Linux环境下Perl语言对数据库的操纵
发表于:2007-06-11来源:作者:点击数:
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实例:同一主机下的运行 主机配置:PIII450 128M 15GB 操作系统:Red Hat Linux 6.1 数据库:MySQL-3.22.29 建议使用RPM方式安装,至少要安装下面三个包: MySQL-3.22.29-1.i386.rpm MySQL-client-3.22.29-1.i386.rpm MySQL-devel-3.22.29-1.i386.rpm WWW 服
实例:同一主机下的运行
主机配置:PIII450 128M 15GB
操作系统:Red Hat Linux 6.1
数据库:MySQL-3.22.29
建议使用RPM方式安装,至少要安装下面三个包:
MySQL-3.22.29-1.i386.rpm
MySQL-client-3.22.29-1.i386.rpm
MySQL-devel-3.22.29-1.i386.rpm
WWW
服务器:Apache 1.3.6 for Linux
Perl 解释器:version 5.005_03 built for i386-linux
DBI: 版本为:1.13
Data-ShowTable: 版本为:3.3
DBD: M
sql-Mysql-modules-1.2018
本人成功地在上述环境下实现了对MySQL数据库的访问。与
Windows环境下的数据库不同,它不需要建立外部数据源.
下面是一个应用的简单例子:
为了统计用户访问我们的网站的次数,我们建立了一个数据库, 在其中建一个表,表名为:usedata, 共有三列:userno,userpass,lognum,分别代表用户名,密码,登录次数.
假定我们使用test数据库,在该库中创建表usedata, 我们既可以编一个PERL程序实现,也可以在命令行方式下实现:
<br>
#mysql test<br>
>CREATE TABLE usedata(userno CHAR(8) NOT NULL, usepass CHAR(8) NOT NULL, lognum INT);<br>
>exit<br>
共有两个htm文件,两个pl文件. <br>
regist.htm <html><br>
<head><br>
<meta http-equiv=\"Content-Type\"<br>
content=\"text/html; charset=gb_2312-80\"><br>
<meta name=\"GENERATOR\" content=\"Microsoft FrontPage Express 2.0\"><br>
<title>注册</title><br>
</head><br>
<body><br>
<p><center><font color=ff3380>用户在线注册</font></center><br>
</p><br>
<form action=\"/cgi-bin/database/regist.pl\" method=\"POST\"><br>
<table border=\"0\"> <br>
<
td valign=\"top\"><font color=\"#400080\">用户名<input type=text name=\IDNO\ size=4 maxlength=8></font><br>
<td valign=\"top\"><font color=\"#400080\">密码<input type=password name=\PASS\ size=6 maxlength=8></font><br>
</table><br>
<font color=\"#0080C0\"><input type=\"submit\"<br>
value=\"注册\"> <input type=\"reset\" value=\"清除\"> </font><br>
</form><br>
</body><br>
</html> <br>
login.htm <html><br>
<head><br>
<meta http-equiv=\"Content-Type\"<br>
content=\"text/html; charset=gb_2312-80\"><br>
<meta name=\"GENERATOR\" content=\"Microsoft FrontPage Express 2.0\"><br>
<title>登录</title><br>
</head><br>
<body><br>
<p><center><font color=ff3380>用户在线登录</font></center><br>
</p><br>
<form action=\"/cgi-bin/database/login.pl\" method=\"POST\"><br>
<table border=\"0\"> <br>
<td valign=\"top\"><font color=\"#400080\">用户名<input type=text name=\IDNO\ size=4 maxlength=8></font><br>
<td valign=\"top\"><font color=\"#400080\">密码<input type=password name=\PASS\ size=6 maxlength=8></font><br>
</table><br>
<font color=\"#0080C0\"><input type=\"submit\"<br>
value=\"登录\"> <input type=\"reset\" value=\"清除\"> </font><br>
</form><br>
</body><br>
</html> <br>
regist.pl #!/usr/bin/perl<br>
# regist.pl
<p>read(S
TDIN, $buffer, $ENV{\CONTENT_LENGTH\});<br>
@pairs = split(/&/, $buffer);<br>
foreach $pair (@pairs) {<br>
($name, $value) = split(/=/, $pair);<br>
$value =~ tr/+/ /;<br>
$value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack(\"C\", hex($1))/eg;<br>
$value =~ s/<!--(.|\\n)*-->//g;<br>
$value=~ s/<([^>]|\\n)*>//g;<br>
$value=~ s/>/>/g;<br>
$value=~ s/</</g; <br>
$FORM{$name} = $value;<br>
}
<p>print \"Content-type: text/html\\n\\n\";
<p>print \"<HTML><HEAD><TITLE>注册</TITLE></HEAD>\\n\";
<p>print \"<body bgcolor=#FFFFFF>\\n\";
<p><br>
if ($FORM{\IDNO\} eq \"\")<br>
{<br>
print<<EOF;<br>
<center><font color=red>用户名不能为空!</font><br>
返回<a href=\
javascript:history.go(-1);\>前页</a>修改<br>
</center><br>
EOF<br>
exit(0);<br>
}
<p>if ($FORM{\PASS\} eq \"\")<br>
{<br>
print<<EOF;<br>
<center><font color=red>密码不能为空!</font><br>
返回<a href=\javascript:history.go(-1);\>前页</a>修改<br>
</center><br>
EOF<br>
exit(0);<br>
}
<p>$host= shift || \"\";<br>
$test_db=\"test\";<br>
$opt_user=$opt_password=\"\";
<p>use DBI;
<p>$|= 1; # Autoflush
<p>$table=\"usedata\";
<p>$dbh = DBI->connect(\"DBI:mysql:$test_db:$host\",$opt_user,$opt_password) || die \"Can\t connect: $DBI::errstr\\n\";
<p>$n1 = $FORM{\IDNO\};
<p>$sth=$dbh->prepare(\"select * from usedata where userno=$n1 \") or die $dbh->errstr;
<p>$sth->execute() or die $sth->errstr;
<p>if (($row = $sth->fetchrow_arrayref))<br>
{<br>
$dbh->disconnect();<br>
print<<EOF;<br>
<center><font color=red>用户名已存在!</font><br>
返回<a href=\javascript:history.go(-1);\>前页</a>修改<br>
</center><br>
EOF<br>
exit(0);<br>
}<br>
$n2 = $FORM{\PASS\};<br>
$n3 = 1;<br>
$dbh->do(\"insert into $table values($n1, $n2,$n3)\") or die $DBI::errstr;
<p>$dbh->disconnect();<br>
print<<EOF;<br>
<center>您已注册成功!</center><br>
</BODY></HTML><br>
EOF<br>
exit(0);
<p>login.pl #!/usr/bin/perl<br>
# login.pl
<p>read(STDIN, $buffer, $ENV{\CONTENT_LENGTH\});<br>
@pairs = split(/&/, $buffer);<br>
foreach $pair (@pairs) {<br>
($name, $value) = split(/=/, $pair);<br>
$value =~ tr/+/ /;<br>
$value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack(\"C\", hex($1))/eg;<br>
$value =~ s/<!--(.|\\n)*-->//g;<br>
$value=~ s/<([^>]|\\n)*>//g;<br>
$value=~ s/>/>/g;<br>
$value=~ s/</</g; <br>
$FORM{$name} = $value;<br>
}
<p>print \"Content-type: text/html\\n\\n\";
<p>print \"<HTML><HEAD><TITLE>登录</TITLE></HEAD>\\n\";
<p>print \"<body bgcolor=#FFFFFF>\\n\";
<p><br>
if ($FORM{\IDNO\} eq \"\")<br>
{<br>
print<<EOF;<br>
<center><font color=red>用户名不能为空!</font><br>
返回<a href=\javascript:history.go(-1);\>前页</a>修改<br>
</center><br>
EOF<br>
exit(0);<br>
}
<p>if ($FORM{\PASS\} eq \"\")<br>
{<br>
print<<EOF;<br>
<center><font color=red>密码不能为空!</font><br>
返回<a href=\javascript:history.go(-1);\>前页</a>修改<br>
</center><br>
EOF<br>
exit(0);<br>
}
<p>$host= shift || \"\";<br>
$test_db=\"test\";<br>
$opt_user=$opt_password=\"\";<br>
use DBI;<br>
$|= 1; # Autoflush
<p>$table=\"usedata\";
<p>$dbh = DBI->connect(\"DBI:mysql:$test_db:$host\",$opt_user,$opt_password) || die \"Can\t connect: $DBI::errstr\\n\";
<p>$n1 = $FORM{\IDNO\};<br>
$sth=$dbh->prepare(\"select * from usedata where userno=$n1 \") or die $dbh->errstr;
<p>$sth->execute() or die $sth->errstr;<br>
if (($row = $sth->fetchrow_arrayref))<br>
{<br>
if ($row->[1] eq $FORM{\PASS\})<br>
{<br>
$NUM = $row->[2]+1;<br>
$sth=$dbh->prepare(\"UPDATE usedata SET lognum=$NUM where userno=$n1 \") or die $dbh->errstr;<br>
$sth->execute() or die $sth->errstr; print<<EOF;<br>
<center>您第 $NUM 次登录!</center><br>
EOF<br>
}<br>
else<br>
{<br>
print<<EOF; <br>
<center><font color=red>密码不正确!</font><br>
返回<a href=\javascript:history.go(-1);\>前页</a>修改<br>
</center><br>
EOF<br>
}<br>
}<br>
else<br>
{<br>
print<<EOF; <br>
<center><font color=red>用户名不正确!</font><br>
返回<a href=\javascript:history.go(-1);\>前页</a>修改<br>
</center><br>
EOF<br>
}<br>
$dbh->disconnect();<br>
print <<EOF;<br>
</body></html><br>
EOF<br>
exit(0); <br>