Extract covers from .cbz and .cbr

[rishighan]

Hello,

Do you have a module that you use to unrar or unzip .cbr and .cbz files to extract the covers from the archives?
I think I saw a demo of your application, where you are displaying thumbnails and was wondering where in the code that resides?

[bluelovers]

https://github.com/Stuk/jszip

[rishighan]

This seems to be for the browser, what I'm trying to do is: extract the first file from the cbr or the cbz. The problem I'm running into is that the sort order of the archive is incorrect and I get a random page as the cover.

Is there a way to ensure that the files in the archive maintain the sort order after extraction?

Do you have any pointers on how I solve it? This is my code so far:

https://github.com/rishighan/threetwo-import-service/blob/a3d07d62c8be0c36fef9884821c852de81c804f5/utils/uncompression.utils.ts#L85

[bluelovers]

i can't found any info for how to get cover from cbr meta

but u can use ebook-meta

ebook-meta is form Calibre

return crossSpawn('ebook-meta', [
		`--get-cover=${outputFile}`,
		target,
	], options.spawnOptions)

[rishighan]

What uncompression libraries do you use in your projects for rar and zip files?

[bluelovers]

i only use jszip for zip

i didn't use rar in js

and ebook-meta can handle all comic book cover

[rishighan]

Is it an npm module?

[bluelovers]

when u install https://calibre-ebook.com/

u will have ebook-meta, this exists in calibre install path

[rishighan]

Is it available as part of ws-calibre ?

[rishighan]

Alright, found https://github.com/bluelovers/node-calibre and I am wondering if I need to create a calibre library out of my comics? I am on macOS, so I can install calibre using brew, that part is solved.

So the correct flow for me is:

1. Get the calibre package and install it on my host OS
2. Install https://github.com/bluelovers/node-calibre
3. Create a library?
4. Iterate over library and get covers?

[rishighan]

Think I got a little further, using the following:

export const getCoversFromFile = async () => {
	try {
		const calibre = new Calibre({
			library: path.resolve("userdata/calibre-lib"),
		});

		let result: string;
		result = await calibre.run("ebook-meta", [
			`--get-cover=${path.resolve(
				"comics/A Hypothetical Lizard (2004)/Hypothetical_Lizard_T01.cbr"
			)}`,
			path.resolve("userdata/covers/shoo/"),
		]);
		console.log("AJSDASDLASDASDASLK!@#!@#!@#!#@#!@#!@", result);
	} catch (error) {
		console.log(error);
	}
};

I get:

{ Error: Command failed: ebook-meta "--get-cover=/Users/rishi/work/threetwo-import-service/comics/A Hypothetical Lizard (2004)/Hypothetical_Lizard_T01.cbr" "/Users/rishi/work/threetwo-import-service/userdata/covers/shoo/jp.jpg"
Traceback (most recent call last):
  File "runpy.py", line 194, in _run_module_as_main
  File "runpy.py", line 87, in _run_code
  File "site.py", line 39, in <module>
  File "site.py", line 35, in main
  File "calibre/ebooks/metadata/cli.py", line 182, in main
FileNotFoundError: [Errno 2] No such file or directory: '/Users/rishi/work/threetwo-import-service/userdata/covers/shoo/jp.jpg'

    at ChildProcess.exithandler (child_process.js:294:12)
    at ChildProcess.emit (events.js:198:13)
    at ChildProcess.EventEmitter.emit (domain.js:448:20)
    at maybeClose (internal/child_process.js:982:16)
    at Socket.stream.socket.on (internal/child_process.js:389:11)
    at Socket.emit (events.js:198:13)
    at Socket.EventEmitter.emit (domain.js:448:20)
    at Pipe._handle.close (net.js:606:12)
  killed: false,
  code: 1,
  signal: null,
  cmd:
   'ebook-meta "--get-cover=/Users/rishi/work/threetwo-import-service/comics/A Hypothetical Lizard (2004)/Hypothetical_Lizard_T01.cbr" "/Users/rishi/work/threetwo-import-service/userdata/covers/shoo/jp.jpg"' }

[rishighan]

Finally got it!

This is how:

let result: string;
result = await calibre.run(
  "ebook-meta",
  [path.resolve("comics/Aliens - Salvation (1993) Mignola.cbz")],
  {
    getCover: path.resolve("userdata/covers/shoo/p.jpg"),
  }
);

Per usual, thanks so much for your help!