HTTP 客户端类

HTTPClient 提供了对HTTP通信的低层次访问. 对于一个更高级的接口, 你可能需要看看 HTTPRequest , 它有一个可用的教程 here.

警告

当导出到 Android 时，在导出项目或使用一键部署之前，确保在 Android 导出预设中启用 INTERNET 权限。否则，任何形式的网络通信都会被 Android 系统阻止。

这是使用 HTTPClient 类的示例. 它只是一个脚本, 因此它可以通过执行以下命令来运行:

c:\godot> godot -s http_test.gd

它将连接并获取一个网站.

extends SceneTree

# HTTPClient demo
# This simple class can do HTTP requests; it will not block, but it needs to be polled.

func _init():
    var err = 0
    var http = HTTPClient.new() # Create the Client.

    err = http.connect_to_host("www.php.net", 80) # Connect to host/port.
    assert(err == OK) # Make sure connection is OK.

    # Wait until resolved and connected.
    while http.get_status() == HTTPClient.STATUS_CONNECTING or http.get_status() == HTTPClient.STATUS_RESOLVING:
        http.poll()
        print("Connecting...")
        if not OS.has_feature("web"):
            OS.delay_msec(500)
        else:
            yield(Engine.get_main_loop(), "idle_frame")

    assert(http.get_status() == HTTPClient.STATUS_CONNECTED) # Check if the connection was made successfully.

    # Some headers
    var headers = [
        "User-Agent: Pirulo/1.0 (Godot)",
        "Accept: */*"
    ]

    err = http.request(HTTPClient.METHOD_GET, "/ChangeLog-5.php", headers) # Request a page from the site (this one was chunked..)
    assert(err == OK) # Make sure all is OK.

    while http.get_status() == HTTPClient.STATUS_REQUESTING:
        # Keep polling for as long as the request is being processed.
        http.poll()
        print("Requesting...")
        if OS.has_feature("web"):
            # Synchronous HTTP requests are not supported on the web,
            # so wait for the next main loop iteration.
            yield(Engine.get_main_loop(), "idle_frame")
        else:
            OS.delay_msec(500)

    assert(http.get_status() == HTTPClient.STATUS_BODY or http.get_status() == HTTPClient.STATUS_CONNECTED) # Make sure request finished well.

    print("response? ", http.has_response()) # Site might not have a response.

    if http.has_response():
        # If there is a response...

        headers = http.get_response_headers_as_dictionary() # Get response headers.
        print("code: ", http.get_response_code()) # Show response code.
        print("**headers:\\n", headers) # Show headers.

        # Getting the HTTP Body

        if http.is_response_chunked():
            # Does it use chunks?
            print("Response is Chunked!")
        else:
            # Or just plain Content-Length
            var bl = http.get_response_body_length()
            print("Response Length: ", bl)

        # This method works for both anyway

        var rb = PoolByteArray() # Array that will hold the data.

        while http.get_status() == HTTPClient.STATUS_BODY:
            # While there is body left to be read
            http.poll()
            # Get a chunk.
            var chunk = http.read_response_body_chunk()
            if chunk.size() == 0:
                if not OS.has_feature("web"):
                    # Got nothing, wait for buffers to fill a bit.
                    OS.delay_usec(1000)
                else:
                    yield(Engine.get_main_loop(), "idle_frame")
            else:
                rb = rb + chunk # Append to read buffer.
        # Done!

        print("bytes got: ", rb.size())
        var text = rb.get_string_from_ascii()
        print("Text: ", text)

    quit()