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class String
def underscore
self.gsub(/::/, '/').
gsub(/([A-Z]+)([A-Z][a-z])/,'\1_\2').
gsub(/([a-z\d])([A-Z])/,'\1_\2').
tr("-", "_").
downcase
end
end
module URI
def self.compound? uri
uri =~ /compound/ and URI.valid? uri
end
def self.task? uri
uri =~ /task/ and URI.valid? uri
end
def self.dataset? uri, subjectid=nil
uri =~ /dataset/ and URI.accessible? uri, subjectid=nil
end
def self.model? uri, subjectid=nil
uri =~ /model/ and URI.accessible? uri, subjectid=nil
end
def self.ssl? uri, subjectid=nil
URI.parse(uri).instance_of? URI::HTTPS
end
def self.accessible?(uri, subjectid=nil)
if URI.task? uri or URI.compound? uri
# just try to get a response, valid tasks may return codes > 400
Net::HTTP.get_response(URI.parse(uri))
true
else
Net::HTTP.get_response(URI.parse(uri + (subjectid ? "?subjectid=#{CGI.escape subjectid}" : ""))).code.to_i < 400
end
rescue
false
end
def self.valid? uri
u = URI::parse(uri)
u.scheme!=nil and u.host!=nil
rescue URI::InvalidURIError
false
end
end
class File
def mime_type
`file -ib #{self.path}`.chomp
end
end
# overwrite backtick operator to catch system errors
module Kernel
# Override raises an error if _cmd_ returns a non-zero exit status.
# Returns stdout if _cmd_ succeeds. Note that these are simply concatenated; STDERR is not inline.
def ` cmd
stdout, stderr = ''
status = Open4::popen4(cmd) do |pid, stdin_stream, stdout_stream, stderr_stream|
stdout = stdout_stream.read
stderr = stderr_stream.read
end
internal_server_error "`" + cmd + "` failed.\n" + stdout + stderr if !status.success?
return stdout
rescue
internal_server_error $!.message
end
end
|
