Class: Rho::RHO

Inherits:
Object show all
Defined in:
lib/rho/rho.rb

Constant Summary collapse

APPLICATIONS = 
{}
CR = 
"\x0d"
LF = 
"\x0a"
CRLF = 
"\x0d\x0a"

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(app_manifest_filename = nil) ⇒ RHO

Returns a new instance of RHO.



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# File 'lib/rho/rho.rb', line 11

def initialize(app_manifest_filename=nil)
  puts "Calling RHO.initialize"
  process_rhoconfig
  Rhom::RhomDbAdapter::open(Rho::RhoFSConnector::get_db_fullpathname)
  if app_manifest_filename
    process_model_dirs(app_manifest_filename)
  else
    process_model_dirs(Rho::RhoFSConnector::get_app_manifest_filename)
  end
  init_sources
end

Class Method Details

.finalize ⇒ Object

make sure we close the database file



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# File 'lib/rho/rho.rb', line 24

def self.finalize
  Rhom::RhomDbAdapter::close
end

Instance Method Details

#get_app(appname) ⇒ Object 



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# File 'lib/rho/rho.rb', line 78

def get_app(appname)
  if (APPLICATIONS[appname].nil?)
    require RhoApplication::get_app_path(appname)+'application'
    #APPLICATIONS[appname] = Object.const_get(appname+'Application').new
    APPLICATIONS[appname] = Object.const_get('AppApplication').new
  end
  APPLICATIONS[appname]
end

#init_response(status = 200, message = "OK", body = "") ⇒ Object 



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# File 'lib/rho/rho.rb', line 131

def init_response(status=200,message="OK",body="")
  res = Hash.new
  res['status'] = status
  res['message'] = message
  res['headers'] = 
    {
    'Date' => Time.now.httpdate,
    'Content-Type' => 'text/html',
    'Content-Length' => 0,
    'Connection' => 'close' 
  }
  res['request-body'] = body
  res
end

#init_sources ⇒ Object

setup the sources table and model attributes for all applications



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# File 'lib/rho/rho.rb', line 53

def init_sources
  if defined? Rho::RhoConfig::sources
    
    # quick and dirty way to get unique array of hashes
    uniq_sources = Rho::RhoConfig::sources.values.inject([]) { |result,h| 
      result << h unless result.include?(h); result
    }
    
    # generate unique source list in database for sync
    uniq_sources.each do |source|
      
      src_id = source['source_id']
      url = source['url']
      if !self.source_initialized?(src_id)
        Rhom::RhomDbAdapter::insert_into_table('sources',
                                              {"source_id"=>src_id,"source_url"=>url})
      end
    end
  end
end

#process_model_dirs(app_manifest_filename = nil) ⇒ Object

Return the directories where we need to load configuration files



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# File 'lib/rho/rho.rb', line 29

def process_model_dirs(app_manifest_filename=nil)
  File.open(app_manifest_filename).each do |line|
    require File.join(File.dirname(app_manifest_filename), line.chop)
  end
end

#process_rhoconfig ⇒ Object

Return the directories where we need to load configuration files



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# File 'lib/rho/rho.rb', line 36

def process_rhoconfig
  begin
    File.open(Rho::RhoFSConnector.get_rhoconfig_filename).each do |line|
      parts = line.chop.split('=')
      key = parts[0]
      value = parts[1..parts.length-1].join('=') if parts and parts.length > 1
      if key and value
        tmp = value.strip!
        Rho::RhoConfig.config[key.strip] = tmp.gsub(/'|"/,'') if tmp
      end  
    end
  rescue Exception => e
    puts "Error opening rhoconfig.txt: #{e}, using defaults."
  end
end

#send_error(exception = nil, status = 500, hash = false) ⇒ Object 



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# File 'lib/rho/rho.rb', line 185

def send_error(exception=nil,status=500,hash=false)
  body=''
  body << <<-_HTML_STRING_
    <html>
        <head>
            <title>Server Error</title>
            <meta name="viewport" content="width=320"/>
        </head>
        <body>
            <p>
  _HTML_STRING_
  body << 'Error: ' << exception.message << "<br/>" if exception
  body << 'Trace: ' << exception.backtrace.join("\n") if exception
  body << <<-_HTML_STRING_
            </p>    
        </body>
    </html>
    
  _HTML_STRING_
  if ( hash )
    send_response_hash(init_response(status,"Server error",body))
  else
    send_response(init_response(status,"Server error",body))
  end
end

#send_response(res) ⇒ Object 



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# File 'lib/rho/rho.rb', line 150

def send_response(res)
  res['headers']['Content-Length'] = res['request-body'].nil? ? 0 : res['request-body'].length
  data = "HTTP/1.1 #{res['status'].to_s} #{res['message']}" + CRLF
  res['headers'].each{|key, value|
    tmp = key.gsub(/\bwww|^te$|\b\w/){|s| s.upcase }
    data << "#{tmp}: #{value}" << CRLF
  }
data << "Pragma: no-cache" << CRLF
data << "Cache-Control: must-revalidate" << CRLF
data << "Cache-Control: no-cache" << CRLF
data << "Cache-Control: no-store" << CRLF
data << "Expires: 0" << CRLF

  data << CRLF
	  if ( !res['request-body'].nil? )
		data << res['request-body']
	  end

  data
end

#send_response_hash(res) ⇒ Object 



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# File 'lib/rho/rho.rb', line 171

def send_response_hash(res)
    resp = Hash.new
    res['headers']['Content-Length'] = res['request-body'].nil? ? 0 : res['request-body'].length
    res['headers'].each{|key, value|
        tmp = key.gsub(/\bwww|^te$|\b\w/){|s| s.upcase }
        resp[tmp] = value
    }
    resp['request-body'] = res['request-body']
    resp['status'] = res['status']        
    resp['message'] = res['message']
    
    resp
end

#serve(req) ⇒ Object 



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# File 'lib/rho/rho.rb', line 87

def serve(req)
  begin
    puts 'inside RHO.serve...'
    res = init_response
    get_app(req['application']).send :serve, req, res
    return send_response(res)
  rescue Exception => e
    return send_error(e)
  end   
end

#serve_hash(req) ⇒ Object 



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# File 'lib/rho/rho.rb', line 98

def serve_hash(req)
    begin
        puts 'inside RHO.serve...'
        res = init_response
        get_app(req['application']).send :serve, req, res
        return send_response_hash(res)
    rescue Exception => e
        return send_error(e,500,true)
    end 
end

#serve_index(index_name) ⇒ Object 



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# File 'lib/rho/rho.rb', line 109

def serve_index(index_name)
    begin
        puts 'inside RHO.serve_index: ' + index_name
        res = init_response
        res['request-body'] = RhoController::renderfile(index_name)
        return send_response(res)
    rescue Exception => e
        return send_error(e)
    end
end

#serve_index_hash(index_name) ⇒ Object 



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# File 'lib/rho/rho.rb', line 120

def serve_index_hash(index_name)
    begin
        puts 'inside RHO.serve_index: ' + index_name
        res = init_response
        res['request-body'] = RhoController::renderfile(index_name)
        return send_response_hash(res)
    rescue Exception => e
        return send_error(e.message, 500, true)
    end
end

#source_initialized?(source_id) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rho/rho.rb', line 74

def source_initialized?(source_id)
  Rhom::RhomDbAdapter::select_from_table('sources','*', 'source_id'=>source_id).size > 0 ? true : false
end