Options for different publish properties

Such as content_type, content_encoding etc.

Fixes #13

src/amqpcat.cr

@@ -12,13 +12,12 @@ class AMQPCat
     @client = AMQP::Client.new(u)
   end
 
-  def produce(exchange : String, routing_key : String, exchange_type : String, publish_confirm = false)
+  def produce(exchange : String, routing_key : String, exchange_type : String, publish_confirm : Bool, props : AMQP::Client::Properties)
     STDIN.blocking = false
     loop do
       connection = @client.connect
       channel = connection.channel
       open_channel_declare_exchange(connection, exchange, exchange_type)
-      props = AMQP::Client::Properties.new(delivery_mode: 2_u8)
       while line = STDIN.gets
         if publish_confirm
           channel.basic_publish_confirm line, exchange, routing_key, props: props
@@ -104,7 +103,7 @@ class AMQPCat
     end
   end
 
-  private def write_headers(io, headers)
+  private def print_headers(io, headers)
     headers.each do |k, v|
       io << k << "=" << v << "\n"
     end
@@ -127,7 +126,7 @@ class AMQPCat
           io << msg.routing_key
         when 'h'
           if headers = msg.properties.headers
-            write_headers(io, headers)
+            print_headers(io, headers)
           end
         when 't'
           io << msg.properties.content_type

src/cli.cr

@@ -12,6 +12,7 @@ routing_key : String? = nil
 format = "%s\n"
 publish_confirm = false
 offset = "next"
+props = AMQP::Client::Properties.new(delivery_mode: 2_u8)
 
 FORMAT_STRING_HELP = <<-HELP
 Format string (default "%s\\n")
@@ -46,6 +47,10 @@ p = OptionParser.parse do |parser|
     end
   end
   parser.on("-f FORMAT", "--format=FORMAT", FORMAT_STRING_HELP) { |v| format = v }
+  parser.on("--content-type=TYPE", "Content type header") { |v| props.content_type = v }
+  parser.on("--content-encoding=ENC", "Content encoding header") { |v| props.content_encoding = v }
+  parser.on("--priority=LEVEL", "Priority header") { |v| props.priority = v.to_u8? || abort "Priority must be between 0 and 255" }
+  parser.on("--expiration=TIME", "Expiration header (ms before msg is dead lettered)") { |v| props.expiration = v }
   parser.on("-v", "--version", "Display version") { puts AMQPCat::VERSION; exit 0 }
   parser.on("-h", "--help", "Show this help message") { puts parser; exit 0 }
   parser.invalid_option do |flag|
@@ -61,7 +66,7 @@ when :producer
     STDERR.puts "Error: Missing exchange or queue argument."
     abort p
   end
-  cat.produce(exchange, routing_key || queue || "", exchange_type, publish_confirm)
+  cat.produce(exchange, routing_key || queue || "", exchange_type, publish_confirm, props)
 when :consumer
   unless routing_key || queue
     STDERR.puts "Error: Missing routing key or queue argument."