Client cannot access local server inside android:...

# ktor

[calidion]

Client cannot access local server inside android:

@RunWith(AndroidJUnit4::class)
class ServerInstrumentedTest {
    @Test
    fun should_test_server_client() = runTest {
        val app = ApplicationProvider.getApplicationContext<MainApplication>()
        val preference = app.preference
        val setting = Settings(preference)
        setting.localServerPort = 0
        val db = ZzDatabase.getDatabase(app.applicationContext)
        db.peer().clearData()
        val port = setting.localServerPort
        PeerServer.start(app, "127.0.0.1", port)
        val timeStamp = Time.now()
        val peer = Peer(
            "127.0.0.1",
            port,
            AddressType.IPV4,
            createdAt = timeStamp, updatedAt = timeStamp
        )

        runBlocking {
            val peerClient = PeerClient(app, peer)
            val response01 = peerClient.client.get("<http://www.baidu.com/>")
//            val response01 = peerClient.client.get(peer.baseUrl + "/")
            assertEquals(HttpStatusCode.OK, response01.status)
//            assertEquals("Hello From ZZ!\n", response01.bodyAsText())
        }
}

It can access out side servers, but not the local one. and this code can not be put inside android InstrumentedTest for my server needs reading configurations from android database

@Test
    fun testRoot() = testApplication {
        application {
            module()
        }
        val response = client.get("/")
        assertEquals(HttpStatusCode.OK, response.status)
        assertEquals("Hello, world!", response.bodyAsText())
    }

[Aleksei Tirman [JB]]

That's because the Android emulator's network is isolated from the local host network. See this answer for more information.

[calidion]

Seems not the same problem. because my tests run inside android emulators or testing phones too. They should be in the same network.

[Aleksei Tirman [JB]]

Are you able to access the server with other HTTP clients, for example, HttpURLConnection?

[calidion]

Yes. It works.

[calidion]

HttpURLConnection returns HTTP 200

[calidion]

you can check it here: https://github.com/Free-Web-Movement/zz/blob/main/app/src/androidTest/java/io/github/freewebmovement/zz/ServerInstrumentedTest.kt