From 3526eb6d756e3c37190814eca2e22ce9f7d9f1de Mon Sep 17 00:00:00 2001
From: Hsieh Chin Fan <pham@topo.tw>
Date: Fri, 28 Jun 2024 01:24:13 +0800
Subject: Update

---
 snippets/snippets              |  1 -
 snippets/use_curl_send_mail    | 38 ++++++++++++++++++++++++++++++++++++++
 snippets/use_openssl_send_mail | 36 ++++++++++++++++++++++++++++++++++++
 3 files changed, 74 insertions(+), 1 deletion(-)
 delete mode 120000 snippets/snippets
 create mode 100644 snippets/use_curl_send_mail
 create mode 100644 snippets/use_openssl_send_mail

(limited to 'snippets')

diff --git a/snippets/snippets b/snippets/snippets
deleted file mode 120000
index a05fd8e..0000000
--- a/snippets/snippets
+++ /dev/null
@@ -1 +0,0 @@
-/home/pham/helper/snippets
\ No newline at end of file
diff --git a/snippets/use_curl_send_mail b/snippets/use_curl_send_mail
new file mode 100644
index 0000000..70eeb7c
--- /dev/null
+++ b/snippets/use_curl_send_mail
@@ -0,0 +1,38 @@
+#! /usr/bin/env bash
+
+# User input
+sender=typebrook@gmail.com
+receiver=typebrook@gmail.com
+gapp=$(pass google/imap_for_typebrook)
+sub="$(date) test mail from curl"
+body="$(echo -e 'just\na\ntest\nmail')"
+
+# check for provided attachment file as a positional parameter
+# -z indicating an empty positional parameter
+# attachment doesn't exist condition
+if [ -z "$1" ]; then
+
+	# curl command for accessing the smtp server
+
+	curl -s --url 'smtps://smtp.gmail.com:465' --ssl-reqd \
+		--mail-from $sender \
+		--mail-rcpt $receiver --user $sender:$gapp \
+		-T <(echo -e "From: ${sender}
+To: ${receiver}
+Subject: ${sub}
+
+ ${body}")
+
+# attachment exists condition
+else
+	file="$1" # set file as the 1st positional parameter
+
+	# MIME type for multiple type of input file extensions
+	MIMEType=$(file --mime-type "$file" | sed 's/.*: //')
+	curl -s --url 'smtps://smtp.gmail.com:465' --ssl-reqd \
+		--mail-from $sender \
+		--mail-rcpt $receiver --user $sender:$gapp \
+		-H "Subject: $sub" -H "From: $sender" -H "To: $receiver" -F \
+		'=(;type=multipart/mixed' -F "=$body;type=text/plain" -F \
+		"file=@$file;type=$MIMEType;encoder=base64" -F '=)'
+fi
diff --git a/snippets/use_openssl_send_mail b/snippets/use_openssl_send_mail
new file mode 100644
index 0000000..fabaca3
--- /dev/null
+++ b/snippets/use_openssl_send_mail
@@ -0,0 +1,36 @@
+#!/bin/bash
+
+# ref: https://stackoverflow.com/questions/9998710/is-it-possible-to-send-mails-by-bash-script-via-smtp
+# Use "host -t mx host" to find out mail server
+
+set -e
+
+MAIL_SERVER=smtp.gmail.com
+PORT=465
+MAIL_FROM=typebrook@gmail.com
+RCPT_TO=typebrook@gmail.com
+
+send_message_line_by_line() {
+	while read line; do
+		echo $line >/dev/tty
+		echo $line
+		sleep 1
+	done | openssl s_client -connect $MAIL_SERVER:$PORT -crlf
+}
+
+# 1. openssl do RENEGOTIATING when input starts with R, so use "rcpt to:" instead of "RCPT TO:"
+# 2. End mail with an empty line, and followed by '.' and 'QUIT'
+cat <<MAILEND | send_message_line_by_line
+HELO $MAIL_SERVER
+AUTH LOGIN
+$(echo $MAIL_FROM | base64)
+$(pass google/imap_for_typebrook | base64)
+MAIL FROM: <$MAIL_FROM>
+rcpt to: <$RCPT_TO>
+DATA
+Subject: $(date) test mail from bash
+Another test mail
+
+.
+QUIT
+MAILEND
-- 
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