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~ ACCUMULATING FURTHER CONTRIBUTIONS FROM GitHub/DMTSYS ~
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| 1.2.200 · 2023-03-29 | ||
| 1.2.217 · 2024-11-20 |
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| { | ||
| "name": "DMT", | ||
| "display": "standalone", | ||
| "icons": [ | ||
| { | ||
| "src": "appicon.png", | ||
| "type": "image/png", | ||
| "sizes": "512x512" | ||
| } | ||
| ] | ||
| } |
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| @@ -0,0 +1,4 @@ | ||
| import contentServer from './lib/fileTransport/contentServer/contentServer.js'; | ||
| import * as fiberHandle from './lib/fileTransport/fiberHandle/fiberHandle.js'; | ||
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| export { contentServer, fiberHandle }; |
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apps/dmt-search/dmt/connectome-next/lib/fileTransport/contentServer/checkPermission.js
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| import { dmtContent, scan } from 'dmt/common'; | ||
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| let permittedPaths; | ||
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| export default function checkPermission({ directory }) { | ||
| if (!permittedPaths) { | ||
| // don't load this on top because it can crash the process before logger is ready! | ||
| permittedPaths = dmtContent.defaultContentPaths().map(path => scan.absolutizePath(path)); | ||
| } | ||
| // we check case sensitive ... there may be issues on macOS because there directories ./A and ./a are the same | ||
| // make sure that on macOS you specify directory in your content.def exactly as it is on the filesystem | ||
| // in linux you are forced to do this anyway by default (there ~/a and ~/A are different directories) | ||
| return permittedPaths.find(path => directory.startsWith(path)); | ||
| } |
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...search/dmt/connectome-next/lib/fileTransport/contentServer/contentServer--full--unused.js
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| import { decode } from '../fiberHandle/encodePath.js'; | ||
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| // TODO -- implement backpressure control, read about this: | ||
| // https://nodejs.org/es/docs/guides/backpressuring-in-streams/ | ||
| // https://nodejs.org/api/stream.html#stream_stream | ||
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| // TODO: refactor this, implement DataSource -- ? | ||
| // use this abstraction when streaming search results as well ... | ||
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| function log(...args) { | ||
| console.log(...args); | ||
| } | ||
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| const sha256 = (crypto, x) => crypto.createHash('sha256').update(x, 'utf8').digest('hex'); | ||
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| // function getSHA256Function() { | ||
| // return new Promise((success, reject) => { | ||
| // import('crypto').then(crypto => { | ||
| // const sha256 = x => | ||
| // crypto | ||
| // .createHash('sha256') | ||
| // .update(x, 'utf8') | ||
| // .digest('hex'); | ||
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| // success(sha256); | ||
| // }); | ||
| // }); | ||
| // } | ||
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| function fileNotFound({ providerAddress, fileName, res, host }) { | ||
| console.log(`File not found: ${providerAddress} -- ${fileName}`); | ||
| // TODO!! won't work on localhost!! /home ... ?q ... is wrong! | ||
| let pre = ''; | ||
| if (host.startsWith('localhost')) { | ||
| pre = 'apps/search/'; | ||
| } | ||
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| res.redirect(`/${pre}?q=${fileName}&error=file_not_found`); // TODO uri encode fileName ! | ||
| //res.status(404).send(`File not found -- ${fileName}`); | ||
| } | ||
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| // source: https://github.com/archiverjs/node-archiver/blob/master/examples/express.js | ||
| function contentServer({ app, connectorPool, defaultPort, emitter }) { | ||
| log('Starting content server ...'); | ||
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| if (!defaultPort) { | ||
| throw new Error('Must provide default fiber port for content server ...'); | ||
| } | ||
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| import('crypto').then(crypto => { | ||
| import('fs').then(fs => { | ||
| import('path').then(path => { | ||
| //getSHA256Function().then(sha256 => { | ||
| app.use('/file', (req, res) => { | ||
| // if we tried fetching the content too early, should try again .... | ||
| // if (!connector.isConnected()) { | ||
| // res.end(); | ||
| // return; | ||
| // } | ||
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| const { place } = req.query; | ||
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| const { host } = req.headers; | ||
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| log(`Received content request ${place}`); | ||
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| if (place && place.includes('-')) { | ||
| const [providerAddress, _directory] = place.split('-'); | ||
| const directory = decode(_directory); | ||
| const fileName = decodeURIComponent(req.path.slice(1)); | ||
| const filePath = path.join(directory, fileName); | ||
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| if (emitter) { | ||
| // for Swarm searches we don't have this yet.... | ||
| emitter.emit('file_request', { providerAddress, filePath, host }); | ||
| } | ||
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| //log(`FILEPATH: ${filePath}`); | ||
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| // LOCAL FILE | ||
| if (providerAddress == 'localhost') { | ||
| if (fs.existsSync(filePath)) { | ||
| res.sendFile(filePath); | ||
| } else { | ||
| fileNotFound({ providerAddress, fileName, res, host }); // will this work? test | ||
| } | ||
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| return; | ||
| } | ||
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| // FILE COMING OVER ENCRYPTED FIBER | ||
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| res.status(404).send('This feature is on hold -- streaming files over encrypted fibers'); | ||
| return; | ||
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| const sessionId = sha256(crypto, Math.random().toString()); | ||
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| let ip; | ||
| let port; | ||
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| if (providerAddress.includes(':')) { | ||
| const [_ip, _port] = providerAddress.split(':'); | ||
| ip = _ip; | ||
| port = _port; | ||
| } else { | ||
| ip = providerAddress; | ||
| port = defaultPort; | ||
| } | ||
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| connectorPool | ||
| .getConnector({ address: ip, port }) | ||
| .then(connector => { | ||
| //console.log(`GOT CONNECTOR, state: ${connector.isConnected()}`); | ||
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| // prepare ws data streaming handlers | ||
| const context = { sessionId, res, connector }; | ||
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| connector.on('file_not_found', ({ sessionId }) => { | ||
| if (context.sessionId == sessionId) { | ||
| // ok? | ||
| fileNotFound({ providerAddress, fileName, res, host }); | ||
| } | ||
| }); | ||
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| // this will attach handlers multiple times!! | ||
| // check if handlers already attached!! | ||
| // we remove lingering connections but sitll, maybe it would be useful | ||
| // TODO !! | ||
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| //if(!connector.contentServerHandlersAttached) { | ||
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| const binaryStartCallback = handleBinaryStart.bind(context); | ||
| connector.on('binary_start', binaryStartCallback); | ||
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| const binaryDataCallback = handleBinaryData.bind(context); | ||
| connector.on('binary_data', binaryDataCallback); | ||
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| const binaryEndCallback = handleBinaryEnd.bind(context); | ||
| connector.on('binary_end', binaryEndCallback); | ||
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| const expandedContext = Object.assign(context, { | ||
| attachedCallbacks: { start: binaryStartCallback, data: binaryDataCallback, end: binaryEndCallback } | ||
| }); | ||
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| //const filePath = '/home/eclipse/.dmt/etc/sounds/soundtest/music.mp3'; | ||
| connector.send({ tag: 'request_file', filePath, sessionId }); | ||
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| // const msg = { action: 'request', namespace: 'content', payload: { sessionId, filePath, requestHandle: id } }; | ||
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| // connector.send(msg); // actually initiate streaming, binary data will arrive to the handleBinaryData handler | ||
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| //dropLingeringConnection.call(expandedContext); | ||
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| // TODO!! IMPLEMENT FOR TEST::: send "request_next_chunk over the wire" ... to let the server know it can send the next chunk into the connector | ||
| // | ||
| res.once('drain', () => { | ||
| log('DRAIN!!!'); | ||
| //wait | ||
| // file.on('readable', write); | ||
| // write(); | ||
| }); | ||
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| setTimeout(dropLingeringConnection.bind(expandedContext), 60 * 1000); // cancel any connection that is open for more than a minute (really extreme case but we do it to clean things up) | ||
| // this should never be required except if our binary reader didn't return all the data in this time for some reason (error, really slow connection, really big file....) | ||
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| log(`Fiber-Content /get handler with SID=${sessionId} finished, fileName=${fileName}.`); | ||
| }) | ||
| .catch(e => { | ||
| res.status(503).send(e.message); | ||
| }); | ||
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| //res.send(`${providerAddress} / ${filePath}`); | ||
| } else { | ||
| res.status(404).send('Wrong file reference format, should be [ip]-[encodedRemoteDir]'); | ||
| } | ||
| }); | ||
| }); | ||
| }); | ||
| }); | ||
| } | ||
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| function dropLingeringConnection() { | ||
| // this == expandedContext | ||
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| if (!this.finished) { | ||
| log(`Dropping lingering connection: ${this.sessionId}`); | ||
| removeListeners(this); | ||
| this.res.end(); | ||
| } | ||
| } | ||
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| function handleBinaryStart({ mimeType, fileName, contentLength, sessionId }) { | ||
| //log.yellow(`BRISI --- Growin ? Fixed... REMOVE THIS LOG LINE --- ${this.sessionId} / ${sessionId}`); | ||
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| // this == context | ||
| if (this.sessionId == sessionId) { | ||
| //log.write(`BINARY START ${sessionId}`); | ||
| this.res.set({ | ||
| 'Content-Dispositon': `attachment; filename="${encodeURIComponent(fileName)}"`, // not useful anymore, we pass filein url, as recommended: https://stackoverflow.com/a/216777 | ||
| 'Content-Type': mimeType, // do we need that now ? probably a good ida | ||
| //'Content-Type': 'application/octet-stream;', | ||
| 'Content-Length': contentLength | ||
| }); | ||
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| //this.res.setHeader('Content-Description', 'File Transfer'); | ||
| //this.res.setHeader(); | ||
| //this.res.setHeader('Content-Type', 'application/octet-stream'); | ||
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| // this.res.setHeader('Content-Dispositon', `attachment; filename="${fileName}"`); | ||
| // this.res.setHeader('Content-Type', mimeType); | ||
| } | ||
| } | ||
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| function handleBinaryData({ data, sessionId }) { | ||
| // this == context | ||
| if (this.sessionId == sessionId) { | ||
| //console.log(`BINARY DATA ${sessionId}`); | ||
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| const flushed = this.res.write(data); | ||
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| if (!flushed) { | ||
| // todo CHECK if we have to check the returned boolean and wait a bit until sending the next chunk! | ||
| // log.red( | ||
| // `Data reported not flushed after res.write -- is everything working correctly? Consider holding off until drain event is emmited... check comments in source with links how to do it!` | ||
| // ); | ||
| // https://stackoverflow.com/a/54901120 | ||
| // https://nodejs.org/api/http.html#http_response_write_chunk_encoding_callback | ||
| } else { | ||
| log('Data reported flushed!'); | ||
| log('TODO: still have to fix and optimize, see comments in code...'); | ||
| } | ||
| } | ||
| } | ||
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| function handleBinaryEnd({ sessionId }) { | ||
| // this == expandedContext | ||
| if (this.sessionId == sessionId) { | ||
| //console.log(`BINARY END ${sessionId}`); | ||
| removeListeners(this); | ||
| //console.log(this); | ||
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| this.res.end(); | ||
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| this.finished = true; // expandedContext.finished = true | ||
| } | ||
| } | ||
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| // TODO, fix:: dropLngering connections has a bug, context is not set: | ||
| // test by removing tg handlers in connector and connection will drop! | ||
| // // TODO:: fix!! -- add removeListeners back!! | ||
| //eclipse pid 632 3/23/2020, 9:16:25 PM 62914ms (+01ms) ∞ TypeError: expandedContext.connector.removeListener is not a function | ||
| // at removeListeners (file:///Users/david/.dmt/core/node/aspect-content/dmt-content/lib/contentServer.js:128:29) | ||
| // at Object.dropLingeringConnection (file:///Users/david/.dmt/core/node/aspect-content/dmt-content/lib/contentServer.js:75:5) | ||
| // at listOnTimeout (internal/timers.js:549:17) | ||
| // at processTimers (internal/timers.js:492:7) | ||
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| function removeListeners(expandedContext) { | ||
| expandedContext.connector.removeListener('binary_start', expandedContext.attachedCallbacks.start); | ||
| expandedContext.connector.removeListener('binary_data', expandedContext.attachedCallbacks.data); | ||
| expandedContext.connector.removeListener('binary_end', expandedContext.attachedCallbacks.end); | ||
| } | ||
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| export default contentServer; |
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