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HTTP client class

HTTPClient provides low-level access to HTTP communication. For a higher-level interface, you may want to take a look at HTTPRequest first, which has a tutorial available here.

Warning

When exporting to Android, make sure to enable the INTERNET permission in the Android export preset before exporting the project or using one-click deploy. Otherwise, network communication of any kind will be blocked by Android.

Here’s an example of using the HTTPClient class. It’s just a script, so it can be run by executing:

GDScriptC#

  1. c:\godot> godot -s http_test.gd
  1. c:\godot> godot -s HTTPTest.cs

It will connect and fetch a website.

GDScriptC#

  1. extends SceneTree
  3. # HTTPClient demo
  4. # This simple class can do HTTP requests; it will not block, but it needs to be polled.
  6. func _init():
  7.     var err = 0
  8.     var http = HTTPClient.new() # Create the Client.
  10.     err = http.connect_to_host("www.php.net", 80) # Connect to host/port.
  11.     assert(err == OK) # Make sure connection is OK.
  13.     # Wait until resolved and connected.
  14.     while http.get_status() == HTTPClient.STATUS_CONNECTING or http.get_status() == HTTPClient.STATUS_RESOLVING:
  15.         http.poll()
  16.         print("Connecting...")
  17.         if not OS.has_feature("web"):
  18.             OS.delay_msec(500)
  19.         else:
  20.             yield(Engine.get_main_loop(), "idle_frame")
  22.     assert(http.get_status() == HTTPClient.STATUS_CONNECTED) # Check if the connection was made successfully.
  24.     # Some headers
  25.     var headers = [
  26.         "User-Agent: Pirulo/1.0 (Godot)",
  27.         "Accept: */*"
  28.     ]
  30.     err = http.request(HTTPClient.METHOD_GET, "/ChangeLog-5.php", headers) # Request a page from the site (this one was chunked..)
  31.     assert(err == OK) # Make sure all is OK.
  33.     while http.get_status() == HTTPClient.STATUS_REQUESTING:
  34.         # Keep polling for as long as the request is being processed.
  35.         http.poll()
  36.         print("Requesting...")
  37.         if OS.has_feature("web"):
  38.             # Synchronous HTTP requests are not supported on the web,
  39.             # so wait for the next main loop iteration.
  40.             yield(Engine.get_main_loop(), "idle_frame")
  41.         else:
  42.             OS.delay_msec(500)
  44.     assert(http.get_status() == HTTPClient.STATUS_BODY or http.get_status() == HTTPClient.STATUS_CONNECTED) # Make sure request finished well.
  46.     print("response? ", http.has_response()) # Site might not have a response.
  48.     if http.has_response():
  49.         # If there is a response...
  51.         headers = http.get_response_headers_as_dictionary() # Get response headers.
  52.         print("code: ", http.get_response_code()) # Show response code.
  53.         print("**headers:\\n", headers) # Show headers.
  55.         # Getting the HTTP Body
  57.         if http.is_response_chunked():
  58.             # Does it use chunks?
  59.             print("Response is Chunked!")
  60.         else:
  61.             # Or just plain Content-Length
  62.             var bl = http.get_response_body_length()
  63.             print("Response Length: ", bl)
  65.         # This method works for both anyway
  67.         var rb = PackedByteArray() # Array that will hold the data.
  69.         while http.get_status() == HTTPClient.STATUS_BODY:
  70.             # While there is body left to be read
  71.             http.poll()
  72.             # Get a chunk.
  73.             var chunk = http.read_response_body_chunk()
  74.             if chunk.size() == 0:
  75.                 if not OS.has_feature("web"):
  76.                     # Got nothing, wait for buffers to fill a bit.
  77.                     OS.delay_usec(1000)
  78.                 else:
  79.                     yield(Engine.get_main_loop(), "idle_frame")
  80.             else:
  81.                 rb = rb + chunk # Append to read buffer.
  82.         # Done!
  84.         print("bytes got: ", rb.size())
  85.         var text = rb.get_string_from_ascii()
  86.         print("Text: ", text)
  88.     quit()
  1. using Godot;
  3. public partial class HTTPTest : SceneTree
  4. {
  5.     // HTTPClient demo.
  6.     // This simple class can make HTTP requests; it will not block, but it needs to be polled.
  7.     public override async void _Initialize()
  8.     {
  9.         Error err;
  10.         HTTPClient http = new HTTPClient(); // Create the client.
  12.         err = http.ConnectToHost("www.php.net", 80); // Connect to host/port.
  13.         Debug.Assert(err == Error.Ok); // Make sure the connection is OK.
  15.         // Wait until resolved and connected.
  16.         while (http.GetStatus() == HTTPClient.Status.Connecting || http.GetStatus() == HTTPClient.Status.Resolving)
  17.         {
  18.             http.Poll();
  19.             GD.Print("Connecting...");
  20.             OS.DelayMsec(500);
  21.         }
  23.         Debug.Assert(http.GetStatus() == HTTPClient.Status.Connected); // Check if the connection was made successfully.
  25.         // Some headers.
  26.         string[] headers = { "User-Agent: Pirulo/1.0 (Godot)", "Accept: */*" };
  28.         err = http.Request(HTTPClient.Method.Get, "/ChangeLog-5.php", headers); // Request a page from the site.
  29.         Debug.Assert(err == Error.Ok); // Make sure all is OK.
  31.         // Keep polling for as long as the request is being processed.
  32.         while (http.GetStatus() == HTTPClient.Status.Requesting)
  33.         {
  34.             http.Poll();
  35.             GD.Print("Requesting...");
  36.             if (OS.HasFeature("web"))
  37.             {
  38.                 // Synchronous HTTP requests are not supported on the web,
  39.                 // so wait for the next main loop iteration.
  40.                 await ToSignal(Engine.GetMainLoop(), "idle_frame");
  41.             }
  42.             else
  43.             {
  44.                 OS.DelayMsec(500);
  45.             }
  46.         }
  48.         Debug.Assert(http.GetStatus() == HTTPClient.Status.Body || http.GetStatus() == HTTPClient.Status.Connected); // Make sure the request finished well.
  50.         GD.Print("Response? ", http.HasResponse()); // The site might not have a response.
  52.         // If there is a response...
  53.         if (http.HasResponse())
  54.         {
  55.             headers = http.GetResponseHeaders(); // Get response headers.
  56.             GD.Print("Code: ", http.GetResponseCode()); // Show response code.
  57.             GD.Print("Headers:");
  58.             foreach (string header in headers)
  59.             {
  60.                 // Show headers.
  61.                 GD.Print(header);
  62.             }
  64.             if (http.IsResponseChunked())
  65.             {
  66.                 // Does it use chunks?
  67.                 GD.Print("Response is Chunked!");
  68.             }
  69.             else
  70.             {
  71.                 // Or just Content-Length.
  72.                 GD.Print("Response Length: ", http.GetResponseBodyLength());
  73.             }
  75.             // This method works for both anyways.
  76.             List<byte> rb = new List<byte>(); // List that will hold the data.
  78.             // While there is data left to be read...
  79.             while (http.GetStatus() == HTTPClient.Status.Body)
  80.             {
  81.                 http.Poll();
  82.                 byte[] chunk = http.ReadResponseBodyChunk(); // Read a chunk.
  83.                 if (chunk.Length == 0)
  84.                 {
  85.                     // If nothing was read, wait for the buffer to fill.
  86.                     OS.DelayMsec(500);
  87.                 }
  88.                 else
  89.                 {
  90.                     // Append the chunk to the read buffer.
  91.                     rb.AddRange(chunk);
  92.                 }
  93.             }
  95.             // Done!
  96.             GD.Print("Bytes Downloaded: ", rb.Count);
  97.             string text = Encoding.ASCII.GetString(rb.ToArray());
  98.             GD.Print(text);
  99.         }
  100.         Quit();
  101.     }
  102. }