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| | # -*- encoding: binary -*-
# here are internal implementation details, do not use them in your code
require 'socket'
require 'uri'
require 'digest/md5'
require 'mogilefs/chunker'
module MogileFS::NewFile::Common
# :stopdoc:
class RetryableError < MogileFS::Error; end
class EmptyResponseError < RetryableError; end
class BadResponseError < RetryableError; end
class UnparseableResponseError < RetryableError; end
class NoStorageNodesError < MogileFS::Error
def message; 'Unable to open socket to storage node'; end
end
class NonRetryableError < MogileFS::Error; end
MD5_TRAILER_NODES = {} # :nodoc: # EXPERIMENTAL
def read_response(sock)
tout = @opts[:new_file_max_time] || 3600.0
start_time = @opts[:start_time] and tout -= Time.now - start_time
case line = sock.timed_read(23, "", tout > 0.0 ? tout : 0)
when %r{^HTTP/\d\.\d\s+(2\d\d)\s} # success!
when nil
raise EmptyResponseError, 'Unable to read response line from server'
when %r{^HTTP/\d\.\d\s+(\d+)}
raise BadResponseError, "HTTP response status from upload: #$1"
else
raise UnparseableResponseError,
"Response line not understood: #{line.inspect}"
end
end
def create_close(devid, uri, bytes_uploaded)
args = {
:fid => @opts[:fid],
:devid => devid,
:key => @opts[:key],
:domain => @opts[:domain],
:size => bytes_uploaded,
:path => uri.to_s,
}
if @md5
args[:checksum] = "MD5:#{@md5.hexdigest}"
elsif String === @opts[:content_md5]
hex = @opts[:content_md5].unpack('m')[0].unpack('H*')[0]
args[:checksum] = "MD5:#{hex}"
end
args[:checksumverify] = 1 if @opts[:checksumverify]
backend = @opts[:backend]
# upload could've taken a long time, ping and try to ensure socket
# is valid to minimize (but not completely eliminate) the chance
# create_close hits a stale socket (while reading the response after
# writing to it) and becomes non-retryable. We treat create_close
# specially as its less idempotent than any other command
# (even other non-idempotent ones). There may be no hope of retrying
# the upload at all if data was streamed and calling create_close
# twice will hurt us...
backend.noop
backend.create_close(args)
bytes_uploaded
end
# aggressive keepalive settings on Linux + Ruby 1.9.2+
TCP_KEEPALIVE = {
:TCP_KEEPIDLE => 60, # seconds time before keepalive packet is sent
:TCP_KEEPINTVL => 5,
:TCP_KEEPCNT => 2, # number of retries
}
req_consts = TCP_KEEPALIVE.keys
if (Socket.constants & req_consts).size == req_consts.size
def set_socket_options(sock)
sock.setsockopt(:SOL_SOCKET, :SO_KEEPALIVE, 1)
TCP_KEEPALIVE.each do |k,v|
sock.setsockopt(:IPPROTO_TCP, k, v)
end
end
else
def set_socket_options(sock)
sock.setsockopt(Socket::SOL_SOCKET, Socket::SO_KEEPALIVE, 1)
end
end
# :startdoc:
end
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