2 files changed, 42 insertions, 1 deletions

diff --git a/bin/mail/append_authorized_key.sh b/bin/mail/append_authorized_key.sh
index 950be90..3686959 100755
--- a/bin/mail/append_authorized_key.sh
+++ b/bin/mail/append_authorized_key.sh
@@ -13,7 +13,7 @@ MAIL="$(cat)"
 test -f ~/.config/passphase || exit 1
 PASSPHASE="$(cat ~/.config/passphase)"
 
-# Only execute the following script when header matched
+# Check passphase, or exit 0
 grep -qE "^Passphase: ${PASSPHASE}" <<<"$MAIL" || exit 0
 
 # Append comment and last line to ~/.ssh/authorized_keys
diff --git a/bin/mail/comment.sh b/bin/mail/comment.sh
new file mode 100755
index 0000000..807bcb2
--- /dev/null
+++ b/bin/mail/comment.sh
@@ -0,0 +1,41 @@
+#! /bin/bash
+
+output_dir=${output_dir:-/srv/http}
+
+# Restore mail into variable
+MAIL="$(tr -d '\r')"
+headers="$(<<<"$MAIL" sed '/^$/ q')"
+contents="$(<<<"$MAIL" sed -n '/^$/,$ p' | sed '1d')"
+
+# enable execute last command in pipe under current shell
+shopt -s lastpipe; set +m;
+
+# get route (target page of comment) and id
+<<<"$MAIL" sed -En '/^To: comment+/ {s/^To: comment\+([^+]+)\+?(.*)@.*$/\1 \2/p; q}; /^$/q' \
+| read route id
+
+# sender want comment on some page, but find no route for this
+if [ $route = "" ]; then
+  echo 'rcpt "comment+<ROUTE>" not matched' >&2
+  exit 1
+fi
+
+output=$output_dir/${route#/}.comment
+exec 1>>$output
+
+# check mail includes multiple part
+<<<"$headers" grep '^Content-Type:.*mixed' >/dev/null
+if [ $? -eq 0 ]; then
+  boundary="$(<<<"$headers" sed -En 's/^Content-Type:.*boundary="(.*)".*$/\1/p')"
+  if [ $boundary = "" ]; then
+    echo 'cannot get boundary from mail header' >&2
+    exit 1
+  fi
+
+  # print content of first mail part
+  pattern="\\@^--${boundary}\$@"
+  <<<"$contents" sed -n "${pattern},${pattern} p" | sed -n "1,4d; ${pattern} q; p"
+else
+  # print content
+  <<<"$contents" sed '/^$/,$ p'
+fi