I'm running a headed application on my Raspberry without any user input (just a display). Since I'd like to change some things in my application I'd like to implement a Webserver and a website where I can adjust some sttings.
I found already how to implement a webserver on this website. But how to display and control HTML elements from c#? Maybe using Node.js?
As far as I can tell your link is obsolete. Nowadays if you're talking C# and webserver you should be talking Kestrel (ASP.Net Core). I mean seriously, from the link you have provided:
var listener = new StreamSocketListener();
await listener.BindServiceNameAsync("8081");
listener.ConnectionReceived += async (sender, args) =>
{
var request = new StringBuilder();
using (var input = args.Socket.InputStream)
{
var data = new byte[BufferSize];
IBuffer buffer = data.AsBuffer();
var dataRead = BufferSize;
while (dataRead == BufferSize)
{
await input.ReadAsync(
buffer, BufferSize, InputStreamOptions.Partial);
request.Append(Encoding.UTF8.GetString(
data, 0, data.Length));
dataRead = buffer.Length;
}
}
string query = GetQuery(request);
using (var output = args.Socket.OutputStream)
{
using (var response = output.AsStreamForWrite())
{
var html = Encoding.UTF8.GetBytes(
$"<html><head><title>Background Message</title></head><body>Hello from the background process!<br/>{query}</body></html>");
using (var bodyStream = new MemoryStream(html))
{
var header = $"HTTP/1.1 200 OK\r\nContent-Length: {bodyStream.Length}\r\nConnection: close\r\n\r\n";
var headerArray = Encoding.UTF8.GetBytes(header);
await response.WriteAsync(headerArray,
0, headerArray.Length);
await bodyStream.CopyToAsync(response);
await response.FlushAsync();
}
}
}
};
Writing your web server? Are you kidding? There's no excuse to pull forward this "a web server as a trivial entity" nonsense. Web servers are NOT hello world programs. I strongly suggest against writing your own "web server". Just don't. It's a fertile breeding ground for bugs and security issues. Are you going to play the "i'm just learning" card? Then learn something useful: using a library/framework!
If you want to try node.js that's a better idea. In my experience for simple stuff it is very viable.
As I understand it, Windows 10 IoT does not run background apps. It is limited to one app per device in that sense.
It's not clear what the setup is here. If you're trying to remotely manipulate the webpage displayed on the Pi, you may be able to host the page someplace else and just have the page refresh periodically (assuming the Pi has network access).
If you are hosting on the Pi and need to send updates to it, you could potentially use a Windows-compatible websocket library (e.g. SignalR) to manage communications and send data / commands to the Pi's browser that way. This could also work if it's hosted somewhere else, so you aren't reloading the entire page each time.
