aria2 add download using JSON-RPC

aria2-add.csx

/*
 * scriptcs -install Newtonsoft.Json
 * scriptcs -install CommandLineParser
 */
 
 
using System.Net;

using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

using CommandLine;
using CommandLine.Text;

class Options
{	
	[Option('u', "uri", Required = true, HelpText = "File URI")]
	public string Uri { get; set; }

	[Option('h', "host", Required = false, HelpText = "Address of aria2 server", DefaultValue="http://localhost:6800/jsonrpc")]
	public string Host { get; set; }
	
	[Option('o', "output", Required = false, HelpText = "Output file name")]
	public string OutputFile { get; set; }

	[HelpOption]
	public string GetUsage()
	{
		return HelpText.AutoBuild(this,
		  (HelpText current) => HelpText.DefaultParsingErrorsHandler(this, current));
	}

}

string BuildJsonRequest(string uri, string name=null)
{
	var jsonObject = new JObject();
	jsonObject["jsonrpc"] = "2.0";
	jsonObject["method"] = "aria2.addUri";
	jsonObject["id"] = "1";
	var requestParams = new JArray();
	var uris = new JArray();
	uris.Add(uri);
	requestParams.Add(uris);
	if (name != null)
	{
		var options = new JObject();
		options["out"] = name;
		requestParams.Add(options);
	}
	jsonObject["params"] = requestParams;
	string json = JsonConvert.SerializeObject(jsonObject);
	//var json = jsonObject.ToString();
	return json;
}

var options = new Options();
if (CommandLine.Parser.Default.ParseArguments(Env.ScriptArgs.ToArray(), options))
{
	var jsonRequest = BuildJsonRequest(options.Uri, options.OutputFile);
	using (var webClient = new WebClient())
	{
		var response = webClient.UploadString(options.Host, "POST", jsonRequest);
		Console.WriteLine(response);
	}
}