Proxy Nominatim requests

Per Nominatim usage policy

app/build.gradle.kts

@@ -95,6 +95,7 @@ android {
             resValue("string", "mapbox_key", tasks_mapbox_key_debug ?: "")
             resValue("string", "google_key", tasks_google_key_debug ?: "")
             resValue("string", "tasks_caldav_url", tasks_caldav_url ?: "https://caldav.tasks.org")
+            resValue("string", "tasks_nominatim_url", tasks_caldav_url ?: "https://nominatim.tasks.org")
             isTestCoverageEnabled = project.hasProperty("coverage")
         }
         getByName("release") {

app/src/main/java/org/tasks/http/HttpClientFactory.kt

@@ -0,0 +1,42 @@
+package org.tasks.http
+
+import android.content.Context
+import at.bitfire.cert4android.CustomCertManager
+import dagger.hilt.android.qualifiers.ApplicationContext
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import okhttp3.OkHttpClient
+import okhttp3.internal.tls.OkHostnameVerifier
+import org.tasks.DebugNetworkInterceptor
+import org.tasks.preferences.Preferences
+import javax.inject.Inject
+import javax.net.ssl.SSLContext
+
+class HttpClientFactory @Inject constructor(
+        @ApplicationContext private val context: Context,
+        private val preferences: Preferences,
+        private val interceptor: DebugNetworkInterceptor,
+) {
+
+    suspend fun newCertManager() = withContext(Dispatchers.Default) {
+        CustomCertManager(context)
+    }
+
+    suspend fun newBuilder(foreground: Boolean = false): OkHttpClient.Builder =
+            newBuilder(newCertManager(), foreground)
+
+    fun newBuilder(customCertManager: CustomCertManager, foreground: Boolean = false): OkHttpClient.Builder {
+        customCertManager.appInForeground = foreground
+        val hostnameVerifier = customCertManager.hostnameVerifier(OkHostnameVerifier)
+        val sslContext = SSLContext.getInstance("TLS")
+        sslContext.init(null, arrayOf(customCertManager), null)
+        val builder = OkHttpClient()
+                .newBuilder()
+                .sslSocketFactory(sslContext.socketFactory, customCertManager)
+                .hostnameVerifier(hostnameVerifier)
+        if (preferences.isFlipperEnabled) {
+            interceptor.apply(builder)
+        }
+        return builder
+    }
+}

app/src/main/java/org/tasks/http/HttpException.kt

@@ -0,0 +1,5 @@
+package org.tasks.http
+
+import java.io.IOException
+
+class HttpException(code: Int, message: String) : IOException("$code $message")

app/src/main/java/org/tasks/location/GeocoderNominatim.kt

@@ -1,38 +1,37 @@
 package org.tasks.location
 
+import android.content.Context
 import com.google.gson.JsonElement
 import com.google.gson.JsonParser
+import dagger.hilt.android.qualifiers.ApplicationContext
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
-import okhttp3.OkHttpClient
 import okhttp3.Request
 import org.tasks.BuildConfig
-import org.tasks.DebugNetworkInterceptor
+import org.tasks.R
 import org.tasks.data.Place
 import org.tasks.data.Place.Companion.newPlace
-import org.tasks.preferences.Preferences
-import java.io.IOException
+import org.tasks.http.HttpClientFactory
+import org.tasks.http.HttpException
 import javax.inject.Inject
 
 class GeocoderNominatim @Inject constructor(
-        private val preferences: Preferences,
-        private val interceptor: DebugNetworkInterceptor,
+        @ApplicationContext context: Context,
+        private val httpClientFactory: HttpClientFactory,
 ) : Geocoder {
+    private val url = context.getString(R.string.tasks_nominatim_url)
+
     override suspend fun reverseGeocode(mapPosition: MapPosition): Place? =
             withContext(Dispatchers.IO) {
-                val builder = OkHttpClient().newBuilder()
-                if (preferences.isFlipperEnabled) {
-                    interceptor.apply(builder)
-                }
-                val client = builder.build()
-                val url = "https://nominatim.openstreetmap.org/reverse?format=geocodejson&lat=${mapPosition.latitude}&lon=${mapPosition.longitude}"
+                val client = httpClientFactory.newBuilder(true).build()
+                val url = "$url/reverse?format=geocodejson&lat=${mapPosition.latitude}&lon=${mapPosition.longitude}"
                 val response = client.newCall(
                         Request.Builder().get().url(url).addHeader(USER_AGENT, UA_VALUE).build()
                 ).execute()
                 if (response.isSuccessful) {
                     response.body?.string()?.let { jsonToPlace(it) }
                 } else {
-                    throw IOException("${response.code} ${response.message}")
+                    throw HttpException(response.code, response.message)
                 }
             }
 

app/src/main/java/org/tasks/location/LocationPickerActivity.kt

@@ -34,6 +34,7 @@ import org.tasks.PermissionUtil.verifyPermissions
 import org.tasks.R
 import org.tasks.Strings.isNullOrEmpty
 import org.tasks.activities.PlaceSettingsActivity
+import org.tasks.analytics.Firebase
 import org.tasks.billing.Inventory
 import org.tasks.caldav.GeoUtils.toLikeString
 import org.tasks.data.LocationDao
@@ -93,6 +94,7 @@ class LocationPickerActivity : InjectingAppCompatActivity(), Toolbar.OnMenuItemC
     @Inject lateinit var inventory: Inventory
     @Inject lateinit var colorProvider: ColorProvider
     @Inject lateinit var locationProvider: LocationProvider
+    @Inject lateinit var firebase: Firebase
     
     private var disposables: CompositeDisposable? = null
     private var mapPosition: MapPosition? = null
@@ -232,10 +234,14 @@ class LocationPickerActivity : InjectingAppCompatActivity(), Toolbar.OnMenuItemC
     fun selectLocation() {
         val mapPosition = map.mapPosition ?: return
         loadingIndicator.visibility = View.VISIBLE
-        lifecycleScope.launch {
-            val place = geocoder.reverseGeocode(mapPosition) ?: newPlace(mapPosition)
+        try {
+            lifecycleScope.launch {
+                returnPlace(geocoder.reverseGeocode(mapPosition) ?: newPlace(mapPosition))
+            }
+        } catch (e: Exception) {
             loadingIndicator.visibility = View.GONE
-            returnPlace(place)
+            firebase.reportException(e)
+            toaster.longToast(e.message)
         }
     }
 

app/src/release/res/values/keys.xml

@@ -2,4 +2,5 @@
 <resources>
   <string name="app_name">Tasks</string>
   <string name="tasks_caldav_url">https://caldav.tasks.org</string>
+  <string name="tasks_nominatim_url">https://nominatim.tasks.org</string>
 </resources>