linkinspector

linkinspector is a command-line tool that analyzes URLs to retrieve HTTP status codes, content lengths, and content types. It features color-coded output, passive checks for specific file extensions, and supports input from stdin or files.

Installation

go install github.com/rix4uni/linkinspector@latest

Download prebuilt binaries

wget https://github.com/rix4uni/linkinspector/releases/download/v0.0.4/linkinspector-linux-amd64-0.0.4.tgz
tar -xvzf linkinspector-linux-amd64-0.0.4.tgz
rm -rf linkinspector-linux-amd64-0.0.4.tgz
mv linkinspector ~/go/bin/linkinspector

Or download binary release for your platform.

Compile from source

git clone --depth 1 github.com/rix4uni/linkinspector.git
cd linkinspector; go install

Usage

linkinspector is a command-line tool that analyzes URLs to retrieve HTTP status codes, content lengths, and content types.

Usage:
  linkinspector [flags]

Flags:
INPUT:
   -u, -target string  Single URL to check
   -l, -list string    File containing list of URLs to check

PROBES:
   -passive  Enable passive mode to skip requests for specific extensions

MATCHERS:
   -mc, -match-code string    Match response with specified status code (e.g., -mc 200,302)
   -ml, -match-length string  Match response with specified content length (e.g., -ml 100,102)
   -mt, -match-type string    Match response with specified content type (e.g., -mt "application/octet-stream,text/html")
   -ms, -match-suffix string  Match response with specified suffix name (e.g., -ms "ZIP,PHP,7Z")

OUTPUT:
   -o, -output string     File to write output results
   -append-output string  File to append output results instead of overwriting
   -json                  Output in JSON format
   -json-type string      Output in JSON type, MarshalIndent or Marshal (default "MarshalIndent")

RATE-LIMIT:
   -t, -threads int  Number of threads to use (default 50)

CONFIGURATIONS:
   -H string  Custom User-Agent header for HTTP requests (default "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36")

DEBUG:
   -verbose  Enable verbose output for debugging purposes
   -version  Print the version of the tool and exit
   -silent   silent mode
   -nc, -no-color  disable colors in cli output

OPTIMIZATIONS:
   -timeout int  HTTP request timeout duration (in seconds) (default 10)
   -insecure     Disable TLS certificate verification
   -delay value  Duration between each HTTP request (e.g., 200ms, 1s) (default -1ns)

Usage Examples

Single URL

┌──(root㉿kali)-[/root/linkinspector]
└─# echo "https://linkinspector.netlify.app/nuclei-templates.zip" | linkinspector

Multiple URLs

┌──(root㉿kali)-[/root/linkinspector]
└─# cat urls.txt | linkinspector

Supported types

Image

• jpg - image/jpeg
• png - image/png
• gif - image/gif
• webp - image/webp
• cr2 - image/x-canon-cr2
• tif - image/tiff
• bmp - image/bmp
• heif - image/heif
• jxr - image/vnd.ms-photo
• psd - image/vnd.adobe.photoshop
• ico - image/vnd.microsoft.icon
• dwg - image/vnd.dwg
• avif - image/avif

Video

• mp4 - video/mp4
• m4v - video/x-m4v
• mkv - video/x-matroska
• webm - video/webm
• mov - video/quicktime
• avi - video/x-msvideo
• wmv - video/x-ms-wmv
• mpg - video/mpeg
• flv - video/x-flv
• 3gp - video/3gpp

Audio

• mid - audio/midi
• mp3 - audio/mpeg
• m4a - audio/mp4
• ogg - audio/ogg
• flac - audio/x-flac
• wav - audio/x-wav
• amr - audio/amr
• aac - audio/aac
• aiff - audio/x-aiff

Archive

• epub - application/epub+zip
• zip - application/zip
• tar - application/x-tar
• rar - application/vnd.rar
• gz - application/gzip
• bz2 - application/x-bzip2
• 7z - application/x-7z-compressed
• xz - application/x-xz
• zstd - application/zstd
• pdf - application/pdf
• exe - application/vnd.microsoft.portable-executable
• swf - application/x-shockwave-flash
• rtf - application/rtf
• iso - application/x-iso9660-image
• eot - application/octet-stream
• ps - application/postscript
• sqlite - application/vnd.sqlite3
• nes - application/x-nintendo-nes-rom
• crx - application/x-google-chrome-extension
• cab - application/vnd.ms-cab-compressed
• deb - application/vnd.debian.binary-package
• ar - application/x-unix-archive
• Z - application/x-compress
• lz - application/x-lzip
• rpm - application/x-rpm
• elf - application/x-executable
• dcm - application/dicom

Documents

• doc - application/msword
• docx - application/vnd.openxmlformats-officedocument.wordprocessingml.document
• xls - application/vnd.ms-excel
• xlsx - application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
• ppt - application/vnd.ms-powerpoint
• pptx - application/vnd.openxmlformats-officedocument.presentationml.presentation

Font

• woff - application/font-woff
• woff2 - application/font-woff
• ttf - application/font-sfnt
• otf - application/font-sfnt

Application

• wasm - application/wasm
• dex - application/vnd.android.dex
• dey - application/vnd.android.dey

TODO

# add these flags

FILTERS:
   -fc, -filter-code string    Filter response with specified status code (e.g., -fc 403,401)
   -fl, -filter-length string  Filter response with specified content length (e.g., -fl 23,33)
   -ft, -filter-type string    Filter response with specified content type (e.g., -ft "text/html,image/jpeg")
   -fs, -filter-suffix string  Filter response with specified suffix name (e.g., -fs "CSS,Plain Text,html")

Extension Sources

• https://gist.github.com/ppisarczyk/43962d06686722d26d176fad46879d41
• https://github.com/github-linguist/linguist/blob/main/lib/linguist/languages.yml