Dimitrie Stefanescu
112 lines
2.9 KiB
JavaScript
112 lines
2.9 KiB
JavaScript
'use strict'
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const zlib = require( 'zlib' )
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const Busboy = require( 'busboy' )
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const debug = require( 'debug' )
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const appRoot = require( 'app-root-path' )
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const { contextMiddleware, validateScopes, authorizeResolver } = require( `${appRoot}/modules/shared` )
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const { getObject, getObjectChildrenStream } = require( '../services/objects' )
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module.exports = ( app ) => {
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app.get( '/objects/:streamId/:objectId', contextMiddleware, async ( req, res ) => {
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if ( !req.context || !req.context.auth ) {
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return res.status( 401 ).end( )
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}
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try {
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await validateScopes( req.context.scopes, 'streams:read' )
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} catch ( err ) {
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return res.status( 401 ).end( )
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}
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try {
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await authorizeResolver( req.context.userId, req.params.streamId, 'stream:reviewer' )
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} catch ( err ) {
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return res.status( 401 ).end( )
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}
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let simpleText = req.headers.accept === 'text/plain'
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let dbStream = await getObjectChildrenStream( { objectId: req.params.objectId } )
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let currentChunkSize = 0
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let maxChunkSize = 50000
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let chunk = simpleText ? '' : [ ]
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let isFirst = true
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res.writeHead( 200, { 'Content-Encoding': 'gzip', 'Content-Type': simpleText ? 'text/plain' : 'application/json' } )
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const gzip = zlib.createGzip( )
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if ( !simpleText ) gzip.write( '[' )
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// helper func to flush the gzip buffer
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const writeBuffer = ( addTrailingComma ) => {
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// console.log( `writing buff ${currentChunkSize}` )
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if ( simpleText ) {
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gzip.write( chunk )
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} else {
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gzip.write( chunk.join( ',' ) )
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if ( addTrailingComma ){
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gzip.write( ',' )
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}
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}
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gzip.flush( )
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chunk = simpleText ? '' : [ ]
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}
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// Populate first object (the "commit")
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let obj = await getObject( { objectId: req.params.objectId } )
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var objString = JSON.stringify( obj )
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if ( simpleText ) {
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chunk += `${obj.id}\t${objString}\n`
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} else {
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chunk.push( objString )
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}
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writeBuffer( true )
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let k = 0
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dbStream.on( 'data', row => {
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let data = JSON.stringify( row.data )
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currentChunkSize += Buffer.byteLength( data, 'utf8' )
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if ( simpleText ) {
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chunk += `${row.data.id}\t${data}\n`
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} else {
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chunk.push( data )
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}
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if ( currentChunkSize >= maxChunkSize ) {
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currentChunkSize = 0
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writeBuffer( true )
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}
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k++
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} )
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dbStream.on( 'error', err => {
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debug( 'speckle:error' )( `Error in streaming object children for ${req.params.objectId}` )
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} )
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dbStream.on( 'end', ( ) => {
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if ( currentChunkSize !== 0 ) {
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writeBuffer( false )
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if ( !simpleText ) gzip.write( ']' )
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}
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gzip.end( )
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} )
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// 🚬
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gzip.pipe( res )
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} )
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// TODO: is this needed/used?
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app.get( '/objects/:streamId/:objectId/single', async ( req, res ) => {
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// TODO: authN & authZ checks
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let obj = await getObject( req.params.objectId )
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res.send( obj )
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} )
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} |