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look for end marker across chunk boundaries

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This commit is contained in:
Brian Gough 2019-09-27 11:57:45 +01:00
parent f273a27b95
commit b0e0eeff3c
1 changed files with 10 additions and 5 deletions
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15
services/spelling/app/js/ASpellWorker.js
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@ -130,11 +130,16 @@ class ASpellWorker {
this.pipe.stdout.setEncoding('utf8') // ensure utf8 output is handled correctly
var output = ''
const endMarker = new RegExp('^[a-z][a-z]', 'm')
this.pipe.stdout.on('data', chunk => {
output = output + chunk
// We receive the language code from Aspell as the end of data marker
if (chunk.toString().match(endMarker)) {
const endMarkerRegex = new RegExp('^[a-z][a-z]', 'm')
this.pipe.stdout.on('data', data => {
// We receive the language code from Aspell as the end of data marker in
// the data. The input is a utf8 encoded string.
let oldPos = output.length
output = output + data
// The end marker may cross the end of a chunk, so we optimise the search
// using the regex lastIndex property.
endMarkerRegex.lastIndex = oldPos > 2 ? oldPos - 2 : 0
if (endMarkerRegex.test(output)) {
if (this.callback != null) {
this.callback(null, output.slice())
this.callback = null // only allow one callback in use