zippycli/lib/commands/download.mjs.map

An unofficial Zippyshare CLI

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eslint-disable import/no-default-export */\n\nimport {join as pathJoin} from 'path';\n\nimport {flags} from '@oclif/command';\nimport fse from 'fs-extra';\nimport {extract} from 'zs-extract';\n\nimport {\n\tPARTIAL_FILE_PREFIX,\n\tDEFAULT_TIMEOUT,\n\tDEFAULT_UPDATE_INTERVAL\n} from '../constants';\nimport {fstat, parseDate, pipelineP, dateHumanTimestamp} from '../util';\nimport {Progress} from '../progress';\nimport {Command} from '../command';\nimport {IRequestFactory, IRequestResponse} from '../request';\n\n/**\n * Download command.\n */\nexport class Download extends Command {\n\t/**\n\t * Aliases.\n\t */\n\tpublic static readonly aliases = ['dl', 'd'];\n\n\t/**\n\t * Description.\n\t */\n\tpublic static readonly description = 'download file from source';\n\n\t/**\n\t * Examples.\n\t */\n\tpublic static readonly examples = [];\n\n\t/**\n\t * Flags.\n\t */\n\tpublic static readonly flags = {\n\t\thelp: flags.help({char: 'h'}),\n\t\toutput: flags.string({\n\t\t\tchar: 'o',\n\t\t\tdescription: 'output file'\n\t\t}),\n\t\tdir: flags.string({\n\t\t\tchar: 'd',\n\t\t\tdescription: 'output directory'\n\t\t}),\n\t\tinput: flags.boolean({\n\t\t\tchar: 'i',\n\t\t\tdescription: 'source is input file with a URL on each line'\n\t\t}),\n\t\tmtime: flags.boolean({\n\t\t\tchar: 'm',\n\t\t\tdescription: 'use server modified time if available'\n\t\t}),\n\t\ttimeout: flags.integer({\n\t\t\tchar: 't',\n\t\t\tdescription: 'request timeout in seconds',\n\t\t\tdefault: DEFAULT_TIMEOUT\n\t\t}),\n\t\tupdate: flags.integer({\n\t\t\tchar: 'u',\n\t\t\tdescription: 'update interval in milliseconds',\n\t\t\tdefault: DEFAULT_UPDATE_INTERVAL\n\t\t})\n\t};\n\n\t/**\n\t * Arguments.\n\t */\n\tpublic static readonly args = [\n\t\t{\n\t\t\tname: 'source',\n\t\t\trequired: true,\n\t\t\tdescription: 'source to download from'\n\t\t}\n\t];\n\n\t/**\n\t * Handler.\n\t */\n\tpublic async run() {\n\t\tconst {args, flags} = this.parse(Download);\n\t\tconst source = args.source as string;\n\t\tconst {timeout, update} = flags;\n\t\tconst mtime = flags.mtime || false;\n\t\tconst outdir = flags.dir || '';\n\t\tconst file = flags.output || '';\n\t\tconst input = flags.input || false;\n\t\tif (file && input) {\n\t\t\tthrow new Error('Both file and input arguments found');\n\t\t}\n\n\t\tconst sources = flags.input\n\t\t\t? await this._readInputFile(source)\n\t\t\t: [source];\n\n\t\tconst req = this._initRequest(timeout * 1000);\n\n\t\tlet errors = false;\n\n\t\tfor (let i = 0; i < sources.length; i++) {\n\t\t\tconst source = sources[i];\n\t\t\tif (i) {\n\t\t\t\tthis.log('');\n\t\t\t}\n\n\t\t\ttry {\n\t\t\t\t// eslint-disable-next-line no-await-in-loop\n\t\t\t\tawait this._handleSource(\n\t\t\t\t\tsource,\n\t\t\t\t\toutdir,\n\t\t\t\t\tfile,\n\t\t\t\t\tmtime,\n\t\t\t\t\tupdate,\n\t\t\t\t\treq\n\t\t\t\t);\n\t\t\t} catch (err) {\n\t\t\t\terrors = true;\n\t\t\t\tthis.log(`error: ${(err as Error).toString()}`);\n\t\t\t}\n\t\t}\n\n\t\tif (errors) {\n\t\t\tthis.exit(1);\n\t\t}\n\t}\n\n\t/**\n\t * Handle an individual source.\n\t *\n\t * @param source The source.\n\t * @param outdir Output dir.\n\t * @param outfile Output files.\n\t * @param mtime Modification time.\n\t * @param updateInterval Update interval.\n\t * @param req Request factory.\n\t */\n\tprotected async _handleSource(\n\t\tsource: string,\n\t\toutdir: string,\n\t\toutfile: string,\n\t\tmtime: boolean,\n\t\tupdateInterval: number,\n\t\treq: IRequestFactory\n\t) {\n\t\tthis.log(`source: ${source}`);\n\n\t\tconst info = await extract(source, req);\n\t\tconst {download} = info;\n\t\tconst filename = outfile || info.filename;\n\n\t\tif (!filename) {\n\t\t\tthrow new Error('No filename extracted or specified');\n\t\t}\n\n\t\tthis.log(`download: ${download}`);\n\t\tthis.log(`filename: ${filename}`);\n\n\t\tif (outdir) {\n\t\t\tthis.log(`dir: ${outdir}`);\n\t\t}\n\t\tconst filepath = outdir ? pathJoin(outdir, filename) : filename;\n\n\t\t// Get file stat and size if a file.\n\t\tconst stat = await fstat(filepath);\n\n\t\t// If path already exists, and is not file, then error.\n\t\tif (stat && !stat.isFile()) {\n\t\t\tthrow new Error('Output filename already exists');\n\t\t}\n\n\t\t// Make a HEAD request to the download URL, to get file headers.\n\t\tconst headResponse = await new Promise<IRequestResponse>(\n\t\t\t(resolve, reject) => {\n\t\t\t\treq(\n\t\t\t\t\t{\n\t\t\t\t\t\turl: download,\n\t\t\t\t\t\tmethod: 'HEAD'\n\t\t\t\t\t},\n\t\t\t\t\t(err, response) => {\n\t\t\t\t\t\tif (err) {\n\t\t\t\t\t\t\treject(err);\n\t\t\t\t\t\t\treturn;\n\t\t\t\t\t\t}\n\t\t\t\t\t\tresolve(response);\n\t\t\t\t\t}\n\t\t\t\t);\n\t\t\t}\n\t\t);\n\n\t\t// Verify the status code.\n\t\tconst {statusCode} = headResponse;\n\t\tif (statusCode !== 200) {\n\t\t\tthrow new Error(`Invalid status code: ${statusCode}`);\n\t\t}\n\n\t\t// Read headers.\n\t\tconst contentLength = headResponse.headers['content-length'];\n\t\tconst acceptRanges = headResponse.headers['accept-ranges'];\n\t\tconst lastModified = headResponse.headers['last-modified'];\n\t\tthis.log(`content-length: ${contentLength}`);\n\t\tthis.log(`accept-ranges: ${acceptRanges}`);\n\t\tthis.log(`last-modified: ${lastModified}`);\n\n\t\t// Parse the content-length header.\n\t\tconst contentLengthI = parseInt(contentLength || '', 10);\n\n\t\t// If path exists and is file, verify size.\n\t\tif (stat) {\n\t\t\tif (contentLengthI || contentLengthI === 0) {\n\t\t\t\tif (contentLengthI === stat.size) {\n\t\t\t\t\tthis.log('done: Already retrieved');\n\t\t\t\t\treturn;\n\t\t\t\t}\n\t\t\t\tthrow new Error(`Invalid existing file size: ${stat.size}`);\n\t\t\t}\n\t\t\tthrow new Error('Could not verify correct file size');\n\t\t}\n\n\t\t// Determine if possible to resume any partial downloads.\n\t\tconst canResume = acceptRanges === 'bytes';\n\n\t\t// Parse the date modified.\n\t\tconst dateModified = parseDate(lastModified || '');\n\n\t\t// Create part file name.\n\t\tconst partFilename = this._partialFilename(filename);\n\t\tconst partFilepath = outdir\n\t\t\t? pathJoin(outdir, partFilename)\n\t\t\t: partFilename;\n\t\tthis.log(`filename-partial: ${partFilename}`);\n\n\t\t// Stat the part file if exists, throw if not file.\n\t\tconst partFileStat = await fstat(partFilepath);\n\t\tif (partFileStat && !partFileStat.isFile()) {\n\t\t\tthrow new Error('Partial file path exists but not a file');\n\t\t}\n\n\t\t// Get offset to resume download from if possible.\n\t\tconst resumeFrom = canResume && partFileStat ? partFileStat.size : 0;\n\t\tif (resumeFrom) {\n\t\t\tthis.log(`resume-from: ${resumeFrom}`);\n\t\t}\n\t\tif (resumeFrom > contentLengthI) {\n\t\t\tthrow new Error(`Partial larger than expected: ${resumeFrom}`);\n\t\t}\n\n\t\t// Open the file for append if resuming, else write.\n\t\tawait fse.ensureFile(partFilepath);\n\t\tconst file = fse.createWriteStream(partFilepath, {\n\t\t\tflags: resumeFrom ? 'a' : 'w'\n\t\t});\n\n\t\t// Only download if partial file is not complete.\n\t\tif (contentLengthI && resumeFrom !== contentLengthI) {\n\t\t\tthis.log(`download-start: ${dateHumanTimestamp()}`);\n\n\t\t\t// Start a progress monitor.\n\t\t\tconst progress = new Progress(contentLengthI, resumeFrom);\n\t\t\tprogress.start(updateInterval, this._transferProgressOutputInit());\n\n\t\t\t// Start download, monitoring progress.\n\t\t\tconst dl = this._download(file, download, req, resumeFrom);\n\t\t\tdl.stream.on('data', data => {\n\t\t\t\tprogress.add(data.length);\n\t\t\t});\n\n\t\t\t// Await completion.\n\t\t\ttry {\n\t\t\t\tawait dl.complete;\n\t\t\t} finally {\n\t\t\t\tprogress.end();\n\t\t\t\tthis._transferProgressOutputAfter();\n\t\t\t}\n\n\t\t\tthis.log(`download-end: ${dateHumanTimestamp()}`);\n\t\t}\n\t\t// Otherwise just close file.\n\t\telse {\n\t\t\tthis.log('already-complete: partial file already complete');\n\n\t\t\tawait new Promise(resolve => {\n\t\t\t\tfile.end(resolve);\n\t\t\t});\n\t\t}\n\n\t\tthis.log(`verify-size: ${contentLengthI}`);\n\n\t\t// Verify partial file size after download.\n\t\tconst partFileDoneStat = await fstat(partFilepath);\n\t\tif (!partFileDoneStat || !partFileDoneStat.isFile()) {\n\t\t\tthrow new Error('Failed to verify download file size');\n\t\t}\n\t\tif (partFileDoneStat.size !== contentLengthI) {\n\t\t\tconst {size} = partFileDoneStat;\n\t\t\tthrow new Error(`Unexpected download size: ${size}`);\n\t\t}\n\n\t\t// Set mtime if requested and available.\n\t\tif (dateModified && mtime) {\n\t\t\tconst time = dateModified.getTime() / 1000;\n\t\t\tthis.log(`setting-mtime: ${time}`);\n\t\t\tawait fse.utimes(partFilepath, time, time);\n\t\t}\n\n\t\t// Move partial.\n\t\tthis.log(`saving-partial: ${partFilename}`);\n\t\tawait fse.move(partFilepath, filepath);\n\n\t\t// All done.\n\t\tthis.log(`done: ${filename}`);\n\t}\n\n\t/**\n\t * Download file to a file stream.\n\t *\n\t * @param file File stream.\n\t * @param url Download URL.\n\t * @param req Request factory.\n\t * @param resume Resume offset.\n\t * @returns Stream object and a complete promise.\n\t */\n\tprotected _download(\n\t\tfile: fse.WriteStream,\n\t\turl: string,\n\t\treq: IRequestFactory,\n\t\tresume: number\n\t) {\n\t\tconst headers: {[key: string]: string} = {};\n\t\tif (resume) {\n\t\t\theaders.Range = `bytes=${resume}-`;\n\t\t}\n\t\tconst statusCodeExpected = resume ? 206 : 200;\n\n\t\tlet error: Error | null = null;\n\n\t\tconst stream = req({\n\t\t\turl,\n\t\t\theaders\n\t\t});\n\t\tstream.once('response', (response: IRequestResponse) => {\n\t\t\tconst {statusCode} = response;\n\t\t\tif (statusCode === statusCodeExpected) {\n\t\t\t\treturn;\n\t\t\t}\n\t\t\tstream.abort();\n\t\t\terror = new Error(`Invalid status code: ${statusCode}`);\n\t\t});\n\t\tconst complete = pipelineP(stream as any, file)\n\t\t\t.then(() => {\n\t\t\t\tif (error) {\n\t\t\t\t\tthrow error;\n\t\t\t\t}\n\t\t\t})\n\t\t\t.catch(err => {\n\t\t\t\tthrow error || err;\n\t\t\t});\n\n\t\treturn {\n\t\t\tstream,\n\t\t\tcomplete\n\t\t};\n\t}\n\n\t/**\n\t * Get a partial name from filename.\n\t *\n\t * @param filename The filename.\n\t * @returns Partial name.\n\t */\n\tprotected _partialFilename(filename: string) {\n\t\treturn `${PARTIAL_FILE_PREFIX}${filename}`;\n\t}\n}\nexport default Download;\n"],"file":"download.mjs","sourceRoot":"../../src"}