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Re: Re: Re: in memory files in 5.6.1

by hanenkamp (Pilgrim)
on Oct 25, 2003 at 20:33 UTC ( #302104=note: print w/replies, xml ) Need Help??


in reply to Re: Re: in memory files in 5.6.1
in thread in memory files in 5.6.1

Not true, this should work:

use IO::Scalar; my $fh = IO::Scalar->new; print $fh "foo\n"; # Rather than $fh->print ... # or, if you prefer select $fh; print "bar\n";

This works through the magic of a tied file handle. See perltie for details on tying a file handle.

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Re^4: in memory files in 5.6.1
by WolliK (Novice) on Apr 04, 2016 at 14:20 UTC

    Hi hanenkamp,
    please do you have an idea to how handle these kind of "InMemoryfile" to put this on a local drive or to a webserver via HTTP::DAV of (S)FTP ?
    The transfer programs allways want to have a filename instead a filehandle.

    Regards
    WolliK
      how handle these kind of "InMemoryfile" to put this on a local drive

      Well, just use a plain file instead!

      or to a webserver via HTTP::DAV of (S)FTP ? The transfer programs allways want to have a filename instead a filehandle.

      HTTP::DAV implements WebDAV, which is, as the name suggests, an extension to HTTP. HTTP does not know anything about files. So a sane DAV client should be able to upload arbitary data, not just files. And in fact, HTTP::DAV documents for the put method:

      One can upload/put a string by passing a reference to a scalar in the -local parameter.

      Of course, to access the scalar behind IO::Scalar, you need to pass a reference to a scalar to the constructor IO::Scalar->new(), see IO::Scalar. BTW: You would pass the same reference to HTTP::DAV's put() method.

      Net::SFTP implements open, read, write, close. No need to mess with in-memory files, but of course, you could write the scalar used to store the in-memory file using Net::SFTP's write method.

      Net::FTP accepts a file name or a file handle for put(), so you should be able to pass the IO::Scalar instance to put().

      Alexander

      --
      Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)
        Hi affoken,

        I've tried different ways, but none of them works. I've created a InMemoryFile withe two lines;
        foo_line_01\n
        foo_line_02\n

        Here are the output of my tests:

        Try to upload all the *.txt files from this directory:
        
        command: ..put( -local => "*.txt",   -url => "$url/$base_dir/$work_dir" )
        Reply..:   put *.txt succeeded
        
        Try to upload the InMemoryfile accessed via filehandler $fh:
        
        command: ..put( -local => "$fh",    -url => "$url/$base_dir/$work_dir" )
        Reply..:   put foo_Line_01
        foo_Line_02
         failed
        
        command: ..put( -local => \$fh,     -url => "$url/$base_dir/$work_dir" )
        Reply..:   put REF(0x274dc28) failed
        
        command: ..put( -local => $fhref,   -url => "$url/$base_dir/$work_dir" )
        Reply..:   put REF(0x274dc28) failed 
        
        command: ..put( -local => "\$fh",   -url => "$url/$base_dir/$work_dir" )
        Reply..:   put $fh failed
        
        command: ..put( -local => "\$fhref",-url => "$url/$base_dir/$work_dir" )
        Reply..:   put $fhref failed
        

        Any idea how to handle the -local parameter of the HTTP::DAV put request for an InMemoryfile linehandler?

        Regards
        WolliK

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