A NodeJS Wrapper around OpenDirectoryDownloader

This is a wrapper around KoalaBear84/OpenDirectoryDownloader, exposing functionality and output of the CLI in JavaScript.

Open Directory Downloader is a CLI tool for indexing so-called Open Directories (ODs), which are HTTP servers exposing files and folders for browsing and downloading. For more info about Open Directories visit the subreddit

Installation

npm i open-directory-downloader

Upon installation, the latest supported OpenDirectoryDownloader binary will automatically be downloaded from GitHub.
If this should fail, a local installation can be used instead (see below).

For changelogs, please look at the GitHub release page.

Usage

const odd = require(`open-directory-downloader`);

const indexer = new odd.OpenDirectoryDownloader();

indexer.scanUrl(url)
.then(scanResult => {
  console.log(scanResult)
  // {
  //   scannedUrl: 'https://example.com/files',
  //   scan: {...},
  //   jsonFile: '/full/path/to/scan/file',
  //   urlFile: '/full/path/to/url/file',
  //   reddit: '|**Url:** [https://example.com/files](https://example.com/files)||[Urls file](https://gofile.io/?c=XXXXX)|\r\n' +
  //     '|:-|-:|-:|\r\n' +
  //     '|**Extension (Top 5)**|**Files**|**Size**|\r\n' +
  //     '|.iso|70|2.2 TiB|\r\n' +
  //     '|.mkv|40|796.3 GiB|\r\n' +
  //     '|.zip|16|200.39 GiB|\r\n' +
  //     '|.rar|1|71 GiB|\r\n' +
  //     '|.mp4|1|32 GiB|\r\n' +
  //     '|**Dirs:** 188 **Ext:** 34|**Total:** 572|**Total:** 3.39 TiB|\r\n' +
  //     '|**Date (UTC):** 2021-10-17 12:13:31|**Time:** 00:00:20||\r\n',
  //   credits: "^(Created by [KoalaBear84's OpenDirectory Indexer v2.1.0.0](https://github.com/KoalaBear84/OpenDirectoryDownloader/))",
  //   missingFileSizes: false,
  //   stats: {
  //     version: '2.1.0.0',
  //     totalFiles: 572,
  //     totalSize: '3.39 TiB',
  //     totalDirectories: 188,
  //     statusCodes: { '200': 188 },
  //     totalHTTPRequests: 188,
  //     totalHTTPTraffic: '353.19 kiB',
  //     urlQueue: 0,
  //     urlThreads: 0,
  //     sizeQueue: 0,
  //     sizeThreads: 0
  //   }
  // }
}

Compatible Versions of OpenDirectoryDownloader

Wrapper Version	Supported ODD Versions (up to)	Included Version
9.0.2	v2.8.0.0+	v2.8.0.0
9.0.1	v2.5.0.1	v2.4.4.3
9.0.0	v2.4.4.3+	v2.4.4.3
8.0.2	v2.4.4.3+	v2.4.4.1
8.0.0	v2.4.4.3+	v2.3.1.4
7.0.0	2.2.0.1-2.2.0.2	2.2.0.2
6.2.0	2.1.0.8	2.1.0.8
6.1.2	2.1.0.0	2.1.0.0
6.1.0	2.1.0.0	2.1.0.0
5.1.0	2.0.0.6	2.0.0.3
5.0.0	2.0.0.2	2.0.0.0
4.0.3	1.9.6.1	1.9.6.1
4.0.2	1.9.6.1	1.9.5.5
4.0.1	1.9.6.1	1.9.4.6
4.0.0	1.9.6.1	1.9.4.6
3.1.2	1.9.6.1	1.9.4.6
3.1.1	1.9.6.1	1.9.4.5
3.1.0	1.9.6.1	1.9.4.4
3.0.0	1.9.4.3	1.9.3.9
2.0.0	1.9.4.3	1.9.3.8
1.1.0	1.9.4.3	1.9.3.6
1.0.0	1.9.3.1-1.9.3.5	1.9.3.3

Some intermediary releases might not be fully supported. It is recommended to use the versions that are included by default.

Examples

Custom Scan Options

const odd = require(`open-directory-downloader`);

const indexer = new odd.OpenDirectoryDownloader();

indexer.scanUrl(url, {
  outputFile: `/path/to/filename/without/extension`,
  keepJsonFile: true,
  keepUrlFile: true,
  parseScan: true,
  performSpeedtest: true,
  uploadUrlFile: true,
})
.then(scanResult => {
  console.log(scanResult)
})
.catch(console.error)

Live Logs & Stats

const odd = require(`open-directory-downloader`);

const indexer = new odd.OpenDirectoryDownloader({
  statsInterval: 5, // 5 seconds
});

let scan = indexer.scanUrl(url)

scan.live.on(`logs`, (newLogs) => {
  console.logs(newLogs)
})
scan.live.on(`stats`, (newStats) => {
  console.logs(newStats)
})

scan.then(scanResult => {
  console.log(scan.live.output) // access all logs after the scan is done
  console.log(scanResult)
})
.catch(console.error)
// or:
// let scanResult = await scan

Error Handling

const odd = require(`open-directory-downloader`);

const indexer = new odd.OpenDirectoryDownloader();

indexer.scanUrl(url)
.catch(err => {
  if (err instanceof odd.ODDError) {
    console.log(err.name) // 'ODDError'
  } else if (err instanceof odd.ODDWrapperError) {
    console.log(err.name) // 'WrapperError'
    console.log(err[0]) // logs the actual error
    if (err.length > 1) {
      console.log(err[1]) // logs a "best-effort" `ScanResult`, possibly with some fields (like `ScanResult.scan`) missing
    }
  }
  } else if (err instanceof odd.ODDOutOfMemoryError) {
    console.log(err.name) // 'OutOfMemoryError'
  }
})

API

Class OpenDirectoryDownloader

OpenDirectoryDownloader(options)

Constructor

• options (Object) (optional): Additional options for the scan
  • outputFile (String) (optional, defaults to the escaped URL): The name of the output file(s). Can also be a full path. Don't include an extension, as multiple files with different extensions will be generated.
  • executablePath (String) (optional) The full path to the OpenDirectoryDownloader executable.
    Allows you to use a custom OpenDirectoryDownloader binary.
  • workingDirectory (String) (optional) The full path to the directory where OpenDirectoryDownloader saves its scan files.
  • maximumMemory (Number) (optional, default is Infinity) The maximum allowed memory usage in bytes for each scan.
  • statsInterval (Number) (optional, default is 15) The minimum interval (in seconds) for refreshing the scan stats (applies to ScanResultPromise.live). ODD might output additional stats periodically, so the stats event might get emitted more often.
• Returns: An instance of OpenDirectoryDownloader

OpenDirectoryDownloader.scanUrl(url[, options])

Initiates the scan of the provided URL

• url (String or URL Object) (required): The URL to scan/index.
• options (Object) (optional): Additional options for the scan
  • outputFile (String) (optional, defaults to the escaped URL): The name of the output file(s). Can also be a full path. Don't include an extension, as multiple files with different extensions will be generated.
  • keepJsonFile (Boolean) (optional, default is false): Keep the JSON-file generated by the OpenDirectoryDownloader binary after the scan?
  • keepUrlFile (Boolean) (optional, default is false): Keep the text-file generated by the OpenDirectoryDownloader binary after the scan?
  • parseScan (Boolean) (optional, default is false): Parse the generated JSON file and include it in the ScanResult?
  • performSpeedtest (Boolean) (optional, default is false): Perform a speed test after the scan is done? (usually takes a few seconds)
    Note: For some OD formats, speed test are disabled by OpenDirectoryDownloader. For these, no test results will be included in ScanResult.scan.SpeedtestResult.
  • uploadUrlFile (Boolean) (optional, default is false): Automatically upload the file containing all the found URLs to GoFile?
  • fastScan (Boolean) (optional, default is false): Disable slow operations during the scan, like HEAD requests. This can result in file sizes being reported as "0" or "n/a", if the OD doesn't show file sizes next to the file names.
  • exactSizes (Boolean) (optional, default is false) Use HEAD requests to retrieve exact file sizes
  • userAgent (String) (optional, default is "") Use a custom user agent for all HTTP requests
  • auth (Object) (optional) Used to configure (HTTP Basic) auth settings
    • username (String) (optional, default is "") The user name to use for authentication
    • password (String) (optional, default is "") The password to use for authentication
  • headers (Object) (optional) Used to configure additional headers to be sent with each request (cookies, referrers, etc.). Headers are key-value pairs of strings. userAgent and auth will overwrite any equivalent custom headers, if provided.
  • threads (Number) (optional, default is 5) Number of threads to use for scanning
  • timeout (Number) (optional, default is 100) Number of seconds to wait before timing out
• Returns: Promise<Resolves to ScanResult | Rejects to Array<Error[,ScanResult]>>
  The promise also has a live property (see below).
  If the promise rejects, it will return an array where the first element is always an Error object and there might also be a second element, which is a ScanResult but without the ScanResult.scan property.

ScanResultPromise

The promise returned when starting a scan, resolves to ScanResult

• live An EventEmitter providing the following events:
  • EVENT logs (String) Emitted every time ODD outputs new logs, containing only the new logs (including errors)
  • EVENT stats (Object) Emitted every time ODD outputs the current scan stats.
    • version (String) the detected version of ODD
    • totalFiles (Number) the total amount of files found in the OD
    • totalSize (String) the (estimated) total size of all the files, in human-readable form
    • totalDirectories (Number) the total amount of subdirectories found in the OD
    • statusCodes (Object) an object containing status codes as keys and the number of times that status code was returned as values
    • totalHTTPRequests (Number) the total amount of HTTP requests made while scanning
    • totalHTTPTraffic (String) the total HTTP traffic generated while scanning, in human-readable form
    • urlQueue (Number) the amount of URLs that still need to be indexed
    • urlThreads (Number) the amount of threads used for indexing the remaining URLs
    • sizeQueue (Number) the amount of URLs/files for which the size still needs to be determined
    • sizeThreads (Number) the amount of threads used for determining the file sizes

The live property also has some sub-properties:

• output (String) All the logs generated by ODD during the current scan. Same properties as the object emitted by the logs event above.
• error (String) All the error logs generated by ODD during the current scan
• stats (Object) The current stats. Same properties as the object emitted by the stats event above.

ScanResult

The object returned when the promise resolves

• scannedUrl The URL that was scanned
• [scan] The parsed JSON-Object created by the OpenDirectoryDownloader binary. Can be very large depending on the size of the Open Directory.
  Only included if options.parseScan was set to true
• jsonFile The full path to the created JSON-file.
  Only included if keepJsonFile was set to true.
• urlFile The full path to the created text-file.
  Only included if keepUrlFile was set to true.
• reddit The markdown-formatted table containing the stats for the Open Directory.
  Does not include the credits.
• credits The markdown signature containing a link to KoalaBear84/OpenDirectoryDownloader
• missingFileSizes If the fastScan option is enabled and the OD doesn't list file sizes, OpenDirectoryDownloader has no way of getting the file sizes, and this boolean will be set to true.

Custom Errors

open-directory-downloader implements various custom errors to better indicate what went wrong. These errors can be used for more precise error handling, but also handled like a regular error without special treatment.

ODDError

An error indicating that the OpenDirectoryDownloader binary encountered an error.
Often indicates that the URL couldn't be scanned, because it isn't supported.

ODDOutOfMemoryError

An error indicating that the OpenDirectoryDownloader process used more memory than allowed by options.maximumMemory.

ODDWrapperError

An error indicating that the wrapper itself encountered an error.
This could happen if parsing ODD's output fails or if there are file system issues (deleted files, permission issues, etc.).