start_form 的默认操作变量

发布于 2024-12-10 15:28:08 字数 530 浏览 0 评论 0原文

我目前正在编写自己的网络服务器来处理 cgi 脚本。在我当前的测试 perl 脚本中，我有一小段代码，

print start_html("CGI Test Page"),
   h1("CGI Test Page"),
   h2("Post Test:"),
   start_form(-method=>"POST",),
   "Post Value: ",textfield('postKey'),
   submit("Submit Post"),
   end_form;

如您所见，start_html 没有在表单定义中分配任何操作参数。但通过这段代码，我得到了该表单定义的以下 html 输出：

<form method="post" action="/cgitest.cgi%" enctype="multipart/form-data">

我将这个奇怪的字符附加到操作变量的末尾。所以我的问题是：由于我没有在 perl 脚本中定义操作值，它使用哪个环境变量来定义其操作？

原文

I'm currently in the process of writing my own web server to handle cgi scripts. In my current test perl script, I have this little bit of code

print start_html("CGI Test Page"),
   h1("CGI Test Page"),
   h2("Post Test:"),
   start_form(-method=>"POST",),
   "Post Value: ",textfield('postKey'),
   submit("Submit Post"),
   end_form;

which as you can see, start_html has no action parameter assigned in the form definition. But with this code, I get the following html output for that form definition:

<form method="post" action="/cgitest.cgi%" enctype="multipart/form-data">

I'm getting that odd character appended to the end of the action variable. So my question is this: Since I don't define the action value in the perl script, which environment variable is it using to define its action?

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油饼 2024-12-17 15:28:08

以下是 CGI.pm 源：

if (defined $action) {
   $action = $self->_maybe_escapeHTML($action);
}
else {
   $action = $self->_maybe_escapeHTML($self->request_uri || $self->self_url);
}

正如您所猜测的，如果您没有定义操作，它会尝试使用 $ENV{'REQUEST_URI'}，但如果它为空，它会使用脚本。定义该 URL 的子例程为 self_url和 url，因此希望那里的源代码将帮助您确定配置中额外的百分号来自何处。

Here is the relevant part from the CGI.pm source:

if (defined $action) {
   $action = $self->_maybe_escapeHTML($action);
}
else {
   $action = $self->_maybe_escapeHTML($self->request_uri || $self->self_url);
}

As you had guessed, if you don't define the action, it attempts to use $ENV{'REQUEST_URI'}, but if that's empty, it uses the URL of the script. The subroutines that define that URL are self_url and url, so hopefully the source code there will help you determine where in your configuration that extra percent sign is coming from.

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