[Dovecot] Add decode2text.sh

data/Dockerfiles/dovecot/decode2text.sh

@@ -0,0 +1,105 @@
+#!/bin/sh
+
+# Example attachment decoder script. The attachment comes from stdin, and
+# the script is expected to output UTF-8 data to stdout. (If the output isn't
+# UTF-8, everything except valid UTF-8 sequences are dropped from it.)
+
+# The attachment decoding is enabled by setting:
+#
+# plugin {
+#   fts_decoder = decode2text
+# }
+# service decode2text {
+#   executable = script /usr/local/libexec/dovecot/decode2text.sh
+#   user = dovecot
+#   unix_listener decode2text {
+#     mode = 0666
+#   }
+# }
+
+libexec_dir=`dirname $0`
+content_type=$1
+
+# The second parameter is the format's filename extension, which is used when
+# found from a filename of application/octet-stream. You can also add more
+# extensions by giving more parameters.
+formats='application/pdf pdf
+application/x-pdf pdf
+application/msword doc
+application/mspowerpoint ppt
+application/vnd.ms-powerpoint ppt
+application/ms-excel xls
+application/x-msexcel xls
+application/vnd.ms-excel xls
+application/vnd.openxmlformats-officedocument.wordprocessingml.document docx
+application/vnd.openxmlformats-officedocument.spreadsheetml.sheet xlsx
+application/vnd.openxmlformats-officedocument.presentationml.presentation pptx
+application/vnd.oasis.opendocument.text odt
+application/vnd.oasis.opendocument.spreadsheet ods
+application/vnd.oasis.opendocument.presentation odp
+'
+
+if [ "$content_type" = "" ]; then
+  echo "$formats"
+  exit 0
+fi
+
+fmt=`echo "$formats" | grep -w "^$content_type" | cut -d ' ' -f 2`
+if [ "$fmt" = "" ]; then
+  echo "Content-Type: $content_type not supported" >&2
+  exit 1
+fi
+
+# most decoders can't handle stdin directly, so write the attachment
+# to a temp file
+path=`mktemp`
+trap "rm -f $path" 0 1 2 3 14 15
+cat > $path
+
+xmlunzip() {
+  name=$1
+
+  tempdir=`mktemp -d`
+  if [ "$tempdir" = "" ]; then 
+    exit 1
+  fi
+  trap "rm -rf $path $tempdir" 0 1 2 3 14 15
+  cd $tempdir || exit 1
+  unzip -q "$path" 2>/dev/null || exit 0
+  find . -name "$name" -print0 | xargs -0 cat |
+    $libexec_dir/xml2text
+}
+
+wait_timeout() {
+  childpid=$!
+  trap "kill -9 $childpid; rm -f $path" 1 2 3 14 15
+  wait $childpid
+}
+
+LANG=en_US.UTF-8
+export LANG
+if [ $fmt = "pdf" ]; then
+  /usr/bin/pdftotext $path - 2>/dev/null&
+  wait_timeout 2>/dev/null
+elif [ $fmt = "doc" ]; then
+  (/usr/bin/catdoc $path; true) 2>/dev/null&
+  wait_timeout 2>/dev/null
+elif [ $fmt = "ppt" ]; then
+  (/usr/bin/catppt $path; true) 2>/dev/null&
+  wait_timeout 2>/dev/null
+elif [ $fmt = "xls" ]; then
+  (/usr/bin/xls2csv $path; true) 2>/dev/null&
+  wait_timeout 2>/dev/null
+elif [ $fmt = "odt" -o $fmt = "ods" -o $fmt = "odp" ]; then
+  xmlunzip "content.xml"
+elif [ $fmt = "docx" ]; then
+  xmlunzip "document.xml"
+elif [ $fmt = "xlsx" ]; then
+  xmlunzip "sharedStrings.xml"
+elif [ $fmt = "pptx" ]; then
+  xmlunzip "slide*.xml"
+else
+  echo "Buggy decoder script: $fmt not handled" >&2
+  exit 1
+fi
+exit 0