我如何处理HTTP文件上传？ [英] How can I handle HTTP file uploads?
问题描述
如何编写一个Perl CGI脚本，通过HTTP POST接收文件并将其保存到文件系统中？
<请注意：不管怎么说，不要将它保存在你的网络服务器上。
现在到了这一点：下面是一段时间，我正在使用的照片上传的脚本。它可能需要一些调整，但应该告诉你的方式。
由于图像没有上传到web-accesible目录，我们然后有单独的进程检查它，调整大小，把一个水印，并把它放在它可以访问的地方。
＃！/ usr / bin / perl -wT< head>
使用严格;
使用CGI;
使用CGI ::鲤鱼qw（fatalsToBrowser）;
使用File :: Basename;
$ CGI :: POST_MAX = 1024 * 5000;
my $ safe_filename_characters =a-zA-Z0-9 _.-;
my $ upload_dir =/ home / www / upload;
my $ query = new CGI;
my $ filename = $ query-> param（photo）;
my $ email_address = $ query-> param（email_address）;
$ b $ if（！$ filename）
{
print $ query-> header（）;
打印上传照片时出现问题（尝试更小的文件）。;
出口;
$ b $ my（$ name，$ path，$ extension）= fileparse（$ filename，'\ .. *'）;
$ filename = $ name。 $扩展;
$ filename =〜tr / / _ /;
$ filename =〜s / [^ $ safe_filename_characters] // g;
$ b $ if（$ filename =〜/ ^（[$ safe_filename_characters] +）$ /）
{
$ filename = $ 1;
}
else
{
die文件名包含无效字符;
my $ upload_filehandle = $ query-> upload（photo）;
打开（UPLOADFILE，> $ upload_dir / $ filename）或死掉$！;
binmode UPLOADFILE; （< $ upload_filehandle>）
{
print UPLOADFILE;
}
关闭UPLOADFILE;
print $ query-> header（）;
打印<< END_HTML;
<！DOCTYPE html PUBLIC - // W3C // DTD XHTML 1.0 Strict // ENDTD / xhtml1-strict.dtd>
< meta http-equiv =Content-Typecontent =text / html; charset = utf-8/>
< title>谢谢！< / title>
< / head>
< body>
< p>感谢您上传您的照片！< / p>
< / body>
< / html>
END_HTML
How would I write a Perl CGI script that receives a file via a HTTP post and saves that to the file system?
Just a note: however you will write it, don't save it in a place accessible from your web-server.
And now to the point: below is a script which I was using for some time for photo-uploading. It might need some tweaking, but should show you the way.
As the image isnt uploaded to web-accesible directory, we then have separate process checking it, resizing, putting a watermark and placing it where it can be accessed.
#!/usr/bin/perl -wT
use strict;
use CGI;
use CGI::Carp qw ( fatalsToBrowser );
use File::Basename;
$CGI::POST_MAX = 1024 * 5000;
my $safe_filename_characters = "a-zA-Z0-9_.-";
my $upload_dir = "/home/www/upload";
my $query = new CGI;
my $filename = $query->param("photo");
my $email_address = $query->param("email_address");
if ( !$filename )
{
print $query->header ( );
print "There was a problem uploading your photo (try a smaller file).";
exit;
}
my ( $name, $path, $extension ) = fileparse ( $filename, '\..*' );
$filename = $name . $extension;
$filename =~ tr/ /_/;
$filename =~ s/[^$safe_filename_characters]//g;
if ( $filename =~ /^([$safe_filename_characters]+)$/ )
{
$filename = $1;
}
else
{
die "Filename contains invalid characters";
}
my $upload_filehandle = $query->upload("photo");
open ( UPLOADFILE, ">$upload_dir/$filename" ) or die "$!";
binmode UPLOADFILE;
while ( <$upload_filehandle> )
{
print UPLOADFILE;
}
close UPLOADFILE;
print $query->header ( );
print <<END_HTML;
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Thanks!</title>
</head>
<body>
<p>Thanks for uploading your photo!</p>
</body>
</html>
END_HTML
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