From: Robert Klemme <shortcutter@...>
Date: 2007-11-03T00:35:55+09:00
Subject: Re: IOS troubles with binary data on windows

2007/11/2, Brandon Casci <brandon@loudcity.net>:
> The chunk size isn't the problem.
>
> This code streams mp3 data to standard input for a pipe opened up an an
> executable called ezstream. Ezstream is a source for icecast server.
>
>
> here is @ezstream:
>
> @ezstream = IO.popen("C:\\Program
> Files\\ezstream-0.4.3-win32\\ezstream.exe -c \"C:\\Program
> Files\\ezstream-0.4.3-win32\\examples\\stdin.xml\"", "r+b")
>
> This code works on Windows:
>
> url = get_track_url
>
> Net::HTTP.start(url.host, url.port) do |http|
>         http.request_get(url.request_uri, {"User-Agent"=>"Mozilla/5.0
> (Windows; U; Windows NT 5.1; en-US; rv:1.8.1) Gecko/20061010
> Firefox/2.0"}) do |res|
>   raise "Bad response :#{res.code}: #{res.body}" unless res.code ==
> "200"
>       res.read_body do |segment|
>     @ezstream.write segment
>       end
>   end
> end
>
>
> This code does not work on Windows:
>
> f = File.open(get_file_path,'rb')
> count = nil
> until count == 0
>    count = @ezstream.write(f.read(1024))
>    #Invalid argument (Errno::EINVAL)
>    # you get a broken pipe exception with sysread and syswrite too
> end
>
> Any ideas what is so different about chunking a file from disk versus
> chunking the file from an http network stream?

Check the documentation, especially the return value of #write.  Note
also the copying algorithm I suggested.  Hint: your file copying is
flawed.

Cheers

robert

-- 
use.inject do |as, often| as.you_can - without end