nude crawler

Nude crawler crawls all pages on telegra.ph for today and N past days for specific words, checks number of nude, non-nude images, videos (not analysed) and reports pages which looks interesting (e.g. has more then 10 nude images, or has one video)

Ineffective intriguing warning

No matter how old you are, no matter how tolerant you are, no matter what your sexual orientation is, no matter what your favorite perversion is, no matter how big your sexual horizons are, with NudeCrawler you will find a lot of things that you will NOT like.

I wrote this warning because I have seen some shit. LITERALLY.

Please use it only for legal and ethical purposes. And it's 18+ surely.

Install

Recommended (and most secure) way is using docker:

mkdir /tmp/run
sudo docker run --rm -v /tmp/run:/work yaroslaff/nudecrawler nudecrawler -a Eva "Sasha Grey" "Belle Delphine" Amouranth

See below how to refine your searching and filtering.

Alternative install

pipx install nudecrawler

or, install right from git repo:

pipx install git+https://github.com/yaroslaff/nudecrawler

on old Linux without pipx, you may use pip3 (and better to install in virtualenv).

Launch Nude Crawler!

(I intentionally changed links in results, do not want to violate github policy)

$ nudecrawler sasha-grey
INTERESTING https://telegra.ph/sasha-grey-XXXXXXXX
  Nude: 0 non-nude: 0
  Total video: 1

INTERESTING https://telegra.ph/sasha-grey-XXXXX
  Nude: 9 non-nude: 6

INTERESTING https://telegra.ph/sasha-grey-XXXXX
  Nude: 9 non-nude: 6

INTERESTING https://telegra.ph/sasha-grey-XXXXX
  Nude: 6 non-nude: 3

By default, built-in NudeNet detection (--detect nudenetb) is used (but nudecrawler has open architecture, natively supports few other detectors and you can easily connect it to any other detectors).

For very impatient, add -a (skip nudity detection, print all found pages) and -v (verbose) options to skip detections.

Config file

Most of nudecrawler options could be configured from config file nudecrawler.toml. Nudecrawler looks for config file in following locations (first found file is used):

NUDECRAWLER_CONFIG environment variable or -c / --config option
/work/nudecrawler.toml (This used when working inside docker contaner and host directory mounted as /work)
nudecrawler.toml in current working directory
~/nudecrawler.toml
/etc/nudecrawler.toml

options given in command line has higher priority.

Advanced usage

How to get only most interesting results

Nudecrawler uses evalidate to filter results with python expression (--expr). With -h help will list all avaliable variables, like: total_images, nude_images, nonnude_images, new_nude_images, new_nonnude_images, new_total_images, total_video. new_ variables are about new images (not found in cache). e.g. --expr 'total_images>20 and new_nude_images>5' will print only pages with more then 20 images and 5 nude images (not found in cache). This is good method to skip pages with duplicated content.

Default value: nude_images > 0.

Use -a/--all to get some results ASAP (but later you may want to make some filtering)

Consider using --days, --total to narrow/wider search.

How to search faster

How to search faster: use cache

Nudecrawler use very simple cache in JSON format (with two mappings: image url to SHA1 hash of image, and hash to verdict). Sometimes this can speed-up searching greatly, because often some pages are very similar to each other and we can reuse verdict from cache, not doing heavy AI analysis of image and sometimes not even downloading image.

config section

[cache]
# Path to cache file
cache = "/tmp/nccache.json"
cache-save = 1

cache-save is how often we should save in-memory cache to file. With 1 it will be saved after each new file is added to cache. Set it to higher value like 100 or 1000 for very long runs, because saving big cache is slow.

How to search faster: use prefiltering for images

To speed-up processing, nudecrawler uses pre-filtering, HTTP HEAD request is performed for any image, and further processing is performed only if images passes basic check:

Image URL must return status 200
If server responds with Content-Length in response headers (telegra.ph uses Content-Length), it must be more then --minsize (minsize specified in Kb, and default value is 10Kb). This saves us from downloading/filtering icons or other very small images.

How to search faster: discard useless pages before analysis

Use argument --total N (section [filter], option total) to analyse only pages which has more then N images (images discarded on pre-filtered stage do not count). So, if total is 20, images which has less then 20 big images will be discarded quickly.

--max-pictures (section [filter], option max-pictures) will analyse only first N prefiltered images. So, if page has 1000 images, but max-pictures is 10, only first 10 images will be analysed. (and variables like nude_images will never be higher then N)

--max-errors (section [filter], option max-errors) limits number of errors on page (like broken image links), if N errors happened, page is discarded and not processed further.

--min-content-length (section [filter], option max-content-length) skips pages with too small content-length.

How to search very fast (without detection)

If you want just to find existing pages in telegra.ph (and do not want to detect nudity on images there or any other filtering) you can use nudecrawler-makeurls utility in combination with bulk-http-check

 $ time nudecrawler-makeurls "sasha grey" -c 10 | bulk-http-check -n 100 |grep "200$"
https://telegra.ph/sasha-grey-01-12 OK 200
https://telegra.ph/sasha-grey-01-14 OK 200
...
https://telegra.ph/sasha-grey-12-12 OK 200

real	0m5.089s
user	0m1.079s
sys	0m0.444s

5 seconds to find all (61) telegra.ph pages with title "Sasha Grey".

Long-time run

Stop/Resume

When working with worklists an --stats file, current status is periodically saved to this file. If you need to resume it, just use command nudecrawler --resume PATH/TO/stats.json

Memory leaking in containers (if using detectors in docker containers)

You may check container memory usage with sudo docker stats or sudo docker stats --no-stream. Often containers consume more and more memory with time, leading to out-of-memory in the end. To prevent this problem use combination of --stop and --refresh like --stop 1000 --refresh refresh-nsfw-api.sh this will call refresh script every 1000 images. Refresh script should stop current container and start it again. See source of refresh-nsfw-api.sh for example, it's very simple. This shell script is not installed when you install nudecrawler python package.

Benchmarking/test

Tested on same page, different technologies (default thresholds) gives different results. Page A: belle delphine from 16th Jan (64 lite sexy images, mostly underwear, nude breast on few) Page B: sasha grey from 18 Apr (16 images, 12 clearly nsfw, 4 are clearly safe )

| filtering technology | A time | A nudes | B time | B nudes | |--- |--- | -- |--- |--- | |:nude (bilt-in) | 127s | 63 | 34s | 14 (false positives/negatives) | |detect-image-nsfw_api (docker) | 90s | 49 | 23s | 12 | |detect-image-aid (docker) | 124s | 10 | 28s | 6 (false negatives) | |detect-image-nudenet (scripts) | 90s | 57 | 24s | 12 |

Working with wordlists

While you can run nudecrawler to search few words like nudecrawler "sasha grey" "Belle Delphine" Amouranth, you may want to run it for long time with very long wordlist from file.

In simplest case (not so big wordlist), just use -w, like:

# verbose, no-filtering (report all pages), use wordlist
nudecrawler -v -a -w wordlist.txt

If you have very large wordlist, better to pre-check it with faster tool like bulk-http-check, it's much faster, doing simple check (we need only filter-out 200 vs 404 pages) millions of page per hour on smallest VPS server.

Convert wordlist to urllist

# only generate URLs 
nudecrawler-makeurls -w wordlist.txt > urls.txt

Verify it with bulk-http-check and get output file with this format:

https://telegra.ph/abazhurah-02-26 OK 404
https://telegra.ph/ab-03-01 OK 200
https://telegra.ph/aaronov-02-22 OK 404
https://telegra.ph/abazhurami-02-25 OK 404

Filter it, to leave only existing pages, and strip date from it:

grep "OK 200" .local/urls-status.log | cut -f 1 -d" "| sed 's/-[0-9]\+-[0-9]\+$//g' | sort | uniq > .local/urs.txt

List (urls.txt) will look like:

https://telegra.ph/
https://telegra.ph/a
https://telegra.ph/ab
https://telegra.ph/aba
https://telegra.ph/Abakan
....

This list (~300Kb, 11k urls) created from 1.5M words russian wordlist. There are only words which had at least one page with this title for last 10 days. So it has words 'Анжелика' or 'Анфиса' (beautiful woman names), but has no words 'Абажурами' or 'Абажуродержателем' (Because there are no pages with these titles on telegra.ph).

Now you can use this file as wordlist (nudecrawler will detect it's already base URL, and will only append date to URL).

Nudecrawler

Install / Use

README