#!/usr/bin/env bash
# ----------
# Default Configuration
# ----------
webhook_url="" # Incoming Webhooks integration URL
upload_token="" # The user's API authentication token, only used for file uploads
channel="general" # Default channel to post messages. '#' is prepended, if it doesn't start with '#' or '@'.
tmp_dir="/tmp" # Temporary file is created in this directory.
username="slacktee" # Default username to post messages.
icon="ghost" # Default emoji to post messages. Don't wrap it with ':'. See http://www.emoji-cheat-sheet.com; can be a url too.
attachment="" # Default color of the attachments. If an empty string is specified, the attachments are not used.
# ----------
# Initialization
# ----------
me=$(basename "$0")
title=""
mode="buffering"
link=""
textWrapper="\`\`\`"
parseMode=""
fields=()
# Since bash 3 doesn't support the associative array, we store colors and patterns separately
cond_color_colors=()
cond_color_patterns=()
found_pattern_color=""
# This color is used when 'attachment' is used without color specification
internal_default_color="#C0C0C0"
# Since bash 3 doesn't support the associative array, we store prefixes and patterns separately
cond_prefix_prefixes=()
cond_prefix_patterns=()
found_title_prefix=""
function show_help()
{
echo "usage: $me [options]"
echo " options:"
echo " -h, --help Show this help."
echo " -n, --no-buffering Post input values without buffering."
echo " -f, --file Post input values as a file."
echo " -l, --link Add a URL link to the message."
echo " -c, --channel channel_name Post input values to specified channel or user."
echo " -u, --username user_name This username is used for posting."
echo " -i, --icon emoji_name|url This icon is used for posting. You can use a word"
echo " from http://www.emoji-cheat-sheet.com or a direct url to an image."
echo " -t, --title title_string This title is added to posts."
echo " -m, --message-formatting format Switch message formatting (none|link_names|full)."
echo " See https://api.slack.com/docs/formatting for more details."
echo " -p, --plain-text Don't surround the post with triple backticks."
echo " -a, --attachment [color] Use attachment (richly-formatted message)"
echo " Color can be 'good','warning','danger' or any hex color code (eg. #439FE0)"
echo " See https://api.slack.com/docs/attachments for more details."
echo " -e, --field title value Add a field to the attachment. You can specify this multiple times."
echo " -s, --short-field title value Add a short field to the attachment. You can specify this multiple times."
echo " -o, --cond-color color pattern Change the attachment color if the specified Regex pattern matches the input."
echo " You can specify this multile times."
echo " If more than one pattern matches, the latest matched pattern is used."
echo " -d, --cond-prefix prefix pattern This prefix is added to the message, if the specified Regex pattern matches the input."
echo " You can specify this multile times."
echo " If more than one pattern matches, the latest matched pattern is used."
echo " --config config_file Specify the location of the config file."
echo " --setup Setup slacktee interactively."
}
function send_message()
{
message="$1"
# Prepend the prefix to the message, if it's set
if [[ -z $attachment && -n $found_pattern_prefix ]]; then
message="$found_pattern_prefix$message"
# Clear conditional prefix for the nest send
found_pattern_prefix=""
fi
escaped_message=$(echo "$textWrapper\n$message\n$textWrapper" | sed 's/"/\\"/g' | sed "s/'/\\'/g" )
message_attr=""
if [[ $message != "" ]]; then
if [[ -n $attachment ]]; then
# Set message color
message_color="$attachment"
if [[ -n $found_pattern_color ]]; then
message_color="$found_pattern_color"
# Reset with the default color for the next send
found_pattern_color="$attachment"
fi
message_attr="\"attachments\": [{ \"color\": \"$message_color\", \"mrkdwn_in\": [\"text\", \"fields\"], \"text\": \"$escaped_message\" "
if [[ -n $found_pattern_prefix ]]; then
orig_title=$title
title="$found_pattern_prefix $title"
# Clear conditional prefix for the nest send
found_pattern_prefix=""
fi
if [[ -n $title ]]; then
message_attr="$message_attr, \"title\": \"$title\" "
# Clear conditional prefix from title
title=$orig_title
fi
if [[ -n $link ]]; then
message_attr="$message_attr, \"title_link\": \"$link\" "
fi
if [[ $mode == "file" ]]; then
fields+=("{\"title\": \"Access URL\", \"value\": \"$access_url\" }")
fields+=("{\"title\": \"Download URL\", \"value\": \"$download_url\"}")
fi
if [[ ${#fields[@]} != 0 ]]; then
message_attr="$message_attr, \"fields\": ["
for field in "${fields[@]}"; do
message_attr="$message_attr $field,"
done
message_attr=${message_attr%?} # Remove last comma
message_attr="$message_attr ]"
fi
# Close attachment
message_attr="$message_attr }], "
else
message_attr="\"text\": \"$escaped_message\","
fi
icon_url="$icon"
#icon_emoji=""
#if echo "$icon" | grep -q "^https\?://.*"; then
# icon_url="$icon"
#else
# icon_emoji=":$icon:"
#fi
json="{\"channel\": \"$channel\", \"username\": \"$username\", $message_attr \"icon_emoji\": \"$icon_emoji\", \"icon_url\": \"$icon_url\" $parseMode}"
post_result=$(curl -X POST --data-urlencode "payload=$json" "$webhook_url" 2> /dev/null)
exit_code=1
if [[ $post_result == "ok" ]]; then
exit_code=0
fi
fi
}
function process_line()
{
echo "$1"
line="$(echo "$1" | sed $'s/\t/ /g')"
# Check the patterns of the conditional colors
# If more than one pattern matches, the latest pattern is used
if [[ ${#cond_color_patterns[@]} != 0 ]]; then
for i in "${!cond_color_patterns[@]}"; do
if [[ $line =~ ${cond_color_patterns[$i]} ]]; then
found_pattern_color=${cond_color_colors[$i]}
fi
done
fi
# Check the patterns of the conditional titles
# If more than one pattern matches, the latest pattern is used
if [[ ${#cond_prefix_patterns[@]} != 0 ]]; then
for i in "${!cond_prefix_patterns[@]}"; do
if [[ $line =~ ${cond_prefix_patterns[$i]} ]]; then
found_pattern_prefix=${cond_prefix_prefixes[$i]}
if [[ -n $attachment || $mode != "no-buffering" ]]; then
# Append a line break to the prefix for better formatting
found_pattern_prefix="$found_pattern_prefix\n"
else
# Append a space to the prefix for better formatting
found_pattern_prefix="$found_pattern_prefix "
fi
fi
done
fi
if [[ $mode == "no-buffering" ]]; then
prefix=''
if [[ -z $attachment ]]; then
prefix=$title
fi
send_message "$prefix$line"
elif [[ $mode == "file" ]]; then
echo "$line" >> "$filename"
else
if [[ -z "$text" ]]; then
text="$line"
else
text="$text\n$line"
fi
fi
}
function setup()
{
if [[ -z "$HOME" ]]; then
echo "\$HOME is not defined. Please set it first."
exit 1
fi
local_conf="$HOME/.slacktee"
if [[ -e "$local_conf" ]]; then
echo ".slacktee is found in your home directory."
read -p "Are you sure to overwrite it? [y/n] :" choice
case "$choice" in
y|Y )
# Continue
;;
* )
exit 0 # Abort
;;
esac
fi
# Load current local config
. $local_conf
# Start setup
read -p "Incoming Webhook URL [$webhook_url]: " input_webhook_url
if [[ -z "$input_webhook_url" ]]; then
input_webhook_url=$webhook_url
fi
read -p "Upload Token [$upload_token]: " input_upload_token
if [[ -z "$input_upload_token" ]]; then
input_upload_token=$upload_token
fi
read -p "Temporary Directory [$tmp_dir]: " input_tmp_dir
if [[ -z "$input_tmp_dir" ]]; then
input_tmp_dir=$tmp_dir
fi
read -p "Default Channel [$channel]: " input_channel
if [[ -z "$input_channel" ]]; then
input_channel=$channel
fi
read -p "Default Username [$username]: " input_username
if [[ -z "$input_username" ]]; then
input_username=$username
fi
read -p "Default Icon: [$icon]: " input_icon
if [[ -z "$input_icon" ]]; then
input_icon=$icon
fi
read -p "Default color of the attachment. (empty string disables attachment) [$attachment]: " input_attachment
if [[ -z "$input_attachment" ]]; then
input_attachment=$attachment
elif [[ $input_attachment == '""' || $input_attachment == "''" ]]; then
input_attachment=""
fi
cat <<- EOF | sed 's/^[[:space:]]*//' > "$local_conf"
webhook_url="$input_webhook_url"
upload_token="$input_upload_token"
tmp_dir="$input_tmp_dir"
channel="$input_channel"
username="$input_username"
icon="$input_icon"
attachment="$input_attachment"
EOF
}
# ----------
# Parse command line options
# ----------
OPTIND=1
while [[ $# -gt 0 ]]; do
opt="$1"
shift
case "$opt" in
-h|\?|--help)
show_help
exit 0
;;
-n|--no-buffering)
mode="no-buffering"
;;
-f|--file)
mode="file"
;;
-l|--link)
link="$1"
shift
;;
-c|--channel)
opt_channel="$1"
shift
;;
-u|--username)
opt_username="$1"
shift
;;
-i|--icon)
opt_icon="$1"
shift
;;
-t|--title)
title="$1"
shift
;;
-d|--cond-prefix)
case "$1" in
-*|'')
# Found next command line option or empty. Error.
echo "a prefix of the conditional title was not specified"
show_help
exit 1
;;
*)
# Prefix should be found
case "$2" in
-*|'')
# Found next command line option or empty. Error.
echo "a pattern of the conditional title was not specified"
show_help
exit 1
;;
*)
# Set the prefix and the pattern to arrays
cond_prefix_prefixes+=("$1")
cond_prefix_patterns+=("$2")
shift
shift
;;
esac
;;
esac
;;
-m|--message-formatting)
case "$1" in
none)
parseMode=', "parse": "none"'
;;
link_names)
parseMode=', "link_names": "1"'
;;
full)
parseMode=', "parse": "full"'
;;
*)
echo "unknown message formatting option"
show_help
exit 1
;;
esac
shift
;;
-p|--plain-text)
textWrapper=""
;;
-a|--attachment)
case "$1" in
-*|'')
# Found next command line option
opt_attachment="$internal_default_color" # Use default color
;;
\#*|good|warning|danger)
# Found hex color code or predefined colors
opt_attachment="$1"
shift
;;
*)
echo "unknown attachment color"
show_help
exit 1
;;
esac
;;
-o|--cond-color)
case "$1" in
-*|'')
# Found next command line option or empty. Error.
echo "a color of the conditional color was not specified"
show_help
exit 1
;;
\#*|good|warning|danger)
# Found hex color code or predefined colors
case "$2" in
-*|'')
# Found next command line option or empty. Error.
echo "a pattern of the conditional color was not specified"
show_help
exit 1
;;
*)
# Set the color and the pattern to arrays
cond_color_colors+=("$1")
cond_color_patterns+=("$2")
shift
shift
;;
esac
;;
*)
echo "unknown attachment color $1"
show_help
exit 1
;;
esac
;;
-e|-s|--field|--short-field)
case "$1" in
-*|'')
# Found next command line option or empty. Error.
echo "field title was not specified"
show_help
exit 1
;;
*)
case "$2" in
-*|'')
# Found next command line option or empty. Error.
echo "field value was not specified"
show_help
exit 1
;;
*)
if [[ $opt == "-s" || $opt == "--short-field" ]]; then
fields+=("{\"title\": \"$1\", \"value\": \"$2\", \"short\": true}")
else
fields+=("{\"title\": \"$1\", \"value\": \"$2\"}")
fi
shift
shift
;;
esac
esac
;;
--config)
CUSTOM_CONFIG=$1
shift
;;
--setup)
setup
exit 1
;;
*)
echo "illegal option $opt"
show_help
exit 1
;;
esac
done
# ---------
# Read in our configurations
# ---------
if [[ -e "/etc/slacktee.conf" ]]; then
. /etc/slacktee.conf
fi
if [[ -n "$HOME" && -e "$HOME/.slacktee" ]]; then
. "$HOME/.slacktee"
fi
if [[ -e "$CUSTOM_CONFIG" ]]; then
. $CUSTOM_CONFIG
fi
# Overwrite webhook_url if the environment variable SLACKTEE_WEBHOOK is set
if [[ "$SLACKTEE_WEBHOOK" != "" ]]; then
webhook_url="$SLACKTEE_WEBHOOK"
fi
# Overwrite upload_token if the environment variable SLACKTEE_TOKEN is set
if [[ "$SLACKTEE_TOKEN" != "" ]]; then
upload_token="$SLACKTEE_TOKEN"
fi
# Overwrite channel if it's specified in the command line option
if [[ "$opt_channel" != "" ]]; then
channel="$opt_channel"
fi
# Overwrite username if it's specified in the command line option
if [[ "$opt_username" != "" ]]; then
username="$opt_username"
fi
# Overwrite icon if it's specified in the command line option
if [[ "$opt_icon" != "" ]]; then
icon="$opt_icon"
fi
# Overwrite attachment if it's specified in the command line option
if [[ "$opt_attachment" != "" ]]; then
attachment="$opt_attachment"
fi
# Set the default color to attachment if it's still empty and the length of the cond_color_patterns is not 0
if [[ -z $attachment ]] && [[ ${#cond_color_patterns[@]} != 0 ]]; then
attachment="$internal_default_color"
fi
# ----------
# Validate configurations
# ----------
if [[ $webhook_url == "" ]]; then
echo "Please setup the webhook url of this incoming webhook integration."
exit 1
fi
if [[ $upload_token == "" && $mode == "file" ]]; then
echo "Please provide the authentication token for file uploads."
exit 1
fi
if [[ $channel == "" ]]; then
echo "Please specify a channel."
exit 1
elif [[ ( "$channel" != "#"* ) && ( "$channel" != "@"* ) ]]; then
channel="#$channel"
fi
if [[ -n "$icon" ]]; then
icon=${icon#:} # remove leading ':'
icon=${icon%:} # remove trailing ':'
fi
# ----------
# Start script
# ----------
text=""
if [[ -n "$title" || -n "$link" ]]; then
# Use link as title, if title is not specified
if [[ -z "$title" ]]; then
title="$link"
fi
# Add title to filename in the file mode
if [[ "$mode" == "file" ]]; then
filetitle=$(echo "$title"|sed 's/[ /:.]//g')
filetitle="$filetitle-"
fi
if [[ -z "$attachment" ]]; then
if [[ "$mode" == "no-buffering" ]]; then
if [[ -n "$link" ]]; then
title="<$link|$title>: "
else
title="$title: "
fi
elif [[ "$mode" == "file" ]]; then
if [[ -n "$link" ]]; then
title="<$link|$title>"
fi
else
if [[ -n "$link" ]]; then
text="-- <$link|$title> --\n"
else
text="-- $title --\n"
fi
fi
fi
fi
timestamp="$(date +'%m%d%Y-%H%M%S')"
filename="$tmp_dir/$filetitle$$-$timestamp.log"
if [[ "$mode" == "file" ]]; then
touch $filename
fi
exit_code=0
while IFS='' read line; do
process_line "$line"
done
if [[ -n $line ]]; then
process_line "$line"
fi
if [[ "$mode" == "buffering" ]]; then
send_message "$text"
elif [[ "$mode" == "file" ]]; then
if [[ -s "$filename" ]]; then
channels_param=""
if [[ ( "$channel" == "#"* ) ]]; then
# Set channels for making the file public
channels_param="-F channels=$channel"
fi
result="$(curl -F file=@"$filename" -F token="$upload_token" $channels_param https://slack.com/api/files.upload 2> /dev/null)"
access_url="$(echo "$result" | awk 'match($0, /url_private":"([^"]*)"/) {print substr($0, RSTART+14, RLENGTH-15)}'|sed 's/\\//g')"
download_url="$(echo "$result" | awk 'match($0, /url_private_download":"([^"]*)"/) {print substr($0, RSTART+23, RLENGTH-24)}'|sed 's/\\//g')"
if [[ -n "$attachment" ]]; then
text="Input file has been uploaded"
else
if [[ "$title" != "" ]]; then
title=" of $title"
fi
text="Input file$title has been uploaded.\n$access_url\n\nYou can download it from the link below.\n$download_url"
fi
send_message "$text"
fi
# Clean up the temp file
rm "$filename"
fi
exit $exit_code