fix(desktop): honour the system proxy in main-process requests (#3270)

fluxer_app/src/features/gateway/transport/GatewayWireTransport.test.ts

@@ -9,9 +9,10 @@ import {
 	isDesktopNativeGatewayTransportAvailable,
 } from '@app/features/gateway/transport/GatewayWireTransport';
 import {isDesktopLocalAppDocument} from '@app/features/platform/DesktopLocalAppRuntime';
-import type {
-	NativeGatewayTransportAPI,
-	NativeGatewayTransportEvent,
+import {
+	NATIVE_GATEWAY_TRANSPORT_PROXIED_MESSAGE,
+	type NativeGatewayTransportAPI,
+	type NativeGatewayTransportEvent,
 } from '@fluxer/desktop_ipc/src/GatewayTransportContract';
 import {afterEach, beforeEach, describe, expect, test, vi} from 'vitest';
 
@@ -431,7 +432,7 @@ describe('native transport fallback', () => {
 	test('native creates the shell refuses count toward the fallback', async () => {
 		const stub = createNativeGatewayTransportStub({
 			create: async () => {
-				throw new Error('The native gateway transport cannot reach a gateway that resolves through a proxy');
+				throw new Error('The native gateway transport addon is unavailable');
 			},
 		});
 		installElectronAPI(stub.api);
@@ -452,6 +453,28 @@ describe('native transport fallback', () => {
 		);
 	});
 
+	test('a gateway the shell routes through a proxy switches new transports to the browser at once', async () => {
+		const stub = createNativeGatewayTransportStub({
+			create: async () => {
+				throw new Error(
+					`Error invoking remote method 'native-gateway-transport:create': Error: ${NATIVE_GATEWAY_TRANSPORT_PROXIED_MESSAGE}`,
+				);
+			},
+		});
+		installElectronAPI(stub.api);
+
+		const transport = createGatewayWireTransport('wss://gateway.example/', {binaryType: 'arraybuffer'});
+		expect(transport.kind).toBe(GatewayWireTransportKind.DESKTOP_NATIVE);
+		transport.on('error', () => undefined);
+		transport.start();
+		await flush();
+
+		const next = createGatewayWireTransport('wss://gateway.example/', {binaryType: 'arraybuffer'});
+		expect(next.kind).toBe(GatewayWireTransportKind.BROWSER);
+		next.start();
+		expect(FakeWebSocket.instances.map((socket) => socket.url)).toEqual(['wss://gateway.example/']);
+	});
+
 	test('an open between failures resets the count', async () => {
 		const stub = createNativeGatewayTransportStub();
 		installElectronAPI(stub.api);

fluxer_app/src/features/gateway/transport/GatewayWireTransport.ts

@@ -6,6 +6,7 @@ import {Logger} from '@app/features/platform/utils/AppLogger';
 import {randomUuid} from '@app/features/platform/utils/RandomUuid';
 import {getElectronAPI} from '@app/features/ui/utils/NativeUtils';
 import {
+	NATIVE_GATEWAY_TRANSPORT_PROXIED_MESSAGE,
 	type NativeGatewayTransportAPI,
 	type NativeGatewayTransportCloseRequest,
 	type NativeGatewayTransportEvent,
@@ -433,7 +434,11 @@ class DesktopNativeGatewayWireTransport extends BaseGatewayWireTransport {
 
 	private failOpen(error: unknown): void {
 		if (this.disposed) return;
-		recordNativeGatewayFailureWithoutOpen();
+		if (describeError(error).includes(NATIVE_GATEWAY_TRANSPORT_PROXIED_MESSAGE)) {
+			switchProxiedGatewayToBrowserTransport();
+		} else {
+			recordNativeGatewayFailureWithoutOpen();
+		}
 		this.abandonNativeConnection();
 		this.emitTransportFailure(error);
 	}
@@ -600,6 +605,13 @@ function recordNativeGatewayFailureWithoutOpen(): void {
 	}
 }
 
+function switchProxiedGatewayToBrowserTransport(): void {
+	const state = getRouterState();
+	if (isNativeGatewayFallbackActive(state)) return;
+	state.nativeFailuresWithoutOpen = NATIVE_GATEWAY_FAILURES_BEFORE_BROWSER_FALLBACK;
+	log.warn('Desktop native gateway transport cannot use the configured proxy, using the browser transport');
+}
+
 function createDesktopConnectionId(): string {
 	return `${DESKTOP_CONNECTION_ID_PREFIX}${getRouterState().rendererRouterId}:${randomUuid()}`;
 }