.dataTypeID, desc.format || 'text')
+      } else {
+        this._parsers[i] = types.getTypeParser(desc.dataTypeID, desc.format || 'text')
+      }
+    }
+
+    this._prebuiltEmptyResultObject = { ...row }
+  }
+}
+
+module.exports = Result

qwen/nodejs/node_modules/pg/lib/stream.js

@@ -0,0 +1,83 @@
+const { getStream, getSecureStream } = getStreamFuncs()
+
+module.exports = {
+  /**
+   * Get a socket stream compatible with the current runtime environment.
+   * @returns {Duplex}
+   */
+  getStream,
+  /**
+   * Get a TLS secured socket, compatible with the current environment,
+   * using the socket and other settings given in `options`.
+   * @returns {Duplex}
+   */
+  getSecureStream,
+}
+
+/**
+ * The stream functions that work in Node.js
+ */
+function getNodejsStreamFuncs() {
+  function getStream(ssl) {
+    const net = require('net')
+    return new net.Socket()
+  }
+
+  function getSecureStream(options) {
+    const tls = require('tls')
+    return tls.connect(options)
+  }
+  return {
+    getStream,
+    getSecureStream,
+  }
+}
+
+/**
+ * The stream functions that work in Cloudflare Workers
+ */
+function getCloudflareStreamFuncs() {
+  function getStream(ssl) {
+    const { CloudflareSocket } = require('pg-cloudflare')
+    return new CloudflareSocket(ssl)
+  }
+
+  function getSecureStream(options) {
+    options.socket.startTls(options)
+    return options.socket
+  }
+  return {
+    getStream,
+    getSecureStream,
+  }
+}
+
+/**
+ * Are we running in a Cloudflare Worker?
+ *
+ * @returns true if the code is currently running inside a Cloudflare Worker.
+ */
+function isCloudflareRuntime() {
+  // Since 2022-03-21 the `global_navigator` compatibility flag is on for Cloudflare Workers
+  // which means that `navigator.userAgent` will be defined.
+  // eslint-disable-next-line no-undef
+  if (typeof navigator === 'object' && navigator !== null && typeof navigator.userAgent === 'string') {
+    // eslint-disable-next-line no-undef
+    return navigator.userAgent === 'Cloudflare-Workers'
+  }
+  // In case `navigator` or `navigator.userAgent` is not defined then try a more sneaky approach
+  if (typeof Response === 'function') {
+    const resp = new Response(null, { cf: { thing: true } })
+    if (typeof resp.cf === 'object' && resp.cf !== null && resp.cf.thing) {
+      return true
+    }
+  }
+  return false
+}
+
+function getStreamFuncs() {
+  if (isCloudflareRuntime()) {
+    return getCloudflareStreamFuncs()
+  }
+  return getNodejsStreamFuncs()
+}

qwen/nodejs/node_modules/pg/lib/type-overrides.js

@@ -0,0 +1,35 @@
+'use strict'
+
+const types = require('pg-types')
+
+function TypeOverrides(userTypes) {
+  this._types = userTypes || types
+  this.text = {}
+  this.binary = {}
+}
+
+TypeOverrides.prototype.getOverrides = function (format) {
+  switch (format) {
+    case 'text':
+      return this.text
+    case 'binary':
+      return this.binary
+    default:
+      return {}
+  }
+}
+
+TypeOverrides.prototype.setTypeParser = function (oid, format, parseFn) {
+  if (typeof format === 'function') {
+    parseFn = format
+    format = 'text'
+  }
+  this.getOverrides(format)[oid] = parseFn
+}
+
+TypeOverrides.prototype.getTypeParser = function (oid, format) {
+  format = format || 'text'
+  return this.getOverrides(format)[oid] || this._types.getTypeParser(oid, format)
+}
+
+module.exports = TypeOverrides

qwen/nodejs/node_modules/pg/lib/utils.js

@@ -0,0 +1,217 @@
+'use strict'
+
+const defaults = require('./defaults')
+
+const util = require('util')
+const { isDate } = util.types || util // Node 8 doesn't have `util.types`
+
+function escapeElement(elementRepresentation) {
+  const escaped = elementRepresentation.replace(/\\/g, '\\\\').replace(/"/g, '\\"')
+
+  return '"' + escaped + '"'
+}
+
+// convert a JS array to a postgres array literal
+// uses comma separator so won't work for types like box that use
+// a different array separator.
+function arrayString(val) {
+  let result = '{'
+  for (let i = 0; i < val.length; i++) {
+    if (i > 0) {
+      result = result + ','
+    }
+    if (val[i] === null || typeof val[i] === 'undefined') {
+      result = result + 'NULL'
+    } else if (Array.isArray(val[i])) {
+      result = result + arrayString(val[i])
+    } else if (ArrayBuffer.isView(val[i])) {
+      let item = val[i]
+      if (!(item instanceof Buffer)) {
+        const buf = Buffer.from(item.buffer, item.byteOffset, item.byteLength)
+        if (buf.length === item.byteLength) {
+          item = buf
+        } else {
+          item = buf.slice(item.byteOffset, item.byteOffset + item.byteLength)
+        }
+      }
+      result += '\\\\x' + item.toString('hex')
+    } else {
+      result += escapeElement(prepareValue(val[i]))
+    }
+  }
+  result = result + '}'
+  return result
+}
+
+// converts values from javascript types
+// to their 'raw' counterparts for use as a postgres parameter
+// note: you can override this function to provide your own conversion mechanism
+// for complex types, etc...
+const prepareValue = function (val, seen) {
+  // null and undefined are both null for postgres
+  if (val == null) {
+    return null
+  }
+  if (typeof val === 'object') {
+    if (val instanceof Buffer) {
+      return val
+    }
+    if (ArrayBuffer.isView(val)) {
+      const buf = Buffer.from(val.buffer, val.byteOffset, val.byteLength)
+      if (buf.length === val.byteLength) {
+        return buf
+      }
+      return buf.slice(val.byteOffset, val.byteOffset + val.byteLength) // Node.js v4 does not support those Buffer.from params
+    }
+    if (isDate(val)) {
+      if (defaults.parseInputDatesAsUTC) {
+        return dateToStringUTC(val)
+      } else {
+        return dateToString(val)
+      }
+    }
+    if (Array.isArray(val)) {
+      return arrayString(val)
+    }
+
+    return prepareObject(val, seen)
+  }
+  return val.toString()
+}
+
+function prepareObject(val, seen) {
+  if (val && typeof val.toPostgres === 'function') {
+    seen = seen || []
+    if (seen.indexOf(val) !== -1) {
+      throw new Error('circular reference detected while preparing "' + val + '" for query')
+    }
+    seen.push(val)
+
+    return prepareValue(val.toPostgres(prepareValue), seen)
+  }
+  return JSON.stringify(val)
+}
+
+function dateToString(date) {
+  let offset = -date.getTimezoneOffset()
+
+  let year = date.getFullYear()
+  const isBCYear = year < 1
+  if (isBCYear) year = Math.abs(year) + 1 // negative years are 1 off their BC representation
+
+  let ret =
+    String(year).padStart(4, '0') +
+    '-' +
+    String(date.getMonth() + 1).padStart(2, '0') +
+    '-' +
+    String(date.getDate()).padStart(2, '0') +
+    'T' +
+    String(date.getHours()).padStart(2, '0') +
+    ':' +
+    String(date.getMinutes()).padStart(2, '0') +
+    ':' +
+    String(date.getSeconds()).padStart(2, '0') +
+    '.' +
+    String(date.getMilliseconds()).padStart(3, '0')
+
+  if (offset < 0) {
+    ret += '-'
+    offset *= -1
+  } else {
+    ret += '+'
+  }
+
+  ret += String(Math.floor(offset / 60)).padStart(2, '0') + ':' + String(offset % 60).padStart(2, '0')
+  if (isBCYear) ret += ' BC'
+  return ret
+}
+
+function dateToStringUTC(date) {
+  let year = date.getUTCFullYear()
+  const isBCYear = year < 1
+  if (isBCYear) year = Math.abs(year) + 1 // negative years are 1 off their BC representation
+
+  let ret =
+    String(year).padStart(4, '0') +
+    '-' +
+    String(date.getUTCMonth() + 1).padStart(2, '0') +
+    '-' +
+    String(date.getUTCDate()).padStart(2, '0') +
+    'T' +
+    String(date.getUTCHours()).padStart(2, '0') +
+    ':' +
+    String(date.getUTCMinutes()).padStart(2, '0') +
+    ':' +
+    String(date.getUTCSeconds()).padStart(2, '0') +
+    '.' +
+    String(date.getUTCMilliseconds()).padStart(3, '0')
+
+  ret += '+00:00'
+  if (isBCYear) ret += ' BC'
+  return ret
+}
+
+function normalizeQueryConfig(config, values, callback) {
+  // can take in strings or config objects
+  config = typeof config === 'string' ? { text: config } : config
+  if (values) {
+    if (typeof values === 'function') {
+      config.callback = values
+    } else {
+      config.values = values
+    }
+  }
+  if (callback) {
+    config.callback = callback
+  }
+  return config
+}
+
+// Ported from PostgreSQL 9.2.4 source code in src/interfaces/libpq/fe-exec.c
+const escapeIdentifier = function (str) {
+  return '"' + str.replace(/"/g, '""') + '"'
+}
+
+const escapeLiteral = function (str) {
+  let hasBackslash = false
+  let escaped = "'"
+
+  if (str == null) {
+    return "''"
+  }
+
+  if (typeof str !== 'string') {
+    return "''"
+  }
+
+  for (let i = 0; i < str.length; i++) {
+    const c = str[i]
+    if (c === "'") {
+      escaped += c + c
+    } else if (c === '\\') {
+      escaped += c + c
+      hasBackslash = true
+    } else {
+      escaped += c
+    }
+  }
+
+  escaped += "'"
+
+  if (hasBackslash === true) {
+    escaped = ' E' + escaped
+  }
+
+  return escaped
+}
+
+module.exports = {
+  prepareValue: function prepareValueWrapper(value) {
+    // this ensures that extra arguments do not get passed into prepareValue
+    // by accident, eg: from calling values.map(utils.prepareValue)
+    return prepareValue(value)
+  },
+  normalizeQueryConfig,
+  escapeIdentifier,
+  escapeLiteral,
+}

qwen/nodejs/node_modules/pg/package.json

@@ -0,0 +1,76 @@
+{
+  "name": "pg",
+  "version": "8.16.3",
+  "description": "PostgreSQL client - pure javascript & libpq with the same API",
+  "keywords": [
+    "database",
+    "libpq",
+    "pg",
+    "postgre",
+    "postgres",
+    "postgresql",
+    "rdbms"
+  ],
+  "homepage": "https://github.com/brianc/node-postgres",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/brianc/node-postgres.git",
+    "directory": "packages/pg"
+  },
+  "author": "Brian Carlson <brian.m.carlson@gmail.com>",
+  "main": "./lib",
+  "exports": {
+    ".": {
+      "import": "./esm/index.mjs",
+      "require": "./lib/index.js",
+      "default": "./lib/index.js"
+    },
+    "./package.json": {
+      "default": "./package.json"
+    },
+    "./lib/*": "./lib/*.js",
+    "./lib/*.js": "./lib/*.js"
+  },
+  "dependencies": {
+    "pg-connection-string": "^2.9.1",
+    "pg-pool": "^3.10.1",
+    "pg-protocol": "^1.10.3",
+    "pg-types": "2.2.0",
+    "pgpass": "1.0.5"
+  },
+  "devDependencies": {
+    "@cloudflare/vitest-pool-workers": "0.8.23",
+    "@cloudflare/workers-types": "^4.20230404.0",
+    "async": "2.6.4",
+    "bluebird": "3.7.2",
+    "co": "4.6.0",
+    "pg-copy-streams": "0.3.0",
+    "typescript": "^4.0.3",
+    "vitest": "~3.0.9",
+    "wrangler": "^3.x"
+  },
+  "optionalDependencies": {
+    "pg-cloudflare": "^1.2.7"
+  },
+  "peerDependencies": {
+    "pg-native": ">=3.0.1"
+  },
+  "peerDependenciesMeta": {
+    "pg-native": {
+      "optional": true
+    }
+  },
+  "scripts": {
+    "test": "make test-all"
+  },
+  "files": [
+    "lib",
+    "esm",
+    "SPONSORS.md"
+  ],
+  "license": "MIT",
+  "engines": {
+    "node": ">= 16.0.0"
+  },
+  "gitHead": "8f8e7315e8f7c1bb01e98fdb41c8c92585510782"
+}