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Lukas Nowy
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express-server/node_modules/pg/lib/native/client.js
generated
vendored
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256
express-server/node_modules/pg/lib/native/client.js
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@ -0,0 +1,256 @@
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'use strict'
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/**
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* Copyright (c) 2010-2017 Brian Carlson (brian.m.carlson@gmail.com)
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* All rights reserved.
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*
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* This source code is licensed under the MIT license found in the
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* README.md file in the root directory of this source tree.
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*/
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var Native = require('pg-native')
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var TypeOverrides = require('../type-overrides')
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var semver = require('semver')
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var pkg = require('../../package.json')
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var assert = require('assert')
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var EventEmitter = require('events').EventEmitter
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var util = require('util')
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var ConnectionParameters = require('../connection-parameters')
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var msg = 'Version >= ' + pkg.minNativeVersion + ' of pg-native required.'
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assert(semver.gte(Native.version, pkg.minNativeVersion), msg)
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var NativeQuery = require('./query')
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var Client = module.exports = function (config) {
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EventEmitter.call(this)
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config = config || {}
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this._Promise = config.Promise || global.Promise
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this._types = new TypeOverrides(config.types)
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this.native = new Native({
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types: this._types
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})
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this._queryQueue = []
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this._ending = false
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this._connecting = false
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this._connected = false
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this._queryable = true
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// keep these on the object for legacy reasons
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// for the time being. TODO: deprecate all this jazz
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var cp = this.connectionParameters = new ConnectionParameters(config)
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this.user = cp.user
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this.password = cp.password
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this.database = cp.database
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this.host = cp.host
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this.port = cp.port
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// a hash to hold named queries
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this.namedQueries = {}
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}
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Client.Query = NativeQuery
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util.inherits(Client, EventEmitter)
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Client.prototype._errorAllQueries = function (err) {
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const enqueueError = (query) => {
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process.nextTick(() => {
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query.native = this.native
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query.handleError(err)
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})
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}
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if (this._hasActiveQuery()) {
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enqueueError(this._activeQuery)
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this._activeQuery = null
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}
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this._queryQueue.forEach(enqueueError)
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this._queryQueue.length = 0
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}
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// connect to the backend
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// pass an optional callback to be called once connected
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// or with an error if there was a connection error
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Client.prototype._connect = function (cb) {
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var self = this
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if (this._connecting) {
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process.nextTick(() => cb(new Error('Client has already been connected. You cannot reuse a client.')))
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return
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}
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this._connecting = true
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this.connectionParameters.getLibpqConnectionString(function (err, conString) {
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if (err) return cb(err)
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self.native.connect(conString, function (err) {
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if (err) return cb(err)
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// set internal states to connected
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self._connected = true
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// handle connection errors from the native layer
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self.native.on('error', function (err) {
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self._queryable = false
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self._errorAllQueries(err)
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self.emit('error', err)
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})
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self.native.on('notification', function (msg) {
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self.emit('notification', {
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channel: msg.relname,
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payload: msg.extra
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})
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})
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// signal we are connected now
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self.emit('connect')
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self._pulseQueryQueue(true)
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cb()
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})
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})
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}
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Client.prototype.connect = function (callback) {
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if (callback) {
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this._connect(callback)
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return
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}
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return new this._Promise((resolve, reject) => {
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this._connect((error) => {
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if (error) {
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reject(error)
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} else {
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resolve()
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}
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})
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})
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}
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// send a query to the server
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// this method is highly overloaded to take
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// 1) string query, optional array of parameters, optional function callback
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// 2) object query with {
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// string query
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// optional array values,
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// optional function callback instead of as a separate parameter
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// optional string name to name & cache the query plan
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// optional string rowMode = 'array' for an array of results
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// }
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Client.prototype.query = function (config, values, callback) {
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var query
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var result
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if (typeof config.submit === 'function') {
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result = query = config
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// accept query(new Query(...), (err, res) => { }) style
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if (typeof values === 'function') {
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config.callback = values
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}
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} else {
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query = new NativeQuery(config, values, callback)
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if (!query.callback) {
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let resolveOut, rejectOut
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result = new this._Promise((resolve, reject) => {
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resolveOut = resolve
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rejectOut = reject
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})
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query.callback = (err, res) => err ? rejectOut(err) : resolveOut(res)
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}
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}
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if (!this._queryable) {
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query.native = this.native
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process.nextTick(() => {
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query.handleError(new Error('Client has encountered a connection error and is not queryable'))
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})
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return result
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}
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if (this._ending) {
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query.native = this.native
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process.nextTick(() => {
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query.handleError(new Error('Client was closed and is not queryable'))
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})
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return result
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}
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this._queryQueue.push(query)
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this._pulseQueryQueue()
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return result
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}
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// disconnect from the backend server
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Client.prototype.end = function (cb) {
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var self = this
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this._ending = true
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if (!this._connected) {
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this.once('connect', this.end.bind(this, cb))
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}
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var result
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if (!cb) {
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result = new this._Promise(function (resolve, reject) {
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cb = (err) => err ? reject(err) : resolve()
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})
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}
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this.native.end(function () {
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self._errorAllQueries(new Error('Connection terminated'))
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process.nextTick(() => {
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self.emit('end')
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if (cb) cb()
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})
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})
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return result
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}
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Client.prototype._hasActiveQuery = function () {
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return this._activeQuery && this._activeQuery.state !== 'error' && this._activeQuery.state !== 'end'
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}
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Client.prototype._pulseQueryQueue = function (initialConnection) {
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if (!this._connected) {
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return
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}
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if (this._hasActiveQuery()) {
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return
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}
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var query = this._queryQueue.shift()
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if (!query) {
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if (!initialConnection) {
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this.emit('drain')
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}
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return
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}
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this._activeQuery = query
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query.submit(this)
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var self = this
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query.once('_done', function () {
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self._pulseQueryQueue()
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})
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}
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// attempt to cancel an in-progress query
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Client.prototype.cancel = function (query) {
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if (this._activeQuery === query) {
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this.native.cancel(function () {})
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} else if (this._queryQueue.indexOf(query) !== -1) {
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this._queryQueue.splice(this._queryQueue.indexOf(query), 1)
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}
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}
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Client.prototype.setTypeParser = function (oid, format, parseFn) {
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return this._types.setTypeParser(oid, format, parseFn)
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}
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Client.prototype.getTypeParser = function (oid, format) {
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return this._types.getTypeParser(oid, format)
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}
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2
express-server/node_modules/pg/lib/native/index.js
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2
express-server/node_modules/pg/lib/native/index.js
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'use strict'
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module.exports = require('./client')
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160
express-server/node_modules/pg/lib/native/query.js
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Normal file
160
express-server/node_modules/pg/lib/native/query.js
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@ -0,0 +1,160 @@
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'use strict'
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/**
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* Copyright (c) 2010-2017 Brian Carlson (brian.m.carlson@gmail.com)
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* All rights reserved.
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*
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* This source code is licensed under the MIT license found in the
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* README.md file in the root directory of this source tree.
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*/
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var EventEmitter = require('events').EventEmitter
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var util = require('util')
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var utils = require('../utils')
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var NativeQuery = module.exports = function (config, values, callback) {
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EventEmitter.call(this)
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config = utils.normalizeQueryConfig(config, values, callback)
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this.text = config.text
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this.values = config.values
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this.name = config.name
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this.callback = config.callback
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this.state = 'new'
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this._arrayMode = config.rowMode === 'array'
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// if the 'row' event is listened for
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// then emit them as they come in
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// without setting singleRowMode to true
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// this has almost no meaning because libpq
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// reads all rows into memory befor returning any
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this._emitRowEvents = false
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this.on('newListener', function (event) {
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if (event === 'row') this._emitRowEvents = true
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}.bind(this))
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}
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util.inherits(NativeQuery, EventEmitter)
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var errorFieldMap = {
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'sqlState': 'code',
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'statementPosition': 'position',
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'messagePrimary': 'message',
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'context': 'where',
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'schemaName': 'schema',
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'tableName': 'table',
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'columnName': 'column',
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'dataTypeName': 'dataType',
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'constraintName': 'constraint',
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'sourceFile': 'file',
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'sourceLine': 'line',
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'sourceFunction': 'routine'
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}
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NativeQuery.prototype.handleError = function (err) {
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// copy pq error fields into the error object
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var fields = this.native.pq.resultErrorFields()
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if (fields) {
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for (var key in fields) {
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var normalizedFieldName = errorFieldMap[key] || key
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err[normalizedFieldName] = fields[key]
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}
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}
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if (this.callback) {
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this.callback(err)
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} else {
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this.emit('error', err)
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}
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this.state = 'error'
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}
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NativeQuery.prototype.then = function (onSuccess, onFailure) {
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return this._getPromise().then(onSuccess, onFailure)
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}
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NativeQuery.prototype.catch = function (callback) {
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return this._getPromise().catch(callback)
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}
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NativeQuery.prototype._getPromise = function () {
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if (this._promise) return this._promise
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this._promise = new Promise(function (resolve, reject) {
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this._once('end', resolve)
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this._once('error', reject)
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}.bind(this))
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return this._promise
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}
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NativeQuery.prototype.submit = function (client) {
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this.state = 'running'
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var self = this
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this.native = client.native
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client.native.arrayMode = this._arrayMode
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var after = function (err, rows, results) {
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client.native.arrayMode = false
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setImmediate(function () {
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self.emit('_done')
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})
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// handle possible query error
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if (err) {
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return self.handleError(err)
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}
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// emit row events for each row in the result
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if (self._emitRowEvents) {
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if (results.length > 1) {
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rows.forEach((rowOfRows, i) => {
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rowOfRows.forEach(row => {
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self.emit('row', row, results[i])
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})
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})
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} else {
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rows.forEach(function (row) {
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self.emit('row', row, results)
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})
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}
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}
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// handle successful result
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self.state = 'end'
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self.emit('end', results)
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if (self.callback) {
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self.callback(null, results)
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}
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}
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if (process.domain) {
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after = process.domain.bind(after)
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}
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// named query
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if (this.name) {
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if (this.name.length > 63) {
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console.error('Warning! Postgres only supports 63 characters for query names.')
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console.error('You supplied', this.name, '(', this.name.length, ')')
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console.error('This can cause conflicts and silent errors executing queries')
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}
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var values = (this.values || []).map(utils.prepareValue)
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// check if the client has already executed this named query
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// if so...just execute it again - skip the planning phase
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if (client.namedQueries[this.name]) {
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return client.native.execute(this.name, values, after)
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}
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// plan the named query the first time, then execute it
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return client.native.prepare(this.name, this.text, values.length, function (err) {
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if (err) return after(err)
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client.namedQueries[self.name] = true
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return self.native.execute(self.name, values, after)
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})
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} else if (this.values) {
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if (!Array.isArray(this.values)) {
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const err = new Error('Query values must be an array')
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return after(err)
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}
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var vals = this.values.map(utils.prepareValue)
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client.native.query(this.text, vals, after)
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} else {
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client.native.query(this.text, after)
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}
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}
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Block a user