aperezdc/minicog-urihandler-cors.c

## minicog-urihandler-cors.c
/*
 * SPDX-License-Identifier: MIT
 *
 * cc -o minicog minicog.c $(pkg-config wpe-webkit-1.1 cogcore --cflags --libs)
 */

#include <cog/cog.h>

static const char *s_starturl = NULL;

static void
handle_echo_request(WebKitURISchemeRequest *request, void *userdata)
{
    const char *request_uri = webkit_uri_scheme_request_get_uri(request);
    g_print("Request URI: %s (%s)\n", request_uri, webkit_uri_scheme_request_get_http_method(request));

    g_autoptr(GBytes) data = g_bytes_new(request_uri, strlen(request_uri));
    g_autoptr(GInputStream) stream = g_memory_input_stream_new_from_bytes(data);

    g_autoptr(SoupMessageHeaders) headers = soup_message_headers_new(SOUP_MESSAGE_HEADERS_RESPONSE);
    soup_message_headers_replace(headers, "Access-Control-Allow-Origin", "*");
    soup_message_headers_replace(headers, "Access-Control-Allow-Methods", "GET");

    g_autoptr(WebKitURISchemeResponse) response = webkit_uri_scheme_response_new(stream, g_bytes_get_size(data));
    webkit_uri_scheme_response_set_http_headers(response, g_steal_pointer(&headers));
    webkit_uri_scheme_response_set_content_type(response, "text/plain");
    webkit_uri_scheme_response_set_status(response, 200, NULL);

    webkit_uri_scheme_request_finish_with_response(request, response);
}

static void
configure_web_context(WebKitWebContext *context)
{
    webkit_web_context_register_uri_scheme(context, "echo", handle_echo_request, NULL, NULL);

    WebKitSecurityManager *manager = webkit_web_context_get_security_manager(context);
    webkit_security_manager_register_uri_scheme_as_cors_enabled(manager, "echo");
}

static WebKitWebView*
on_create_view(CogShell *shell, CogPlatform *platform)
{
    g_autoptr(GError) error = NULL;
    WebKitWebViewBackend *view_backend = cog_platform_get_view_backend(platform, NULL, &error);
    if (!view_backend)
        g_error("Cannot obtain view backend: %s", error->message);

    configure_web_context(cog_shell_get_web_context(shell));

    WebKitSettings *settings = cog_shell_get_web_settings(shell);
    webkit_settings_set_enable_write_console_messages_to_stdout(settings, TRUE);

    g_autoptr(WebKitWebView) web_view =
        g_object_new(WEBKIT_TYPE_WEB_VIEW,
                     "settings", settings,
                     "web-context", cog_shell_get_web_context(shell),
                     "backend", view_backend,
                     NULL);

    cog_platform_init_web_view(platform, web_view);

    webkit_web_view_load_uri(web_view, s_starturl);
    return g_steal_pointer(&web_view);
}

int
main(int argc, char *argv[])
{
    g_set_application_name("minicog");

    if (argc != 2 && argc != 3) {
        g_printerr("Usage: %s [URL [platform]]\n", argv[0]);
        return EXIT_FAILURE;
    }

    g_autoptr(GError) error = NULL;
    if (!(s_starturl = cog_uri_guess_from_user_input(argv[1], TRUE, &error)))
        g_error("Invalid URL '%s': %s", argv[1], error->message);

    cog_modules_add_directory(COG_MODULEDIR);

    g_autoptr(GApplication) app = g_application_new(NULL, G_APPLICATION_DEFAULT_FLAGS);
    g_autoptr(CogShell) shell = cog_shell_new("minicog", FALSE);

    g_autoptr(CogPlatform) platform =
        cog_platform_new((argc == 3) ? argv[2] : g_getenv("COG_PLATFORM"), &error);
    if (!platform)
        g_error("Cannot create platform: %s", error->message);

    if (!cog_platform_setup(platform, shell, "", &error))
        g_error("Cannot setup platform: %s\n", error->message);

    g_signal_connect(shell, "create-view", G_CALLBACK(on_create_view), platform);
    g_signal_connect_swapped(app, "shutdown", G_CALLBACK(cog_shell_shutdown), shell);
    g_signal_connect_swapped(app, "startup", G_CALLBACK(cog_shell_startup), shell);
    g_signal_connect(app, "activate", G_CALLBACK(g_application_hold), NULL);

    return g_application_run(app, 1, argv);
}

## test.html
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>URI Scheme CORS Test</title>
  </head>
  <body>
    <p id="output"></p>
    <button id="doit">Do it!</button>
    <script type="text/javascript">
      document.getElementById("doit").addEventListener("click", async function (event) {
          let res = await fetch("echo:/the/answer/is/42");
	  let el = document.getElementById("output");
	  el.innerHTML = await res.text();
	  return false;
      });
    </script>
  </body>
</html>
	/*
	* SPDX-License-Identifier: MIT
	*
	* cc -o minicog minicog.c $(pkg-config wpe-webkit-1.1 cogcore --cflags --libs)
	*/

	#include <cog/cog.h>

	static const char *s_starturl = NULL;

	static void
	handle_echo_request(WebKitURISchemeRequest request, void userdata)
	{
	const char *request_uri = webkit_uri_scheme_request_get_uri(request);
	g_print("Request URI: %s (%s)\n", request_uri, webkit_uri_scheme_request_get_http_method(request));

	g_autoptr(GBytes) data = g_bytes_new(request_uri, strlen(request_uri));
	g_autoptr(GInputStream) stream = g_memory_input_stream_new_from_bytes(data);

	g_autoptr(SoupMessageHeaders) headers = soup_message_headers_new(SOUP_MESSAGE_HEADERS_RESPONSE);
	soup_message_headers_replace(headers, "Access-Control-Allow-Origin", "*");
	soup_message_headers_replace(headers, "Access-Control-Allow-Methods", "GET");

	g_autoptr(WebKitURISchemeResponse) response = webkit_uri_scheme_response_new(stream, g_bytes_get_size(data));
	webkit_uri_scheme_response_set_http_headers(response, g_steal_pointer(&headers));
	webkit_uri_scheme_response_set_content_type(response, "text/plain");
	webkit_uri_scheme_response_set_status(response, 200, NULL);

	webkit_uri_scheme_request_finish_with_response(request, response);
	}

	static void
	configure_web_context(WebKitWebContext *context)
	{
	webkit_web_context_register_uri_scheme(context, "echo", handle_echo_request, NULL, NULL);

	WebKitSecurityManager *manager = webkit_web_context_get_security_manager(context);
	webkit_security_manager_register_uri_scheme_as_cors_enabled(manager, "echo");
	}

	static WebKitWebView*
	on_create_view(CogShell shell, CogPlatform platform)
	{
	g_autoptr(GError) error = NULL;
	WebKitWebViewBackend *view_backend = cog_platform_get_view_backend(platform, NULL, &error);
	if (!view_backend)
	g_error("Cannot obtain view backend: %s", error->message);

	configure_web_context(cog_shell_get_web_context(shell));

	WebKitSettings *settings = cog_shell_get_web_settings(shell);
	webkit_settings_set_enable_write_console_messages_to_stdout(settings, TRUE);

	g_autoptr(WebKitWebView) web_view =
	g_object_new(WEBKIT_TYPE_WEB_VIEW,
	"settings", settings,
	"web-context", cog_shell_get_web_context(shell),
	"backend", view_backend,
	NULL);

	cog_platform_init_web_view(platform, web_view);

	webkit_web_view_load_uri(web_view, s_starturl);
	return g_steal_pointer(&web_view);
	}

	int
	main(int argc, char *argv[])
	{
	g_set_application_name("minicog");

	if (argc != 2 && argc != 3) {
	g_printerr("Usage: %s [URL [platform]]\n", argv[0]);
	return EXIT_FAILURE;
	}

	g_autoptr(GError) error = NULL;
	if (!(s_starturl = cog_uri_guess_from_user_input(argv[1], TRUE, &error)))
	g_error("Invalid URL '%s': %s", argv[1], error->message);

	cog_modules_add_directory(COG_MODULEDIR);

	g_autoptr(GApplication) app = g_application_new(NULL, G_APPLICATION_DEFAULT_FLAGS);
	g_autoptr(CogShell) shell = cog_shell_new("minicog", FALSE);

	g_autoptr(CogPlatform) platform =
	cog_platform_new((argc == 3) ? argv[2] : g_getenv("COG_PLATFORM"), &error);
	if (!platform)
	g_error("Cannot create platform: %s", error->message);

	if (!cog_platform_setup(platform, shell, "", &error))
	g_error("Cannot setup platform: %s\n", error->message);

	g_signal_connect(shell, "create-view", G_CALLBACK(on_create_view), platform);
	g_signal_connect_swapped(app, "shutdown", G_CALLBACK(cog_shell_shutdown), shell);
	g_signal_connect_swapped(app, "startup", G_CALLBACK(cog_shell_startup), shell);
	g_signal_connect(app, "activate", G_CALLBACK(g_application_hold), NULL);

	return g_application_run(app, 1, argv);
	}
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8" />
	<title>URI Scheme CORS Test</title>
	</head>
	<body>
	<p id="output"></p>
	<button id="doit">Do it!</button>
	<script type="text/javascript">
	document.getElementById("doit").addEventListener("click", async function (event) {
	let res = await fetch("echo:/the/answer/is/42");
	let el = document.getElementById("output");
	el.innerHTML = await res.text();
	return false;
	});
	</script>
	</body>
	</html>