pomfload

#!/bin/sh
# Requires jq (https://stedolan.github.io/jq): sudo pacman -S jq
usage() {
    printf %s\\n \
        "Usage: $(basename -- "$0") [OPTIONS] --upload upload-url [--] FILE [FILES...]" \
        "Options:" \
        "  --upload URL          -u     The endpoint to upload to" \
        "  --download URL        -d     The prefix to add to the URL the server returns" \
        "  --[no-]progress       -p/-n  [Do not] show a progress indicator" \
        "  --upload-field FIELD  -f     The form field the server expects the file to be in" \
        "  --raw-reply           -r     Expect a single URL from the server rather than JSON" \
        "  --redirects           -R     Expect a redirection from the server rather than JSON" \
        "  --                           Marks end of options" \
        >&2
}

[ "$#" -lt 1 ] && { usage; exit 1; }

if tty > /dev/null; then
    show_progress=true
else
    show_progress=false
fi

upload_url=
download_url=
upload_field='files[]'
raw_reply=false
redirects=false

eval "set -- $(getopt -n "$0" -o u:d:f:rRpn -l upload:,download:,upload-field:,raw-reply,redirects,progress,no-progress -- "$@")"
while [ "$#" != 0 ]; do
    case $1 in
        --upload|-u)      upload_url=$2; shift;;
        --download|-d)    download_url=$2; shift;;
        --progress|-p)    show_progress=true;;
        --no-progress|-n) show_progress=false;;
        --upload-field|-f) upload_field=$2; shift;;
        --raw-reply|-r)   raw_reply=true;;
        --redirects|-R)   redirects=true;;
        --) break;;
        *) usage; exit 1;;
    esac; shift
done; shift

newline='
'

$redirects && raw_reply=true

send_file() {
    local f
    f=$1

    set -- -sS

    if $redirects; then
        set -- "$@" -w "%{url_effective}" -L -o /dev/null
    fi
    if $show_progress; then
        set -- "$@" --progress-bar
    fi

    curl "$@" -F "$upload_field=@$f" -- "${upload_url:?}"
}

result=0
for f do
    if ! pomf_reply="$(send_file "$f")"; then
        echo "Failed to upload $f" >&2
        printf %s\\n "$url" >&2 # Maybe it contains some error message now?
        result=1
    else
        if $raw_reply; then
            pomf_id=$pomf_reply
        else
            if ! pomf_reply_parsed=$(printf %s\\n "$pomf_reply" | jq -r '.success, .error, .files[0].url'); then
                echo "Failed to parse uploader response to $f" >&2
                printf "Response:\n%s\n" "$pomf_reply" >&2
                result=1
                continue
            fi

            pomf_success=${pomf_reply_parsed%%"$newline"*}; pomf_reply_parsed=${pomf_reply_parsed#*"$newline"}
            pomf_error_message=${pomf_reply_parsed%%"$newline"*}; pomf_reply_parsed=${pomf_reply_parsed#*"$newline"}
            pomf_id=$pomf_reply_parsed

            if [ "$pomf_success" != true ]; then
                echo "Failed to upload $f" >&2
                echo "Server error: $pomf_error_message" >&2
                result=1
                continue
            fi
        fi

        url=$download_url$pomf_id

        [ "$#" -gt 1 ] && printf "%s: " "$f"
        printf %s\\n "$url"

        printf '%s\t%s\t%s\n' "$(date --rfc-3339=seconds)" "$url" "$f" >> ~/.pomf_history
    fi
done
exit "$result"