From 291803c31f829fe0d32bb3207bc11def95a7408c Mon Sep 17 00:00:00 2001 From: Nevena Bojovic Date: Tue, 1 Mar 2022 20:05:50 +0100 Subject: Urađena test aplikacija. Povezan front i back. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../node_modules/cacache/lib/content/write.js | 189 +++++++++++++++++++++ 1 file changed, 189 insertions(+) create mode 100644 sandbox/testAppNevena/Front/node_modules/cacache/lib/content/write.js (limited to 'sandbox/testAppNevena/Front/node_modules/cacache/lib/content/write.js') diff --git a/sandbox/testAppNevena/Front/node_modules/cacache/lib/content/write.js b/sandbox/testAppNevena/Front/node_modules/cacache/lib/content/write.js new file mode 100644 index 00000000..dde1bd1d --- /dev/null +++ b/sandbox/testAppNevena/Front/node_modules/cacache/lib/content/write.js @@ -0,0 +1,189 @@ +'use strict' + +const util = require('util') + +const contentPath = require('./path') +const fixOwner = require('../util/fix-owner') +const fs = require('fs') +const moveFile = require('../util/move-file') +const Minipass = require('minipass') +const Pipeline = require('minipass-pipeline') +const Flush = require('minipass-flush') +const path = require('path') +const rimraf = util.promisify(require('rimraf')) +const ssri = require('ssri') +const uniqueFilename = require('unique-filename') +const { disposer } = require('./../util/disposer') +const fsm = require('fs-minipass') + +const writeFile = util.promisify(fs.writeFile) + +module.exports = write + +function write (cache, data, opts = {}) { + const { algorithms, size, integrity } = opts + if (algorithms && algorithms.length > 1) + throw new Error('opts.algorithms only supports a single algorithm for now') + + if (typeof size === 'number' && data.length !== size) + return Promise.reject(sizeError(size, data.length)) + + const sri = ssri.fromData(data, algorithms ? { algorithms } : {}) + if (integrity && !ssri.checkData(data, integrity, opts)) + return Promise.reject(checksumError(integrity, sri)) + + return disposer(makeTmp(cache, opts), makeTmpDisposer, + (tmp) => { + return writeFile(tmp.target, data, { flag: 'wx' }) + .then(() => moveToDestination(tmp, cache, sri, opts)) + }) + .then(() => ({ integrity: sri, size: data.length })) +} + +module.exports.stream = writeStream + +// writes proxied to the 'inputStream' that is passed to the Promise +// 'end' is deferred until content is handled. +class CacacheWriteStream extends Flush { + constructor (cache, opts) { + super() + this.opts = opts + this.cache = cache + this.inputStream = new Minipass() + this.inputStream.on('error', er => this.emit('error', er)) + this.inputStream.on('drain', () => this.emit('drain')) + this.handleContentP = null + } + + write (chunk, encoding, cb) { + if (!this.handleContentP) { + this.handleContentP = handleContent( + this.inputStream, + this.cache, + this.opts + ) + } + return this.inputStream.write(chunk, encoding, cb) + } + + flush (cb) { + this.inputStream.end(() => { + if (!this.handleContentP) { + const e = new Error('Cache input stream was empty') + e.code = 'ENODATA' + // empty streams are probably emitting end right away. + // defer this one tick by rejecting a promise on it. + return Promise.reject(e).catch(cb) + } + this.handleContentP.then( + (res) => { + res.integrity && this.emit('integrity', res.integrity) + res.size !== null && this.emit('size', res.size) + cb() + }, + (er) => cb(er) + ) + }) + } +} + +function writeStream (cache, opts = {}) { + return new CacacheWriteStream(cache, opts) +} + +function handleContent (inputStream, cache, opts) { + return disposer(makeTmp(cache, opts), makeTmpDisposer, (tmp) => { + return pipeToTmp(inputStream, cache, tmp.target, opts) + .then((res) => { + return moveToDestination( + tmp, + cache, + res.integrity, + opts + ).then(() => res) + }) + }) +} + +function pipeToTmp (inputStream, cache, tmpTarget, opts) { + let integrity + let size + const hashStream = ssri.integrityStream({ + integrity: opts.integrity, + algorithms: opts.algorithms, + size: opts.size, + }) + hashStream.on('integrity', i => { + integrity = i + }) + hashStream.on('size', s => { + size = s + }) + + const outStream = new fsm.WriteStream(tmpTarget, { + flags: 'wx', + }) + + // NB: this can throw if the hashStream has a problem with + // it, and the data is fully written. but pipeToTmp is only + // called in promisory contexts where that is handled. + const pipeline = new Pipeline( + inputStream, + hashStream, + outStream + ) + + return pipeline.promise() + .then(() => ({ integrity, size })) + .catch(er => rimraf(tmpTarget).then(() => { + throw er + })) +} + +function makeTmp (cache, opts) { + const tmpTarget = uniqueFilename(path.join(cache, 'tmp'), opts.tmpPrefix) + return fixOwner.mkdirfix(cache, path.dirname(tmpTarget)).then(() => ({ + target: tmpTarget, + moved: false, + })) +} + +function makeTmpDisposer (tmp) { + if (tmp.moved) + return Promise.resolve() + + return rimraf(tmp.target) +} + +function moveToDestination (tmp, cache, sri, opts) { + const destination = contentPath(cache, sri) + const destDir = path.dirname(destination) + + return fixOwner + .mkdirfix(cache, destDir) + .then(() => { + return moveFile(tmp.target, destination) + }) + .then(() => { + tmp.moved = true + return fixOwner.chownr(cache, destination) + }) +} + +function sizeError (expected, found) { + const err = new Error(`Bad data size: expected inserted data to be ${expected} bytes, but got ${found} instead`) + err.expected = expected + err.found = found + err.code = 'EBADSIZE' + return err +} + +function checksumError (expected, found) { + const err = new Error(`Integrity check failed: + Wanted: ${expected} + Found: ${found}`) + err.code = 'EINTEGRITY' + err.expected = expected + err.found = found + return err +} -- cgit v1.2.3