| 1 | #############################################################################
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| 2 | #
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| 3 | # activate.pm -- functions to get the GS library URL, ping the library URL,
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| 4 | # activate and deactivate a collection.
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| 5 | #
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| 6 | # A component of the Greenstone digital library software
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| 7 | # from the New Zealand Digital Library Project at the
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| 8 | # University of Waikato, New Zealand.
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| 9 | #
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| 10 | # Copyright (C) 1999 New Zealand Digital Library Project
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| 11 | #
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| 12 | # This program is free software; you can redistribute it and/or modify
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| 13 | # it under the terms of the GNU General Public License as published by
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| 14 | # the Free Software Foundation; either version 2 of the License, or
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| 15 | # (at your option) any later version.
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| 16 | #
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| 17 | # This program is distributed in the hope that it will be useful,
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| 18 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 20 | # GNU General Public License for more details.
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| 21 | #
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| 22 | # You should have received a copy of the GNU General Public License
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| 23 | # along with this program; if not, write to the Free Software
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| 24 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 25 | #
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| 26 | ###############################################################################
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| 27 |
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| 28 | package servercontrol;
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| 29 |
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| 30 |
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| 31 | use strict;
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| 32 | no strict 'refs'; # allow filehandles to be variables and vice versa
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| 33 | no strict 'subs'; # allow barewords (eg STDERR) as function arguments
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| 34 |
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| 35 | # Greenstone includes
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| 36 | use printusage;
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| 37 | use parse2;
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| 38 |
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| 39 |
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| 40 | # The perl library imports below are used by deprecated methods config_old(), is_URL_active() and pingHost()
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| 41 | # If the following library imports are not supported by your perl installation, comment out these
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| 42 | # imports and move the methods config_old(), is_URL_active() and pingHost() out to a temporary file.
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| 43 | use HTTP::Response;
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| 44 | use LWP::Simple qw($ua !head); # import useragent object as $ua from the full LWP to use along with LWP::Simple
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| 45 | # don't import LWP::Simple's head function by name since it can conflict with CGI:head())
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| 46 | #use CGI qw(:standard); # then only CGI.pm defines a head()
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| 47 | use Net::Ping;
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| 48 | use URI;
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| 49 |
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| 50 |
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| 51 | sub new
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| 52 | {
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| 53 | my $class = shift(@_);
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| 54 |
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| 55 | my ($qualified_collection, $site, $verbosity, $build_dir, $index_dir, $collect_dir, $library_url, $library_name) = @_;
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| 56 |
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| 57 | # library_url: to be specified on the cmdline if not using a GS-included web server
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| 58 | # the GSDL_LIBRARY_URL env var is useful when running cmdline buildcol.pl in the linux package manager versions of GS3
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| 59 |
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| 60 | my $self = {'build_dir' => $build_dir,
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| 61 | 'index_dir' => $index_dir,
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| 62 | 'collect_dir' => $collect_dir,
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| 63 | 'site' => $site,
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| 64 | 'qualified_collection' => $qualified_collection,
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| 65 | #'is_persistent_server' => undef,
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| 66 | 'library_url' => $library_url || $ENV{'GSDL_LIBRARY_URL'} || undef, # to be specified on the cmdline if not using a GS-included web server
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| 67 | 'library_name' => $library_name,
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| 68 | #'gs_mode' => "gs2",
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| 69 | 'verbosity' => $verbosity || 2
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| 70 | };
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| 71 |
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| 72 | if ((defined $site) && ($site ne "")) { # GS3
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| 73 | $self->{'gs_mode'} = "gs3";
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| 74 | } else {
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| 75 | $self->{'gs_mode'} = "gs2";
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| 76 | }
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| 77 |
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| 78 | return bless($self, $class);
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| 79 | }
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| 80 |
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| 81 | ## TODO: gsprintf to $self->{'out'} in these 2 print functions
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| 82 | ## See buildcolutils.pm new() for setting up $out
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| 83 |
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| 84 | sub print_task_msg {
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| 85 | my $self = shift(@_);
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| 86 | my ($task_msg, $verbosity_setting) = @_;
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| 87 |
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| 88 | $verbosity_setting = $self->{'verbosity'} unless $verbosity_setting;
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| 89 | #$verbosity_setting = 1 unless defined $verbosity;
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| 90 | if($verbosity_setting >= 1) {
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| 91 | print STDERR "\n";
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| 92 | print STDERR "************************\n";
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| 93 | print STDERR "* $task_msg\n";
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| 94 | print STDERR "************************\n";
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| 95 | }
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| 96 | }
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| 97 |
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| 98 | # Prints messages if the verbosity is right. Does not add new lines.
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| 99 | sub print_msg {
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| 100 | my $self = shift(@_);
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| 101 | my ($msg, $min_verbosity, $verbosity_setting) = @_;
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| 102 |
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| 103 | # only display error messages if the current
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| 104 | # verbosity setting >= the minimum verbosity level
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| 105 | # needed for that message to be displayed.
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| 106 |
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| 107 | $verbosity_setting = $self->{'verbosity'} unless defined $verbosity_setting;
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| 108 | $min_verbosity = 1 unless defined $min_verbosity;
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| 109 | if($verbosity_setting >= $min_verbosity) { # by default display all 1 messages
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| 110 | print STDERR "$msg";
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| 111 | }
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| 112 | }
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| 113 |
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| 114 | # Method to send a command to a GS2 or GS3 library_URL
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| 115 | # the commands used in this script can be activate, deactivate, ping,
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| 116 | # and is-persistent (is-persistent only implemented for GS2).
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| 117 | sub config {
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| 118 | my $self = shift(@_);
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| 119 | my ($command, $check_message_against_regex, $expected_error_code, $silent, $oai_servlet) = @_;
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| 120 |
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| 121 | my $library_url = $self->get_library_URL(); #$self->{'library_url'};
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| 122 | if($oai_servlet) { # if asked to contact the oaiserver servlet, then
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| 123 | # replace the library servlet name with oaiserver servlet name
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| 124 | $library_url =~ s@([^/]*?)$@$oai_servlet@;
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| 125 | }
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| 126 |
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| 127 | # Gatherer.java's configGS3Server doesn't use the site variable
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| 128 | # so we don't have to either
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| 129 |
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| 130 | # for GS2, getting the HTTP status isn't enough, we need to read the output
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| 131 | # since this is what CollectionManager.config() stipulates.
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| 132 | # Using LWP::UserAgent::get($url) for this
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| 133 |
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| 134 | if(!defined $library_url) {
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| 135 | return 0;
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| 136 | }
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| 137 | else {
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| 138 | # ampersands need to be escaped
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| 139 | # - with single quotes around it for linux for the cmd to run in bash subshell
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| 140 | # - with a ^ before it on windows for the cmd to run in a DOS prompt subshell
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| 141 | # - or the entire wget command should be nested in double quotes (single quotes don't work on windows)
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| 142 | my $wgetCommand = $command;
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| 143 |
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| 144 | my $wget_file_path = &FileUtils::filenameConcatenate($ENV{'GSDLHOME'}, "bin", $ENV{'GSDLOS'}, "wget");
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| 145 | my $tmpfilename = &util::get_tmp_filename(".html"); # random file name with html extension in tmp location in which we'll store the HTML page retrieved by wget
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| 146 |
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| 147 | # https://www.gnu.org/software/wget/manual/wget.html
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| 148 | # output-document set to - (STDOUT), so page is streamed to STDOUT
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| 149 | # timeout: 5 seconds, tries: 1
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| 150 | # wget sends status information and response code to STDERR, so redirect it to STDOUT
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| 151 | # Searching for "perl backtick operator redirect stderr to stdout":
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| 152 | # http://www.perlmonks.org/?node=How%20can%20I%20capture%20STDERR%20from%20an%20external%20command%3F
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| 153 | ##$wgetCommand = "\"$wget_file_path\" --spider -T 5 -t 1 \"$library_url$wgetCommand\" 2>&1"; # won't save page
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| 154 | #$wgetCommand = "\"$wget_file_path\" --output-document=- -T 5 -t 1 \"$library_url$wgetCommand\" 2>&1"; # THIS CAN MIX UP STDERR WITH STDOUT IN THE VERY LINE WE REGEX TEST AGAINST EXPECTED OUTPUT!!
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| 155 | $wgetCommand = "\"$wget_file_path\" --output-document=\"$tmpfilename\" -T 5 -t 1 \"$library_url$wgetCommand\" 2>&1"; # keep stderr (response code, response_content) separate from html page content
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| 156 |
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| 157 | ##print STDERR "@@@@ $wgetCommand\n";
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| 158 |
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| 159 | my $response_content = "";
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| 160 | my $response_code = undef;
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| 161 | #my $response_content = `$wgetCommand`; # Dr Bainbridge advises against using backticks for running a process. If capturing std output, use open():
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| 162 | if (open(PIN, "$wgetCommand |")) {
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| 163 | while (defined (my $perl_output_line = <PIN>)) {
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| 164 | $response_content = $response_content . $perl_output_line;
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| 165 | }
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| 166 | close(PIN);
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| 167 | } else {
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| 168 | print STDERR "servercontrol.pm::config() failed to run $wgetCommand\n";
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| 169 | }
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| 170 |
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| 171 |
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| 172 | my @lines = split( /\n/, $response_content );
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| 173 | foreach my $line (@lines) {
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| 174 | #print STDERR "@@@@ LINE: $line\n";
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| 175 | if($line =~ m@failed: Connection timed out.$@) { # linux
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| 176 | $response_code = "failed: Connection timed out.";
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| 177 | last; # break keyword in perl = last
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| 178 | }
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| 179 | elsif($line =~ m@Giving up.$@) { # windows (unless -T 5 -t 1 is not passed in)
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| 180 | $response_code = "failed: Giving up.";
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| 181 | last; # break keyword in perl = last
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| 182 | }
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| 183 | elsif($line =~ m@failed: Connection refused.$@) {
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| 184 | $response_code = "failed: Connection refused.";
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| 185 | last; # break keyword in perl = last
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| 186 | }
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| 187 | elsif($line =~ m@HTTP request sent, @) {
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| 188 | $response_code = $line;
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| 189 | $response_code =~ s@[^\d]*(.*)$@$1@;
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| 190 | last;
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| 191 | }
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| 192 | }
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| 193 |
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| 194 | if($command =~ m@ping@ && $response_code =~ m@failed: (Connection refused|Giving up)@) {
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| 195 | # server not running
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| 196 | $self->print_msg("*** Server not running. $library_url$command\n", 3);
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| 197 | &FileUtils::removeFiles($tmpfilename); # get rid of the ping response's temporary html file we downloaded
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| 198 | return 0;
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| 199 | }
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| 200 | if($response_code && (index($response_code, "200") != -1)) {
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| 201 | $self->print_msg("*** Command $library_url$command\n", 3);
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| 202 | $self->print_msg("*** HTTP Response Status: $response_code - Complete.", 3);
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| 203 |
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| 204 | # check the page content is as expected
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| 205 | #my $resultstr = $response_content;
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| 206 |
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| 207 | # The following file reading section is a candidate to use FileUtils::readUTF8File()
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| 208 | # in place of calling sysread() directly. But only if we can reason we'd be working with UTF8
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| 209 | open(FIN,"<$tmpfilename") or die "servercontrol.pm: Unable to open $tmpfilename to read ping response page...ERROR: $!\n";
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| 210 | my $resultstr;
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| 211 | # Read in the entire contents of the file in one hit
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| 212 | ##sysread(FIN, $resultstr, -s FIN);
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| 213 | # GLI GBuildProgressMonitor.hasSignalledStop() removes any lines that start with elements it doesn't recognise
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| 214 | # but we want to see the lines with HTML tags as they are the most interesting: they embed success/failure messages
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| 215 | # So read line by line from the downloaded web page and replace <> with [] so that GLI can display these lines too
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| 216 | while (my $line = <FIN>) {
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| 217 | chomp $line;
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| 218 | $line =~ s@<@[@g;
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| 219 | $line =~ s@>@]@g;
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| 220 | $resultstr .= "$line\n";
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| 221 | }
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| 222 | close(FIN);
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| 223 | &FileUtils::removeFiles($tmpfilename); # get rid of the ping response's temporary html file we downloaded
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| 224 |
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| 225 |
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| 226 | #$resultstr =~ s@.*gs_content\"\>@@s; ## only true for default library servlet
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| 227 | #$resultstr =~ s@</div>.*@@s;
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| 228 | if($resultstr =~ m/$check_message_against_regex/) {
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| 229 | $self->print_msg(" Response as expected.\n", 3);
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| 230 | $self->print_msg("@@@@@@ Got result:\n$resultstr\n", 4);
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| 231 | return 1;
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| 232 | } else {
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| 233 | # if we expect the collection to be inactive, then we'd be in silent mode: if so,
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| 234 | # don't print out the "ping did not succeed" response, but print out any other messages
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| 235 |
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| 236 | # So we only suppress the ping col "did not succeed" response if we're in silent mode
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| 237 | # But if any message other than ping "did not succeed" is returned, we always print it
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| 238 | if($resultstr !~ m/did not succeed/ || !$silent) {
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| 239 | $self->print_msg("\n\tBUT: command $library_url$command response UNEXPECTED.\n", 3);
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| 240 | $self->print_msg("*** Got message:\n$response_content.\n", 4);
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| 241 | $self->print_msg("*** Got result:\n$resultstr\n", 3);
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| 242 | }
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| 243 | return 0; # ping on a collection may "not succeed."
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| 244 | }
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| 245 | }
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| 246 | elsif($response_code && $response_code =~ m@^(4|5)\d\d@) { # client side errors start with 4xx, server side with 5xx
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| 247 | # check the page content is as expected
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| 248 | if(defined $expected_error_code && $response_code =~ m@^$expected_error_code@) {
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| 249 | $self->print_msg(" Response status $response_code as expected.\n", 3);
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| 250 | } else {
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| 251 | $self->print_msg("*** Command $library_url$command\n");
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| 252 | $self->print_msg("*** Unexpected error type 1. HTTP Response Status: $response_code - Failed.\n");
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| 253 | }
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| 254 | return 0; # return false, since the response_code was an error, expected or not
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| 255 | }
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| 256 | else { # also if response_code is still undefined, as can happen with connection timing out
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| 257 | $self->print_msg("*** Command $library_url$command\n");
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| 258 | if(defined $response_code) {
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| 259 | $self->print_msg("*** Unexpected error type 2. HTTP Response Status: $response_code - Failed.\n");
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| 260 | } else {
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| 261 | $self->print_msg("*** Unexpected error type 3. Failed:\n\n$response_content\n\n");
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| 262 | }
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| 263 | return 0;
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| 264 | }
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| 265 | #print STDERR "********** WgetCommand: $wgetCommand\n\n";
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| 266 | #print STDERR "********** Response_content:\n$response_content\n\n";
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| 267 | #print STDERR "********** Response_CODE: $response_code\n";
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| 268 |
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| 269 | }
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| 270 | }
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| 271 |
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| 272 | sub deactivate_collection {
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| 273 | my $self = shift(@_);
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| 274 |
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| 275 | my $gs_mode = $self->{'gs_mode'};
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| 276 | my $qualified_collection = $self->{'qualified_collection'};
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| 277 |
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| 278 | if($gs_mode eq "gs2") {
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| 279 | my $DEACTIVATE_COMMAND = "?a=config&cmd=release-collection&c=";
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| 280 | my $check_message_against_regex = q/configured release-collection/;
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| 281 | $self->config($DEACTIVATE_COMMAND.$qualified_collection, $check_message_against_regex);
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| 282 | }
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| 283 | elsif ($gs_mode eq "gs3") {
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| 284 | $self->print_msg("\t- Main library servlet\n");
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| 285 | my $DEACTIVATE_COMMAND = "?a=s&sa=d&st=collection&sn=";
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| 286 | my $check_message_against_regex = "collection: $qualified_collection deactivated";
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| 287 | $self->config($DEACTIVATE_COMMAND.$qualified_collection, $check_message_against_regex);
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| 288 |
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| 289 | # and deactivate the collection on OAIserver url too.
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| 290 | # NOTE: if it's not an OAI collection, then the message that the collection is "not enabled for OAI" is EXPECTED. Another possible valid outcome.
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| 291 | $self->print_msg("\t- OAI servlet\n");
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| 292 | $DEACTIVATE_COMMAND = "?deactivate=";
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| 293 | $check_message_against_regex = "(collection\: $qualified_collection deactivated|collection\: $qualified_collection is not enabled for OAI.)";
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| 294 | $self->config($DEACTIVATE_COMMAND.$qualified_collection, $check_message_against_regex, undef, undef, "oaiserver");
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| 295 | }
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| 296 | }
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| 297 |
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| 298 | sub activate_collection {
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| 299 | my $self = shift(@_);
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| 300 |
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| 301 | my $gs_mode = $self->{'gs_mode'};
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| 302 | my $qualified_collection = $self->{'qualified_collection'};
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| 303 |
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| 304 | if($gs_mode eq "gs2") {
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| 305 | my $ACTIVATE_COMMAND = "?a=config&cmd=add-collection&c=";
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| 306 | my $check_message_against_regex = q/configured add-collection/;
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| 307 | $self->config($ACTIVATE_COMMAND.$qualified_collection, $check_message_against_regex);
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| 308 | }
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| 309 | elsif ($gs_mode eq "gs3") {
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| 310 | $self->print_msg("\t- Main library servlet\n");
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| 311 | my $ACTIVATE_COMMAND = "?a=s&sa=a&st=collection&sn=";
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| 312 | my $check_message_against_regex = "collection: $qualified_collection activated";
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| 313 | $self->config($ACTIVATE_COMMAND.$qualified_collection, $check_message_against_regex);
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| 314 |
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| 315 | # and activate the collection on OAIserver url too.
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| 316 | # NOTE: if it's not an OAI collection, then the message that the collection is "not enabled for OAI" is EXPECTED. Another possible valid outcome.
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| 317 | $self->print_msg("\t- OAI servlet\n");
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| 318 | $ACTIVATE_COMMAND = "?activate=";
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| 319 | $check_message_against_regex = "(collection\: $qualified_collection activated|collection\: $qualified_collection is not enabled for OAI.)";
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| 320 | $self->config($ACTIVATE_COMMAND.$qualified_collection, $check_message_against_regex, undef, undef, "oaiserver");
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| 321 | }
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| 322 | }
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| 323 |
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| 324 | sub ping {
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| 325 | my $self = shift(@_);
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| 326 | my $command = shift(@_);
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| 327 | my $silent = shift(@_);
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| 328 |
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| 329 | # If the GS server is not running, we *expect* to see a "500" status code.
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| 330 | # If the GS server is running, then "Ping" ... "succeeded" is expected on success.
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| 331 | # When pinging an inactive collection, it will say it did "not succeed". This is
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| 332 | # a message of interest to return.
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| 333 | my $check_responsemsg_against_regex = q/(succeeded)/;
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| 334 | my $expected_error_code = 500;
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| 335 |
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| 336 | $self->print_msg("*** COMMAND WAS: |$command| ***\n", 4);
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| 337 |
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| 338 | return $self->config($command, $check_responsemsg_against_regex, $expected_error_code, $silent);
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| 339 | }
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| 340 |
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| 341 | # send a pingaction to the GS library. General server-level ping.
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| 342 | sub ping_library {
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|---|
| 343 | my $self = shift(@_);
|
|---|
| 344 |
|
|---|
| 345 | my $gs_mode = $self->{'gs_mode'};
|
|---|
| 346 |
|
|---|
| 347 | my $command = "";
|
|---|
| 348 | if($gs_mode eq "gs2") {
|
|---|
| 349 | $command = "?a=ping";
|
|---|
| 350 | }
|
|---|
| 351 | elsif ($gs_mode eq "gs3") {
|
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| 352 | $command = "?a=s&sa=ping";
|
|---|
| 353 | }
|
|---|
| 354 | return $self->ping($command);
|
|---|
| 355 | }
|
|---|
| 356 |
|
|---|
| 357 |
|
|---|
| 358 | # send a pingaction to a collection in GS library to check if it's active
|
|---|
| 359 | sub ping_library_collection {
|
|---|
| 360 | my $self = shift(@_);
|
|---|
| 361 | my $silent = shift(@_);
|
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| 362 |
|
|---|
| 363 | my $gs_mode = $self->{'gs_mode'};
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|---|
| 364 | my $qualified_collection = $self->{'qualified_collection'};
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| 365 |
|
|---|
| 366 | my $command = "";
|
|---|
| 367 | if($gs_mode eq "gs2") {
|
|---|
| 368 | $command = "?a=ping&c=$qualified_collection";
|
|---|
| 369 | }
|
|---|
| 370 | elsif ($gs_mode eq "gs3") {
|
|---|
| 371 | $command = "?a=s&sa=ping&st=collection&sn=$qualified_collection";
|
|---|
| 372 | }
|
|---|
| 373 | return $self->ping($command, $silent);
|
|---|
| 374 | }
|
|---|
| 375 |
|
|---|
| 376 | # return true if server is persistent, by calling is-persistent on library_url
|
|---|
| 377 | # this is only for GS2, since the GS3 server is always persistent
|
|---|
| 378 | sub is_persistent {
|
|---|
| 379 | my $self = shift(@_);
|
|---|
| 380 |
|
|---|
| 381 | if($self->{'gs_mode'} eq "gs3") { # GS3 server is always persistent
|
|---|
| 382 | return 1;
|
|---|
| 383 | }
|
|---|
| 384 |
|
|---|
| 385 | my $command = "?a=is-persistent";
|
|---|
| 386 | my $check_responsemsg_against_regex = q/true/; # isPersistent: true versus isPersistent: false
|
|---|
| 387 | return $self->config($command, $check_responsemsg_against_regex);
|
|---|
| 388 | }
|
|---|
| 389 |
|
|---|
| 390 | sub set_library_URL {
|
|---|
| 391 | my $self = shift(@_);
|
|---|
| 392 | my $library_url = shift(@_);
|
|---|
| 393 | $self->{'library_url'} = $library_url;
|
|---|
| 394 | }
|
|---|
| 395 |
|
|---|
| 396 | sub get_library_URL {
|
|---|
| 397 | my $self = shift(@_);
|
|---|
| 398 |
|
|---|
| 399 | # For web servers that are external to a Greenstone installation,
|
|---|
| 400 | # the user can pass in their web server's library URL.
|
|---|
| 401 | if($self->{'library_url'}) {
|
|---|
| 402 | return $self->{'library_url'};
|
|---|
| 403 | }
|
|---|
| 404 |
|
|---|
| 405 | # For web servers included with GS (like tomcat for GS3 and server.exe
|
|---|
| 406 | # and apache for GS2), we work out the library URL:
|
|---|
| 407 | my ($gs_mode, $lib_name); # gs_mode can be gs3 or gs2, lib_name is the custom servlet name
|
|---|
| 408 | $gs_mode = $self->{'gs_mode'};
|
|---|
| 409 | $lib_name = $self->{'library_name'};
|
|---|
| 410 |
|
|---|
| 411 | # If we get here, we are dealing with a server included with GS.
|
|---|
| 412 | # For GS3, we ask ant for the library URL.
|
|---|
| 413 | # For GS2, we derive the URL from the llssite.cfg file.
|
|---|
| 414 |
|
|---|
| 415 | # note that unless we pass in $get_public_url=1, we now get the local http URL
|
|---|
| 416 | # by default (e.g. http://127.0.0.1:httpPort/greenstone/library)
|
|---|
| 417 | my $url = &util::get_full_greenstone_url_prefix($gs_mode, $lib_name); # found largely identical method copied
|
|---|
| 418 | # into util.pm. Don't want duplicates, so calling that from here.
|
|---|
| 419 |
|
|---|
| 420 | # either the url is still undef or it is now set
|
|---|
| 421 | #print STDERR "\n@@@@@ final URL:|$url|\n" if $url;
|
|---|
| 422 | #print STDERR "\n@@@@@ URL still undef\n" if !$url;
|
|---|
| 423 |
|
|---|
| 424 | if (defined $url) {
|
|---|
| 425 | $self->{'library_url'} = $url;
|
|---|
| 426 | }
|
|---|
| 427 |
|
|---|
| 428 | return $url;
|
|---|
| 429 | }
|
|---|
| 430 |
|
|---|
| 431 | sub do_deactivate {
|
|---|
| 432 | my $self = shift(@_);
|
|---|
| 433 |
|
|---|
| 434 | # 1. Get library URL
|
|---|
| 435 |
|
|---|
| 436 | # For web servers that are external to a Greenstone installation,
|
|---|
| 437 | # the user can pass in their web server's library URL.
|
|---|
| 438 | # For web servers included with GS (like tomcat for GS3 and server.exe
|
|---|
| 439 | # and apache for GS2), we work out the library URL:
|
|---|
| 440 |
|
|---|
| 441 | # Can't do $self->{'library_url'}, because it may not yet be set
|
|---|
| 442 | my $library_url = $self->get_library_URL(); # returns undef if no valid server URL
|
|---|
| 443 |
|
|---|
| 444 | if(!defined $library_url) { # undef if no valid server URL
|
|---|
| 445 | return; # can't do any deactivation without a valid server URL
|
|---|
| 446 | }
|
|---|
| 447 |
|
|---|
| 448 | my $is_persistent_server = $self->{'is_persistent_server'};
|
|---|
| 449 | my $qualified_collection = $self->{'qualified_collection'};
|
|---|
| 450 |
|
|---|
| 451 | # CollectionManager's installCollection phase in GLI
|
|---|
| 452 | # 2. Ping the library URL, and if it's a persistent server and running, release the collection
|
|---|
| 453 |
|
|---|
| 454 | $self->print_msg("Pinging $library_url\n");
|
|---|
| 455 | if ($self->ping_library()) { # server running
|
|---|
| 456 |
|
|---|
| 457 | # server is running, so release the collection if
|
|---|
| 458 | # the server is persistent and the collection is active
|
|---|
| 459 |
|
|---|
| 460 | # don't need to work out persistency of server more than once, since the libraryURL hasn't changed
|
|---|
| 461 | if (!defined $is_persistent_server) {
|
|---|
| 462 | $self->print_msg("Checking if Greenstone server is persistent\n");
|
|---|
| 463 | $is_persistent_server = $self->is_persistent();
|
|---|
| 464 | $self->{'is_persistent_server'} = $is_persistent_server;
|
|---|
| 465 | }
|
|---|
| 466 |
|
|---|
| 467 | if ($is_persistent_server) { # only makes sense to issue activate and deactivate cmds to a persistent server
|
|---|
| 468 |
|
|---|
| 469 | $self->print_msg("Checking if the collection $qualified_collection is already active\n");
|
|---|
| 470 | my $collection_active = $self->ping_library_collection();
|
|---|
| 471 |
|
|---|
| 472 | if ($collection_active) {
|
|---|
| 473 | $self->print_msg("De-activating collection $qualified_collection\n");
|
|---|
| 474 | $self->deactivate_collection();
|
|---|
| 475 | }
|
|---|
| 476 | else {
|
|---|
| 477 | $self->print_msg("Collection is not active => No need to deactivate\n");
|
|---|
| 478 | }
|
|---|
| 479 | }
|
|---|
| 480 | else {
|
|---|
| 481 | $self->print_msg("Server is not persistent => No need to deactivate collection\n");
|
|---|
| 482 | }
|
|---|
| 483 | }
|
|---|
| 484 | else {
|
|---|
| 485 | $self->print_msg("No response to Ping => Taken to mean server is not running\n");
|
|---|
| 486 | }
|
|---|
| 487 |
|
|---|
| 488 | return $is_persistent_server;
|
|---|
| 489 | }
|
|---|
| 490 |
|
|---|
| 491 | sub do_activate {
|
|---|
| 492 | my $self = shift @_;
|
|---|
| 493 |
|
|---|
| 494 | my $library_url = $self->get_library_URL(); # Can't do $self->{'library_url'}; as it may not be set yet
|
|---|
| 495 |
|
|---|
| 496 | if(!defined $library_url) { # undef if no valid server URL
|
|---|
| 497 | return; # nothing to activate if without valid server URL
|
|---|
| 498 | }
|
|---|
| 499 |
|
|---|
| 500 | my $is_persistent_server = $self->{'is_persistent_server'};
|
|---|
| 501 | my $qualified_collection = $self->{'qualified_collection'};
|
|---|
| 502 |
|
|---|
| 503 | $self->print_msg("Pinging $library_url\n");
|
|---|
| 504 | if ($self->ping_library()) { # server running
|
|---|
| 505 |
|
|---|
| 506 | # don't need to work out persistency of server more than once, since the libraryURL hasn't changed
|
|---|
| 507 | if (!defined $is_persistent_server) {
|
|---|
| 508 | $self->print_msg("Checking if Greenstone server is persistent\n");
|
|---|
| 509 | $is_persistent_server = $self->is_persistent();
|
|---|
| 510 | $self->{'is_persistent_server'} = $is_persistent_server;
|
|---|
| 511 | }
|
|---|
| 512 |
|
|---|
| 513 | if ($is_persistent_server) { # persistent server, so can try activating collection
|
|---|
| 514 |
|
|---|
| 515 | $self->print_msg("Checking if the collection $qualified_collection is not already active\n");
|
|---|
| 516 |
|
|---|
| 517 | # Since we could have deactivated the collection at this point,
|
|---|
| 518 | # it is likely that it is not yet active. When pinging the collection
|
|---|
| 519 | # a "ping did not succeed" message is expected, therefore tell the ping
|
|---|
| 520 | # to proceed silently
|
|---|
| 521 | my $silent = 1;
|
|---|
| 522 | my $collection_active = $self->ping_library_collection($silent);
|
|---|
| 523 |
|
|---|
| 524 | if (!$collection_active) {
|
|---|
| 525 | $self->print_msg(" Collection is not active.\n");
|
|---|
| 526 | $self->print_msg("Activating collection $qualified_collection\n");
|
|---|
| 527 | $self->activate_collection();
|
|---|
| 528 |
|
|---|
| 529 | # unless an error occurred, the collection should now be active:
|
|---|
| 530 | $collection_active = $self->ping_library_collection(); # not silent if ping did not succeed
|
|---|
| 531 | if(!$collection_active) {
|
|---|
| 532 | $self->print_msg("ERROR: collection $qualified_collection did not get activated\n");
|
|---|
| 533 | }
|
|---|
| 534 | }
|
|---|
| 535 | else {
|
|---|
| 536 | $self->print_msg("Collection is already active => No need to activate\n");
|
|---|
| 537 | }
|
|---|
| 538 | }
|
|---|
| 539 | else {
|
|---|
| 540 | $self->print_msg("Server is not persistent => No need to activate collection\n");
|
|---|
| 541 | }
|
|---|
| 542 | }
|
|---|
| 543 | else {
|
|---|
| 544 | $self->print_msg("No response to Ping => Taken to mean server is not running\n");
|
|---|
| 545 | }
|
|---|
| 546 |
|
|---|
| 547 | return $is_persistent_server;
|
|---|
| 548 | }
|
|---|
| 549 |
|
|---|
| 550 |
|
|---|
| 551 | #########################################################
|
|---|
| 552 | ### UNUSED METHODS - CAN BE HANDY
|
|---|
| 553 |
|
|---|
| 554 |
|
|---|
| 555 | # This method uses the perl libraries we're advised to use in place of wget for pinging and retrieving web
|
|---|
| 556 | # pages. The problem is that not all perl installations may support these libraries. So we now use the new
|
|---|
| 557 | # config() method further above, which uses the wget included in Greenstone binary installations.
|
|---|
| 558 | # If the library imports at page top conflict, comment out those imports and move the methods config_old(),
|
|---|
| 559 | # is_URL_active() and pingHost() out to a temporary file.
|
|---|
| 560 | #
|
|---|
| 561 | # If for some reason you can't use wget, then rename the config() method to config_old(), and rename the
|
|---|
| 562 | # method below to config() and things should work as before.
|
|---|
| 563 | sub config_old {
|
|---|
| 564 | my $self = shift(@_);
|
|---|
| 565 | my ($command, $check_message_against_regex, $expected_error_code, $silent, $oai_servlet) = @_;
|
|---|
| 566 |
|
|---|
| 567 | my $library_url = $self->get_library_URL(); #$self->{'library_url'};
|
|---|
| 568 | if($oai_servlet) { # if asked to contact the oaiserver servlet, then
|
|---|
| 569 | # replace the library servlet name with oaiserver servlet name
|
|---|
| 570 | $library_url =~ s@([^/]*?)$@$oai_servlet@;
|
|---|
| 571 | }
|
|---|
| 572 |
|
|---|
| 573 | # Gatherer.java's configGS3Server doesn't use the site variable
|
|---|
| 574 | # so we don't have to either
|
|---|
| 575 |
|
|---|
| 576 | # for GS2, getting the HTTP status isn't enough, we need to read the output
|
|---|
| 577 | # since this is what CollectionManager.config() stipulates.
|
|---|
| 578 | # Using LWP::UserAgent::get($url) for this
|
|---|
| 579 |
|
|---|
| 580 | if(!defined $library_url) {
|
|---|
| 581 | return 0;
|
|---|
| 582 | }
|
|---|
| 583 | else {
|
|---|
| 584 | $ua->timeout(5); # set LWP useragent to 5s max timeout for testing the URL
|
|---|
| 585 | # Need to set this, else it takes I don't know how long to timeout
|
|---|
| 586 | # http://www.perlmonks.org/?node_id=618534
|
|---|
| 587 |
|
|---|
| 588 | # http://search.cpan.org/~gaas/libwww-perl-6.04/lib/LWP/UserAgent.pm
|
|---|
| 589 | # use LWP::UserAgent's get($url) since it returns an HTTP::Response code
|
|---|
| 590 |
|
|---|
| 591 | my $response_obj = $ua->get($library_url.$command);
|
|---|
| 592 |
|
|---|
| 593 | # $response_obj->content stores the content and $response_obj->code the HTTP response code
|
|---|
| 594 | my $response_code = $response_obj->code();
|
|---|
| 595 |
|
|---|
| 596 | if(LWP::Simple::is_success($response_code)) {# $response_code eq RC_OK) { # LWP::Simple::is_success($response_code)
|
|---|
| 597 | $self->print_msg("*** Command $library_url$command\n", 3);
|
|---|
| 598 | $self->print_msg("*** HTTP Response Status: $response_code - Complete.", 3);
|
|---|
| 599 |
|
|---|
| 600 | # check the page content is as expected
|
|---|
| 601 | my $response_content = $response_obj->content;
|
|---|
| 602 | my $resultstr = $response_content;
|
|---|
| 603 | $resultstr =~ s@.*gs_content\"\>@@s;
|
|---|
| 604 | $resultstr =~ s@</div>.*@@s;
|
|---|
| 605 |
|
|---|
| 606 | if($resultstr =~ m/$check_message_against_regex/) {#if($response_content =~ m/$check_message_against_regex/) {
|
|---|
| 607 | $self->print_msg(" Response as expected.\n", 3);
|
|---|
| 608 | $self->print_msg("@@@@@@ Got result:\n$resultstr\n", 4);
|
|---|
| 609 | return 1;
|
|---|
| 610 | } else {
|
|---|
| 611 | # if we expect the collection to be inactive, then we'd be in silent mode: if so,
|
|---|
| 612 | # don't print out the "ping did not succeed" response, but print out any other messages
|
|---|
| 613 |
|
|---|
| 614 | # So we only suppress the ping col "did not succeed" response if we're in silent mode
|
|---|
| 615 | # But if any message other than ping "did not succeed" is returned, we always print it
|
|---|
| 616 | if($resultstr !~ m/did not succeed/ || !$silent) {#if($response_content !~ m/did not succeed/ || !$silent) {
|
|---|
| 617 | $self->print_msg("\n\tBUT: command $library_url$command response UNEXPECTED.\n", 3);
|
|---|
| 618 | $self->print_msg("*** Got message:\n$response_content.\n", 4);
|
|---|
| 619 | $self->print_msg("*** Got result:\n$resultstr\n", 3);
|
|---|
| 620 | }
|
|---|
| 621 | return 0; # ping on a collection may "not succeed."
|
|---|
| 622 | }
|
|---|
| 623 | }
|
|---|
| 624 | elsif(LWP::Simple::is_error($response_code)) { # method exported by LWP::Simple, along with HTTP::Status constants
|
|---|
| 625 | # check the page content is as expected
|
|---|
| 626 | if(defined $expected_error_code && $response_code == $expected_error_code) {
|
|---|
| 627 | $self->print_msg(" Response status $response_code as expected.\n", 3);
|
|---|
| 628 | } else {
|
|---|
| 629 | $self->print_msg("*** Command $library_url$command\n");
|
|---|
| 630 | $self->print_msg("*** Unexpected error. HTTP Response Status: $response_code - Failed.\n");
|
|---|
| 631 | }
|
|---|
| 632 | return 0; # return false, since the response_code was an error, expected or not
|
|---|
| 633 | }
|
|---|
| 634 | else {
|
|---|
| 635 | $self->print_msg("*** Command $library_url$command\n");
|
|---|
| 636 | $self->print_msg("*** Unexpected error. HTTP Response Status: $response_code - Failed.\n");
|
|---|
| 637 | return 0;
|
|---|
| 638 | }
|
|---|
| 639 | }
|
|---|
| 640 | }
|
|---|
| 641 |
|
|---|
| 642 | # This method is now unused. Using ping_library instead to send the ping action to a
|
|---|
| 643 | # GS2/GS3 server. This method can be used more generally to test whether a URL is alive.
|
|---|
| 644 | # http://search.cpan.org/dist/libwww-perl/lib/LWP/Simple.pm
|
|---|
| 645 | # and http://www.perlmonks.org/?node_id=618534
|
|---|
| 646 | sub is_URL_active {
|
|---|
| 647 | my $url = shift(@_); # gs3 or gs2 URL
|
|---|
| 648 |
|
|---|
| 649 | my $status = 0;
|
|---|
| 650 | if(defined $url) {
|
|---|
| 651 | $ua->timeout(10); # set LWP useragent to 5s max timeout for testing the URL
|
|---|
| 652 | # Need to set this, else it takes I don't know how long to timeout
|
|---|
| 653 | # http://www.perlmonks.org/?node_id=618534
|
|---|
| 654 |
|
|---|
| 655 | $status = LWP::Simple::head($url); # returns empty list of headers if it fails
|
|---|
| 656 | # LWP::Simple::get($url) is more intensive, so don't need to do that
|
|---|
| 657 | #print STDERR "**** $url is alive.\n" if $status;
|
|---|
| 658 | }
|
|---|
| 659 | return $status;
|
|---|
| 660 | }
|
|---|
| 661 |
|
|---|
| 662 | # Pinging seems to always return true, so this method doesn't work
|
|---|
| 663 | sub pingHost {
|
|---|
| 664 | my $url = shift(@_); # gs3 or gs2 URL
|
|---|
| 665 |
|
|---|
| 666 | my $status = 0;
|
|---|
| 667 | if(defined $url) {
|
|---|
| 668 | # Get just the domain. "http://localhost/gsdl?uq=332033495" becomes "localhost"
|
|---|
| 669 | # "http://localhost/greenstone/cgi-bin/library.cgi" becomes "localhost" too
|
|---|
| 670 |
|
|---|
| 671 | #my $host = $url;
|
|---|
| 672 | #$host =~ s@^https?:\/\/(www.)?@@;
|
|---|
| 673 | #$host =~ s@\/.*@@;
|
|---|
| 674 | #print STDERR "**** HOST: $host\n";
|
|---|
| 675 |
|
|---|
| 676 | # More robust way
|
|---|
| 677 | # http://stackoverflow.com/questions/827024/how-do-i-extract-the-domain-out-of-an-url
|
|---|
| 678 | my $uri = URI->new( $url );
|
|---|
| 679 | my $host = $uri->host;
|
|---|
| 680 |
|
|---|
| 681 | # Ping the host. http://perldoc.perl.org/Net/Ping.html
|
|---|
| 682 | my $p = Net::Ping->new();
|
|---|
| 683 | $status = $p->ping($host); # || 0. Appears to set to undef rather than 0
|
|---|
| 684 | print STDERR "**** $host is alive.\n" if $status; #print "$host is alive.\n" if $p->ping($host);
|
|---|
| 685 | $p->close();
|
|---|
| 686 | }
|
|---|
| 687 | # return whether pinging was a success or failure
|
|---|
| 688 | return $status;
|
|---|
| 689 | }
|
|---|
| 690 |
|
|---|
| 691 | 1;
|
|---|
