Bash script email doesn't ignore the html part in output

Question

LE. I killed everything html related. Declared 2 variables R and G (for red and green).

My mail shows the status [0;32mGLOBAL_STATUS = OK, obvious not in colours.

If I comment my variables I receive in the email GLOBAL_STATUS = OK -> no colours.

Pretty please help me receive the mail with green GLOBAL_STATUS = OK

I wrote this part of the code, but it doesn’t print in the email I should receive: GLOBAL_STATUS = OK in green ☹

It shows on top of the email: <h1> <span style='color:green;'> GLOBAL_STATUS = OK </span></h1><br/><br/><br/>

And at the end of the email: <html> <body> <br><br><br> </body> </html>

What am I doing wrong? I tried to eliminate the html, body, etc parts, but still, the beginning of the mail is the same: <h1> <span style='color:green;'> GLOBAL_STATUS = OK </span></h1><br/><br/><br/>

#echo "<html> ">>$LOG
#echo "<body>" >> $LOG
#echo "<br><br><br>" >> $LOG
#echo "<br><br><br>" >> $LOG
R='\033[0;31m'
G='\033[0;32m'
content="tmp.txt"
global_status=0
while read line; do
   if [[ "$line" == *"KO"* && "$global_status" == "0" ]]; then
         echo -e "\n\n\n $line";
         ((global_status=!global_status));
         echo -e "\n $global_status"
   fi
   echo "$line" >> $content
done < $LOG

#echo "<h1>" > $LOG
if [ "$global_status" -eq 0 ]; then
     echo -e "${G}GLOBAL_STATUS = OK" > $LOG
else 
     echo -e "${R}GLOBAL_STATUS = KO" > $LOG
fi
cat $content >> $LOG
rm tmp.txt
#echo "</body>" >> $LOG
#echo "</html>" >> $LOG
mail -s "Check Back" [email protected] < /home/check_back.log

Welcome to the site. Pleas edit your post to specify how the generated e-mail is being sent to you. How do you ensure that the e-mail is sent in HTML format and not in plain-text format (which would treat all HTML commands as literal text, not formatting instructions)? — AdminBee
– AdminBee, Commented Aug 24, 2022 at 9:49
I edited the email part. The problem is that I need to check 17 servers status. And print if one KO, Global status KO. If all OK, Global Status ok. The servers status and info is super ok, just this snippet of code for GLOBAL STATUS is not working. — Lola
– Lola, Commented Aug 24, 2022 at 9:53
In seems you have a typo. The line echo "<h1>" > $LOG should read echo "<h1>" >> $LOG, otherwise you are overwriting everything written to the file so far. — AdminBee
– AdminBee, Commented Aug 24, 2022 at 9:57
if I put >> it doesn't send any status, only my servers information — Lola
– Lola, Commented Aug 24, 2022 at 9:58
you use $LOG both as mail body and status control (in while loop) ? — Archemar
– Archemar, Commented Aug 24, 2022 at 10:02

ilkkachu · Accepted Answer · 2022-08-24 20:47:56Z

Focusing on this:

Pretty please help me receive the mail with green GLOBAL_STATUS = OK

One problem you might have could be the Content-type header. If it marks the message as plaintext (text/plain), it'll likely show as such. You'll need to change the header to mark the type as text/html.

E.g. with the mail command from Debian's bsd-mailx package, this works at least as received by Gmail.

#!/bin/sh

[email protected]
mail -s "colortest" -a 'Content-Type: text/html; charset="UTF-8"' "$emailaddr" << EOF
<html>

<h1> <span style='color:green;'>  GLOBAL_STATUS = OK </span></h1>
</h1>
<p>
Blah blah...
</p>

</html>
EOF

At least this particular version of mail sets the content type to text/plain by default, unless overridden. See the man page for notes on -a and the MIME headers.

Note that other versions of the mail tool may be different, they may have a different way for setting headers. I also didn't check the HTML syntax at all: you may want to actually check the proper DOCTYPEs to use, etc. You might also need to check the encoding (Content-Transfer-Encoding header), if you do use non-ASCII characters in the message.

Also, to do it properly, you should probably generate a multipart MIME message with both text/plain and text/html variants. I'm not going to go there either.

As for that code, if you're only looking for the string KO from the input file, and passing the file through in full, you could just use grep instead of the shell loop. Maybe something in this direction (untested):

#!/bin/sh

[email protected]
status=XXX
color=xxx
subject=test
inputfile=foo.txt
msgfile=$(mktemp)
if grep -qe KO "$inputfile"; then
    status='GLOBAL_STATUS = KO'
    color=red
else
    status='GLOBAL_STATUS = OK'
    color=green
fi

> "$msgfile"
cat <<EOF >> "$msgfile" 
<html>
<h1><span style='color:$color;'> $status </span></h1>
</h1>
<pre>
EOF
cat "$inputfile" >> "$msgfile"
cat <<EOF >> "$msgfile" 
</pre>
</html>
EOF

mail -s "$subject" -a 'Content-Type: text/html; charset="UTF-8"' \
    "$emailaddr" < "$msgfile"

rm -f "$msgfile"

Thank you so much for your time. I implemented your code, but still, I have no colours for the statuses. I also tried to put the colors with ' or ", same thing. Tried all caps, first letter big. Changed the email part as I had errors. ARG_EMAIL_TO="[email protected]" ARG_EMAIL_FROM="<[email protected]>" ARG_EMAIL_SUBJECT="Check BACK" ( echo "To: ${ARG_EMAIL_TO}" echo "From: ${ARG_EMAIL_FROM}" echo "Subject: ${ARG_EMAIL_SUBJECT}" echo "Mime-Version: 1.0" echo "Content-Type: text/html; charset='utf-8'" echo cat "$msgfile" ) | sendmail -t — Lola
– Lola, Commented Aug 25, 2022 at 10:01
@Lola, seems to work for me with that sendmail command too (and the message text from above). But I didn't test with other clients etc. I don't think I have any other ideas, sorry :/ — ilkkachu
– ilkkachu, Commented Aug 25, 2022 at 10:42
@ikkach I made it work. I saw a very strange thing, my last 15 minutes modification were ok. The fact is that from some strange thing all mails went to junk. I deleted my unlucky mails, and I don't know why, I went to deleted, and saw my mails had the green status. Went again trying to find what did I do that was good. Found it. Thank you so very much. :* >:D< — Lola
– Lola, Commented Aug 25, 2022 at 11:06

Lola · Accepted Answer · 2022-08-26 14:20:32Z

0

So my last step in this script is to compare the dates from the servers and compare them with today's date. If the date for one server is not today's date DATE = KO.

Tried this:

LOG="/home/check_back.log"
date="date +%d-%m-%y -r"
datemail=$(date "+%d-%m-%y")
>LOG

For each server the date is read and printed in the email with: 
echo " " && $date /tmp/check_back.log"  >>$LOG

if [[ $date -lt $datemail ]]; then
    check_date='DATE = KO'
    color='red'
fi

I receive the error: [[date +%d-%m-%y -r: command not found. I think my code doesn't read each servers date, but I have no idea what to do. Can someone help, please? Thanks in advance for the help.

edited Aug 26, 2022 at 14:20

answered Aug 25, 2022 at 16:49

Lola

113 bronze badges

Thanks all. I fixed it. I need to use < operator, not -lt.

Lola
– Lola

2022-08-26 17:05:24 +00:00
Commented Aug 26, 2022 at 17:05

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