imgur

#!/bin/bash

# imgur script by Bart Nagel <bart@tremby.net>
# version 4
# I release this into the public domain. Do with it what you will.

# Required: curl
#
# Optional: xsel or xclip for automatically putting the URLs on the X selection
# for easy pasting
#
# Instructions:
# Put it somewhere in your path and maybe rename it:
#   mv ~/Downloads/imgurbash.sh ~/bin/imgur
# Make it executable:
#   chmod +x ~/bin/imgur
# Optional, since Alan kindly provided an API key for this script: stick your
# API key in the top:
#   vim ~/bin/imgur
# Upload an image:
#   imgur images/hilarious/manfallingover.jpg
# Upload multiple images:
#   imgur images/delicious/cake.png images/exciting/bungeejump.jpg
# The URLs will be displayed (and the delete page's URLs will be displayed on
# stderr). If you have xsel or xclip the URLs will also be put on the X
# selection, which you can usually paste with a middle click.

# OAuth 2.0 Client ID.
clientid="3d46d46f960fd56"

# function to output usage instructions
function usage {
    echo "Usage: $(basename "$0") <filename> [<filename> [...]]" >&2
    echo "Upload images to imgur and output their new URLs to stdout. Each one's" >&2
    echo "delete page is output to stderr between the view URLs." >&2
    echo "If xsel or xclip is available, the URLs are put on the X selection for" >&2
    echo "easy pasting." >&2
}

# check API key has been entered
if [ -z "$clientid" ]; then
    echo "You first need to edit the script and put your API key in the variable near the top." >&2
    exit 15
fi

# check arguments
if [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
    usage
    exit 0
elif [ $# == 0 ]; then
    echo "No file specified" >&2
    usage
    exit 16
fi

# check curl is available
type curl >/dev/null 2>/dev/null || {
    echo "Couln't find curl, which is required." >&2
    exit 17
}

clip=""
errors=false

# loop through arguments
while [ $# -gt 0 ]; do
    file="$1"
    shift

    # check file exists
    if [ ! -f "$file" ]; then
        echo "file '$file' doesn't exist, skipping" >&2
        errors=true
        continue
    fi

    # upload the image
    # the "Expect: " header is to get around a problem when using this through
    # the Squid proxy. Not sure if it's a Squid bug or what.
    response=$(curl -H "Authorization: Client-ID $clientid" -H "Expect: " \
        -F "image=@$file" https://api.imgur.com/3/image.xml 2>/dev/null)
    if [ $? -ne 0 ]; then
        echo "Upload failed" >&2
        errors=true
        continue
    elif [ "$(echo "$response" | grep -c "<error_msg>")" -gt 0 ]; then
        echo "Error message from imgur:" >&2
        echo "$response" | sed -nE 's/.*<error_msg>(.*)<\/error_msg>.*/\1/p' >&2
        errors=true
        continue
    fi

    # parse the response and output our stuff
    url=$(echo "$response" | sed -nE 's/.*<link>(.*)<\/link>.*/\1/p')
    deletehash=$(echo "$response" | sed -nE 's/.*<deletehash>(.*)<\/deletehash>.*/\1/p')
    echo "$url"
    echo "Delete page: https://imgur.com/delete/$deletehash" >&2

    # append the URL to a string so we can put them all on the clipboard later
    clip="$clip$url
"
done

# put the URLs on the clipboard if we have xsel or xclip
if [ "$(uname)" = "Linux" ]; then
    if [ -n "$DISPLAY" ]; then
        { type xsel >/dev/null 2>/dev/null && echo -n "$clip" | xsel; } \
            || { type xclip >/dev/null 2>/dev/null && echo -n "$clip" | xclip; } \
            || echo "Haven't copied to the clipboard: no xsel or xclip" >&2
    else
        echo "Haven't copied to the clipboard: no \$DISPLAY" >&2
    fi
elif [ "$(uname)" = "Darwin" ]; then
    { type pbcopy >/dev/null 2>/dev/null && echo -n "$clip" | pbcopy; } \
        || echo "Haven't copied to the clipboard: no pbcopy" >&2
fi

if $errors; then
    exit 1
fi