Исправления LimitedQueue, исправления багов, добавлена проверка флага abort

This commit is contained in:
Book Pauk
2020-01-27 18:57:42 +07:00
parent 3da6befe10
commit f8b7b8b698
4 changed files with 64 additions and 45 deletions

View File

@@ -5,7 +5,7 @@ class FileDownloader {
this.limitDownloadSize = limitDownloadSize;
}
async load(url, callback) {
async load(url, callback, abort) {
let errMes = '';
const options = {
encoding: null,
@@ -22,7 +22,9 @@ class FileDownloader {
}
let prevProg = 0;
const request = got(url, options).on('downloadProgress', progress => {
const request = got(url, options);
request.on('downloadProgress', progress => {
if (this.limitDownloadSize) {
if (progress.transferred > this.limitDownloadSize) {
errMes = 'Файл слишком большой';
@@ -39,8 +41,12 @@ class FileDownloader {
if (prog != prevProg && callback)
callback(prog);
prevProg = prog;
});
if (abort && abort()) {
errMes = 'abort';
request.cancel();
}
});
try {
return (await request).body;

View File

@@ -1,19 +1,16 @@
const cleanPeriod = 60*1000;//1 минута
const cleanTimeout = 60;//timeout в минутах (cleanPeriod)
class LimitedQueue {
constructor(enqueueAfter = 10, size = 100, timeout = cleanTimeout) {//timeout в минутах (cleanPeriod)
constructor(enqueueAfter = 10, size = 100, timeout = 60*60*1000) {//timeout в ms
this.size = size;
this.timeout = timeout;
this.abortCount = 0;
this.enqueueAfter = enqueueAfter;
this.freed = enqueueAfter;
this.listeners = [];
this.timer = setTimeout(() => { this.periodicClean(); }, cleanPeriod);
}
_addListener(listener) {
this.listeners.push(Object.assign({regTime: Date.now()}, listener));
this.listeners.push(listener);
}
//отсылаем сообщение первому ожидающему и удаляем его из списка
@@ -22,13 +19,11 @@ class LimitedQueue {
let listener = this.listeners.shift();
listener.onFree();
const now = Date.now();
for (let i = 0; i < this.listeners.length; i++) {
listener = this.listeners[i];
listener.regTime = now;
listener.onPlaceChange(i + 1);
this.listeners[i].onPlaceChange(i + 1);
}
this.resetTimeout();
}
}
@@ -42,16 +37,21 @@ class LimitedQueue {
throw new Error('Ошибка получения ресурсов в очереди ожидания');
this.freed--;
this.resetTimeout();
let returned = false;
let aCount = this.abortCount;
return {
ret: () => {
if (!returned) {
if (aCount == this.abortCount) {
this.freed++;
this._emitFree();
returned = true;
aCount = -1;
}
}
},
abort: () => {
return (aCount != this.abortCount);
},
resetTimeout: this.resetTimeout.bind(this)
};
};
@@ -80,6 +80,27 @@ class LimitedQueue {
});
}
resetTimeout() {
if (this.timer)
clearTimeout(this.timer);
this.timer = setTimeout(() => { this.clean(); }, this.timeout);
}
clean() {
this.timer = null;
if (this.freed < this.enqueueAfter) {
this.abortCount++;
//чистка listeners
for (const listener of this.listeners) {
listener.onError('Время ожидания в очереди истекло');
}
this.listeners = [];
this.freed = this.enqueueAfter;
}
}
destroy() {
if (this.timer) {
clearTimeout(this.timer);
@@ -93,28 +114,6 @@ class LimitedQueue {
this.destroyed = true;
}
periodicClean() {
try {
this.timer = null;
const now = Date.now();
//чистка listeners, убираем зависшие в очереди на одном месте
let newListeners = [];
for (const listener of this.listeners) {
if (now - listener.regTime < this.timeout*cleanPeriod - 50) {
newListeners.push(listener);
} else {
listener.onError('Время ожидания в очереди истекло');
}
}
this.listeners = newListeners;
} finally {
if (!this.destroyed) {
this.timer = setTimeout(() => { this.periodicClean(); }, cleanPeriod);
}
}
}
}
module.exports = LimitedQueue;

View File

@@ -14,7 +14,7 @@ class ConvertBase {
this.calibrePath = `${config.dataDir}/calibre/ebook-convert`;
this.sofficePath = '/usr/bin/soffice';
this.pdfToHtmlPath = '/usr/bin/pdftohtml';
this.queue = new LimitedQueue(2, 20, 3);
this.queue = new LimitedQueue(2, 20, 3*60*1000);
}
async run(data, opts) {// eslint-disable-line no-unused-vars

View File

@@ -27,7 +27,7 @@ class ReaderWorker {
this.config.tempPublicDir = `${config.publicDir}/tmp`;
fs.ensureDirSync(this.config.tempPublicDir);
this.queue = new LimitedQueue(5, 100, 3);
this.queue = new LimitedQueue(5, 100, 3*60*1000);
this.workerState = new WorkerState();
this.down = new FileDownloader(config.maxUploadFileSize);
this.decomp = new FileDecompressor(2*config.maxUploadFileSize);
@@ -56,6 +56,9 @@ class ReaderWorker {
let isUploaded = false;
let convertFilename = '';
const overLoadMes = 'Слишком большая очередь загрузки. Пожалуйста, попробуйте позже.';
const overLoadErr = new Error(overLoadMes);
let q = null;
try {
wState.set({state: 'queue', step: 1, totalSteps: 1});
@@ -67,7 +70,7 @@ class ReaderWorker {
qSize = place;
});
} catch (e) {
throw new Error('Слишком большая очередь загрузки. Пожалуйста, попробуйте позже.');
throw overLoadErr;
}
wState.set({state: 'download', step: 1, totalSteps: 3, url});
@@ -76,10 +79,11 @@ class ReaderWorker {
const tempFilename2 = utils.randomHexString(30);
const decompDirname = utils.randomHexString(30);
//download or use uploaded
if (url.indexOf('file://') != 0) {//download
const downdata = await this.down.load(url, (progress) => {
wState.set({progress});
});
}, q.abort);
downloadedFilename = `${this.config.tempDownloadDir}/${tempFilename}`;
await fs.writeFile(downloadedFilename, downdata);
@@ -92,6 +96,10 @@ class ReaderWorker {
}
wState.set({progress: 100});
if (q.abort())
throw overLoadErr;
q.resetTimeout();
//decompress
wState.set({state: 'decompress', step: 2, progress: 0});
decompDir = `${this.config.tempDownloadDir}/${decompDirname}`;
@@ -104,12 +112,16 @@ class ReaderWorker {
}
wState.set({progress: 100});
if (q.abort())
throw overLoadErr;
q.resetTimeout();
//конвертирование в fb2
wState.set({state: 'convert', step: 3, progress: 0});
convertFilename = `${this.config.tempDownloadDir}/${tempFilename2}`;
await this.bookConverter.convertToFb2(decompFiles, convertFilename, opts, progress => {
wState.set({progress});
});
}, q.abort);
//сжимаем файл в tmp, если там уже нет с тем же именем-sha256
const compFilename = await this.decomp.gzipFileIfNotExists(convertFilename, this.config.tempPublicDir);
@@ -136,6 +148,8 @@ class ReaderWorker {
} catch (e) {
log(LM_ERR, e.stack);
if (e.message == 'abort')
e.message = overLoadMes;
wState.set({state: 'error', error: e.message});
} finally {
//clean