How to print formatted python output for javascript?

Question

I am trying to capture the stdout when I print on shell. I get output like this:

************* STARTING healthmonitor ***********************

Aug 28, 2014 5:17:58 AM org.rzo.yajsw.os.posix.PosixService getPid
INFO: wrapper pid file: /var/run/wrapper.healthmonitor.pid
Aug 28, 2014 5:17:58 AM org.rzo.yajsw.os.posix.PosixService startProcess
INFO: calling "/usr/bin/java" "-Dwrapper.pidfile=/va/run/wrapper.healthmonitor.pid"              
Aug 28, 2014 5:17:58 AM org.rzo.yajsw.os.posix.PosixService getPid
INFO: wrapper pid file: /var/run/wrapper.healthmonitor.pid
Aug 28, 2014 5:18:00 AM org.rzo.yajsw.os.posix.PosixService getPid
INFO: wrapper pid file: /var/run/wrapper.healthmonitor.pid

However, when I use the same output to print on a webpage, the format gets jumbled like this:

********* STARTING healthmonitor ******************* Aug 28, 2014 4:48:23 AM org.rzo.yajsw.os.posix.PosixService getPid INFO: wrapper pid file: /var/run/wrapper.healthmonitor.pid Aug 28, 2014 4:48:23 AM org.rzo.yajsw.os.posix.PosixService startProcess INFO: calling "/usr/bin/java" "-Dwrapper.pidfile=/var/run/wrapper.healthmonitor.pid" "-Dwrapper.service=true" "-Dwrapper.visible=false" "-Djna_tmpdir=/app/sterling/jsw/healthmonitor/bin/../tmp" "-jar" "/app/sterling/jsw/healthmonitor/wrapper.jar" "-c" "/app/sterling/jsw/healthmonitor/conf/wrapper.conf" Aug 28, 2014 4:48:23 AM org.rzo.yajsw.os.posix.PosixService getPid INFO:

The python script which prints this is called in a java script file using cgi python way of calling. And in the python script, this is how its printed.

import cgi, cgitb

print("Content-type: text/html\n\n")
print """
<html><head></head>
<body>
<br>
"""
print nova.servers.get_console_output(VMID)

print """
</body></html>
"""

The "print nova.servers.get_console_output(VMID)" is the one that produces the console output.

Thanks for any help you can offer.

@shaktimaan, did you mean a <pre>? I don't believe newlines are honored in a <p>, but I know for sure they are in a <pre>. An alternative would be print nova.servers.get_console_output(VMID).replace("\n", "<br>") — sberry
– sberry, Commented Aug 28, 2014 at 6:00

sberry · Accepted Answer · 2014-08-28 06:12:05Z

1

Newline characters (\n) are not translated to new lines when rendered as HTML. You can use a <pre> tag (preformatted) to allow them to have meaning when being rendered.

...
print """
<html><head></head>
<body>
<br>
<pre>
"""
print nova.servers.get_console_output(VMID)

print """
</pre>
</body></html>
"""

Or you could replace newline characters with a <br>, like so:

print nova.servers.get_console_output(VMID).replace("\n", "<br>")

Either one should do what you want.

edited Aug 28, 2014 at 6:12

answered Aug 28, 2014 at 6:05

sberry

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2 Comments

shaktimaan Over a year ago

You missed the closing </pre>

Sreeram K Over a year ago

sberry, I can't express enough how good it looks now! Thank you so much!! Awesome!!

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