Faraday: Zlib::DataError on Get request

Looking into the source on net_http.rb and comparing it to HTTParty:

• Faraday uses .get with a comment about using get instead of request because Ruby 1.9 handles gzip.
• HTTParty is using .get and handing compression/deflating on it's own.

It looks like the bug is actually in Ruby. Here is a cleaner sample:

require 'net/https'

url = "http://www.imaginativeuniversal.com/blog/post/2012/02/14/Why-the-Kinect-for-Windows-Sensor-Costs-2424999.aspx"
uri = URI.parse(url)

http = Net::HTTP.new(uri.host, uri.port)
request = Net::HTTP::Get.new(uri.request_uri)

http.request(request).code #ok
http.get(request).code #fails

Net::HTTP#get isn't meant to receive a request object, it expects a path and (optionally) headers. It then builds its own request. See http://rubydoc.info/stdlib/net/1.9.2/Net/HTTP#get-instance_method

The server is sending the response using an unsupported compression method. Seems like it's the server's fault.

You can try working around it by setting a request header:

"accept-encoding" => "none"

Not sure if this will work. You can also use another adapter, such as Typhoeus.

It's a ruby bug.

url = "http://www.imaginativeuniversal.com/blog/post/2012/02/14/Why-the-Kinect-for-Windows-Sensor-Costs-2424999.aspx"
uri = URI.parse(url)

Net::HTTP.start(uri.host, uri.port) do |http|
  response = http.get(uri.request_uri)
  p response.body[0,100]
end

Getting:

net/http.rb:1035:in `inflate': unknown compression method (Zlib::DataError)

@mislav setting "accept-encoding" => "none" fixed the zlib error I was fighting. Thanks.

Sorry if this is obvious but how do I do this exactly?

@roryc89 When you're constructing a connection object:

Faraday.new headers: { accept_encoding: 'none' } do |conn|
  # ...
end

Or per-request:

conn.get '/foo/bar' do |req|
  req.headers[:accept_encoding] = 'none'
end

@mislav setting "accept-encoding" => "none" fixed the zlib error for me too, thanks! 👍

This worked for me too, Thanks guys!!