Class: Fluent::HTTPOutput

Inherits:
Output
  • Object
show all
Defined in:
lib/fluent/plugin/out_http.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ HTTPOutput

Returns a new instance of HTTPOutput.



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# File 'lib/fluent/plugin/out_http.rb', line 4

def initialize
  super
  require 'net/http'
  require 'uri'
  require 'yajl'
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_http.rb', line 39

def configure(conf)
  super

  @ssl_verify_mode = if @ssl_no_verify
                       OpenSSL::SSL::VERIFY_NONE
                     else
                       OpenSSL::SSL::VERIFY_PEER
                     end

  @ca_file = @cacert_file

  serializers = [:json, :form, :text]
  @serializer = if serializers.include? @serializer.intern
                  @serializer.intern
                else
                  :form
                end

  http_methods = [:get, :put, :post, :delete]
  @http_method = if http_methods.include? @http_method.intern
                  @http_method.intern
                else
                  :post
                end

  @auth = case @authentication
          when 'basic' then :basic
          when 'bearer' then :bearer
          when 'jwt' then :jwt
          else
            :none
          end

  @last_request_time = nil
end

#create_request(tag, time, record) ⇒ Object 



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# File 'lib/fluent/plugin/out_http.rb', line 112

def create_request(tag, time, record)
  url = format_url(tag, time, record)
  uri = URI.parse(url)
  req = Net::HTTP.const_get(@http_method.to_s.capitalize).new(uri.path)
  set_body(req, tag, time, record)
  set_header(req, tag, time, record)
  return req, uri
end

#emit(tag, es, chain) ⇒ Object 



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# File 'lib/fluent/plugin/out_http.rb', line 170

def emit(tag, es, chain)
  es.each do |time, record|
    handle_record(tag, time, record)
  end
  chain.next
end

#format_url(tag, time, record) ⇒ Object 



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# File 'lib/fluent/plugin/out_http.rb', line 83

def format_url(tag, time, record)
  @endpoint_url
end

#handle_record(tag, time, record) ⇒ Object

end send_request



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# File 'lib/fluent/plugin/out_http.rb', line 165

def handle_record(tag, time, record)
  req, uri = create_request(tag, time, record)
  send_request(req, uri)
end

#http_opts(uri) ⇒ Object 



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# File 'lib/fluent/plugin/out_http.rb', line 121

def http_opts(uri)
    opts = {
      :use_ssl => uri.scheme == 'https'
    }
    opts[:verify_mode] = @ssl_verify_mode if opts[:use_ssl]
    opts[:ca_file] = File.join(@ca_file) if File.file?(@ca_file)
    opts
end

#send_request(req, uri) ⇒ Object 



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# File 'lib/fluent/plugin/out_http.rb', line 130

def send_request(req, uri)
  is_rate_limited = (@rate_limit_msec != 0 and not @last_request_time.nil?)
  if is_rate_limited and ((Time.now.to_f - @last_request_time) * 1000.0 < @rate_limit_msec)
    $log.info('Dropped request due to rate limiting')
    return
  end

  res = nil

  begin
    if @auth and @auth == :basic
      req.basic_auth(@username, @password)
    elsif @auth and @auth == :bearer
      req['authorization'] = "bearer #{@token}"
    elsif @auth and @auth == :jwt
      req['authorization'] = "jwt #{@token}"
    end
    @last_request_time = Time.now.to_f
    res = Net::HTTP.start(uri.host, uri.port, **http_opts(uri)) {|http| http.request(req) }
  rescue => e # rescue all StandardErrors
    # server didn't respond
    $log.warn "Net::HTTP.#{req.method.capitalize} raises exception: #{e.class}, '#{e.message}'"
    raise e if @raise_on_error
  else
     unless res and res.is_a?(Net::HTTPSuccess)
        res_summary = if res
                         "#{res.code} #{res.message} #{res.body}"
                      else
                         "res=nil"
                      end
        $log.warn "failed to #{req.method} #{uri} (#{res_summary})"
     end #end unless
  end # end begin
end

#set_body(req, tag, time, record) ⇒ Object 



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# File 'lib/fluent/plugin/out_http.rb', line 87

def set_body(req, tag, time, record)
  if @serializer == :json
    set_json_body(req, record)
  elsif @serializer == :text
    set_text_body(req, record)
  else
    req.set_form_data(record)
  end
  req
end

#set_header(req, tag, time, record) ⇒ Object 



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# File 'lib/fluent/plugin/out_http.rb', line 98

def set_header(req, tag, time, record)
  req
end

#set_json_body(req, data) ⇒ Object 



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# File 'lib/fluent/plugin/out_http.rb', line 102

def set_json_body(req, data)
  req.body = Yajl.dump(data)
  req['Content-Type'] = 'application/json'
end

#set_text_body(req, data) ⇒ Object 



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# File 'lib/fluent/plugin/out_http.rb', line 107

def set_text_body(req, data)
  req.body = data["message"]
  req['Content-Type'] = 'text/plain'
end

#shutdown ⇒ Object 



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# File 'lib/fluent/plugin/out_http.rb', line 79

def shutdown
  super
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/out_http.rb', line 75

def start
  super
end