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120 lines
2.2 KiB
Bash
120 lines
2.2 KiB
Bash
#!/bin/bash
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set -o errexit
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set -o nounset
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set -o pipefail
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### Example: image upload bot
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###
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### Upload and display inline images.
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###
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### * shell 1
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###
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### export XMPPIPE_USERNAME=...
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### export XMPPIPE_PASSWORD=...
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###
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### image-upload -o <groupchat>
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### image-upload --chat -o <jid>
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###
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### # to debug
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### image-upload -vvv -o <groupchat>
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### bash -x image-upload -o <groupchat>
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###
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### * shell 2
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###
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### echo "upload::::example.png" > /tmp/image_upload/stdin
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###
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trap cleanup 0
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TMPDIR="${TMPDIR-/tmp/image_upload}"
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mkdir "$TMPDIR"
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in="$TMPDIR/stdin"
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out="$TMPDIR/stdout"
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mkfifo "$in"
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mkfifo "$out"
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cleanup() {
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rm -rf "$TMPDIR"
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}
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encode() {
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local string="${1}"
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local strlen=${#string}
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local encoded=""
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for ((pos = 0; pos < strlen; pos++)); do
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c=${string:$pos:1}
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case "$c" in
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[@-_.~a-zA-Z0-9]) o="${c}" ;;
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*) printf -v o '%%%02X' "'$c" ;;
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esac
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encoded+="${o}"
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done
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echo "${encoded}"
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}
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decode() {
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printf '%b' "${1//%/\\x}"
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}
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bot() {
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local filename
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# shellcheck disable=SC2034
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while IFS=: read stanza _type _from _to body; do
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case "$stanza" in
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upload)
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filename="$body"
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if [ ! -f "$filename" ]; then
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echo "error: not found: $filename"
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continue
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fi
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local content_type
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local size
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local encoded
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content_type="$(file --brief --mime-type "$filename")"
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size="$(stat --format="%s" "$filename")"
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encoded="$(encode "$(basename "$filename")|$size|$content_type")"
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echo "u::::$encoded"
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;;
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U)
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local decoded
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decoded="$(decode "$body")"
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OFS="$IFS"
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IFS="|"
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# shellcheck disable=SC2086
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set -- $decoded
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local GET
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local PUT
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GET="$1"
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PUT="$2"
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IFS="$OFS"
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curl "$PUT" --upload-file "$filename"
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echo "$GET" >/dev/stderr
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local encoded
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encoded="$(encode "$GET")"
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echo "I::::$encoded"
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;;
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*) echo "received: $stanza $_type $_from $_to $body" 1>&2 ;;
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esac
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done <"$in"
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}
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cat <<EOF
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in="$TMPDIR/stdin"
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out="$TMPDIR/stdout"
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EOF
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bot >"$out" &
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xmppipe --format csv "$@" <"$out" >"$in"
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