From: Atoli Atoli <grayphoque@...>
Date: 2010-10-23T23:51:42+09:00
Subject: open-uri + Zlib: not in gzip format

Hello,

I have a script that fetches a gzip compressed web page using open-uri
and Zlib.
It works well most of the time, but sometimes Zlib raises a
Zlib::GzipFile::Error exception saying that the data was not in gzip
format (even though the content-encoding was gzip).

The code basically looks like this:

begin
  resp = open(uri, @headers)
  data = Zlib::GzipReader.new(StringIO.new(resp.read)).read
rescue StandardError => e
  puts "#{e.message} / #{resp.meta['content-encoding']}"
end

I tried to dump the data to a file to see if I can inflate it with
gunzip. It worked. I then tried to reopen the file in ruby using Zlib
module, and it also worked.
If the server response was somehow corrupted I wouldn't be able to
gunzip the dumped file, right? Or did I miss something?

Thanks in advance.

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