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Diffstat (limited to 'lib/rest-client-wrapper.rb')
-rw-r--r-- | lib/rest-client-wrapper.rb | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/lib/rest-client-wrapper.rb b/lib/rest-client-wrapper.rb new file mode 100644 index 0000000..de1b74f --- /dev/null +++ b/lib/rest-client-wrapper.rb @@ -0,0 +1,98 @@ +module OpenTox + + class RestClientWrapper + + attr_accessor :request, :response + + @@subjectid = nil + + def self.subjectid=(subjectid) + @@subjectid = subjectid + end + + def self.subjectid + @@subjectid + end + + # REST methods + # Raises OpenTox::Error if call fails (rescued in overwrite.rb -> halt 502) + # Does not wait for task to finish and returns task uri + # @param [String] destination URI + # @param [optional,Hash|String] Payload data posted to the service + # @param [optional,Hash] Headers with params like :accept, :content_type, :subjectid, :verify_ssl + # @return [RestClient::Response] REST call response + [:head,:get,:post,:put,:delete].each do |method| + + define_singleton_method method do |uri,payload={},headers={},waiting_task=nil| + + # check input + bad_request_error "Headers are not a hash: #{headers.inspect}", uri unless headers==nil or headers.is_a?(Hash) + headers[:subjectid] ||= @@subjectid + bad_request_error "Invalid URI: '#{uri}'", uri unless URI.valid? uri + #resource_not_found_error "URI '#{uri}' not found.", uri unless URI.accessible?(uri, @subjectid) unless URI.ssl?(uri) + # make sure that no header parameters are set in the payload + [:accept,:content_type,:subjectid].each do |header| + if defined? $aa || URI(uri).host == URI($aa[:uri]).host + else + bad_request_error "#{header} should be submitted in the headers", uri if payload and payload.is_a?(Hash) and payload[header] + end + end + + # create request + args={} + args[:method] = method + args[:url] = uri + args[:verify_ssl] = 0 if headers[:verify_ssl].nil? || headers[:verify_ssl].empty? + args[:timeout] = 1800 + args[:payload] = payload + headers.each{ |k,v| headers.delete(k) if v==nil } if headers #remove keys with empty values, as this can cause problems + args[:headers] = headers + + $logger.debug "post to #{uri} with params #{payload.inspect.to_s[0..1000]}" if method.to_s=="post" + + @request = RestClient::Request.new(args) + # ignore error codes from Task services (may return error codes >= 400 according to API, which causes exceptions in RestClient and RDF::Reader) + @response = @request.execute do |response, request, result| + if [301, 302, 307].include? response.code and request.method == :get + response.follow_redirection(request, result) + elsif response.code >= 400 and !URI.task?(uri) + #TODO add parameters to error-report + #parameters = request.args + #parameters[:headers][:subjectid] = "REMOVED" if parameters[:headers] and parameters[:headers][:subjectid] + #parameters[:url] = parameters[:url].gsub(/(http|https|)\:\/\/[a-zA-Z0-9\-]+\:[a-zA-Z0-9]+\@/, "REMOVED@") if parameters[:url] + #message += "\nREST parameters:\n#{parameters.inspect}" + error = known_errors.collect{|e| e if e[:code] == response.code}.compact.first + begin # errors are returned as error reports in json, try to parse + # TODO: may be the reason for failure of task.rb -n test_11_wait_for_error_task + content = JSON.parse(response) + msg = content["message"].to_s + cause = content["errorCause"].to_s + raise if msg.size==0 && cause.size==0 # parsing failed + rescue # parsing error failed, use complete content as message + msg = "Could not parse error response from rest call '#{method}' to '#{uri}':\n#{response}" + cause = nil + end + Object.method(error[:method]).call msg, uri, cause # call error method + else + response + end + end + end + end + + #@return [Array] of hashes with error code, method and class + def self.known_errors + errors = [] + RestClient::STATUSES.each do |code,k| + if code >= 400 + method = k.underscore.gsub(/ |'/,'_') + method += "_error" unless method.match(/_error$/) + klass = method.split("_").collect{|s| s.capitalize}.join("") + errors << {:code => code, :method => method.to_sym, :class => klass} + end + end + errors + end + + end +end |