[ruby-core:66125] [ruby-trunk - Bug #10484] [Open] http response throw error with broken gzip compressed block(but can decompress)

Issue #10484 has been reported by DaeMyung Kang.

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Bug #10484: http response throw error with broken gzip compressed block(but can decompress)
https://bugs.ruby-lang.org/issues/10484

* Author: DaeMyung Kang
* Status: Open
* Priority: Low
* Assignee: 
* Category: 
* Target version: 
* ruby -v: 2.1.4
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN
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I meet a exception case for gzip compress, Ruby throws Zlib::BufError

Actually, I think this is not ruby's bug.
because this site make some weird gzip compressed block.

but major browser can handle this site well.

so, I this it is better to handle this case in Ruby also.

http://xe.sketchbooks.co.kr/806541

I found two things but it is because of weird compress block.
first, even though, it meets end of block, it just return Z_OK.
so, ruby zlib binding can't return last data block. 
 so I add code for returning last block in this case.
second. finish causes Zlib::BufError exception in this case.
 so I catch this Exception only when finish causes Zlib::BufError

and I found one more thing.
Ruby 1.8.x run below code well. But ruby 2.x can't
(I just guess, it is unintented side effect to push block code for inflate) 

```ruby
require 'net/https'
require 'open-uri'

url = "http://xe.sketchbooks.co.kr/806541"
uri = URI.parse(url.to_s)
http = Net::HTTP::new(uri.host, uri.port)

http_get = Net::HTTP::Get.new(uri.request_uri)
response = http.request(http_get)
```

---Files--------------------------------
ruby_weird_gzip.patch (1.27 KB)


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