Perl and LWP not authenticating - perl

I'm trying to get an LWP request working to an https server. I have been given a user & pass, advised to use basic authentication. I've tried various chunks of code, and all seem to get an authentication error. My current code is...
use warnings;
use strict;
use Data::Dumper;
use LWP;
my $ua = LWP::UserAgent->new( keep_alive => 1 );
##also tried by $ua->credentials('domain','','user','pass');
##not sure if I need 'realm' or how I get it, as no popup on screen.
my $request = HTTP::Request->new( GET => "https://my.url.com/somepath/" );
$request->authorization_basic('myuser','mypass');
$request->header( 'Cache-Control' => 'no-cache' );
print $response->content;
print Dumper $response;
The server gives a security error, but if I look at a dump of $response, I see the following...
'_rc' => '401',
'_headers' => bless( { .... lots of stuff
'title' => 'Security Exception',
'client-warning' => 'Missing Authenticate header',
'client-ssl-socket-class' => 'IO::Socket::SSL',
...
'expires' => '-1'
}, 'HTTP::Headers' ),
'_msg' => 'Unauthorized',
'_request' => bless( {
'_content' => '',
'_uri' => bless( do{\(my $o = 'https:theurlabove')}, 'URI::https' ),
'_method' => 'GET',
'_uri_canonical' => $VAR1->{'_request'}{'_uri'}
'_headers' => bless( {
'user-agent' => 'libwww-perl/6.04',
'cache-control' => 'no-cache',
'authorization' => 'Basic dzx..........'
}, 'HTTP::Headers' ),
I'm trying to understand whats happening, it looks like in the original request, it has the headers in there, but in the response, its saying I'm 'Missing Authenticate Header'.
Is there something amiss with the code, or something I'm misunderstanding with the request/respinse ?
Thanks.

The "Missing Authenticate header" message is coming from LWP itself. This means that it couldn't find an authenticate header in the target response. This might mean that your proxy settings are misconfigured, if you have anything like that.

I don't know if this is what you are looking for but I came across the same problem trying to authenticate to a webpage and had to solve it with WWW::Mechanize. I had to go to the first page and login then request the page I wanted.
use WWW::Mechanize;
my $loginPage = "http://my.url.com/login.htm"; # Authentication page
my $mech = WWW::Mechanize->new(); # Create new brower object
$mech->get($loginPage); # Go to login page
$mech->form_name('LogonForm'); # Search form named LogonForm
$mech->field("username", myuser); # Fill out username field
$mech->field("password", mypass); # Fill out password field
$mech->click("loginloginbutton"); # submit form
$mech->get("http://my.url.com/somepath/"); # Get webpage
# Some more code here with $mech->content()

Related

I can't connect using an api

I'm quite new to API's so I don't know if this should be more straight forward.
I write the following perl script
use strict;
use LWP::UserAgent;
require HTTP::Request;
my $request = HTTP::Request->new(GET => 'http://api.elsevier.com/content/ev/results?apiKey=1234&query=stress&database=c&updateNumber=1&pageSize=1');
my $ua = LWP::UserAgent->new;
my $response = $ua->request($request);
then when I get my response and print it in the debugger I get the following
HTTP::Response=HASH(0x9aedff8)
'_content' => '{"service-error":{"status":{"statusCode":"AUTHENTICATION_ERROR","statusText":"Requestor configuration settings insufficient for access to this resource."}}}'
'_headers' => HTTP::Headers=HASH(0x9aedfe8)
'allow' => 'GET'
'client-date' => 'Wed, 29 Mar 2017 08:08:25 GMT'
'client-peer' => '198.185.19.118:80'
'client-response-num' => 1
'content-length' => 156
'content-type' => 'application/json;charset=UTF-8'
'date' => 'Wed, 29 Mar 2017 08:08:24 GMT'
'p3p' => 'CP="IDC DSP LAW ADM DEV TAI PSA PSD IVA IVD CON HIS TEL OUR DEL SAM OTR IND OTC"'
'server' => 'api.elsevier.com 9999'
'vary' => 'Origin'
'x-cnection' => 'close'
'x-els-apikey' => 'e688c9db4db0386581dbe4c4dda46164'
'x-els-reqid' => '0000015b190d89fe-a0d0'
'x-els-status' => 'AUTHENTICATION_ERROR(Requestor configuration settings insufficient for access to this resource.)'
'x-els-transid' => 'cbf787b4-d171-4e35-8237-8cab3c931205'
'x-re-ref' => '1 1490774904423414'
'_msg' => 'Forbidden'
'_protocol' => 'HTTP/1.1'
'_rc' => 403
'_request' => HTTP::Request=HASH(0x9fc3000)
'_content' => ''
'_headers' => HTTP::Headers=HASH(0x9ae73e0)
'user-agent' => 'libwww-perl/5.831'
'_method' => 'GET'
'_uri' => URI::http=SCALAR(0x9e25188)
-> 'http://api.elsevier.com/content/ev/results?apiKey=e688c9db4db0386581dbe4c4dda46164&query=stress&database=c&updateNumber=1&pageSize=1'
'_uri_canonical' => URI::http=SCALAR(0x9e25188)
-> REUSED_ADDRESS
one of the notable lines is
x-els-status' => 'AUTHENTICATION_ERROR(Requestor configuration settings insufficient for access to this resource.)'
I don't know how to get a proper response text. I tried searching their websites for examples, but I can't seem to get it. as well I'm not sure if the key is only for scopus but not engineering village which I'm trying to use.
There website is here. https://dev.elsevier.com/index.html?utm_expid=89327795-0.AtRZzToKQ2u1mZEyQ3n7OQ.0&utm_referrer=https%3A%2F%2Fdev.elsevier.com%2Ftecdoc_ev_retrieval_request.html
any help would be appreciated
To get the text out of your response, you need to call the $response->decoded_content method. That will give you the JSON string that you can see in _content in your debug output. I've indented it to make it easier to read.
{
"service-error" : {
"status" : {
"statusCode" : "AUTHENTICATION_ERROR",
"statusText" : "Requestor configuration settings insufficient for access to this resource."
}
}
}
You can use the JSON module to decode this into a Perl data structure.
use JSON 'from_json';
my $res = $ua->request($req);
my $json = from_json( $res->decoded_content );
The error message you get back clearly states that you are not authenticated properly. I've looked at this guide from the documentation you mentioned. It seems that the apiKey URL param works, if you have the right type of account. You should check with whoever made that account for you, or if that was you and you're not sure, the account manager at that service that is working with you. They'll tell you if you are using the right API key, and if this method of authentication works for you.
Since this API also offers to use a custom header X-ELS-APIKey: [apikey] for the authentication I would suggest using that. Your API key is a secret, and you shouldn't share it with anyone. It's like a password. If you put it into the URL, it might show up in log files. But as a header, it does usually not.
This is how you add a custom header to an HTTP request. Make sure you don't have the apiKey URL param any more if you do this.
my $req = HTTP::Request->new( GET => $url ); # no apiKey=123 here!
$req->header( 'X-ELS-APIKey' => 123 );
Now as a last step, you should check the HTTP response code of the response. A 200 (or most other codes that start with 2) means the request was successful. The 403 that you are getting back means unauthorized, which also hints at that you are not authenticated correctly.
Since it seems that this API returns JSON in both success and failure cases, you might need to decode it for both. If you care to examine the failure response, that makes sense. If not, you can skip that part. To do this, use $res->is_success, which is also used in the synopsis of the LWP::UserAgent documentation.
use strict;
use warnings;
use LWP::UserAgent;
use HTTP::Request;
use JSON 'from_json';
my $ua = LWP::UserAgent->new;
my $req = HTTP::Request->new( GET => 'http://api.elsevier.com/content/ev/results?query=stress&database=c&updateNumber=1&pageSize=1' );
$req->header( 'X-ELS-APIKey' => 123 );
if ($req->is_success) {
my $json = from_json( $res->decoded_content );
# ... do stuff with the response
} else {
# something went wrong
}

Logging into Jenkins via Perl script

I am able to change a build's description with the following program. This will change the build's description to "FOO FOO FOO". Unfortunately, my login doesn't work. Right now, this test Jenkins build server has no security on it. However, on our regular Jenkins server, you need to be logged in to change a build's description.:
#! /usr/bin/env perl
use 5.12.0;
use warnings;
use LWP::UserAgent;
use HTTP::Request::Common qw(POST);
use Data::Dumper;
use constant {
JENKINS_BASE => "http://build.vegibank.com/",
USER_ID => "buildguy",
PASSWORD => "swordfish",
};
use constant {
LOGIN_URL => JENKINS_BASE . '/j_acegi_security_check',
JOB_URL => JENKINS_BASE . '/job',
SUBMIT_DESCRIPTION => 'submitDescription',
};
my $job_number = 4;
my $job_name = "proginator-2.0";
my $description = "FOO FOO FOO";
my $user_agent = LWP::UserAgent->new or die qq(Can't get User Agent);
#
# My Login Stuff (but it doesn't do anything w/ security off
#
my $response = $user_agent->request (
POST LOGIN_URL,
[
j_username => USER_ID,
j_password => PASSWORD,
],
);
$response = $user_agent->request (
POST "#{[JOB_URL]}/$job_name/$job_number/#{[SUBMIT_DESCRIPTION]}",
[
description => "$description",
],
);
I'm trying to connect to the Jenkins login session, but I don't believe I'm doing it quite right. When I attempt to login, I get a 302 response and the following dump of my response object:
$VAR1 = bless( {
'_protocol' => 'HTTP/1.1',
'_content' => '',
'_rc' => '302',
'_headers' => bless( {
'connection' => 'close',
'client-response-num' => 1,
'set-cookie' => 'JSESSIONID=1D5DF6FAF8714B2ACA4D496FBFE6E983; Path=/jenkins/; HttpOnly',
'location' => 'http://build.vegicorp.com/;jsessionid=1D5DF6FAF8714B2ACA4D496FBFE6E983',
'date' => 'Mon, 13 May 2013 20:02:35 GMT',
'client-peer' => '10.10.21.96:80',
'content-length' => '0',
'client-date' => 'Mon, 13 May 2013 20:02:35 GMT',
'content-type' => 'text/plain; charset=UTF-8',
'server' => 'Apache-Coyote/1.1'
}, 'HTTP::Headers' ),
'_msg' => 'Moved Temporarily',
'_request' => bless( {
'_content' => 'j_username=buildguy&j_password=swordfish',
'_uri' => bless( do{\(my $o = 'http://build.vegicorp.com/j_acegi_security_check')}, 'URI::http' ),
'_headers' => bless( {
'user-agent' => 'libwww-perl/6.03',
'content-type' => 'application/x-www-form-urlencoded',
'content-length' => 42
}, 'HTTP::Headers' ),
'_method' => 'POST',
'_uri_canonical' => $VAR1->{'_request'}{'_uri'}
}, 'HTTP::Request' )
}, 'HTTP::Response' );
I figure I must be hitting a valid page since I'm getting a 302 code, but my fields might not be correct (or I'm going to the wrong page).
Can anyone help?
My authorization is failing because ...what is the technical term? Oh yeah... "doing it all wrong."
After Googling and getting a lot of unhelpful junk, I, on a lark, decided to see if the Jenkins website might have something on this. And, it did right under a page called Authenticating scripted clients. In fact, they even give a Perl LWP example for a scripted client.
Ha ha, I was trying too hard. It seems that Jenkins will use the basic HTTP authentication mechanism, and I don't have to go through conniptions trying to figure out how their login form works. Apparently, Jenkins is simplifying the basic authentication mechanism for you even if your authentication mechanism is far from basic -- like a good program should do.
So, all I had to do was use the basic authentication mechanism.
my $browser = LWP::UserAgent->new or die qq(Cannot get User Agent);
my $request = HTTP::Request->new;
$request->authorization_basic(USER_ID, PASSWORD);
$request->method("GET");
$request->url("$jenkins_url");
my $response = $browser->request($request);
if ( not $response->is_success ) {
die qq(Something went horribly wrong...);
}
I've seen the redirect when the login is successful -- it sets the session cookie and redirects you to the main page.
Your post might be failing because the UA object isn't persisting the session cookie. Per the documentation, 'The default is to have no cookie_jar, i.e. never automatically add "Cookie" headers to the requests.' Try:
my $ua = LWP::UserAgent->new( cookie_jar => HTTP::Cookies->new() );
To store and reuse your session for the description change post.
(Also, credentials are visible in your header dump, may want to edit... Edit: I'm an idiot, they're in your constants too and're likely fake.)

Unable to login into a site using www:Mechanize

I am using WWW:Mechanize to try to login to a site.
Code
use WWW::Mechanize;
my $mech = WWW::Mechanize->new();
$mech->get("https://www.amazon.com/gp/css/homepage.html/");
$mech->submit_form(
form_name => 'yaSignIn',
fields => {
email => 'email',
qpassword=> 'pass'
}
);
print $mech->content();
However it is not being logged into the site. What am i doing wrong. The website redirects and says please enable cookies to continue. How do i do that .
Try putting this block before your get.
$mech->cookie_jar(
HTTP::Cookies->new(
file => "cookies.txt",
autosave => 1,
ignore_discard => 1,
)
);
SuperEdit2: I just tried this myself and it seemed to work. Give it a try.(changed the form number to 3 and added an agent alias)
use strict;
use warnings;
use WWW::Mechanize;
# Create a new instance of Mechanize
my $bot = WWW::Mechanize->new();
$bot->agent_alias( 'Linux Mozilla' );
# Create a cookie jar for the login credentials
$bot->cookie_jar(
HTTP::Cookies->new(
file => "cookies.txt",
autosave => 1,
ignore_discard => 1,
)
);
# Connect to the login page
my $response = $bot->get( 'https://www.amazon.com/gp/css/homepage.html/' );
# Get the login form. You might need to change the number.
$bot->form_number(3);
# Enter the login credentials.
$bot->field( email => 'email' );
$bot->field( password => 'pass' );
$response = $bot->click();
print $response->decoded_content;

POST web authentication of Nest Thermostat site in Perl (attempting to convert from Ruby)

there is a bit of code I'm trying to replicate in Perl using either LWP::UserAgent or WWW::Mechanize from an existing script.
The original script actually does more than I'm looking to do. I'd just like to log into the Nest website (the part I need help with) and then parse out some data for historical logging (I'm good there).
My current script I would expect to work, but I'm not sure if the authResult/access_token from the Ruby example us actually understood/used by either Perl module.
My code in Perl:
#!/usr/bin/perl
use WWW::Mechanize;
#use HTTP::Request::Common qw(POST);
use HTTP::Cookies;
use LWP::UserAgent;
use Data::Dumper;
use CGI;
my $email; #stores our mail
my $password; #stores our password
my $user_agent = 'Nest/1.1.0.10 CFNetwork/548.0.4';
$email = "email#email";
$password = "mypassword";
my #headers = (
'User-Agent' => 'Nest/1.1.0.10 CFNetwork/548.0.4',
'X-nl-user-id' => $email,
'X-nl-protocol-version' => '1',
'Accept-Language' => 'en-us',
'Connection' => 'keep-alive',
'Accept' => '*/*'
);
# print "Content-type: text/html\n\n";
my $cookie = HTTP::Cookies->new(file => 'cookie',autosave => 1,);
my $browser = WWW::Mechanize->new(cookie_jar => $cookie, autocheck => 1,);
# tell it to get the main page
$browser->get("https://home.nest.com/user/login");
print Dumper($browser->forms);
# okay, fill in the box with the name of the
# module we want to look up
$browser->form_number(1);
$browser->field("username", $email);
$browser->field("password", $password);
$browser->submit();
print $browser->content();
When I submit the form, I just get the same page returned back to me, and I don't know what exactly is causing Nest to not like what I'm submitting. There are two additional fields in the form on their log-in page:
'inputs' => [
bless( {
'maxlength' => '75',
'/' => '/',
'value_name' => 'E-mail address',
'name' => 'username',
'id' => 'id_username',
'type' => 'text'
}, 'HTML::Form::TextInput' ),
bless( {
'/' => '/',
'value_name' => 'Password',
'name' => 'password',
'id' => 'id_password',
'type' => 'password',
'minlength' => '6'
}, 'HTML::Form::TextInput' ),
bless( {
'readonly' => 1,
'/' => '/',
'value_name' => '',
'value' => '',
'name' => 'next',
'type' => 'hidden'
}, 'HTML::Form::TextInput' ),
bless( {
'readonly' => 1,
'/' => '/',
'value_name' => '',
'value' => 'dbbadca7910c5290a13d30785ac7fb79',
'name' => 'csrfmiddlewaretoken',
'type' => 'hidden'
}, 'HTML::Form::TextInput' )
Do I need to use the csrfmiddlewaretoken value in each submission? It appears to change. I thought getting a cookie upon a successful login would be enough.
Any suggestions on what I'm doing wrong?
Shot in the blue:
perl -E'use warnings; $email = "email#email"; say "<$email>"'
Possible unintended interpolation of #email in string at -e line 1.
<email>
I suspect it fails because the form gets the wrong user name, print it out to confirm. Always enable the pragmas strict and warnings to make many common mistakes visible.

How do I access a value of a nested Perl hash?

I am new to Perl and I have a problem that's very simple but I cannot find the answer when consulting my Perl book.
When printing the result of
Dumper($request);
I get the following result:
$VAR1 = bless( {
'_protocol' => 'HTTP/1.1',
'_content' => '',
'_uri' => bless( do{\(my $o = 'http://myawesomeserver.org:8081/counter/')}, 'URI::http' ),
'_headers' => bless( {
'user-agent' => 'Mozilla/5.0 (X11; U; Linux i686; en; rv:1.9.0.4) Gecko/20080528 Epiphany/2.22 Firefox/3.0',
'connection' => 'keep-alive',
'cache-control' => 'max-age=0',
'keep-alive' => '300',
'accept' => 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
'accept-language' => 'en-us,en;q=0.5',
'accept-encoding' => 'gzip,deflate',
'host' => 'localhost:8081',
'accept-charset' => 'ISO-8859-1,utf-8;q=0.7,*;q=0.7'
}, 'HTTP::Headers' ),
'_method' => 'GET',
'_handle' => bless( \*Symbol::GEN0, 'FileHandle' )
}, 'HTTP::Server::Simple::Dispatched::Request' );
How can I access the values of '_method' ('GET') or of 'host' ('localhost:8081').
I know that's an easy question, but Perl is somewhat cryptic at the beginning.
Narthring has it right as far as the brute force method. Nested hashes are addressed by chaining the keys like so:
$hash{top_key}{next_key}{another_key}; # for %hash
# OR
$hash_ref->{top_key}{next_key}{another_key}; # for refs.
However since both of these "hashes" are blessed objects. It might help reading up on HTTP::Server::Simple::Dispatched::Request, which can tell you that it's a HTTP::Request object and looking at HTTP::Request section on the header and method methods, tells you that the following do the trick:
my $method = $request->method();
my $host = $request->header( 'host' );
Really, I recommend you get the firefox search plugin called Perldoc Module::Name and when you encounter Dumper output that says "bless ... 'Some::Module::Name'" you can just copy and paste it into the search plugin and read the documentation on CPAN.