使用 Plack 处理多个文件上传 [英] Handling multiple file uploads with Plack

问题描述

尝试使用 Plack 处理多个文件上传.

Trying handling multiple file uploads with Plack.

我的表格:

<form id="file_upload" action="savefile" method="POST" enctype="multipart/form-data">
<input type="file" name="file[]" multiple>
<button>upload</button>
</form>

选择了两个文件，名为:x1 和 x2.Data::Dumper 的结果:

Selected two files, called: x1 and x2. The Data::Dumper result of the:

my $u = $req->uploads;

是

$VAR1 = bless( {
    'file[]' => bless( {
         'headers' => bless( {
              'content-disposition' => 'form-data; name="file[]"; filename="x2"',
              'content-type' => 'application/octet-stream',
              '::std_case' => {
                   'content-disposition' => 'Content-Disposition'
              }
         }, 'HTTP::Headers' ),
         'filename' => 'x2',
         'tempname' => '/var/folders/7l/nhyscwy14bjb_sxr_t2gynpm0000gn/T/7vt04wIrne',
         'size' => 146
    }, 'Plack::Request::Upload' )
}, 'Hash::MultiValue' );

所以，它只包含第二个文件 x2，但是当检查文件夹 /var/folders/7l/nhyscwy14bjb_sxr_t2gynpm0000gn/T/ 时，它包含两个文件 已上传.

So, it contains only the second file x2, but when checked the folder /var/folders/7l/nhyscwy14bjb_sxr_t2gynpm0000gn/T/ it contains both files uploaded.

问题是我如何才能将两个文件添加到脚本中，而不是最后一个?

The question is how i can get both files to the script, not ony the last one?

推荐答案

for my $upload ($req->upload('file[]')) {
  $upload->filename;
}

您也可以调用 @uploads = $req->uploads->get_all('file[]') 来获取多个值.

You can also call @uploads = $req->uploads->get_all('file[]') to get multiple values.

参见 perldoc Plack::Request(和 Hash::MultiValue) 了解更多详情.

See perldoc Plack::Request (and Hash::MultiValue) for more details.

您在 Data::Dumper 中看不到它们的原因是 Hash::MultiValue 使用一种称为内向外对象的技术，为给定的键保存替代值.

The reason you don't see them in Data::Dumper is that Hash::MultiValue uses a technique called inside-out object, to save alternate values for a given key.

这篇关于使用 Plack 处理多个文件上传的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！