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module OpenTox
#PENDING: implement ot error api, move to own file
class Error
attr_accessor :code, :body, :uri, :payload, :headers
def initialize(code, body, uri, payload, headers)
self.code = code
self.body = body.to_s[0..1000]
self.uri = uri
self.payload = payload
self.headers = headers
end
def self.parse(error_array_string)
begin
err = YAML.load(error_array_string)
if err and err.is_a?(Array) and err.size>0 and err[0].is_a?(Error)
return err
else
return nil
end
rescue
return nil
end
end
end
class WrapperResult < String
attr_accessor :content_type, :code
end
class RestClientWrapper
def self.get(uri, headers=nil, wait=true)
execute( "get", uri, headers, nil, wait)
end
def self.post(uri, headers, payload=nil, wait=true)
execute( "post", uri, headers, payload, wait )
end
def self.put(uri, headers, payload=nil )
execute( "put", uri, headers, payload )
end
def self.delete(uri, headers=nil)
execute( "delete", uri, headers, nil)
end
def self.raise_uri_error(error_msg, uri, headers=nil, payload=nil)
do_halt( "-", error_msg, uri, headers, payload )
end
private
def self.execute( rest_call, uri, headers, payload=nil, wait=true )
do_halt 400,"uri is null",uri,headers,payload unless uri
do_halt 400,"not a uri",uri,headers,payload unless Utils.is_uri?(uri)
do_halt 400,"headers are no hash",uri,headers,payload unless headers==nil or headers.is_a?(Hash)
do_halt 400,"nil headers for post not allowed, use {}",uri,headers,payload if rest_call=="post" and headers==nil
headers.each{ |k,v| headers.delete(k) if v==nil } if headers #remove keys with empty values, as this can cause problems
begin
#LOGGER.debug "RestCall: "+rest_call.to_s+" "+uri.to_s+" "+headers.inspect
resource = RestClient::Resource.new(uri,{:timeout => 60}) #, :user => @@users[:users].keys[0], :password => @@users[:users].values[0]})
if payload
result = resource.send(rest_call, payload, headers)
elsif headers
result = resource.send(rest_call, headers)
else
result = resource.send(rest_call)
end
# result is a string, with the additional fields content_type and code
res = WrapperResult.new(result.body)
res.content_type = result.headers[:content_type]
raise "content-type not set" unless res.content_type
res.code = result.code
return res if res.code==200 || !wait
while (res.code==201 || res.code==202)
res = wait_for_task(res, uri)
end
raise "illegal status code: '"+res.code.to_s+"'" unless res.code==200
return res
rescue RestClient::RequestTimeout => ex
do_halt 408,ex.message,uri,headers,payload
rescue => ex
#raise ex
#raise "'"+ex.message+"' uri: "+uri.to_s
begin
code = ex.http_code
msg = ex.http_body
rescue
code = 500
msg = ex.to_s
end
do_halt code,msg,uri,headers,payload
end
end
def self.wait_for_task( res, base_uri )
task = nil
case res.content_type
when /application\/rdf\+xml|application\/x-yaml/
task = OpenTox::Task.from_data(res, res.content_type, res.code, base_uri)
when /text\//
raise "uri list has more than one entry, should be a task" if res.content_type=~/text\/uri-list/ and
res.split("\n").size > 1 #if uri list contains more then one uri, its not a task
task = OpenTox::Task.find(res.to_s) if Utils.task_uri?(res)
else
raise "unknown content-type for task: '"+res.content_type.to_s+"'" #+"' content: "+res[0..200].to_s
end
LOGGER.debug "result is a task '"+task.uri.to_s+"', wait for completion"
task.wait_for_completion
raise task.description unless task.completed? # maybe task was cancelled / error
res = WrapperResult.new task.resultURI
res.code = task.http_code
res.content_type = "text/uri-list"
return res
end
def self.do_halt( code, body, uri, headers, payload=nil )
#build error
causing_errors = Error.parse(body)
if causing_errors
error = causing_errors + [Error.new(code, "subsequent error", uri, payload, headers)]
else
error = [Error.new(code, body, uri, payload, headers)]
end
#debug utility: write error to file
error_dir = "/tmp/ot_errors"
FileUtils.mkdir(error_dir) unless File.exist?(error_dir)
raise "could not create error dir" unless File.exist?(error_dir) and File.directory?(error_dir)
file_name = "error"
time=Time.now.strftime("%m.%d.%Y-%H:%M:%S")
count = 1
count+=1 while File.exist?(File.join(error_dir,file_name+"_"+time+"_"+count.to_s))
File.new(File.join(error_dir,file_name+"_"+time+"_"+count.to_s),"w").puts(body)
# handle error
# we are either in a task, or in sinatra
# PENDING: always return yaml for now
if $self_task #this global var in Task.as_task to mark that the current process is running in a task
raise error.to_yaml # the error is caught, logged, and task state is set to error in Task.as_task
#elsif $sinatra #else halt sinatra
#$sinatra.halt(502,error.to_yaml)
elsif defined?(halt)
halt(502,error.to_yaml)
else #for testing purposes (if classes used directly)
raise error.to_yaml
end
end
end
end
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