Merge pull request #3101 from wordpress-mobile/revert-3067-fix-useragent-anr

Revert "[ANR fix] Move UserAgent initialization to a background thread"

Author: kidinov

example/src/main/java/org/wordpress/android/fluxc/example/di/AppConfigModule.java

@@ -15,8 +15,6 @@
 
 import java.lang.reflect.Field;
 
-import javax.inject.Singleton;
-
 import dagger.Module;
 import dagger.Provides;
 
@@ -43,7 +41,6 @@ public AppSecrets provideAppSecrets() {
     }
 
     @Provides
-    @Singleton
     public UserAgent provideUserAgent(Context appContext) {
         return new UserAgent(appContext, "fluxc-example-android");
     }

fluxc/src/main/java/org/wordpress/android/fluxc/network/UserAgent.kt

@@ -2,45 +2,13 @@ package org.wordpress.android.fluxc.network
 
 import android.content.Context
 import android.webkit.WebSettings
-import kotlinx.coroutines.CoroutineDispatcher
-import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.launch
-import org.wordpress.android.util.AppLog
 import org.wordpress.android.util.PackageUtils
 
-@Suppress("MemberNameEqualsClassName")
-class UserAgent @JvmOverloads constructor(
-    private val appContext: Context?,
-    private val appName: String,
-    bgDispatcher: CoroutineDispatcher = Dispatchers.Default
-) {
-    /**
-     * User-Agent string when making HTTP connections, for both API traffic and WebViews.
-     * Appends "[appName]/version" to WebView's default User-Agent string for the webservers
-     * to get the full feature list of the browser and serve content accordingly, e.g.:
-     *    "Mozilla/5.0 (Linux; Android 6.0; Android SDK built for x86_64 Build/MASTER; wv)
-     *    AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/44.0.2403.119 Mobile Safari/537.36
-     *    wp-android/4.7"
-     */
-    var userAgent: String = getAppNameVersion()
-        private set
-
-    private val coroutineScope = CoroutineScope(bgDispatcher)
+@SuppressWarnings("SwallowedException", "TooGenericExceptionCaught", "MemberNameEqualsClassName")
+class UserAgent(appContext: Context?, appName: String) {
+    val userAgent: String
 
     init {
-        coroutineScope.launch {
-            initUserAgent()
-        }
-    }
-
-    /**
-     * Initializes the User-Agent string.
-     * This method will be called asynchronously to avoid blocking the main thread,
-     * because `WebSettings.getDefaultUserAgent()` can be slow.
-     */
-    @Suppress("TooGenericExceptionCaught", "SwallowedException")
-    private fun initUserAgent() {
         // Device's default User-Agent string.
         // E.g.:
         //   "Mozilla/5.0 (Linux; Android 6.0; Android SDK built for x86_64 Build/MASTER; wv)
@@ -50,17 +18,17 @@ class UserAgent @JvmOverloads constructor(
         } catch (e: RuntimeException) {
             // `getDefaultUserAgent()` can throw an Exception
             // see: https://github.com/wordpress-mobile/WordPress-Android/issues/20147#issuecomment-1961238187
-            AppLog.e(
-                AppLog.T.UTILS,
-                "Error getting the user's default User-Agent, ${e.stackTraceToString()}"
-            )
-            return
+            ""
         }
-
-        userAgent = "$defaultUserAgent ${getAppNameVersion()}"
+        // User-Agent string when making HTTP connections, for both API traffic and WebViews.
+        // Appends "wp-android/version" to WebView's default User-Agent string for the webservers
+        // to get the full feature list of the browser and serve content accordingly, e.g.:
+        //    "Mozilla/5.0 (Linux; Android 6.0; Android SDK built for x86_64 Build/MASTER; wv)
+        //    AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/44.0.2403.119 Mobile Safari/537.36
+        //    wp-android/4.7"
+        val appWithVersion = "$appName/${PackageUtils.getVersionName(appContext)}"
+        userAgent = if (defaultUserAgent.isNotEmpty()) "$defaultUserAgent $appWithVersion" else appWithVersion
     }
 
-    private fun getAppNameVersion() = "$appName/${PackageUtils.getVersionName(appContext)}"
-
     override fun toString(): String = userAgent
 }

fluxc/src/test/java/org/wordpress/android/fluxc/network/UserAgentTest.kt

@@ -1,7 +1,6 @@
 package org.wordpress.android.fluxc.network
 
 import android.webkit.WebSettings
-import kotlinx.coroutines.Dispatchers
 import org.junit.Test
 import org.junit.runner.RunWith
 import org.mockito.Mockito.mockStatic
@@ -23,8 +22,7 @@ class UserAgentTest {
     fun testUserAgent() = withMockedPackageUtils {
         mockStatic(WebSettings::class.java).use {
             whenever(WebSettings.getDefaultUserAgent(context)).thenReturn(USER_AGENT)
-            // Use the Unconfined dispatcher to allow the test to run synchronously
-            val result = UserAgent(context, APP_NAME, bgDispatcher = Dispatchers.Unconfined)
+            val result = UserAgent(context, APP_NAME)
             assertEquals("$USER_AGENT $APP_NAME/$APP_VERSION", result.toString())
         }
     }
@@ -33,8 +31,7 @@ class UserAgentTest {
     fun testDefaultUserAgentFailure() = withMockedPackageUtils {
         mockStatic(WebSettings::class.java).use {
             whenever(WebSettings.getDefaultUserAgent(context)).thenThrow(RuntimeException(""))
-            // Use the Unconfined dispatcher to allow the test to run synchronously
-            val result = UserAgent(context, APP_NAME, bgDispatcher = Dispatchers.Unconfined)
+            val result = UserAgent(context, APP_NAME)
             assertEquals("$APP_NAME/$APP_VERSION", result.toString())
         }
     }