Re: [webmin-devel] ajax with webmin

I'm no expert here, but I would get a protocol analyzer (Wireshark) and/or =
tcpdump and look at the packet stream that is being sent by an application =
(browser) that does work with your embedded application.

At least you'll know what a "well-formed" HTTP message looks like so that y=
ou can adjust your code accordingly.  You can also look at what is actually=
 being sent by Webmin.  Maybe something is being altered before it is sent.

Finally, you could try transmitting the message with curl or wget ( I can't=
 really tell details, but I know they can do that) to see if it appropriate=
ly formatted.

Michael Peoples (mp4783)
iGEMS COE, Deployment, Engineering, Application Support and Security
Global Service Assurance, M5
AT&T Business Solutions
Office:=A0+1 614-886-0923
Mobile: +1 614-886-0923

Senior Systems Manager
[email protected]

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-----Original Message-----
From: Krause Felix [mailto:[email protected]] =

Sent: Tuesday, July 23, 2013 2:58 AM
To: [email protected]
Subject: [webmin-devel] ajax with webmin

Hi everyone,

I am implementing a webmin module for monitoring an embedded system. The we=
bmin installation is primarily used to administrate the OS, but should also=
 be able to show the current status of the main application running on it. =
I need to use AJAX to automatically update the visualization of some I/O ch=
annels.

Now the application has a RESTful, JSON-based interface for accessing its s=
tatus. The problem is that it does not do any authentication, so it is reac=
hable only from localhost for security reasons. My Webmin module retrieves =
information from there and renders it. For the AJAX requests, the Webmin mo=
dule should act like a proxy and just pipe through the content retrieved fr=
om the application. I tried the following in a script io.cgi as part of my =
Webmin module:

my $client  =3D HTTP::Client->new();
my $content =3D $client->get("http://127.0.0.1:8888/io");

print "HTTP/1.1 200 OK$CRLF";
print "Content-Type: text/json$CRLF";
print "Content-Length: " + length($content);
print "$CRLF$CRLF$content";

This does not work; when I try to retrieve /myModule/io.cgi, I get:

HTTP/1.0 500 Bad Header
Server: MiniServ/1.620
Date: Tue, 23 Jul 2013 06:07:06 GMT
Content-type: text/html; Charset=3Diso-8859-1
Connection: close

Is it possible to do this with Webmin?

Regards,
Felix

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