Uploading multiple files using LWP

Simon Wistow simon at thegestalt.org
Tue Aug 10 07:38:33 BST 2010

I want to POST multiple files to an API endpoint. 

HTTP::Request::Common says 

  POST 'http://www.perl.org/survey.cgi',
       [ name   => 'Gisle Aas',
         email  => 'gisle at aas.no',
         gender => 'M',
         born   => '1964',
         perc   => '3%',

  Multivalued form fields can be specified by either repeating the field 
  name or by passing the value as an array reference.

then later

  The POST method also supports the multipart/form-data content used for 
  Form-based File Upload as specified in RFC 1867. You trigger this 
  content format by specifying a content type of 'form-data' as one of 
  the request headers. If one of the values in the $form_ref is an array 
  reference, then it is treated as a file part specification with the 
  following interpretation:

  [ $file, $filename, Header => Value... ]
  [ undef, $filename, Header => Value,..., Content => $content ]

Which means, as I understand it (and experimental evidence backs me 
up), that I can't post multiple files because an array ref is used for 
file attributes not multiple instances of files and an array ref of 
array refs just doesn't work.

Is there some easy way of doing this or am I going to have to do 
something mildly convoluted, possibly involving HTML::Form?


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