cat /usr/lib/cgi-bin/test00.cgi
#!/bin/bash
echo "Content-type: text/html"
cat /tmp/file
results is:
one two three four
How format output like a bash script (with newline)?
one
two
three
four
2 Answers
Here you can use both html and UNIX commands
#!/bin/bash
echo Content-type: text/html
echo ""
/bin/cat << EOM
<HTML>
<HEAD><TITLE>File Output: /tmp/file </TITLE>
</HEAD>
<BODY bgcolor="#cccccc" text="#000000">
<HR SIZE=5>
<H1>File Output: /tmp/file </H1>
<HR SIZE=5>
<P>
<SMALL>
<PRE>
EOM
/bin/cat /tmp/file
CAT << EOM
</PRE>
</SMALL>
<P>
</BODY>
</HTML>
EOM
Comments
Text in HTML is a subject of https://developer.mozilla.org/en-US/docs/Glossary/Inline-level_content so all white-spaces (including new lines) are replaced with a single (or more depending on alignment) space.
To alter rendering you enclose text into another HTML elements with assigned rendering model:
<div>line 1</div>
<div>line 2</div>
or:
<pre>
line 1
line 2
</pre>
Bash has convenient here-document syntax << to code above:
#!/bin/bash
cat <<EOF
Content-Type: text/html
<pre>
line 1
line 2
</pre>
EOF
Alternatively you could use Content-Type text/plain to preserve original text formatting:
#!/bin/bash
cat <<EOF
Content-Type: text/plain
line 1
line 2
EOF
text/plaininstead oftext/html?one two three fourprinted? And where is theechostringContent-type: text/htmlContext-typeis part of the HTTP header and as such not directly visible. The rest is apparently the content of/tmp/file.