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Rescue origin errors #64

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Rescue origin errors #64

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8a50ebb
Rescue from connection refused errors and return the appropriate stat…
andrewhavens Mar 31, 2017
beaecab
log to STDOUT when rescuing error from origin
jjb Feb 7, 2018
a25c50c
expand list of rescued origin request exceptions
jjb Feb 7, 2018
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22 changes: 22 additions & 0 deletions lib/rack_reverse_proxy/roundtrip.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -162,12 +162,34 @@ def build_response_headers
end
end

NET_HTTP_EXCEPTIONS = [
IOError,
Errno::ECONNABORTED,
Errno::ECONNREFUSED,
Errno::ECONNRESET,
Errno::EHOSTUNREACH,
Errno::EINVAL,
Errno::ENETUNREACH,
Errno::EPIPE,
Net::HTTPBadResponse,
Net::HTTPHeaderSyntaxError,
Net::ProtocolError,
SocketError,
Zlib::GzipFile::Error,
]
NET_HTTP_EXCEPTIONS << OpenSSL::SSL::SSLError if defined?(OpenSSL)
NET_HTTP_EXCEPTIONS << Net::OpenTimeout if defined?(Net::OpenTimeout)

def rack_response_headers
Rack::Utils::HeaderHash.new(
Rack::Proxy.normalize_headers(
format_headers(target_response.headers)
)
)
rescue *NET_HTTP_EXCEPTIONS => e
puts "rack-reverse-proxy rescued error from origin: #{e.class.name}: #{e.message}"
@_target_response = Struct.new(:status, :body).new(502, [])
{}
end

def replace_location_header
Expand Down