72 lines
1.8 KiB
JavaScript
72 lines
1.8 KiB
JavaScript
var CopyToQueryStream = require('./copy-to')
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module.exports = {
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to: function(txt, options) {
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return new CopyToQueryStream(txt, options)
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},
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from: function (txt, options) {
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return new CopyStreamQuery(txt, options)
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}
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}
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var Transform = require('stream').Transform
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var util = require('util')
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var code = require('./message-formats')
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var CopyStreamQuery = function(text, options) {
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Transform.call(this, options)
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this.text = text
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this._listeners = null
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this._copyOutResponse = null
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this.rowCount = 0
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}
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util.inherits(CopyStreamQuery, Transform)
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CopyStreamQuery.prototype.submit = function(connection) {
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this.connection = connection
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connection.query(this.text)
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}
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var copyDataBuffer = Buffer([code.CopyData])
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CopyStreamQuery.prototype._transform = function(chunk, enc, cb) {
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var Int32Len = 4;
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this.push(copyDataBuffer)
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var lenBuffer = Buffer(Int32Len)
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lenBuffer.writeUInt32BE(chunk.length + Int32Len, 0)
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this.push(lenBuffer)
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this.push(chunk)
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cb()
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}
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CopyStreamQuery.prototype._flush = function(cb) {
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var Int32Len = 4;
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var finBuffer = Buffer([code.CopyDone, 0, 0, 0, Int32Len])
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this.push(finBuffer)
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cb()
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}
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CopyStreamQuery.prototype.handleError = function(e) {
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this.emit('error', e)
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}
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CopyStreamQuery.prototype.handleCopyInResponse = function(connection) {
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this.pipe(connection.stream, { end: false })
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}
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CopyStreamQuery.prototype.handleCommandComplete = function(msg) {
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// Parse affected row count as in
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// https://github.com/brianc/node-postgres/blob/35e5567f86774f808c2a8518dd312b8aa3586693/lib/result.js#L37
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var match = /COPY (\d+)/.exec((msg || {}).text)
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if (match) {
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this.rowCount = parseInt(match[1], 10)
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}
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// unpipe from connection
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this.unpipe(this.connection)
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this.connection = null
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}
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CopyStreamQuery.prototype.handleReadyForQuery = function() {
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}
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