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fix: update tesseract to the latest version (#1596) 

* chore: update tesseract to the latest version

* fix stuff

* fix delay

* fix caching, fixes #1457
This commit is contained in:
Nolan Lawson 2019-10-22 20:45:30 -07:00 committed by GitHub
parent 1d257ed92e
commit 2a248cb482
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GPG Key ID: 4AEE18F83AFDEB23
6 changed files with 81 additions and 79 deletions
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4
package.json
View File

@ -103,8 +103,8 @@
"svelte-transitions": "^1.2.0",
"svgo": "^1.3.0",
"terser-webpack-plugin": "^2.1.3",
"tesseract.js": "^2.0.0-alpha.13",
"tesseract.js-core": "^2.0.0-beta.10",
"tesseract.js": "^2.0.0-beta.1",
"tesseract.js-core": "^2.0.0-beta.13",
"text-encoding": "^0.7.0",
"tiny-queue": "^0.2.1",
"webpack": "^4.41.2",

7
src/routes/_database/databaseLifecycle.js
View File

@ -3,6 +3,8 @@ import { addKnownInstance, deleteKnownInstance } from './knownInstances'
import { migrations } from './migrations'
import { clearAllCaches } from './cache'
import { lifecycle } from '../_utils/lifecycle'
import { scheduleIdleTask } from '../_utils/scheduleIdleTask'
import { del } from '../_thirdparty/idb-keyval/idb-keyval'
const openReqs = {}
const databaseCache = {}
@ -98,4 +100,9 @@ if (process.browser) {
})
}
})
// Clean up files that Tesseract.js may have stored. Originally we allowed it to store
// stuff in IDB, but now we don't.
// TODO: we can remove this after it's been deployed for a while
scheduleIdleTask(() => del('./eng.traineddata'))
}

39
src/routes/_utils/runTesseract.js
View File

@ -17,6 +17,9 @@ let destroyWorkerHandle
async function initWorker () {
if (!worker) {
worker = (await importTesseractWorker())()
await worker.load()
await worker.loadLanguage('eng')
await worker.initialize('eng')
}
}
@ -51,32 +54,30 @@ function getTotalProgress (progressInfo) {
return total
}
function recognize (url, onProgress) {
// TODO: have to trick tesseract into not creating a blob URL because that would break our CSP
// see https://github.com/naptha/tesseract.js/pull/322
let promise
const OldBlob = window.Blob
window.Blob = null
try {
promise = worker.recognize(url)
} finally {
window.Blob = OldBlob
}
promise.progress(progressInfo => {
console.log('progress', progressInfo)
if (onProgress && steps.find(({ status }) => status === progressInfo.status)) {
onProgress(getTotalProgress(progressInfo))
async function recognize (url, onProgress) {
// TODO: it seems hacky that we have to spy on the tesseract worker to figure out its progress
const listener = event => {
const { data } = event
if (onProgress && data.status === 'progress' && steps.find(({ status }) => status === data.data.status)) {
onProgress(getTotalProgress(data.data))
}
})
return promise
}
worker.worker.addEventListener('message', listener)
try {
const res = await worker.recognize(url, 'eng')
return res
} finally {
worker.worker.removeEventListener('message', listener)
}
}
export async function runTesseract (url, onProgress) {
cancelDestroyWorker()
await initWorker()
try {
const { text } = await recognize(url, onProgress)
return text
const res = await recognize(url, onProgress)
console.log('result', res)
return res.data.text
} finally {
scheduleDestroyWorker()
}

20
src/routes/_utils/tesseractWorker.js
View File

@ -1,20 +1,20 @@
import workerPath from 'tesseract.js/dist/worker.min.js'
// TODO: we should use .wasm instead of .wasm.js. But currently can't because:
// 1. not supported https://github.com/naptha/tesseract.js/blob/9f1e782/docs/local-installation.md#corepath
// 1. not supported https://github.com/naptha/tesseract.js/issues/282#issuecomment-492263336
// 2. webpack defaultRules issues (fixable with https://github.com/webpack/webpack/issues/8412#issuecomment-445586591)
// We should explore this at a later date.
import corePath from 'tesseract.js-core/tesseract-core.wasm.js'
import { TesseractWorker } from 'tesseract.js'
import workerPath from 'tesseract.js/dist/worker.min.js'
import { createWorker } from 'tesseract.js'
// tesseract has a bug where broken image URLs will silently fail. We could spawn a new worker
// every time to work around the issue, but then it literally spawns a new web worker for each request,
// which seems excessive. So we just live with the bug for now.
// https://github.com/naptha/tesseract.js/issues/325
const { origin } = location
export default () => new TesseractWorker({
export default () => createWorker({
workerPath: `${origin}/${workerPath}`,
langPath: `${origin}/`,
corePath: `${origin}/${corePath}`
corePath: `${origin}/${corePath}`,
cacheMethod: 'none', // this file is 23.4MB ungzipped, so store in service worker instead (11MB gzipped)
workerBlobURL: false,
logger: message => {
console.log(message)
}
})

30
src/service-worker.js
View File

@ -13,6 +13,17 @@ const timestamp = process.env.SAPPER_TIMESTAMP
const ASSETS = `assets_${timestamp}`
const WEBPACK_ASSETS = `webpack_assets_${timestamp}`
const ON_DEMAND_CACHE = [
{
regex: /tesseract-core\.wasm/,
cache: WEBPACK_ASSETS
},
{
regex: /traineddata\.gz/,
cache: ASSETS
}
]
const isSafari = /Safari/.test(navigator.userAgent) && !/Chrom/.test(navigator.userAgent)
// `static` is an array of everything in the `static` directory
@ -20,7 +31,7 @@ const assets = __assets__
.map(file => file.startsWith('/') ? file : `/${file}`)
.filter(filename => !filename.endsWith('.map'))
.filter(filename => filename !== '/robots.txt')
.filter(filename => !filename.includes('traineddata.gz')) // Tesseract already caches it in IDB
.filter(filename => !filename.includes('traineddata.gz')) // cache on-demand
.filter(filename => !filename.endsWith('.webapp')) // KaiOS manifest
// `shell` is an array of all the files generated by webpack
@ -124,14 +135,17 @@ self.addEventListener('fetch', event => {
return response
}
if (/tesseract-core\.wasm/.test(url.pathname)) {
// cache this on-demand
const response = await fetch(req)
if (response && response.status >= 200 && response.status < 300) {
const clonedResponse = response.clone()
/* no await */ caches.open(WEBPACK_ASSETS).then(cache => cache.put(req, clonedResponse))
for (const { regex, cache } of ON_DEMAND_CACHE) {
if (regex.test(url.pathname)) {
// cache this on-demand
const response = await fetch(req)
if (response && response.status >= 200 && response.status < 300) {
const clonedResponse = response.clone()
/* no await */
caches.open(cache).then(cache => cache.put(req, clonedResponse))
}
return response
}
return response
}
// for routes, serve the /service-worker-index.html file from the most recent

60
yarn.lock
View File

@ -2487,11 +2487,6 @@ check-error@^1.0.2:
resolved "https://registry.yarnpkg.com/check-error/-/check-error-1.0.2.tgz#574d312edd88bb5dd8912e9286dd6c0aed4aac82"
integrity sha1-V00xLt2Iu13YkS6Sht1sCu1KrII=
check-types@^7.4.0:
version "7.4.0"
resolved "https://registry.yarnpkg.com/check-types/-/check-types-7.4.0.tgz#0378ec1b9616ec71f774931a3c6516fad8c152f4"
integrity sha512-YbulWHdfP99UfZ73NcUDlNJhEIDgm9Doq9GhpyXbF+7Aegi3CVV7qqMCKTTqJxlvEvnQBp9IA+dxsGN6xK/nSg==
check-types@^8.0.3:
version "8.0.3"
resolved "https://registry.yarnpkg.com/check-types/-/check-types-8.0.3.tgz#3356cca19c889544f2d7a95ed49ce508a0ecf552"
@ -3993,10 +3988,10 @@ file-loader@^4.2.0:
loader-utils "^1.2.3"
schema-utils "^2.0.0"
file-type@^10.5.0:
version "10.11.0"
resolved "https://registry.yarnpkg.com/file-type/-/file-type-10.11.0.tgz#2961d09e4675b9fb9a3ee6b69e9cd23f43fd1890"
integrity sha512-uzk64HRpUZyTGZtVuvrjP0FYxzQrBf4rojot6J65YMEbwBLB0CWm0CLojVpwpmFmxcE/lkvYICgfcGozbBq6rw==
file-type@^12.3.0:
version "12.3.0"
resolved "https://registry.yarnpkg.com/file-type/-/file-type-12.3.0.tgz#74d755e5dc9c5cbc7ee6f182529b453906ac88c2"
integrity sha512-4E4Esq9KLwjYCY32E7qSmd0h7LefcniZHX+XcdJ4Wfx1uGJX7QCigiqw/U0yT7WOslm28yhxl87DJ0wHYv0RAA==
"filereader@>= 0.10.3", filereader@^0.10.3:
version "0.10.3"
@ -4652,7 +4647,7 @@ icss-utils@^4.0.0, icss-utils@^4.1.1:
dependencies:
postcss "^7.0.14"
idb-keyval@^3.1.0:
idb-keyval@^3.2.0:
version "3.2.0"
resolved "https://registry.yarnpkg.com/idb-keyval/-/idb-keyval-3.2.0.tgz#cbbf354deb5684b6cdc84376294fc05932845bd6"
integrity sha512-slx8Q6oywCCSfKgPgL0sEsXtPVnSbTLWpyiDcu6msHOyKOLari1TD1qocXVCft80umnkk3/Qqh3lwoFt8T/BPQ==
@ -5080,11 +5075,6 @@ is-url@1.2.2:
resolved "https://registry.yarnpkg.com/is-url/-/is-url-1.2.2.tgz#498905a593bf47cc2d9e7f738372bbf7696c7f26"
integrity sha1-SYkFpZO/R8wtnn9zg3K792lsfyY=
is-url@^1.2.4:
version "1.2.4"
resolved "https://registry.yarnpkg.com/is-url/-/is-url-1.2.4.tgz#04a4df46d28c4cff3d73d01ff06abeb318a1aa52"
integrity sha512-ITvGim8FhRiYe4IQ5uHSkj7pVaPDrCTkNd3yq3cV7iZAcJdHTUMPMEHcqSOy9xZ9qFenQCvi+2wjH9a1nXqHww==
is-utf8@^0.2.0:
version "0.2.1"
resolved "https://registry.yarnpkg.com/is-utf8/-/is-utf8-0.2.1.tgz#4b0da1442104d1b336340e80797e865cf39f7d72"
@ -5909,7 +5899,7 @@ node-environment-flags@1.0.5:
object.getownpropertydescriptors "^2.0.3"
semver "^5.7.0"
node-fetch@^2.3.0, node-fetch@^2.6.0:
node-fetch@^2.6.0:
version "2.6.0"
resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.0.tgz#e633456386d4aa55863f676a7ab0daa8fdecb0fd"
integrity sha512-8dG4H5ujfvFiqDmVu9fQ5bOHUC15JMjMY/Zumv26oOvvVJjM67KF8koCWIabKQ1GJIa9r2mMZscBq/TbdOcmNA==
@ -7054,7 +7044,7 @@ regenerator-runtime@^0.11.0:
resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.11.1.tgz#be05ad7f9bf7d22e056f9726cee5017fbf19e2e9"
integrity sha512-MguG95oij0fC3QV3URf4V2SDYGJhJnJGqvIIgdECeODCT98wSWDAJ94SSuVpYQUoTcGUIL6L4yNB7j1DFFHSBg==
regenerator-runtime@^0.13.2:
regenerator-runtime@^0.13.2, regenerator-runtime@^0.13.3:
version "0.13.3"
resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.13.3.tgz#7cf6a77d8f5c6f60eb73c5fc1955b2ceb01e6bf5"
integrity sha512-naKIZz2GQ8JWh///G7L3X6LaQUAMp2lvb1rvwwsURe/VXwD6VMfr+/1NuNw3ag8v2kY1aQ/go5SNn79O9JU7yw==
@ -8153,36 +8143,26 @@ terser@^4.3.8:
source-map "~0.6.1"
source-map-support "~0.5.12"
tesseract.js-core@^2.0.0-beta.10, tesseract.js-core@^2.0.0-beta.11:
version "2.0.0-beta.11"
resolved "https://registry.yarnpkg.com/tesseract.js-core/-/tesseract.js-core-2.0.0-beta.11.tgz#c35e3e689efad30138603977ad7eaaac44c7fd37"
integrity sha512-07haKH2JYYo0OfIJoioMS9dDiI5Hrl7+r1MqjeNAAT5WpKO0ATe4cpncC8s1kz0e3s1kaC5WOwL3YJcjbJE+hg==
tesseract.js-core@^2.0.0-beta.13:
version "2.0.0-beta.13"
resolved "https://registry.yarnpkg.com/tesseract.js-core/-/tesseract.js-core-2.0.0-beta.13.tgz#a21d798e88098898a9bdd935d0553215e03274f8"
integrity sha512-GboWV/aV5h+Whito6L6Q3WCFZ2+lgxZGgjY84wSpWbTLEkkZgHsU+dz1or+3rWSABH/nuzHDco1bZRk5+f94mw==
tesseract.js-utils@^1.0.0-beta.8:
version "1.0.0-beta.8"
resolved "https://registry.yarnpkg.com/tesseract.js-utils/-/tesseract.js-utils-1.0.0-beta.8.tgz#d1ef25c12609a337c3e0ac12a33f9903f3145a68"
integrity sha512-qjHBfWfzo2o1ZY9XI0Wh2hmpp38+mIgCMOk60W5Yyie/pBl421VLBKOZUEwQgpbLnOJ24VU6Q8yXsVgtFFHcFg==
tesseract.js@^2.0.0-beta.1:
version "2.0.0-beta.1"
resolved "https://registry.yarnpkg.com/tesseract.js/-/tesseract.js-2.0.0-beta.1.tgz#6729350abe60895db5478c739b1863a39524d970"
integrity sha512-PPELe7ArJycS1ZZomecL4+MG5SCin0uHxzRhLecxGxp00Ec6rEYx9p6LwzJjyORgUlDkocP6jgb/Rczqv3DTkQ==
dependencies:
axios "^0.18.0"
bmp-js "^0.1.0"
file-type "^10.5.0"
idb-keyval "^3.1.0"
is-url "^1.2.4"
zlibjs "^0.3.1"
tesseract.js@^2.0.0-alpha.13:
version "2.0.0-alpha.15"
resolved "https://registry.yarnpkg.com/tesseract.js/-/tesseract.js-2.0.0-alpha.15.tgz#9887f4d1c10e25bb098fde7a10580c865c362fad"
integrity sha512-qM1XUFVlTO+tx6oVRpd9QQ8PwQLxo3qhbfIHByUlUVIqWx6y/U9xlHIaG033/Tjfs2EQ0NAehPTOJ+eNElsXEg==
dependencies:
axios "^0.18.0"
check-types "^7.4.0"
file-type "^12.3.0"
idb-keyval "^3.2.0"
is-url "1.2.2"
node-fetch "^2.3.0"
opencollective-postinstall "^2.0.2"
regenerator-runtime "^0.13.3"
resolve-url "^0.2.1"
tesseract.js-core "^2.0.0-beta.11"
tesseract.js-utils "^1.0.0-beta.8"
tesseract.js-core "^2.0.0-beta.13"
zlibjs "^0.3.1"
testcafe-browser-tools@1.6.8:
version "1.6.8"