From: Thomas Hochstein <thh@inter.net>
Date: Mon, 2 Sep 2013 06:51:45 +0000 (+0200)
Subject: Check for invalid newsgroup names.
X-Git-Tag: 0.01~1^2~4^2
X-Git-Url: https://code.th-h.de/?p=usenet%2Fnewsstats.git;a=commitdiff_plain;h=c30822b48b896836735cee5144cbfa3c3703001d;hp=-c

Check for invalid newsgroup names.

Add check to SQLGroupList() and act on it
in groupstats.pl.

Issue #12.

Signed-off-by: Thomas Hochstein <thh@inter.net>
---

c30822b48b896836735cee5144cbfa3c3703001d
diff --git a/NewsStats.pm b/NewsStats.pm
index bfcb37b..fd4843b 100644
--- a/NewsStats.pm
+++ b/NewsStats.pm
@@ -574,6 +574,7 @@ sub SQLGroupList {
   my ($Newsgroups) = @_;
   # substitute '*' wildcard with SQL wildcard character '%'
   $Newsgroups =~ s/\*/%/g;
+  return (undef,undef) if !CheckValidNewsgroups($Newsgroups);
   # just one newsgroup?
   return (SQLGroupWildcard($Newsgroups),$Newsgroups) if $Newsgroups !~ /:/;
   # list of newsgroups separated by ':'
@@ -595,7 +596,6 @@ sub SQLGroupWildcard {
 ###                  (group.name or group.name.%)
 ### OUT: SQL code to become part of a 'WHERE' clause
   my ($Newsgroup) = @_;
-  # FIXME: check for validity
   if ($Newsgroup !~ /%/) {
     return 'newsgroup = ?';
   } else {
@@ -698,6 +698,19 @@ sub SQLBuildClause {
   return $SQLClause;
 };
 
+#####--------------------------- Verifications ----------------------------#####
+
+################################################################################
+sub CheckValidNewsgroups {
+################################################################################
+### syntax check of newgroup list
+### IN : $Newsgroups: list of newsgroups (group.one.*:group.two:group.three.*)
+### OUT: boolean
+  my ($Newsgroups) = @_;
+  my $InvalidCharRegExp = ',; ';
+  return ($Newsgroups =~ /[$InvalidCharRegExp]/) ? 0 : 1;
+};
+
 
 #####------------------------------- done ---------------------------------#####
 1;
diff --git a/groupstats.pl b/groupstats.pl
index 14d19c6..8b93559 100755
--- a/groupstats.pl
+++ b/groupstats.pl
@@ -99,8 +99,13 @@ my ($CaptionPeriod,$SQLWherePeriod) = &GetTimePeriod($OptMonth);
          "please use 'YYYY-MM', 'YYYY-MM:YYYY-MM' or 'ALL'!") if !$CaptionPeriod;
 # get list of newsgroups and set expression for SQL 'WHERE' clause
 # with placeholders as well as a list of newsgroup to bind to them
-my ($SQLWhereNewsgroups,@SQLBindNewsgroups) = &SQLGroupList($OptNewsgroups)
-  if $OptNewsgroups;;
+my ($SQLWhereNewsgroups,@SQLBindNewsgroups);
+if ($OptNewsgroups) {
+  ($SQLWhereNewsgroups,@SQLBindNewsgroups) = &SQLGroupList($OptNewsgroups);
+  # bail out if --newsgroups is invalid
+  &Bleat(2,"--newsgroups option has an invalid format!")
+    if !$SQLWhereNewsgroups;
+}
 
 ### build SQL WHERE clause (and HAVING clause, if needed)
 my ($SQLWhereClause,$SQLHavingClause);
@@ -193,8 +198,8 @@ if ($OptBoundType and $OptBoundType ne 'default') {
 $DBQuery = $DBHandle->prepare(sprintf('SELECT %s FROM %s.%s %s %s %s',
                                       $SQLSelect,
                                       $Conf{'DBDatabase'},$Conf{'DBTableGrps'},
-                                      $SQLWhereClause,$SQLGroupClause,$
-                                      SQLOrderClause));
+                                      $SQLWhereClause,$SQLGroupClause,
+                                      $SQLOrderClause));
 
 # execute query
 $DBQuery->execute(@SQLBindNewsgroups)