convert2sms.sh

   1 #!/bin/bash
   2
   3 # constants
   4 MYDIR=$(dirname $0)
   5 PROGNAME=$(basename $0)
   6
   7 # configuration variables
   8 CONFIG=$MYDIR/convert2sms.rc
   9 DOMAINS=$(hostname -d | awk '{ print "@" $0 }')
  10 [ -f "$CONFIG" ] && source $CONFIG
  11 [ -z "$GATEWAY" -o -z "$PASSWORD" ] \
  12     && { echo "No valid configuration"; exit 1; }
  13
  14 # default variables
  15 DRYRUN=
  16 PHONE=
  17 TEMPFILE=$HOME/tmp/smsto.$$
  18
  19 # urlencode function
  20 function urlencode () {
  21     string=$*
  22
  23     #[ "$DRYRUN" ] && { echo $string; return; }
  24
  25     for ((i = 0 ; i < ${#string} ; i++ )); do
  26         c=${string:$i:1}
  27         case "$c" in
  28         [-_.~a-zA-Z0-9]) echo -n $c;;
  29        *) printf '%%%02x' "'$c"
  30        esac
  31     done
  32 }
  33
  34 # log function
  35 function log () {
  36     [ "$DRYRUN" ] && echo -e "\033[1;34m$*\033[0;0m" \
  37         || logger -i -t SMSTO "$*"
  38 }
  39
  40 # usage function
  41 function usage () {
  42     echo "usage: $PROGNAME [-h] [-p ..........]"
  43     echo "   -d: dryrun"
  44     echo "   -h: help message"
  45     echo "   -p: phone number"
  46     exit $1
  47 }
  48
  49 # get phone number from argument
  50 while [ $# -ne 0 ]; do
  51     case "$1" in
  52     -d) DRYRUN=1;;
  53     -h) usage 0;;
  54     -p) shift; PHONE=$1;;
  55     *) usage 1;;
  56     esac
  57     shift
  58 done
  59 [ "$PHONE" ] || usage 1
  60
  61 # clean up when done
  62 trap "/bin/rm -f $TEMPFILE" 0 1 2 3 15
  63
  64 # get mail from standard input
  65 while read -t 1 line; do
  66     echo "$line" >> $TEMPFILE
  67 done
  68 [ -f "$TEMPFILE" ] || { echo "No input email"; exit 1; }
  69
  70 # analyse message to get sender and subject
  71 FROM=$(awk '$1 == "From:" { sub(/[^ ]*: */, ""); print }' $TEMPFILE)
  72 SUBJECT=$(awk '$1 == "Subject:" { sub(/[^ ]*: */, ""); print }' $TEMPFILE)
  73 MESSAGE=$(awk '/^$/,0 { if (/^--/) exit; if (!/^$/) print }' $TEMPFILE)
  74
  75 # check sender domain
  76 ERR=1
  77 [ "$DOMAINS" ] || ERR=0
  78 for d in $DOMAINS; do
  79     [ "$FROM" ] || break;
  80     [[ $FROM =~ $d ]] && { ERR=0; break; }
  81 done
  82 [ $ERR -ne 0 ] && { log "Reject from '$FROM'"; exit 1; }
  83
  84 # check the right pattern of the number
  85 [[ "$PHONE" =~ ^0[0-9]*$ ]] \
  86     || { log "Incorrect phone number '$PHONE' from '$FROM'"; exit 1; }
  87 [[ "$PHONE" =~ ^00 ]] \
  88     && { log "International phone number '$PHONE' from '$FROM'"; exit 1; }
  89 [ ${#PHONE} -eq 10 ] \
  90     || { log "Non standard phone number '$PHONE' from '$FROM'"; exit 1; }
  91
  92 # log message
  93 log "Accept from '$FROM' to $PHONE"
  94
  95 # build message
  96 EMAIL=${FROM/#*<}; EMAIL=${EMAIL/%>*}
  97 FROM=${FROM/%<*}; FROM=${FROM/% }
  98 [ "$FROM" ] || FROM=EMAIL
  99 [ "$SUBJECT" ] && SUBJECT=" "$SUBJECT":"
 100 [ "$MESSAGE" ] && MESSAGE=$'\n'$MESSAGE
 101
 102 MESSAGE=$(urlencode "[$FROM]$SUBJECT$MESSAGE")
 103
 104 # send http command
 105 [ "$DRYRUN" ] && echo "SMS: $MESSAGE" \
 106     || wget --quiet --output-document=/dev/null \
 107         "http://$GATEWAY:9090/sendsms?phone=$PHONE&text=$MESSAGE&password=$PASSWORD"
 108
 109 exit $?