Encapsulating output of CURL and/or WGET Post: 302706851

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Top Forums Shell Programming and Scripting Encapsulating output of CURL and/or WGET Post 302706851 by SkySmart on Thursday 27th of September 2012 01:59:17 PM

09-27-2012

Registered User

Quote:

Originally Posted by Corona688

How about just letting it print instead of continually cramming everything into backticks? You don't have to always have to do that.

Also, how about checking their return codes instead of grepping their output? Every process you create returns an error code for success or failure, and wget is not an exception. If it fails to download a page, it willl tell you so directly. There's no need to grep for 'error' in the output.

If you're downloading multiple pages and wish to see which succeeded via script, wget has the -nv option, which outputs success or failure for individual files in a simple line-by-line list.

The real problem is, they're not one thing, they're two streams. stdout is used for data, stderr is used for errors.

If you want them both to go to stdout: wget ... 2>&1

thank you for the response.

the task i often have to deal with is, some clients request that a specific URL be curled/wgetted and in the output returned, they want to make sure that there is a certain string(s) contained in it.

so in the previous wget example i gave (its just an example), some clients may want to make sure the words "HTTP request sent, awaiting response" is found in the output. in such a case, just checking for the exit code is not good enough. it helps if, when the check alerts, it also contains the full error message.

lets say the exit code is a non-zero. it would help tremendously to actually be able to see what the failure was.

for instance, after running a wget on a URL, the following was returned:

Code:

<detail><vXMLVersion>0.0.1</vXMLVersion><addressAndMailPieceInformation><vError>Fatal exception during validationjava.lang.NullPointerException</vError></addressAndMailPieceInformation></detail>

Now, this isn't the typical response. So when the URL check was run and got back this error response, it would help if I can actually show the entire message to the output of the GUI. its very difficult putting this response in a variable and outputting it out the way it alerted.

see what i mean?

SkySmart

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LEARN ABOUT DEBIAN

gedcom::webservices

Gedcom::WebServices(3pm)				User Contributed Perl Documentation				  Gedcom::WebServices(3pm)

NAME

       Gedcom::WebServices - Basic web service routines for Gedcom.pm

       Version 1.16 - 24th April 2009

SYNOPSIS

	wget -qO - http://www.example.com/ws/plain/my_family/i9/name

DESCRIPTION

       This module provides web service access to a GEDCOM file in conjunction with mod_perl.  Using it, A request for imformation can be made in
       the form of a URL specifying the GEDCOM file to be used, which information is required and the format in which the information is to be
       delivered.  This information is then returned in the specified format.

       There are currently three supported formats:

       o   plain - no markup

       o   XML

       o   JSON

   URLs
       The format of the URLs used to access the web services are:

	$BASEURL/$FORMAT/$GEDCOM/$XREF/requested/information
	$BASEURL/$FORMAT/$GEDCOM?search=search_criteria

       BASEURL
	   The base URL to access the web services.

       FORMAT
	   The format in which to return the results.

       GEDCOM
	   The name of the GEDCOM file to use (the extension .ged is assumed).

       XREF
	   The xref of the record about which information is required.	XREFs can be obtained initially from a search, and subsequently from
	   certain queries.

       requested/information
	   The information requested.  This is in the same format as that taken by the get_value method.

       search_criteria
	   An individual to search for.  This is in the same format as that taken by the get_individual method.

EXAMPLES

	$ wget -qO - 'http://pjcj.sytes.net:8585/ws/plain/royal92?search=elizabeth_ii'
	/ws/plain/royal92/I52

	$ wget -qO - http://pjcj.sytes.net:8585/ws/plain/royal92/I52
	0 @I52@ INDI
	1   NAME Elizabeth_II Alexandra Mary/Windsor/
	1   TITL Queen of England
	1   SEX F
	1   BIRT
	2     DATE 21 APR 1926
	2     PLAC 17 Bruton St.,London,W1,England
	1   FAMS @F14@
	1   FAMC @F12@

	$ wget -qO - http://pjcj.sytes.net:8585/ws/plain/royal92/I52/name
	Elizabeth_II Alexandra Mary /Windsor/

	$ wget -qO - http://pjcj.sytes.net:8585/ws/plain/royal92/I52/birth/date
	21 APR 1926

	$ wget -qO - http://pjcj.sytes.net:8585/ws/plain/royal92/I52/children
	/ws/plain/royal92/I58
	/ws/plain/royal92/I59
	/ws/plain/royal92/I60
	/ws/plain/royal92/I61

	$ wget -qO - http://pjcj.sytes.net:8585/ws/json/royal92/I52/name
	{"name":"Elizabeth_II Alexandra Mary /Windsor/"}

	$ wget -qO - http://pjcj.sytes.net:8585/ws/xml/royal92/I52/name
	<NAME>Elizabeth_II Alexandra Mary /Windsor/</NAME>

	$ wget -qO - http://pjcj.sytes.net:8585/ws/xml/royal92/I52
	<INDI ID="I52">
	  <NAME>Elizabeth_II Alexandra Mary/Windsor/</NAME>
	  <TITL>Queen of England</TITL>
	  <SEX>F</SEX>
	  <BIRT>
	    <DATE>21 APR 1926</DATE>
	    <PLAC>17 Bruton St.,London,W1,England</PLAC>
	  </BIRT>
	  <FAMS REF="F14"/>
	  <FAMC REF="F12"/>
	</INDI>

CONFIGURATION

       Add a section similar to the following to your mod_perl config:

	PerlWarn On
	PerlTaintCheck On

	PerlPassEnv GEDCOM_TEST

	<IfDefine GEDCOM_TEST>
	    <Perl>
		$Gedcom::TEST = 1;
	    </Perl>
	</IfDefine>

	<Perl>
	    use Apache::Status;

	    $ENV{PATH} = "/bin:/usr/bin";
	    delete @ENV{"IFS", "CDPATH", "ENV", "BASH_ENV"};

	    $Gedcom::DATA = $Gedcom::ROOT;  # location of data stored on server

	    use lib "$Gedcom::ROOT/blib/lib";
	    use Gedcom::WebServices;

	    my $handlers =
	    [ qw
	      (
		  plain
		  xml
		  json
	      )
	    ];

	    eval Gedcom::WebServices::_set_handlers($handlers);
	    # use Apache::PerlSections; print STDERR Apache::PerlSections->dump;
	</Perl>

	PerlTransHandler Gedcom::WebServices::_parse_uri

BUGS

       Very probably.

       See the BUGS file.  And the TODO file.

VERSION

       Version 1.16 - 24th April 2009

LICENCE

       Copyright 2005-2009, Paul Johnson (paul@pjcj.net)

       This software is free.  It is licensed under the same terms as Perl itself.

       The latest version of this software should be available from my homepage: http://www.pjcj.net

perl v5.14.2							    2012-04-12						  Gedcom::WebServices(3pm)