static void Main(string[] args)
{
const int port = 8000;
var wwwPath = args.Length > 0 ? args[0] : "../../../www";
using (var embedIOContext = new EmbedIOContext($"http://+:{port}/", wwwPath)) {
// When a client subscribes to "data-feed", create an instance of RunEvery that pushes
// a new row over the channel every 1000ms
embedIOContext.SubscriptionApi.OnSubscribe("data-feed", (vars, channel) => {
return(new RunEvery(() => {
var row = GetRow();
// You can specify whatever data type you wish to help your clients
// understand what they are receiving, just using "data" in this example
channel.Queue("data", row);
}, 1000));
});
embedIOContext.Start();
ProcessX.OpenBrowser($"http://localhost:{port}/");
Console.ReadLine();
}
}
// Using async Task Main() requires adding <LangVersion>latest</LangVersion> to .csproj file
static async Task Main(string[] args)
{
const int port = 8000;
var wwwPath = args.Length > 0 ? args[0] : "../../../www";
using (var embedIOContext = new Butterfly.Web.EmbedIO.EmbedIOContext($"http://+:{port}/", wwwPath)) {
// Create a MemoryDatabase (no persistence, limited features)
var database = new Butterfly.Db.Memory.MemoryDatabase();
await database.CreateFromSqlAsync(@"CREATE TABLE message (
id INT NOT NULL AUTO_INCREMENT,
text VARCHAR(40) NOT NULL,
PRIMARY KEY (id)
);");
// Listen for API requests
embedIOContext.WebApi.OnPost("/api/message/insert", async(req, res) => {
var text = await req.ParseAsJsonAsync <dynamic>();
await database.InsertAndCommitAsync <long>("message", new {
text
});
});
// Listen for subscribe requests...
// - The handler must return an IDisposable object (gets disposed when the channel is unsubscribed)
// - The handler can push data to the client by calling channel.Queue()
embedIOContext.SubscriptionApi.OnSubscribe("my-channel", (vars, channel) => {
return(database.CreateAndStartDynamicViewAsync("message", dataEventTransaction => channel.Queue(dataEventTransaction)));
});
embedIOContext.Start();
Console.WriteLine($"Opening http://localhost:{port}/ in a browser...");
ProcessX.OpenBrowser($"http://localhost:{port}/");
Console.ReadLine();
}
}