Rails - Jan 2012 - File size of web-based flv. Reading some bytes from a web-based file.

This is such a noobie question.

I have a file, http://www.ultradedup.com/videolib/One-minute-commercial-027.flv

I want to do two simple things:

1) I want to get the file size.

2) I want to read a few hundred bytes from the beginning of the file so as to
pick up te flv''s time duration.

Are there RoR and/or Ruby facilities to do this?

Ralph Shnelvar

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Well the File lass has a size method and you can open files and read
them with sysread which is available in the IO class (which you get
when you open a file)

Also this has nothing to do with RoR

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Peter,

Tuesday, January 3, 2012, 2:37:35 AM, you wrote:

PH> Well the File lass has a size method and you can open files and read
PH> them with sysread which is available in the IO class (which you get
PH> when you open a file)

PH> Also this has nothing to do with RoR

At least on my machine

C:\Users\Ralph>irb
irb(main):001:0>
File.size(''c:/RailsInstaller/Sites/ultradedup002/app/views/usage/VideoTutorials.html.haml'')
=> 32406
irb(main):002:0>
File.size(''http://www.ultradedup.com/videolib/One-minute-commercial-027.flv'')
Errno::EINVAL: Invalid argument -
http://www.ultradedup.com/videolib/One-minute-commercial-027.flv
        from (irb):2:in `size''
        from (irb):2
        from C:/RailsInstaller/Ruby1.9.2/bin/irb:12:in `<main>''
irb(main):003:0>


So File.size() seems to work on local files and not web-based files.

I''ll take this to the ruby chat list.

Ralph Shnelvar

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Hi Ralphs,
just use these
response = http.request_head(RemoteAddress)
file_size = response[''content-length'']






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