File: get.sh 1 #!/bin/sh 2 3 # The MIT License (MIT) 4 # 5 # Copyright © 2024 pacman64 6 # 7 # Permission is hereby granted, free of charge, to any person obtaining a copy 8 # of this software and associated documentation files (the “Software”), to deal 9 # in the Software without restriction, including without limitation the rights 10 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 # copies of the Software, and to permit persons to whom the Software is 12 # furnished to do so, subject to the following conditions: 13 # 14 # The above copyright notice and this permission notice shall be included in 15 # all copies or substantial portions of the Software. 16 # 17 # THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 20 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 # SOFTWARE. 24 25 26 # get [options...] [filepath/URI/data-URI...] 27 # 28 # Get data from the named source given, whether this is a filename, a URI, 29 # or even a base64-encoded data-URI. Data-URIs are simply decoded into the 30 # bytes they represent, no loading/fetching required. 31 # 32 # The only options show this help message, via any of `-h`, `--h`, `-help`, 33 # or `--help`. 34 35 36 # fail quits the script right after showing the message given, using 37 # exit code given as its 2nd arg 38 fail() { 39 printf "\e[31m%s\e[0m\n" "$1" > /dev/stderr 40 exit "${2:-1}" 41 } 42 43 if [ $# -eq 0 ]; then 44 cat 45 exit $? 46 fi 47 48 # if the argument given is an existing file, just use `cat`, even if the 49 # name looks like a protocol presumably meant for `curl` 50 if [ -e "$1" ]; then 51 cat "$1" 52 exit $? 53 fi 54 55 # handle leading options 56 case "$1" in 57 -h|--h|-help|--help) 58 awk '/^# +get/, /^$/ { gsub(/^# ?/, ""); print }' "$0" 59 exit 0 60 ;; 61 esac 62 63 case "$1" in 64 dict://*|ftp://*|ftps://*|gopher://*|gophers://*|http://*|https://*|\ 65 rtmp://*|rtsp://*|scp://*|sftp://*|smb://*|smbs://*|telnet://*|tftp://*) 66 # handle URIs 67 curl -s -L "$1" || fail "failed to fetch URI '$1'" $? 68 ;; 69 70 data:*) 71 # handle data-URIs 72 { printf "%s" "$1" | sed 's-^.{0,64},--1' | base64 -d; } || \ 73 fail "failed to decode data-URI '$1'" $? 74 ;; 75 76 file://*) 77 # handle files 78 cat "$(echo "$1" | sed 's-file://--1')" 2> /dev/null || \ 79 fail "failed to open file '$1'" $? 80 ;; 81 82 *) 83 # handle files 84 cat "$1" 2> /dev/null || fail "failed to open file '$1'" $? 85 ;; 86 esac