Strange response from IIS

[Roman Rusakov]

Dear all. Please help me to understand. I'm doing a simple http get request with webinject and getting something like this in http.log:

<.h.t.m.l.>.

.

.<.h.e.a.d.>.<.i.>.S.o.m.e.. .t.e.x.t.. .2..1.5...0.<./.i.>.,.

.

.<.h.1.>..<.f.o.n.t. .c.o.l.o

.

.<.l.i.>.P.r.o.f.i.l.e. .'.

.

.<./.u.l.>.

.

.<./.h.t.m.l.>.

.

.

Waht are all those dots in response?

P.S. I tried in 1.41 nagios version and in 1.84 from github. 

[Karsten Sievert]

Hi!

You may want to check if the server is responding with a UTF-16 encoded page.
In that case, the dots represent the upper byte of each 2-byte character
(usually null bytes). Hope this helps.


-K

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[Roman Rusakov]

Thank you very much  KarstenSie! Yes it is in utf-16. 

But i can't understand why I can get this page in normal view using a simple script - 

require LWP::UserAgent;

$useragent = LWP::UserAgent->new;

$useragent->agent('WebInject');

$useragent->max_redirect('0');

$request = new HTTP::Request('GET',"https://some.url/status");

$response = $useragent->request($request);

print $response->as_string; print "\n\n";

All commands I just copied from webinject.pl as is.

So maybe I cant get normaly encoded content from webinject.pl too? But I totaly don't understand in what string of webinject.pl should I change something?

вторник, 9 сентября 2014 г., 17:26:27 UTC+3 пользователь KarstenSie написал:

[Karsten Sievert]

Hi, Roman,

I'm guessing here, but it looks like in this line,
$response = $useragent->request($request);
the variale $response contains UTF-16, and the next line is naïvely printing it as_string.

print $response->as_string; print "\n\n";

But before it can be printed, a conversion has to be performed.
Here is where my knowledge ends. Neither do I know how to detect this situatioon,
nor do I know how to convert from UTF-16 to UTF-8 or latin-1 (whatever you need,
UTF-8 preferred) in Perl.

Wikipedia has great articles about Unicode character representation and it's UTF-16/8 encoding.
You will probably have to read them until you understand the topic -- it took me several reads
to wrap my head around it.

I understand this: Webinject produces output in plain ASCII, which is compatible to both
UTF-8 and Latin-*. So inserting sniplets from UTF-8 web pages makes the output UTF-8,
inserting sniplets in Latin-* makes the output Latin-*. But sniplets in UTF-16 are
incompatible and need to be converted to UTF-8, so that the output is legal UTF-8.

Anybody else who can fill in here and help Roman or fix the code? I am out.


Regards
-Karsten

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