.

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)
+  }
+}