Ruby zlib on 1.7.3/W2k - uncompressing value from http get

ruby-talk
1

I am using the PragProg 1.7.3 distro of ruby which includes zlib 0.5.1

I am trying to decode the response.body from an HTTP request.

Like this:
headers[“Accept-encoding”] = "gzip"
uri = URI.parse(source)
h = Net::HTTP.new(uri.host)
resp = h.get(uri.path, headers)
puts "Code = #{resp.code}"
puts "Message = #{resp.message}"
resp.each {|key, val| printf “%-14s = %-40.40s\n”, key, val }
data = resp.body
if resp.fetch(‘content-encoding’, ‘None’) == 'gzip’
begin
pp data[0…2]
data = Zlib::Inflate.inflate(data)
rescue StandardError => err
print "Zlib error: #{err}\n"
end
end

This always results in : Zlib error: unknown compression method

Byte 2 of the string is \010 - which is correct.

Anyone seen this?

Thanks in advance.

-Jeff

2

See:

http://www.blue.sky.or.jp/atelier/ruby/zlib.en.html

For gzip you have to use Zlib::Gzip and a GzipReader object.

···

On Saturday, December 14, 2002, at 11:35 PM, Jeff Schilling wrote:

I am using the PragProg 1.7.3 distro of ruby which includes zlib 0.5.1

I am trying to decode the response.body from an HTTP request.

Like this:
headers[“Accept-encoding”] = “gzip”
uri = URI.parse(source)
h = Net::HTTP.new(uri.host)
resp = h.get(uri.path, headers)
puts “Code = #{resp.code}”
puts “Message = #{resp.message}”
resp.each {|key, val| printf “%-14s = %-40.40s\n”, key, val }
data = resp.body
if resp.fetch(‘content-encoding’, ‘None’) == ‘gzip’
begin
pp data[0…2]
data = Zlib::Inflate.inflate(data)
rescue StandardError => err
print “Zlib error: #{err}\n”
end
end

This always results in : Zlib error: unknown compression method

Byte 2 of the string is \010 - which is correct.

Anyone seen this?

Thanks in advance.

-Jeff

3

thanks.

I guess I was under the impression that the inflator would work the same.

In any case, the combo of StringIO and GzipReader did the trick.

-Jeff

Mark Wilson mwilson13@cox.net wrote in message news:89123A4B-0FE9-11D7-8B25-000393876156@cox.net…

···

See:

http://www.blue.sky.or.jp/atelier/ruby/zlib.en.html

For gzip you have to use Zlib::Gzip and a GzipReader object.

On Saturday, December 14, 2002, at 11:35 PM, Jeff Schilling wrote:

I am using the PragProg 1.7.3 distro of ruby which includes zlib 0.5.1

I am trying to decode the response.body from an HTTP request.

Like this:
headers[“Accept-encoding”] = “gzip”
uri = URI.parse(source)
h = Net::HTTP.new(uri.host)
resp = h.get(uri.path, headers)
puts “Code = #{resp.code}”
puts “Message = #{resp.message}”
resp.each {|key, val| printf “%-14s = %-40.40s\n”, key, val }
data = resp.body
if resp.fetch(‘content-encoding’, ‘None’) == ‘gzip’
begin
pp data[0…2]
data = Zlib::Inflate.inflate(data)
rescue StandardError => err
print “Zlib error: #{err}\n”
end
end

This always results in : Zlib error: unknown compression method

Byte 2 of the string is \010 - which is correct.

Anyone seen this?

Thanks in advance.

-Jeff

4

Hi,

http://www.blue.sky.or.jp/atelier/ruby/zlib.en.html

Sorry, this document is too old. I’ll replace it with new one soon.

For gzip you have to use Zlib::Gzip and a GzipReader object.

Use Zlib::GzipReader instead of GzipReader if you use Ruby/zlib-0.5.1.

Regards,

UENO Katsuhiro unnie@blue.sky.or.jp

···

On Sun, 15 Dec 2002 13:56:17 +0900 Mark Wilson mwilson13@cox.net wrote: