nginx-cache-reader

parses nginx's cache folder and files

This is a CLI client for quickly viewing nginx cache folder information. It can read keys from the cache folder and extract the contents of it.

This can also be used as a library. See API

Prerequisites

• node >=12.x.x
• suggested that you enable strictatime for accurate atime. Read this askubuntu post for more info

Install

npm install -g nginx-cache-reader

Usage

nginx-cache-reader --help
Usage: nginx-cache-reader [options] [command]

Options:
  -v, --version                                               output the version number
  -q, --suppress-errors                                       Invalid cache files are ignored
  -h, --help                                                  display help for command

Commands:
  readfolder [options] <nginxcachefolder>                     Displays each cache file info
  readfile [options] <nginxcachefile>                         Displays cache file info
  extractfile [options] <nginxcachefile>                      Extracts body content of cache file
  extractfolder [options] <nginxcachefolder> <extractfolder>  Extracts body content of all cache files to a folder
  help [command]

API

const nginxCacheReader = require('nginx-cache-reader');

nginxCacheReader.parseFolder(nginxCacheFolder, throwError = false)

returns Promise<Array<nginxCacheReader.nginxCacheFile>>.

If one of the cache files is invalid, and throwError is false, the array element will hold {error: true, relativePath, absolutePath} instead.

nginxCacheReader.parseFile(nginxCacheFile)

returns Promise<nginxCacheReader.nginxCacheFile>

type nginxCacheReader.nginxCacheFile

{
    key, // nginx key
    statusCode, // http status code. example: 200
    headers,// http headers. example: {'content-type': 'text/html'}
    body, // stream body of cache file. example usage: body.pipe(destination)
    rawHTTPStatus, // raw http status. example: "HTTP/1.0 200 OK"
    rawHeaders, // raw headers. example: "Content-type: text/html\r\nContent-Length: 100"
    relativePath, // relative path of process.cwd(). example: path_to_cachefile
    absolutePath, // absolute path. example: /path/to/cachefile
    size, // size of cache file
    birthtime, // time of birth. taken directly from fs.statSync(cacheFile)
    mtime, // last modified time. same as above
    atime // same as above
}

API examples

Extracting body of cache file

let cacheFile = await nginxCacheReader.parseFile('path_to_cache_file');
cacheFile.body.pipe(fs.createWriteStream('extracted'));

Reading a cache folder

let cacheFolder = await nginxCacheReader.parseFolder('path_to_cache_folder');
for (let eachFile of cacheFolder) {
    if (!eachFile.error) {
      console.log('Key: ' + eachFile.key);
    }
}

Tests

npm test

• Github: @binary-person

Contributing

Contributions, issues and feature requests are welcome.

Feel free to check issues page.

Show your support

Consider giving a ⭐️ if this project helped you. Thank you.

License

MIT