mirror of
https://github.com/notwa/rc
synced 2024-11-12 15:59:02 -08:00
75 lines
2.5 KiB
Bash
Executable file
75 lines
2.5 KiB
Bash
Executable file
#!/usr/bin/env bash
|
|
# compat: +ash +bash +dash +zsh
|
|
|
|
burl() ( ### @-
|
|
### turn bash into a makeshift HTTP client.
|
|
### inspired by [hackshell.sh.](https://thc.org/hs)
|
|
### also works in most other shells thanks to netcat.
|
|
###
|
|
### minimal/minified version: https://eaguru.guru/t/burl.sh (469 bytes)
|
|
###
|
|
### ```
|
|
### $ burl httpbin.org/get
|
|
###
|
|
### HTTP/1.1 200 OK
|
|
### Date: Tue, 01 Jul 2024 00:00:00 GMT
|
|
### Content-Type: application/json
|
|
### Content-Length: 192
|
|
### Connection: close
|
|
### Server: gunicorn/19.9.0
|
|
### Access-Control-Allow-Origin: *
|
|
### Access-Control-Allow-Credentials: true
|
|
###
|
|
### {
|
|
### "args": {},
|
|
### "headers": {
|
|
### "Host": "httpbin.org",
|
|
### "X-Amzn-Trace-Id": "Root=1-12345678-deadfadefeedfacebeefcafe"
|
|
### },
|
|
### "origin": "0.0.0.0",
|
|
### "url": "http://httpbin.org/get"
|
|
### }
|
|
### ```
|
|
|
|
! (set -o pipefail) 2>&- || set -o pipefail
|
|
(: </dev/udp/localhost/0) 2>&- && net=y || net=
|
|
[ $'' ] && r=$(printf \\r) || r=$'\r'
|
|
|
|
# nc.traditional needs the -- or else it waits for input.
|
|
if /usr/bin/env nc --; [ $? = 1 ] # needs absolute path to env thanks to busybox
|
|
then wrapped() { process /usr/bin/env nc -- "$@" ;}
|
|
elif netcat; [ $? = 1 ]
|
|
then wrapped() { process netcat -- "$@" ;}
|
|
elif ncat; [ $? = 1 ]
|
|
then wrapped() { process ncat -- "$@" ;}
|
|
elif busybox nc; [ $? = 1 ]
|
|
then wrapped() { process busybox nc -- "$@" ;}
|
|
elif socat /dev/null /dev/null
|
|
then wrapped() { process socat - "TCP:$1:$2" ;}
|
|
elif websocat; [ $? = 1 ]
|
|
then wrapped() { websocat --binary - "tcp:$1:$2" ;}
|
|
elif curl; [ $? = 2 ]
|
|
then wrapped() { process curl "telnet://$1:$2" ;}
|
|
else return 127
|
|
fi 2>&-
|
|
|
|
request() { printf 'GET /%s HTTP/1.0\r\nHost: %s\r\n\r\n' "${query#/}" "$dom" ;}
|
|
receive() { while IFS=$r read -r l _; [ "$l" ]; do printf %s\\n "$l"; done; echo ;} >&2
|
|
process() { request | "$@" | { receive && cat ;} ;}
|
|
|
|
for url; do
|
|
proto="${url%%:*}" proto="${proto##*[!a-z0-9-]*}"
|
|
[ "$proto" ] && url="${url#$proto://}" || url="${url#//}"
|
|
host="${url%%/*}" query="${url#"$host"}" dom="${host%:*}"
|
|
[ "$host" = "${dom:?}" ] && PORT="${PORT:-80}" || PORT="${host##*:}"
|
|
if [ "$net" ]; then
|
|
exec 3<>"/dev/tcp/$dom/$PORT" &&
|
|
request >&3 && receive <&3 && cat <&3 || continue
|
|
exec 3>&-
|
|
else
|
|
wrapped "$dom" "$PORT" || return
|
|
fi
|
|
done
|
|
)
|
|
|
|
[ -n "${preload+-}" ] || burl "$@"
|